JP4514875B2 - Transport pipe materials, transport pipes and lining materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport pipe used as a water pipe, for example.
[0002]
[Problems to be solved by the invention]
Generally, what is called a ductile cast iron pipe or a fume pipe is used as a transport pipe such as a water pipe. Each of these tubes has a lining layer for protecting the inner peripheral surface thereof. That is, in the ductile cast iron pipe, the inner peripheral surface of the main body (cast iron pipe) is covered with a lining layer in order to suppress corrosion, rusting, and abrasion of the inner peripheral surface. On the other hand, the fume tube is also provided with a lining layer on the inner peripheral surface side in order to improve wear resistance and roughness coefficient.
[0003]
By the way, such a lining layer is usually composed of ordinary cement mortar. However, it is difficult to say that the performance, particularly durability, is sufficiently satisfactory. For this reason, development of the technique which can provide the further outstanding durability to the said lining layer was awaited.
[0004]
Conventionally, a method called a propulsion method has been adopted in the underground laying work of transport pipes such as water pipes, instead of the conventional open-cut method. This propulsion method is characterized in that a jack is used to push the pipe horizontally in the ground and then add up sequentially. However, since the pipe receives a large compressive force in its axial direction, it is necessary to use a propelling pipe (transport pipe) having a larger wall thickness than when using the conventional method. However, when the wall thickness is increased, there is a problem that the transportation capacity of the pipe is lowered.
[0005]
Therefore, the problem to be solved by the present invention is to provide a technique capable of obtaining a lining layer having excellent durability. Another object of the present invention is to provide a technique for obtaining a transport pipe that can withstand a large compressive force without increasing the wall thickness.
[0006]
[Means for Solving the Problems]
As a result of diligent research to solve the above problems, the present inventor has found that the transport pipe or the material constituting the lining layer (transport pipe material) is denser and richer than conventional materials. I came to the conclusion that it would be good to use.
[0007]
And, as a result of further research from this point of view, the present inventor, cement, pozzolanic fine powder, aggregate having a particle size of 2 mm or less, water, water reducing agent, A composition comprising quartz powder having an average particle size of 3 to 20 μm and metal fibers and / or organic fibers, wherein the aggregate is river sand, land sand, sea sand, crushed stone, silica sand, or a mixture thereof. Yes, the compounding amount of the material other than the metal fiber and / or organic fiber is 5 to 50 parts by weight of pozzolanic fine powder with respect to 100 parts by weight of cement, 50 to 250 parts by weight of aggregate having a particle size of 2 mm or less, 10 to 30 parts by weight of water, 0.5 to 4 parts by weight of water reducing agent (in terms of solid content), 0.1 to 50 parts by weight of quartz powder having an average particle size of 3 to 20 μm, and the blending amount of metal fibers is after condensation 4% or less of the concrete volume and / or the amount of organic fibers is 10% or less of the concrete volume after setting The hardened concrete made of the composition is denser than conventional concrete, and has high strength and durability. Therefore, if this composition is used as a material for transport pipes (lining material), durability can be improved. It has been found that an excellent lining layer can be obtained. Further, it has been found that when this composition is used as a material for a transport pipe, a high-strength transport pipe that can withstand a large compressive force without increasing the wall thickness can be obtained.
[0008]
The present invention has been achieved based on these findings. That is, the above-described problem is a material used for a transport pipe, and this material includes cement, a pozzolanic fine powder, an aggregate having a particle size of 2 mm or less, water, and a water reducing agent. A material for transport pipes containing quartz powder having an average particle size of 3 to 20 μm and metal fibers and / or organic fibers, wherein the aggregate is river sand, land sand, sea sand, crushed stone, silica sand, or a mixture thereof The compounding amount of the material other than the metal fiber and / or organic fiber is 5 to 50 parts by weight of a pozzolanic fine powder and 50 to 250 parts by weight of an aggregate having a particle size of 2 mm or less with respect to 100 parts by weight of cement. 10 to 30 parts by weight of water, 0.5 to 4 parts by weight of water reducing agent (in terms of solid content), 0.1 to 50 parts by weight of quartz powder having an average particle size of 3 to 20 μm, and the amount of metal fibers condensed 4% or less of the concrete volume after and / or the amount of organic fiber is 10% or less of the concrete volume after setting This is solved by a material for a transport pipe.
[0009]
The previous challenge is
The present invention is solved by a transport pipe comprising the transport pipe material.
[0010]
Also, the previous issue is
A tubular body,
A lining layer provided on the inner peripheral surface of the main body
A transport pipe comprising:
The lining layer is solved by a transport pipe that is formed using the transport pipe material.
[0011]
The challenge ahead is
A material constituting a lining layer provided on the inner peripheral surface of the transport pipe,
The invention is solved by a lining material for a transport pipe, which is made of the transport pipe material.
[0012]
In addition, any cement may be used in the present invention. For example, various portland cements such as ordinary portland cement, early-strength portland cement, medium heat portland cement and low heat portland cement, or various mixed cements such as blast furnace cement and fly ash cement can be used. However, it is preferable to select early-strength Portland cement when more excellent early strength of concrete is required. On the other hand, when more excellent fluidity of concrete is desired, it is preferable to select medium heat Portland cement or low heat Portland cement.
[0013]
In the present invention, a pozzolanic fine powder is particularly used. This is because when the pozzolanic fine powder is blended, the concrete becomes dense due to its microfiller effect and cement dispersion effect, and the compressive strength is improved.
[0014]
The above effect increases as the addition amount of the pozzolanic fine powder increases. However, since the unit water amount increases when the pozzolanic fine powder is too much, the pozzolanic fine powder is 50 parts by weight or less with respect to 100 parts by weight of the cement. preferable. In addition, when the pozzolanic fine powder is 5 parts by weight or more with respect to 100 parts by weight of cement, the above effect is particularly remarkable.
[0015]
As the pozzolanic fine powder, silica fume, silica dust, fly ash, slag, volcanic ash, silica sol, precipitated silica and the like are used. Silica fume and silica dust generally have an average particle size of 1.0 μm or less, and thus do not need to be pulverized. Therefore, it can be said that it is a particularly preferred pozzolanic fine powder.
[0016]
In the present invention, in particular, an aggregate having a particle size of 2 mm or less (the lower limit may be any amount, but theoretically cannot be 0) is used. This is because the workability and separation resistance of the concrete, and further the strength after hardening and the resistance to cracking are improved by blending an aggregate having a particle size of 2 mm or less. In the present invention, the particle size of the aggregate means an 85% (weight) cumulative particle size. Therefore, a particle size of 2 mm or less does not mean that aggregates having a particle size larger than 2 mm are excluded.
[0017]
Moreover, although it overlaps with the previous description, in this invention, it is from a viewpoint of the isolation | separation resistance of concrete, or the strength improvement after hardening that the aggregate whose particle size is 2 mm or less was employ | adopted. However, as described above, aggregates having a particle size larger than 2 mm may be included. However, the maximum particle size is 2 mm or less, particularly 1. It is preferably 5 mm or less.
[0018]
The above effect increases as the amount of aggregate having a particle size of 2 mm or less increases. However, if the amount of aggregate exceeds 250 parts by weight with respect to 100 parts by weight of cement, it is not very meaningful. In addition, when the amount of aggregate is less than 50 parts by weight with respect to 100 parts by weight of cement, the above effect is poor. Therefore, 50 to 250 parts by weight, particularly 80 to 180 parts by weight of the aggregate is a preferable ratio with respect to 100 parts by weight of cement.
[0019]
Examples of the aggregate used in the present invention include river sand, land sand, sea sand, crushed stone, silica sand, and mixtures thereof. Incidentally, silica sand is most preferable.
[0020]
In the present invention, a water reducing agent is further used. Examples of this water reducing agent include, for example, ordinary water reducing agents such as lignin, naphthalene sulfonic acid, melamine, and polycarboxylic acid and AE water reducing agents, and particularly high performance water reducing agents and high performance AE water reducing agents. . The addition amount of this type of water reducing agent is 0.5 to 4 parts by weight in terms of solid content with respect to 100 parts by weight of cement from the viewpoint of fluidity and separation resistance of concrete, strength after curing, and cost. Ratio (outside split with respect to cement) is preferred.
[0021]
The amount of water used in the present invention is preferably such that the water / cement ratio is 10 to 30% by weight from the viewpoints of fluidity and separation resistance of the concrete, strength after hardening and durability. In particular, an amount such that the water / cement ratio is 15 to 25% by weight is preferable.
[0022]
Moreover, it is preferable that the material for transport pipes in this invention further contains the quartz powder whose average particle diameter is 3-20 micrometers. That is, by further using quartz powder having an average particle diameter of 3 to 20 μm, particularly 4 to 10 μm, the filling density of the cured body is increased. Therefore, the strength and durability of the transport pipe and its lining layer are further improved. And while ensuring this effect enough, the addition amount of quartz powder is 0.1-50 weight part (especially 20 weight with respect to 100 weight part of cement) from the surface of the fluidity | liquidity of concrete and the strength improvement of a hardening body. The ratio is preferably not less than 35 parts by weight and not more than 35 parts by weight. Incidentally, as the quartz powder, for example, amorphous quartz, opal or cristobalite silica-containing powder can be used.
[0023]
In the transport pipe material of the present invention, from the viewpoint of enhancing the toughness of the cured body, fibrous particles and / or flaky particles having an average particle size of 1 mm or less (any lower limit is acceptable, but theoretically cannot be 0). It is preferable that it is further included. In the case of fibrous particles, those having a needle ratio expressed by length / diameter of 3 or more are particularly preferred. However, in the present invention, the particle size of the particle is its maximum dimension (the length of the fibrous particle).
[0024]
Examples of the fibrous particles include wollastonite, bauxite, or mullite. On the other hand, examples of the flaky particles include mica flakes, talc flakes, vermiculite flakes, and alumina flakes.
[0025]
And while ensuring the said effect sufficiently, from the surface of the fluidity | liquidity of concrete, the intensity | strength of hardened | cured material, and the improvement of toughness, the addition amount of the fibrous particle and / or flaky particle | grains whose average particle size is 1 mm or less is 100 weight of cement. A ratio of 0.1 to 35 parts by weight (particularly 10 parts by weight or more and 25 parts by weight or less) is preferable with respect to parts.
[0026]
In the transport pipe material of the present invention, from the viewpoint of increasing the bending strength of the cured body, metal fibers and / or organic fibers, particularly metal fibers having a diameter of 0.005 to 1 mm and a length of 2 to 30 mm, and / or Or it is preferable that organic fiber is further included. Here, the fibers having the above-described characteristics are not expected to have great strength with respect to the strength of the fiber itself when the fiber has a diameter of less than 0.005 mm, and conversely with the fiber having a diameter of more than 1 mm. This is because the number is reduced when the blending amount is taken into consideration, and a large contribution cannot be expected to improve the bending strength of the cured body. On the other hand, if the length exceeds 30 mm, fiber balls are likely to be produced during kneading. On the other hand, if the length is less than 2 mm, the adhesion to the matrix is reduced, and great expectation can be obtained for improving the bending strength. Because there is no.
[0027]
Examples of the metal fibers include steel fibers and amorphous fibers. Among these, steel fibers are particularly preferable from the viewpoint of strength and cost. On the other hand, examples of the organic fibers include olefin fibers such as polyethylene fibers and polypropylene fibers, polyester fibers such as polyethylene terephthalate fibers, nylon fibers, aramid fibers, vinylon fibers, and carbon fibers.
[0028]
The blending amount of the metal fibers is preferably 4% or less of the concrete volume after setting (it should be blended). A particularly preferable blending amount is 3.5% or less. The blending amount of the organic fiber is preferably 10% or less (if it is blended) of the concrete volume after setting. A particularly preferable blending amount is 7% or less. In addition, this is suitably determined in consideration of the fluidity of the concrete and the bending strength of the hardened body within the above range.
[0029]
Any method can be adopted as the kneading method for the material for a transport pipe according to the present invention. Moreover, the apparatus used for kneading is not particularly limited, and various mixers such as an omni mixer, a pan-type mixer, a biaxial kneading mixer, and a tilting mixer can be used.
[0030]
And when this transport pipe material is used as the material of the transport pipe and its lining layer, the transport pipe is obtained by shaping the kneaded material into a predetermined shape and curing and curing it. Any method may be employed as the molding method at this time, and any method such as room temperature curing or steam curing may be employed as the curing method.
[0031]
On the other hand, the lining layer can be formed on the inner peripheral surface of the tube (cylindrical main body) by using a centrifugal force method, a centrifugal force projection method (see JIS A 5314), or the like (actually, curing and hardening). To become the above lining layer).
[0032]
Further, the transport pipe targeted by the present invention is used for transporting (conveying) liquids and powders, and in some cases gas etc., that is, sewer pipes, water pipes, irrigation drain pipes, siphon pipes, etc. It is. More specifically, a cast iron pipe (particularly a ductile cast iron pipe) provided with a lining layer on the inner peripheral surface, a normal reinforced concrete pipe or a fume pipe also provided with a lining layer on the inner peripheral surface, which is used in such applications. (Reinforced concrete pipes formed by centrifugal compaction), propulsion pipes laid underground by the propulsion method (finally, for example, water pipes, particularly sewer pipes), and the like. Furthermore, the main part of the transport pipe mentioned in this specification includes cast iron pipes (particularly ductile cast iron pipes), ordinary reinforced concrete pipes, roll-rolled reinforced concrete pipes, spanned pipes with sockets, unreinforced concrete pipes, and permeable concrete pipes. , Prestressed concrete pipes, and further fume pipes.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
The material for a transport pipe according to the present invention is a material used for a transport pipe (formation of the transport pipe itself or a lining layer provided on the inner peripheral surface thereof), which is cement, pozzolanic fine powder, particle size Includes an aggregate of 2 mm or less, water, and a water reducing agent.
[0034]
The cement in the transport pipe material may be any cement. For example, various portland cements such as ordinary portland cement, early-strength portland cement, medium heat portland cement, low heat portland cement, and various mixed cements such as blast furnace cement and fly ash cement can be used.
[0035]
The pozzolanic fine powder contained in the transport pipe material of the present invention is, for example, silica fume, silica dust, fly ash, slag, volcanic ash, silica sol, or precipitated silica. In particular, silica fume and / or silica dust. The blending amount of the pozzolanic fine powder is 5 to 50 parts by weight with respect to 100 parts by weight of cement.
[0036]
The transport pipe material of the present invention includes an aggregate having a particle size of 2 mm or less, particularly a maximum particle size of 2 mm or less, and further 1.5 mm or less. The amount of such aggregate added is 50 to 250 parts by weight, particularly 80 to 180 parts by weight, based on 100 parts by weight of cement. Aggregates include river sand, land sand, sea sand, crushed stone, quartz sand, and mixtures thereof. Of these, silica sand is particularly preferable.
[0037]
Examples of the water reducing agent contained in the transport pipe material of the present invention include, for example, ordinary water reducing agents such as lignin, naphthalene sulfonic acid, melamine, and polycarboxylic acid, and AE water reducing agents, particularly high performance water reducing agents and high performance water reducing agents. An AE water reducing agent is mentioned. The addition amount of this type of water reducing agent is a ratio of 0.5 to 4 parts by weight in terms of solid content with respect to 100 parts by weight of cement.
[0038]
The amount of water used in the present invention is such that the water / cement ratio is 10-30% by weight, in particular 15-25% by weight.
[0039]
The transport pipe material of the present invention optionally further contains quartz powder having an average particle size of 3 to 20 μm, particularly 4 to 10 μm. The amount of the quartz powder added is 0.1 to 50 parts by weight (particularly 20 parts by weight or more and 35 parts by weight or less) with respect to 100 parts by weight of cement. As the quartz powder, for example, amorphous quartz, opal or cristobalite silica-containing powder is used.
[0040]
Moreover, the transport pipe material of the present invention optionally further includes fibrous particles and / or flaky particles having an average particle size of 1 mm or less. In the case of fibrous particles, the needle ratio is particularly 3 or more. The fibrous particles are wollastonite, bauxite, mullite or the like. On the other hand, the flaky particles are mica flakes, talc flakes, vermiculite flakes, alumina flakes, and the like. The amount of fibrous particles and / or flaky particles having an average particle size of 1 mm or less is 0.1 to 35 parts by weight (particularly 10 parts by weight or more and 25 parts by weight or less) with respect to 100 parts by weight of cement. is there.
[0041]
Moreover, the transport pipe material of the present invention optionally further includes metal fibers and / or organic fibers, particularly metal fibers and / or organic fibers having a diameter of 0.005 to 1 mm and a length of 2 to 30 mm. Examples of metal fibers include steel fibers and amorphous fibers. Of these, steel fibers are preferred. On the other hand, examples of the organic fibers include olefin fibers such as polyethylene fibers and polypropylene fibers, polyester fibers such as polyethylene terephthalate fibers, nylon fibers, aramid fibers, vinylon fibers, and carbon fibers. The amount of the metal fiber is 4% or less, particularly 3.5% or less, of the concrete volume after setting. On the other hand, the compounding amount of the organic fiber is 10% or less, particularly 7% or less of the concrete volume after setting.
[0042]
Any method can be adopted as a method for kneading the material for a transport pipe. Moreover, as an apparatus used for kneading | mixing, various mixers, such as an omni mixer, a pan-type mixer, a biaxial kneading mixer, a tilting cylinder mixer, can be used, for example.
[0043]
And when using the said transport pipe material for formation of a transport pipe and its lining layer, a transport pipe and its lining layer are obtained by shape | molding the kneaded material, and making it cure and harden | cure. Any method may be employed as the molding method, and any method such as room temperature curing or steam curing may be employed as the curing method.
[0044]
The transport pipe according to the embodiment of the present invention is laid in the ground and used as a water pipe or the like, and the transport pipe is configured by using the transport pipe material.
[0045]
Similarly, the transport pipe according to the embodiment of the present invention includes a cylindrical main body portion and a lining layer provided on the inner peripheral surface of the main body portion, and the lining layer uses the transport pipe material. It is characterized by comprising.
[0046]
Furthermore, the lining material of the transport pipe according to the embodiment of the present invention is a material constituting a lining layer provided on the inner peripheral surface of the transport pipe, and is made of the transport pipe material.
Hereinafter, the first embodiment of the present invention will be described in more detail with reference to FIG. FIG. 1 is a cross-sectional view of the transport pipe according to the present embodiment.
The transport pipe indicated by A in FIG. 1 is a pipe that is laid underground using the propulsion method, that is, a transport pipe called a propulsion pipe (hereinafter referred to as the present propulsion pipe).
[0047]
The present propelling pipe A has a cylindrical outer shape, and in particular, cement, pozzolanic fine powder, aggregate having a particle size of 2 mm or less, water, a water reducing agent, and an average particle size of 3 in particular. ˜20 μm quartz powder, fibrous particles having an average particle size of 1 mm or less (which may be replaced with flaky particles, or both fibrous and flaky particles may be used), and further metal fibers And concrete (details will be described later) including organic fibers (only one of metal fibers and organic fibers may be used).
[0048]
In addition, since this propulsion pipe A shown in the figure is located next to or after the head, the front end surface (left end surface) is flat. However, since the one located at the head plays a role of being pushed by the jack and penetrating the soil, an edge (blade) is formed on the tip side (actually, this edge is made of hard metal Is attached).
[0049]
Further, the present propulsion pipe A mentioned here as an embodiment of the present invention is connected to each other using a ring-shaped collar or the like. Therefore, ring-shaped recesses 1 for positioning the collar are formed at both ends, and both ends have the same shape. However, when one end of the connected propulsion pipe is stored (fitted) into the other end, when using a so-called socket joint system, it goes without saying that one end side has a larger diameter than the other end side. Will be configured.
[0050]
Now, this propulsion pipe A is comprised from the concrete using the material for transport pipes which concerns on this embodiment as mentioned above. That is, this propulsion pipe A is a hardened concrete body using the transport pipe material according to this embodiment. The propulsion pipe A configured as described above has a very high strength as compared with the conventional configuration made of a material, and the compressive strength is particularly high. For this reason, it is not necessary to increase the wall thickness as in the conventional case, although a large force is applied in the axial direction by the jack. That is, the propulsion pipe A has high strength and can withstand a large compressive force with a minimum necessary thickness. Therefore, a problem such as a decrease in the transport capacity of the pipe does not occur.
[0051]
Next, a specific example of the transport pipe material (a transport pipe material including at least cement, pozzolanic fine powder, an aggregate having a particle diameter of 2 mm or less, water, and a water reducing agent) will be described. The components (raw materials) of the material for a transport pipe according to this embodiment are as follows.
Cement: Low heat Portland cement (manufactured by Taiheiyo Cement Co., Ltd.)
Pozzolanic fine powder: Silica fume with an average particle size of 0.7 μm
Aggregate: 2: 1 (weight ratio) mixture of silica sand 4 and silica sand 5
Metal fiber: Steel fiber (diameter 0.2mm, length 15mm)
Organic fiber: Vinylon fiber (diameter 0.6mm, length 15mm)
Water reducing agent: Polycarboxylic acid-based high-performance AE water reducing agent
Water: Tap water
Quartz powder: Quartz powder with an average particle size of 7 μm
Fibrous particles: Wollastonite (average length 0.3 mm, needle ratio 4)
The blending ratio of the main components is as follows.
Cement: 100 parts by weight
Pozzolanic fine powder: 32.5 parts by weight
Aggregate: 120 parts by weight
High-performance AE water reducing agent: 1.0% by weight (solid content) based on cement
Water / cement ratio: 22% by weight
For kneading the materials, a method was adopted in which the above materials were put all together in a biaxial kneading mixer and kneaded.
[0052]
Curing was carried out by steam curing for 48 hours at the front (20 ° C.) and for 48 hours at 90 ° C.
[0053]
In addition, the compressive strength of the hardening body (main propelling pipe) obtained as described above was 210 MPa, and the bending strength was 25 MPa. Moreover, the flow value by the test method according to "JISR5201 (physical test method of cement) 11. Flow test" was 270 mm.
[0054]
For reference, the propulsion tube was manufactured by changing the blending conditions of the materials as follows, with the same kneading method and curing conditions as before.
Cement: 100 parts by weight
Pozzolanic fine powder: 32.5 parts by weight
Aggregate: 120 parts by weight
High-performance AE water reducing agent: 1.0% by weight (solid content) based on cement
Water / cement ratio: 22% by weight
Metal fiber: 2% of volume in concrete
The cured body (main propelling tube) thus obtained had a compressive strength of 210 MPa and a bending strength of 47 MPa. Moreover, the flow value by the test method according to "JISR5201 (physical test method of cement) 11. Flow test" was 250 mm.
[0055]
In addition, the propulsion tube was manufactured by changing the blending conditions of the materials as follows, with the same kneading method and curing conditions as before.
Cement: 100 parts by weight
Pozzolanic fine powder: 32.5 parts by weight
Aggregate: 120 parts by weight
Quartz powder: 30 parts by weight
Fibrous particles: 24 parts by weight
High-performance AE water reducing agent: 1.0% by weight (solid content) based on cement
Water / cement ratio: 22% by weight
Metal fiber: 2% of volume in concrete
The cured body (main propelling pipe) thus obtained had a compressive strength of 230 MPa and a bending strength of 47 MPa. Moreover, the flow value by the test method according to "JISR5201 (physical test method of cement) 11. Flow test" was 250 mm.
[0056]
Furthermore, the mixing conditions of the materials were changed as follows, and the present propulsion tube was manufactured with the same kneading method and curing conditions as before.
Cement: 100 parts by weight
Pozzolanic fine powder: 32.5 parts by weight
Aggregate: 120 parts by weight
Quartz powder: 30 parts by weight
Fibrous particles: 24 parts by weight
High-performance AE water reducing agent: 1.0% by weight (solid content) based on cement
Water / cement ratio: 22% by weight
Metal fiber: 2% of volume in concrete
Other: Add coarse aggregate (crushed stone 1505) at a ratio of 7: 3 (volume ratio) (the amount of coarse aggregate in concrete is 800 kg / m ^Three )
The compressive strength of the cured body (main propelling pipe) thus obtained was 135 MPa. The slump value was 1.5 cm.
[0057]
Next, a second embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a cross-sectional view of the transport pipe according to the present embodiment.
[0058]
The transport pipe indicated by B in FIG. 2 is a water pipe laid in the ground, particularly a sewer pipe (hereinafter referred to as a main water pipe).
[0059]
The water pipe B has a substantially cylindrical outer shape, that is, includes a substantially cylindrical main body 11 and a lining layer 12 provided on the inner peripheral surface of the main body 11.
[0060]
Among these, the main-body part 11 is comprised from cast iron (especially ductile cast iron). Note that one end side (the right end side in FIG. 2) has a large diameter for joining with an adjacent one.
[0061]
On the other hand, the lining layer 12 is provided corresponding to the entire area of the inner peripheral surface in order to suppress corrosion and rusting of the inner peripheral surface of the main body 11. In this embodiment, the lining layer 12 is provided. 12 is comprised from the material for transport pipes demonstrated in the said 1st Embodiment. That is, the lining layer 12 is configured using the lining material according to the present embodiment.
[0062]
Specifically, the lining layer 12 includes cement, pozzolanic fine powder, aggregate having a particle size of 2 mm or less, water, a water reducing agent, and quartz powder having an average particle size of 3 to 20 μm, Fibrous particles having an average particle size of 1 mm or less (which may be replaced with flaky particles, or both fibrous and flaky particles may be used), and further metal fibers and organic fibers (metal fibers and Or any one of organic fibers).
[0063]
In the present embodiment, the main body 11 is made of cast iron (ductile cast iron) as an example. However, the main body 11 is made of reinforced concrete, in particular centrifugally compacted reinforced concrete, instead of cast iron. It may be configured (in this case, the main body 11 is particularly called a fume tube).
[0064]
The main water pipe B, in particular, the lining layer 12 is made of concrete using the transport pipe material according to the present embodiment as described above. That is, the lining layer 12 constituting the water pipe B is a concrete hardened body using the transport pipe material according to the present embodiment. In the main water pipe B configured as described above, the lining layer 12 is denser and has a very high strength as compared with a lining layer 12 made of a conventional material such as mortar. Therefore, durability far superior to the conventional one, particularly acid resistance can be obtained.
[0065]
In the above embodiment, an example in which the technology of the present invention is applied to a propulsion pipe and a water pipe (its lining layer) has been given. However, needless to say, the application of the present invention is not limited to this, and can be applied to all types of pipes (transport pipes).
[0066]
【The invention's effect】
According to the present invention, a transport pipe lining layer having excellent durability can be obtained. In addition, a transport pipe that can withstand a large compressive force can be obtained without increasing the wall thickness.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a transport pipe according to a first embodiment of the present invention.
FIG. 2 is a sectional view of a transport pipe according to a second embodiment of the present invention.
[Explanation of symbols]
A propulsion pipe (transport pipe)
1 Recessed pipe (transport pipe) recess
B Water pipe (transport pipe)
11 Main body of water pipe (transport pipe)
12 Lining layer of water pipe (transport pipe)

Claims (7)

A material used for a transport pipe, which is made of cement, pozzolanic fine powder, aggregate having a particle size of 2 mm or less, water, a water reducing agent, and quartz powder having an average particle size of 3 to 20 μm. And a material for a transport pipe containing metal fibers and / or organic fibers,
The aggregate is river sand, land sand, sea sand, crushed stone, quartz sand, or a mixture thereof;
The amount of the material other than the metal fiber and / or organic fiber is 5 to 50 parts by weight of pozzolanic fine powder, 50 to 250 parts by weight of aggregate having a particle size of 2 mm or less, and 10 parts of water with respect to 100 parts by weight of cement. -30 parts by weight, water reducing agent 0.5-4 parts by weight (in terms of solid content), 0.1-50 parts by weight of quartz powder having an average particle size of 3-20 μm,
4% or less of the concrete volume after setting and / or 10% or less of the concrete volume after setting, and / or the amount of organic fiber,
A material for transport pipes, characterized in that The material for transport pipes according to claim 1 , comprising fibrous particles and / or flaky particles having an average particle size of 1 mm or less in a blending amount of 0.1 to 35 parts by weight with respect to 100 parts by weight of cement. . The transport pipe material according to claim 1 or 2 , wherein the metal fibers are steel fibers. Any said organic fibers, olefin fibers, polyester fibers, nylon fibers, aramid fibers, vinylon fibers, according to claim 1, wherein the at least one selected from the group of carbon fibers The material for transport pipes according to crab. A transport pipe comprising the transport pipe material according to claim 1 . It is a transport pipe which comprises a cylindrical main-body part and the lining layer provided in the internal peripheral surface of this main-body part, Comprising: The said lining layer is for transport pipes in any one of Claims 1-4 . A transport pipe made of a material. A material for forming a lining layer provided on an inner peripheral surface of a transport pipe, comprising the transport pipe material according to any one of claims 1 to 4 , wherein the transport pipe has a lining material.

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