JPH0154306B2 - - Google Patents
Info
- Publication number
- JPH0154306B2 JPH0154306B2 JP10987085A JP10987085A JPH0154306B2 JP H0154306 B2 JPH0154306 B2 JP H0154306B2 JP 10987085 A JP10987085 A JP 10987085A JP 10987085 A JP10987085 A JP 10987085A JP H0154306 B2 JPH0154306 B2 JP H0154306B2
- Authority
- JP
- Japan
- Prior art keywords
- paste
- cement
- hardened
- water
- aggregate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004568 cement Substances 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012783 reinforcing fiber Substances 0.000 claims description 4
- 238000010924 continuous production Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 239000008030 superplasticizer Substances 0.000 claims 1
- 241001465754 Metazoa Species 0.000 description 5
- 238000010828 elution Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Natural products O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Panels For Use In Building Construction (AREA)
Description
（産業上の利用分野）
本発明はCa（OH）2の溶出がなく且つ植物、微
生物、小動物等の棲息に適した連続した空隙を有
するセメント硬化体及びその製造方法に関するも
のである。
（従来の技術）
従来における透水性ココンクリートは水中で使
用（養生）するとCa（OH）2が長期間（例えば１
年間）溶出し、その結果植物、微生物、小動物等
はその間棲息困難となるばかりでなく耐久性がそ
れにより著しく減少していた。
（発明が解決しようとする問題点）
本発明は以上の従来の問題を解決しCa（OH）2
の溶出を防止して植物、微生物、小動物等の棲息
に適し且つ耐久性を有する連続した空隙を有する
セメント硬化体及びその製造方法の提供を目的と
する。
（問題点を解決するための手段）
以下本発明の連続した空隙を有するセメント硬
化体及びその製造方法を説明する。
第１図及び第２図は本発明のセメント硬化体を
示し、該セメント硬化体１は次の工程により製造
される。
すなわち第１の工程は活性シリカ（SiO2を75
％以上含有していることが望ましい）、水、セメ
ント及び高性能減水剤（β―ナフタリンスルホン
酸ホルマリン縮合物等）を混合してペーストを作
る工程である。
ここで活性シリカとして予め水に混合させたも
の又はSiO2溶液を用いることが望ましい。
又水：セメント＝0.25〜0.40：１に、活性シリ
カ：セメント＝0.15〜0.40：１に及び高性能減水
剤：セメント＝0.05〜0.03：１に調整する。
以上の成分中活性シリカはセメントの成分
（C3S、C2S等）が水和により生成されるCa
（OH）2と反応しlCaO―mSiO2―nH2O系化合物を
生成させてCa（OH）2の溶出を抑制すると共にペ
ースト皮膜をち密化して製造されたセメント硬化
体１の強度を向上させるものである。
従つて活性シリカの混合比率は一定の前記範囲
内とすべきであり、例えばこれが少い場合Ca
（OH）2の溶出の抑制が困難になると共に強度も
十分なものとならず逆に多い場合はCa（OH）2の
溶出の抑制は出来てもかえつて強度の低下をもた
らす。
次に前記成分中高性能減水剤は水：セメントの
比率の抑制を可能にしてセメント硬化体１の強度
を向上させると共に前記ペーストの粘度の調整に
用いるものである。
このペーストの粘度は次の工程で述べられる様
に骨材２への付着厚さ、空隙３の形成等に影響を
与えることになり20〜150ポアズ（見掛けの粘度）
が適当である。
次に第２の工程であるが、該工程は前記ペース
トを骨材（砂、砂利、砕石、スラグ、軽量骨材
等）２に付着しそれらを硬化させる工程である。
このペーストの体積量については骨材２の空隙
体積の30〜70％を埋める程度にする。
これは製造されたセメント硬化体１に適度の連
続した空隙３を形成させるためであり、従つてペ
ーストの量が多くなれば空隙３の量は減少する。
又ペーストの粘度も重要でありこれが低い場合
は水状になつて骨材２から垂れ落ち逆に高い場合
は骨材２の表面に均一に付着しない。
以上の工程によりセメント硬化体が製造される
のであるが、その強度を向上させたい場合には次
の方法を用いればよい。
すなわち前記第１の工程のペーストにカーボン
繊維等の補強繊維（３〜10mm長さ）をペースト：
補強繊維＝１：0.01〜0.05の比率で混入すればよ
い。
この様に補強繊維を用いればその強度を30〜40
％程度向上させることが出来る。
（実施例）
Ａ 活性シリカ／セメントの比率（SF／Ｃ）を
０、0.20及び0.25の各々に調整して活性シリ
カ、水、セメント及び高性能減水剤を混合した
ペーストで直径５cm、高さ10cmの円柱供試体を
作つた。
これらを水中養生28日後重量の４倍の蒸留水
中に浸漬してそのPH測定を行つた結果を次に示
す。
(Field of Industrial Application) The present invention relates to a hardened cement body that does not elute Ca(OH) 2 and has continuous voids that are suitable for habitat of plants, microorganisms, small animals, etc., and a method for producing the same. (Conventional technology) When conventional water-permeable coconcrete is used (cured) in water, Ca(OH) 2 remains for a long period of time (for example, 1
As a result, not only did plants, microorganisms, and small animals find it difficult to live there, but their durability was also significantly reduced. (Problems to be solved by the invention) The present invention solves the above conventional problems and
The purpose of the present invention is to provide a hardened cement body having continuous voids that is suitable for the habitation of plants, microorganisms, small animals, etc., and has continuous voids, and a method for producing the same. (Means for Solving the Problems) A hardened cement body having continuous voids and a method for producing the same according to the present invention will be described below. FIGS. 1 and 2 show a hardened cement body 1 of the present invention, and the hardened cement body 1 is manufactured by the following steps. That is, the first step is activated silica (SiO 2
This is a process of making a paste by mixing water, cement, and a high performance water reducing agent (β-naphthalene sulfonic acid formalin condensate, etc.). Here, it is desirable to use activated silica mixed in water in advance or a SiO 2 solution. Also, the water:cement ratio is adjusted to 0.25-0.40:1, the activated silica:cement ratio is adjusted to 0.15-0.40:1, and the high performance water reducer:cement ratio is adjusted to 0.05-0.03:1. Among the above components, activated silica is Ca produced by hydration of cement components (C 3 S, C 2 S, etc.).
(OH) 2 to generate lCaO-mSiO 2 -nH 2 O-based compounds to suppress the elution of Ca(OH) 2 and densify the paste film to improve the strength of the manufactured cement hardened body 1. It is something. Therefore, the mixing ratio of activated silica should be within the above-mentioned range; for example, if it is small, Ca
It becomes difficult to suppress the elution of Ca(OH) 2 and the strength is not sufficient. Conversely, if the amount is large, even if the elution of Ca(OH) 2 can be suppressed, the strength will decrease. Next, the high performance water reducing agent among the components is used to improve the strength of the hardened cement body 1 by suppressing the water:cement ratio and to adjust the viscosity of the paste. The viscosity of this paste affects the adhesion thickness to the aggregate 2, the formation of voids 3, etc., as described in the next step, and is 20 to 150 poise (apparent viscosity).
is appropriate. Next is the second step, which is a step in which the paste is attached to aggregate (sand, gravel, crushed stone, slag, lightweight aggregate, etc.) 2 and hardened. The volume of this paste should be such that it fills 30 to 70% of the volume of voids in the aggregate 2. This is to form a suitable amount of continuous voids 3 in the manufactured hardened cement body 1, and therefore, as the amount of paste increases, the amount of voids 3 decreases. The viscosity of the paste is also important; if the viscosity is low, it becomes watery and drips from the aggregate 2, whereas if it is high, it does not adhere uniformly to the surface of the aggregate 2. A hardened cement body is produced through the above steps, but if it is desired to improve its strength, the following method may be used. That is, paste reinforcing fibers (3 to 10 mm length) such as carbon fibers to the paste of the first step:
The reinforcing fibers may be mixed at a ratio of 1:0.01 to 0.05. Using reinforcing fibers in this way increases the strength by 30 to 40
% can be improved. (Example) A A paste made by mixing activated silica, water, cement, and a high performance water reducer with the activated silica/cement ratio (SF/C) adjusted to 0, 0.20, and 0.25, with a diameter of 5 cm and a height of 10 cm. A cylindrical specimen was made. After 28 days of curing in water, these were immersed in distilled water four times their weight and their PH was measured.The results are shown below.
【表】
以上で明らかな通りCa（OH）2はlCaO―
mSiO2―nH2O系化合物となつてその溶出が抑
制されていることが理解される。
Ｂ SiO2を86％含有する活性シリカ（0.2重量部）
を水（0.3重量部）中に分散させ、更にセメン
ト（１重量部）及び高性能減水剤（0.02重量
部）を付加混合し70ポアズ（見掛けの粘度）の
ペーストを作つた。
該ペースト（２重量部）と７号砕石（10重量
部）の骨材２を混合し直径10cm、高さ20cmの円
柱供試体を作つた。
この圧縮強度試験及び透水試験を行つた結果
を次に示す。[Table] As is clear from the above, Ca(OH) 2 is lCaO―
It is understood that mSiO 2 --nH 2 O-based compounds are formed and their elution is suppressed. B Activated silica containing 86% SiO 2 (0.2 parts by weight)
was dispersed in water (0.3 parts by weight), and cement (1 part by weight) and high performance water reducer (0.02 parts by weight) were added and mixed to make a paste of 70 poise (apparent viscosity). The paste (2 parts by weight) and Aggregate 2 of No. 7 crushed stone (10 parts by weight) were mixed to prepare a cylindrical specimen with a diameter of 10 cm and a height of 20 cm. The results of the compressive strength test and water permeability test are shown below.
【表】
以上で明らかな通り一般まぶしセメント硬化
体の強度（100〜150Kg／cm2）と比較して著しく
大きいことが理解される。
（効果）
本発明の連続した空隙を有するセメント硬化体
及びその製造方法の効果は次の通り。
(1) 本発明のセメント硬化体は特許請求の範囲に
記載した構成であり、、特に活性シリカを含有
するためCa（OH）2の溶出が少なく植物、微生
物、小動物等の棲息に対して悪影響がない。
(2) 本発明のセメント硬化体は同上の構成であ
り、特にペーストを骨材に付着して硬化させた
ものであるため連続した空隙が形成されて植
物、微生物、小動物等の棲息に適する。
(3) 本発明のセメント硬化体の製造方法は特許請
求の範囲に記載した構成であるため前記セメン
ト硬化体の製造を容易に行うことが出来る。[Table] As is clear from the above, it is understood that the strength is significantly higher than that of general hardened cement (100 to 150 Kg/cm 2 ). (Effects) The effects of the hardened cement body having continuous voids and the manufacturing method thereof of the present invention are as follows. (1) The hardened cement product of the present invention has the structure described in the claims, and because it particularly contains active silica, elution of Ca(OH) 2 is low and has a negative impact on the habitat of plants, microorganisms, small animals, etc. There is no. (2) The hardened cement product of the present invention has the same structure as above, and in particular, since it is made by adhering paste to aggregate and hardening it, continuous voids are formed, making it suitable for habitat of plants, microorganisms, small animals, etc. (3) Since the method for manufacturing a hardened cement body of the present invention has the structure described in the claims, the hardened cement body can be easily manufactured.
第１図は本発明のセメント硬化体の斜視図、第
２図は同上セメント硬化体の拡大断面図
１……セメント硬化体、２……骨材、３……空
隙。
FIG. 1 is a perspective view of a hardened cement body of the present invention, and FIG. 2 is an enlarged sectional view of the same hardened cement body. 1... hardened cement body, 2... aggregate, 3... voids.
Claims (1)
を混合したペーストを骨材に付着しそれらを硬化
させた連続した空隙を有するセメント硬化体。 ２ 活性シリカ、水、セメント及び高性能減水剤
を混合してペーストを作る工程と、骨材にその空
隙体積の30〜70％の量の前記ペーストを付着しそ
れらを硬化させる工程とからなる連続した空隙を
有するセメント硬化体の製造方法。 ３ ペーストに補強繊維を混入した特許請求の範
囲第１項記載の連続した空隙を有するセメント硬
化体。[Scope of Claims] 1. A cement hardened body having continuous voids in which a paste containing activated silica, water, cement, and a high performance water reducing agent is adhered to aggregate and then hardened. 2 A continuous process consisting of a step of mixing activated silica, water, cement and a superplasticizer to form a paste, and a step of applying the paste to the aggregate in an amount of 30 to 70% of its pore volume and curing them. A method for producing a hardened cement body having voids. 3. A hardened cement body having continuous voids according to claim 1, in which reinforcing fibers are mixed into the paste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10987085A JPS61266371A (en) | 1985-05-21 | 1985-05-21 | Cement set body having continuous gaps and manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10987085A JPS61266371A (en) | 1985-05-21 | 1985-05-21 | Cement set body having continuous gaps and manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61266371A JPS61266371A (en) | 1986-11-26 |
| JPH0154306B2 true JPH0154306B2 (en) | 1989-11-17 |
Family
ID=14521279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10987085A Granted JPS61266371A (en) | 1985-05-21 | 1985-05-21 | Cement set body having continuous gaps and manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61266371A (en) |
-
1985
- 1985-05-21 JP JP10987085A patent/JPS61266371A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61266371A (en) | 1986-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |