JPS5815451B2 - Soda Setsukai Glass Silicone Glass Senio Thai Cement Alkali Seinisuru Hohou - Google Patents

Description

[Detailed Description of the Invention] Attempts to improve strength and durability by mixing glass fiber with mortar or plaster containing Portland cement, lime milk Ca(OH)2, water glass, etc. are quite old. Since then, many companies at home and abroad have been carrying out this method, but most of them have not been very effective.

The main reason for this is that free Ca(OH)2, Mg(OH)2 and KOH are released during the hydration solidification reaction of these cements.
, NaOH, etc. are soaked on the surface of the glass fibers to reduce the tensile strength of the glass fibers, and even after solidification, such as Portland cement, Ca(OH)
)2 etc. are contained in the form of an aqueous solution.

Therefore, in general, the cement alkalinity resistance of many glasses is
Since its acid resistance and water resistance are extremely low, it is unsuitable as a reinforcing fiber material for Portland cements and calcareous cements that contain a large amount of alkaline components.

Here, the present invention uses a mixed aqueous solution of a strong inorganic salt of zirconium, that is, zirconium chloride, zirconium sulfate, or zirconium nitrate, and a strong inorganic salt of hafnium, that is, hafnium chloride, hafnium sulfate, or hafnium nitrate. This is a method of ion-exchanging the surface of glass fibers to form a dense surface of zirconium and hafnium to provide cement alkalinity resistance. According to this method, soda lime glass fibers are easily and It was found that the same or higher tensile strength can be maintained.

In addition, the above tensile strength should withstand cement alkalinity,
It was also found that it was rising even further.

Examples will be described below.

Example In this example, zirconium chloride and hafnium chloride were used.

The concentrations are shown in the table below. The procedure is to first add 1.0% zirconylam chloride and 1% hafnium chloride in a beaker.
．． Prepare an aqueous solution with a concentration of 0%, put it in a boiling water bath, raise the temperature to 90℃ or higher, and prepare it in advance.
Soda-lime glass fiber, diameter 24~
Cut 20 pieces of 19μ and 100cm long at 50cm, and divide them into 2 sets, A" and B" as follows: A: 50cm x 20 pieces B: 50cm x 20 pieces A 10 cm portion of one end of the fiber was immersed in the above aqueous solution, left for 2 hours, taken out, washed with water, and dried. Tensile load was measured on the fibers of the untreated and treated fibers to compare their strength. Ta.

The average value of the 20 pieces is shown in A'' on the left side of the table below, indicating that the treated portion has much better tensile strength.

Next, take out the other B" group and do the same as above, its =
After immersing a 10 cm end portion, washing with water, drying, etc. as described above, the product was immediately immersed as follows.

In other words, prepare a stainless steel beaker with a capacity of 20Qml,
Take 100 ml of Portland cement supernatant liquid, and place 10 m of one end of the above fiber (already containing 41.0% ZrCl) in it.
, the part treated with an aqueous solution of HfCl41.0%),
After soaking the fibers in this solution, put the beaker in a boiling water bath and keep it at 90°C or higher for 2.5 hours, then remove the fibers from the beaker and wash thoroughly with water.

Confirm the completion of washing by dropping phenol phthalate.

The fibers are then dried in a desiccator for 24 hours.

After drying, the fibers were pulled out one by one from the bundle, and the tensile strength of the treated and untreated portions was tested for 20 fibers from both ends.
The average values are shown in Table B" below, and the results showed that even when immersed in Portland cement supernatant liquid (pH 12-14) at high temperature, the tensile strength did not decrease, but rather increased. .

In the same manner as above, the diameter of the twice-used fiber is 21 to 17μ, 3
The diameter of fibers used twice is 23~17μ, the diameter of fibers used four times is 24~
17μ and 5-time used fibers with diameters of 24.5 to 19μ were also tested, and the results are shown in the following table, showing that the tensile strength was improved in both cases, and even when immersed in Portland cement supernatant, This shows that it can actually rise.

This example shows that the mixing ratio of zirconium chloride (ZrC1s) and hafnium chloride (HfC14) is 2% of the entire mixed solution, and the allocation can be made appropriately.

As described above, the present invention makes it possible to form dense corrosion resistance on the surface of glass fibers using two types of ions with different ionic radii, and improves cement alkali resistance and tensile strength, as well as being highly durable. Good results were obtained.

Claims (1)

[Claims] 1 Soda lime based glass fibers were mixed with 0.5 to 1.5% by weight of zirconium inorganic strong acid salt and hafnium inorganic strong acid salt 1.
Zirconium and A method for making soda-lime glass-based glass fiber cement-alkaline resistant, which is characterized by forming a dense surface of hafnium.