JPH09142909A - Production of mortar, production of mortar and concrete and concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mortar excellent in strength, fire resistance, corrosion resistance or the like by incorporating a long carbon fiber in a treating agent prepared by mixing a thickener and a dispersing agent with water to make a slurry and mixing cement, sand and water with the slurry. SOLUTION: The treating agent 2 is prepared by mixing a thickener (e.g. methyl cellulose), a dispersing agent (e.g. Melment(R) F-10 made by SHOWA DENKO Co.) and further preferably an antiseptic (e.g. Iodosol(R) AF3 made by KANEBO.NSC Co.) with water. Next, the treating agent 2 is fed to a vessel 3 in which many long carbon fibers 1 are put to form a state that the long carbon fibers are collected by several fibers and the whole treating agent 2 becomes slurry state 4. Next the slurry state material 4 is mixed with cement, sand, water and the like to uniformly disperse the long carbon fibers 1. Next, the mortar 5, in which the long carbon fibers are uniformly dispersed, is obtained by drying the mixture.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing mortar excellent in strength, fire resistance and corrosion resistance, a method for producing mortar, a method for producing concrete and concrete.

[0002]

2. Description of the Related Art Conventionally, a method of mixing mortar by mixing carbon fiber, glass fiber, synthetic fiber or the like into cement has been practiced. By mixing these fibers, it is possible to increase the strength of the mortar and to manufacture a mortar having excellent fire resistance.

[0003]

Further, the present applicant is conducting research and development of mortar having higher strength and fire resistance than conventional mortar, and while mixing long carbon fiber into cement, the mortar is improved. It has been found that when manufactured, it can be made more excellent in strength, fire resistance and corrosion resistance. However, as a property of long carbon fibers, when many long carbon fibers are put in a container, there is a property that the long carbon fibers are not entangled with each other due to static electricity or the like and cannot be separated. , Since the long carbon fibers expand in a entangled state, it is very difficult to disperse the long carbon fibers uniformly in the mortar when mixed in the cement, and it was difficult to realize it as an actual product. .

Therefore, the present invention provides a method for producing mortar and a mortar having excellent strength, fire resistance, and corrosion resistance by uniformly dispersing long carbon fibers in cement, and a method for producing concrete and concrete. It is the one we are trying to provide.

[0005]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventor has found that long carbon fibers are mixed in a treating agent in which a thickener and a dispersant are mixed in water to form a slurry. The present invention provides a method for producing mortar and a mortar, which are produced by mixing with cement, sand, and water after the state, and provide the present invention.

[0006] Further, after a long carbon fiber is mixed into a treating agent in which a thickener and a dispersant are mixed in water to form a slurry,
Another object of the present invention is to provide a concrete manufacturing method and concrete characterized by being manufactured by mixing with cement, sand, gravel and water.

Further, it is preferable to mix a preservative with the treating agent.

Further, it is preferable to set the compounding ratio to 5 to 15 wt% of water, 0 to 1.0 wt% of thickener, and 0.02 to 2.0 wt% of dispersant.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment in which the mortar of the present invention is embodied will be described.

In order to produce a mortar in which long carbon fibers 1 are uniformly dispersed, a treatment agent 2 in which water is mixed with a thickener, a dispersant and a preservative is necessary.

First, the long carbon fiber 1 used in the present invention is not a powdery carbon fiber but a stick-shaped carbon fiber. Specifically, the width is 5 to 7 .mu.m and the length is 5 to 30 mm.
Means These are entangled to form larger long carbon fibers.

The thickening agent is used for imparting stability to the mortar without separation, and specifically, methyl cellulose, hydroxyethyl cellulose, associative thickening agent, methyl cellulose (Shin-Etsu Chemical Co., Ltd. MC
(90SH4000)) and hydroxyethyl cellulose (Daicel Chemical Industries, Ltd. SP-4000) can be used.

As the dispersant, specifically, Primal 850 manufactured by Romand House Co., Ltd. and Poise 520 manufactured by Kao Corporation can be used.

The preservative is mainly for preventing the thickener from rotting, and specifically (Katayama Chemical Research Laboratory Mornon 1700) and (Takeda Products Co., Ltd. Slaoff 72N) are preferably used. it can. It should be noted that the preservative can serve as the treating agent 2 even if it is not mixed.

The blending ratio of these in the treating agent 2 is as follows: long carbon fiber: 0.1 to 1.0 wt% water: 5 to 10 wt% (maximum 5 to 15 wt%) Thickener: 0.01 to 0.1 wt% (Maximum 0 to 1.0 wt%) Dispersant: 0.01 to 0.1 wt% (Maximum 00.1 to 2.0 wt%) Preservative: It may be in the range of 0.05 to 0.1 wt%.

Then, as shown in FIG. 1 (a), when the treating agent 2 is placed in a container 3 containing a large number of long carbon fibers 1, several long carbon fibers 1 are collected. The entire treating agent becomes a slurry state.

Further, as shown in FIG. 1 (b), a long carbon fiber 1 and a treating agent 2 in slurry form 4, water,
Long carbon fiber 1 by mixing cement and standard sand
Can be uniformly dispersed.

After that, by drying, FIG.
As shown in (c), the mortar 5 in which the long carbon fibers 1 are uniformly dispersed can be manufactured.

Although the above-mentioned example shows a method for producing the mortar 5, in FIG.
In the form of slurry, water, cement, standard sand,
By mixing the gravel, it is possible to manufacture concrete in which the long carbon fibers 1 are uniformly dispersed.

As described above, according to the mortar 5 of this embodiment, a mortar in which long carbon fibers are uniformly dispersed can be manufactured. Therefore, by using this mortar 5, the strength of the mortar 5 is increased by the long carbon fibers that are uniformly dispersed, and the fire resistance and corrosion resistance are excellent.

[0021]

EXAMPLES The weight mixing ratio of mortar containing 0.5 wt% long carbon fiber (when cement is 100) is as follows. (Treatment agent) -Water 7.8-Thickener (methyl cellulose) 2% MC (90SH4000) 0.025-Dispersant Melment F-10 (Showa Denko KK) 0.05-Preservative Yodozol AF3 (Kanebo NES) Sea Co., Ltd.) 10 (0 to 15) -Water 40-Cement 100-Standard sand 300-Long carbon fiber 0.5

In the case of producing a mortar containing 1.0 wt% of long carbon fiber, it can be carried out by doubling each component of the above-mentioned embodiment and adjusting the amount of water.

[0023]

As apparent from the above description, the following operations and effects are obtained. According to the mortar manufacturing method and the mortar of claims 1 and 2, after a long carbon fiber is mixed into a treating agent in which water is mixed with a thickener and a dispersant to form a slurry, cement, sand, By mixing with water to produce, long carbon fibers can be uniformly dispersed. Therefore, the strength of the mortar is increased, the fire resistance is excellent, and the corrosion resistance is high.

Similarly, in the concrete manufacturing method and concrete according to claims 5 and 6, since the long carbon fibers can be uniformly dispersed, the strength of the concrete is increased and the fire resistance is further improved. It has excellent corrosion resistance.

Further, according to the mortar of claim 3 and the concrete of claim 7, since the preservative is mixed, it serves to prevent the thickener from rotting.

Further, according to the mortar of claim 4 and the concrete of claim 8, the mixing ratio in the treating agent is water 6
-8 wt%, thickener 0.01-0.04 wt%, and dispersant 0.01-0.1 wt% can make the dispersion of long carbon fibers more uniform and make it an optimum product. be able to.

[Brief description of the drawings]

FIG. 1 is a process diagram showing a mortar manufacturing method.

[Explanation of symbols]

1 Long carbon fiber 2 Treatment agent 3 Container 5 Mortar

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Claims (8)

[Claims] 1. A method for producing a mortar, which comprises mixing long carbon fibers into a treatment agent prepared by mixing a thickener and a dispersant with water to prepare a slurry state, and then mixing it with cement, sand and water. . 2. A mortar produced by mixing long carbon fibers into a treatment agent in which a thickener and a dispersant are mixed in water to form a slurry, and then mixing the mixture with cement, sand and water. . 3. The mortar according to claim 2, further comprising a preservative mixed with the treating agent. 4. A compounding ratio of 5 to 15 wt% water and 0 thickener.
The mortar of Claim 2 or 3 which was set to -1.0 wt% and the dispersant 0.02-2.0 wt%. 5. A concrete composition, characterized in that a long carbon fiber is mixed into a treating agent prepared by mixing a thickener and a dispersant with water to form a slurry, and then mixed with cement, sand, gravel and water. Production method. 6. A treatment agent in which a thickener and a dispersant are mixed in water, mixed with long carbon fibers to form a slurry, and then mixed with cement, sand, gravel, and water for production. Concrete to do. 7. The concrete according to claim 6, further comprising a preservative mixed with the treating agent. 8. A compounding ratio of 5 to 15 wt% of water and 0 of a thickener.
The concrete according to claim 6 or 7, wherein the content is set to 1.0 wt% and the dispersant is set to 0.02 to 2.0 wt%.