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Attapulgite and cement composite additive and preparation method

A compound additive and attapulgite technology, applied in the field of attapulgite, can solve problems such as performance defects of cement concrete and cement mortar, poor durability of cement concrete, and large coefficient of thermal expansion and contraction of cement, so as to avoid building infirmity and good quality. Waterproof and mechanical properties, low cost effect

Inactive Publication Date: 2017-07-21
安徽省明美矿物化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The durability of cement concrete is not good, the thermal expansion and contraction coefficient of cement is very large, it is easy to crack and weather; the cement has poor high temperature resistance, and it is easy to burst;
[0004] 2. The water resistance of cement mortar is very poor. The reason is that 30% of the cement is not used, and the utilization rate of cement is only about 67% to 70%. Poor density, bleeding, easy delamination
[0005] 3. Cement is an alkaline material. If the amount is too large, it will cause serious pollution to groundwater after solidification
[0006] The above defects are all due to the defects of the cement product itself, which inevitably lead to the performance defects of cement concrete and cement mortar, and the above problems cannot be solved only by changing its own performance.

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  • Attapulgite and cement composite additive and preparation method

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Effect test

Embodiment 1

[0029] An attapulgite cement composite additive and a preparation method according to a preferred embodiment of the present invention;

[0030] The attapulgite cement composite additive is prepared from the following components by weight: 85 parts of modified attapulgite clay, 12 parts of diatomite, 17 parts of fly ash, 6 parts of slag, and 8 parts of bentonite , 6 parts of sodium silicate, 12 parts of limestone, 0.8 parts of polyacrylamide, and 0.2 parts of graphene.

[0031] The preparation method of the attapulgite cement composite additive of the present invention comprises the following steps:

[0032] (1) Pulverize the natural attapulgite clay to 150 mesh, add water 8 times the weight of the attapulgite clay, stir to form a suspended slurry, and then sonicate for 18 minutes under ultrasonic conditions, take the upper layer of the suspension liquid at 3000 rpm / Centrifuge for 10 min in a centrifuge for 1 min, and vacuum filtration to obtain a filter cake; place the filte...

Embodiment 2

[0039] An attapulgite cement composite additive and a preparation method according to a preferred embodiment of the present invention;

[0040] The attapulgite cement composite additive is prepared from the following components in parts by weight: 80 parts of modified attapulgite clay, 10 parts of diatomite, 10 parts of fly ash, 5 parts of slag, and 5 parts of bentonite , 3 parts of sodium silicate, 5 parts of limestone, 0.5 part of polyacrylamide, and 0.1 part of graphene.

[0041] The preparation method of the attapulgite cement composite additive of the present invention comprises the following steps:

[0042](1) Pulverize the natural attapulgite clay to 100 mesh, add water 5 times the weight of the attapulgite clay, stir to form a suspended slurry, and then sonicate for 10 minutes under ultrasonic conditions, take the upper layer of the suspension liquid at 2500 rpm / Centrifuge for 10 min in a centrifuge for 10 min, and vacuum filtration to obtain a filter cake; place the...

Embodiment 3

[0049] An attapulgite cement composite additive and a preparation method according to a preferred embodiment of the present invention;

[0050] The attapulgite cement composite additive is prepared from the following components in parts by weight: 100 parts of modified attapulgite clay, 15 parts of diatomite, 20 parts of fly ash, 10 parts of slag, and 10 parts of bentonite , 10 parts of sodium silicate, 15 parts of limestone, 2 parts of polyacrylamide, and 0.5 parts of graphene.

[0051] The preparation method of the attapulgite cement composite additive of the present invention comprises the following steps:

[0052] (1) Pulverize the natural attapulgite clay to 150 mesh, add 10 times the weight of the attapulgite clay, stir to form a suspended slurry, and then sonicate for 20 minutes under ultrasonic conditions, take the upper layer of the suspension at 3000 rpm / Centrifuge for 10 min in a centrifuge for 10 min, and vacuum filtration to obtain a filter cake; place the filte...

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Abstract

The invention discloses an attapulgite and cement composite additive and a preparation method. The additive is prepared from modified attapulgite clay, diatomite, fly ash, slag, bentonite, sodium silicate, limestone, polyacrylamide and graphene. The preparation method comprises the steps that firstly, natural attapulgite clay is purified and then is subjected to modification treatment, then the modified attapulgite clay performs mixing reaction with the modified mixture of the graphene and the polyacrylamide, the residual components are evenly mixed with the reaction mixture after reaction is completed, and the cement composite additive is obtained after drying. The attapulgite and cement composite additive can effectively improve the cement performance, and the waterproof, moisture-proof, crack resisting and anti-penetrability properties of the cement are greatly improved. In addition, the preparation method is simple and easy to operate, the conditions are mild, and the attapulgite and cement composite additive is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of attapulgite, in particular to an attapulgite cement composite additive and a preparation method. Background technique [0002] Cement is a basic building material with a wide range of applications. Its main uses include masonry, plastering, tiling, making cement bricks, cement concrete, cement products, etc. The problem of the performance defects of cement products itself is also a problem that technicians in this industry are working on. Explore the puzzle. In the prior art, the waterproof function of cement is enhanced by adding external additives to the cement, such as combining glue products with cement to solve the waterproof problem. If it is broken, this function cannot repair it, and an irreparable defect occurs. All in all, a common problem of all types of waterproofing agents on the market is that they do not improve the waterproofing function of cement concrete and cement mortar against the p...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B28/04
CPCC04B40/0042C04B28/04C04B2111/00293C04B2111/27C04B2201/50C04B2201/52C04B14/102C04B14/08C04B18/08C04B18/142C04B14/104C04B22/00C04B22/10C04B24/2652C04B22/02
Inventor 扈卫珍周慧堂刘玉梅石娟
Owner 安徽省明美矿物化工有限公司