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A kind of preparation method of cement mortar additive for new block wall

A technology for cement mortar and additives, applied in the field of cement mortar additives, can solve the problems of reducing the strength of the mortar, increasing the production cost, increasing the amount of cement, etc., and achieves the effects of increasing the content of soluble silicon, improving the degree of dispersion, and promoting modification.

Active Publication Date: 2021-11-16
ZHEJIANG FANGYUAN BUILDING MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the water-retaining and thickening materials commonly used in cement mortar are mainly cellulose ether. While water-retaining and thickening improves the workability of mortar, cellulose ether will greatly reduce the strength of mortar. In order to ensure the strength of mortar, only cement mortar can be added. Medium cement consumption increases production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method for a cement mortar additive for a novel block wall, the preparation method comprising the following steps:

[0033] S1, preparation of modified chitosan solution:

[0034]Weigh 1 kg of malic acid, 1 kg of N-hydroxysuccinimine, and 2 kg of chitosan, and add 1% acetic acid dropwise to chitosan under a magnetic stirring condition of 525 r / min until chitosan is completely dissolved, and add to a scale Add 1 mg / mL of 3-ethylcarbodiimide solution to the N-hydroxysuccinimide taken, and magnetically stir at a speed of 500r / min until the N-hydroxysuccinimine is completely dissolved, then weigh the malic acid and Mix chitosan solution and N-hydroxysuccinimine solution, continue to stir evenly with a rotating speed of 525r / min, adjust the pH to 6.25, then add 0.4kg of silane coupling agent, oscillate and disperse for 9min under 190W ultrasonic waves, and get a change Chitosan solution;

[0035] S2, preparation of modified diatomite:

[0036] Weigh 3kg of d...

Embodiment 2

[0040] A preparation method for a cement mortar additive for a novel block wall, the preparation method comprising the following steps:

[0041] S1, preparation of modified chitosan solution:

[0042] Weigh 1 kg of malic acid, 1 kg of N-hydroxysuccinimine, and 2 kg of chitosan, and add 1% acetic acid dropwise to chitosan under a magnetic stirring condition of 500 r / min until chitosan is completely dissolved, and add to a scale Add 1 mg / mL of 3-ethylcarbodiimide solution to the N-hydroxysuccinimide taken, and magnetically stir at a speed of 500r / min until the N-hydroxysuccinimine is completely dissolved, then add malic acid and chitosan Solution and N-hydroxysuccinimide solution were mixed, continued to stir evenly with a rotating speed of 500r / min, adjusted the pH to 6.0, then added 0.4kg of silane coupling agent, oscillated and dispersed under 180W ultrasonic waves for 8min, and obtained modified chitosan sugar solution;

[0043] S2, preparation of modified diatomite:

[0...

Embodiment 3

[0048] A preparation method for a cement mortar additive for a novel block wall, the preparation method comprising the following steps:

[0049] S1, preparation of modified chitosan solution:

[0050] Take by weighing 1kg, N-hydroxysuccinimine 1kg, and chitosan 2kg, add 1% acetic acid dropwise to chitosan under the magnetic stirring condition of 550r / min until chitosan is completely dissolved, and add to the weighed N Add 1mg / mL 3-ethylcarbodiimide solution to -hydroxysuccinimide, stir magnetically at a speed of 550r / min until N-hydroxysuccinimide is completely dissolved, then weigh the malic acid and chitosan Solution and N-hydroxysuccinimide solution were mixed, continued to stir evenly with a rotating speed of 550r / min, adjusted the pH to 6.5, then added 0.4kg of silane coupling agent, oscillated and dispersed under 200W ultrasonic waves for 10min, and obtained modified chitosan solution;

[0051] S2, preparation of modified diatomite:

[0052] Weigh 3kg of diatomite, 1k...

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PUM

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Abstract

The present invention relates to a kind of preparation method that is used for the cement mortar additive of novel block wall, comprises the following steps: S1, in the chitosan that weighs, add 1% acetic acid dropwise to dissolve completely, add N- Add 1 mg / mL of 3-ethylcarbodiimide solution to hydroxysuccinimide until completely dissolved, mix malic acid with chitosan solution and N-hydroxysuccinimide solution to obtain modified chitosan solution; S2 1. Weigh deionized water, divide it into two parts of equal mass A and B, mix diatomaceous earth with deionized water A, add nano-titanium dioxide, deionized water B and organic amine under constant temperature stirring conditions, dehydrate and dry after mixing, Obtain modified diatomite; S3, ultrasonically disperse the modified chitosan solution and modified diatomite at 60°C for 8‑10min, add mica powder, hydroxyethylmethylcellulose, lignin, hard Fatty acid, fly ash, mixed, dried, crushed, that is. The cement mortar additive obtained in the invention is beneficial to increase the compactness of cement, so that the strength of cement increases.

Description

technical field [0001] The invention relates to the technical field of cement mortar additives, in particular to a preparation method for cement mortar additives used in new block walls. Background technique [0002] The new block wall is a new type of wall masonry material made of cement as the main bonding material, mainly including lime sand bricks, autoclaved aerated concrete blocks, hollow blocks, concrete hollow bricks, etc. The new block wall has high requirements on the workability, cohesiveness and water retention of the mortar. At present, the dry construction method is usually used, and the mortar is directly added to the dry block without spraying on the block. Water is used to improve the bonding performance of mortar, which requires the bonding force of mortar to meet the construction requirements. [0003] Cement mortar is a widely used building material, mainly used for the masonry of masonry structures and the plastering of internal and external walls of bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/04C04B24/121C04B24/38C04B14/08C04B14/305C04B14/20C04B18/26C04B24/383C04B18/08
Inventor 杨晓华苏君辉陈倩倩余焘钟林谚
Owner ZHEJIANG FANGYUAN BUILDING MATERIALS TECH