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Preparation method of micro-nano porous impermeable crack-resistance concrete additive

A concrete admixture, micro-nano technology, applied in the field of building waterproofing, can solve the problems of increased material cost and labor cost, loss of waterproof function, low construction efficiency, etc., and achieve the effect of saving construction time, improving work efficiency, and wide application fields

Inactive Publication Date: 2019-11-01
广西北海市圣峰建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, osmotic crystalline waterproofing is very sensitive to structural vibrations, temperature changes, and humidity changes. Once destructive vibrations or abnormal changes in temperature and humidity occur, the overall crystalline channel will be destroyed, forming a new water passage, and completely losing the waterproof function.
[0013] 3. Once the interface of the membrane construction is not handled properly, granular bumps appear, which is fatal to the waterproof membrane. Once a small hole leaks, the overall waterproofing will fail
[0014] 4. Multi-step waterproofing construction will increase the material cost and labor cost. Moreover, because each layer of waterproofing has corresponding construction requirements, the time period is long and the construction efficiency is low.

Method used

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  • Preparation method of micro-nano porous impermeable crack-resistance concrete additive
  • Preparation method of micro-nano porous impermeable crack-resistance concrete additive
  • Preparation method of micro-nano porous impermeable crack-resistance concrete additive

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Experimental program
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Effect test

Embodiment 1

[0040] S1. Preparation of polycarboxylate water reducer: first, put the weighed 23% polycarboxylate water reducer mother liquid into the enamel reaction kettle, and then turn on the stirring equipment to stir, so that the stirring blade is kept at 60r / min, stirring for 1.5 h, the reduction ratio of the mixing reducer is 23 times, and the molecular weight of the polycarboxylate superplasticizer mother liquor is 2400;

[0041] S2. Mixing of raw materials: after the stirring is started, 0.007% high molecular weight polymer, 2.5% sodium gluconate, 0.7% sodium aluminate, 0.3% latex powder and 0.035% cellulose are put into the corresponding weight ratio in sequence, each raw material The feeding time interval is 2.5min, and the stirring is continued;

[0042] S3, mixing of additives: After all the raw materials in step S2 are put in, continue to stir for 13 minutes, then put in 0.01% defoamer, and then put in 0.035% air-entraining agent after 5 minutes;

[0043] S4. Preparation of ...

Embodiment 2

[0045] S1. Preparation of polycarboxylate superplasticizer: first put the weighed 20% polycarboxylate superplasticizer mother liquor into the enamel reaction kettle, and then turn on the stirring equipment to stir so that the stirring blade keeps 60r / min, and stir for 1h , the reduction ratio of the stirring reducer is 23 times, and the molecular weight of the polycarboxylate superplasticizer mother liquor is 2400;

[0046] S2. Mixing of raw materials: after the stirring is started, 0.005% high molecular weight polymer, 2% sodium gluconate, 0.5% sodium aluminate, 0.2% latex powder and 0.02% cellulose are put into the corresponding weight ratio in turn, each raw material The feeding time interval is 2 minutes, and the stirring is continued;

[0047] S3, mixing of additives: After all the raw materials in step S2 are put in, continue to stir for 10 minutes, then put in 0.005% defoamer, and then put in 0.03% air-entraining agent after 5 minutes;

[0048] S4. Preparation of finis...

Embodiment 3

[0050] S1. Preparation of polycarboxylate superplasticizer: first put the weighed 25% polycarboxylate superplasticizer mother liquor into the enamel reaction kettle, and then turn on the stirring equipment to stir so that the stirring blade keeps 60r / min and stir for 2h , the reduction ratio of the stirring reducer is 23 times, and the molecular weight of the polycarboxylate superplasticizer mother liquor is 2400;

[0051] S2. Mixing of raw materials: after the stirring is started, 0.01% high molecular polymer, 3% sodium gluconate, 1% sodium aluminate, 0.5% latex powder and 0.05% cellulose are put in the corresponding parts by weight in sequence, each raw material The feeding time interval is 3 minutes, and the stirring is continued;

[0052] S3, mixing of additives: After all the raw materials in step S2 are put in, continue to stir for 15 minutes, then put in 0.01% defoamer, and then put in 0.04% air-entraining agent after 5 minutes;

[0053] S4. Preparation of finished pro...

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Abstract

The invention discloses a preparation method of a micro-nano porous impermeable crack-resistance concrete additive, and belongs to the technical field of building water resistance. The preparation method comprises following steps: 1, preparation of a polycarboxylic acid water reducer; 2, raw material mixing; 3, additive mixing; and 4, finished product preparation. According to the preparation method, combined water resistance is replaced by concrete structure type water resistance, water-proof material cost is reduced greatly, multi-layer water-proof construction process is avoided, so that construction time is shortened, construction working efficiency is increased greatly, artificial construction steps are reduced greatly, artificial cost is reduced, and artificial construction imbalancehidden trouble is avoided; a concrete self water-proof system is adopted, so that water resistance lasting period is as long as building service life, in the prior art, maintenance cost is extremelyhigh because of leakage caused by various factors in water proof construction, while almost no daily maintenance is needed in the invented technology.

Description

technical field [0001] The invention relates to the technical field of building waterproofing, in particular to a preparation method of a micro-nano porous anti-seepage and anti-crack concrete admixture. Background technique [0002] At present, the domestic building waterproofing system is mainly divided into two major systems: rigid waterproofing and flexible waterproofing. The rigid waterproofing system is mainly self-waterproofing of concrete structures: impermeable concrete, cement-based permeable crystalline waterproofing coating and waterproofing mortar. Flexible waterproofing is mainly : Waterproof membranes, polyurethane coatings and acrylic coatings, while impermeable concrete is an important system for rigid waterproofing. Impermeable concrete refers to concrete with an impermeability grade ≧ P6. The common method is to use air-entraining admixtures. Create disconnected air bubbles inside the concrete, cut off the capillary channels, change the pore structure, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B2103/302C04B22/004C04B24/383C04B2103/0057C04B24/10C04B22/0093C04B2103/50C04B2103/304C04B2103/0045
Inventor 王纯强
Owner 广西北海市圣峰建材科技有限公司
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