Large-water-absorption-rate aggregate surface treatment agent

A technology of surface treatment agent and water absorption rate, which is applied in the field of high-performance concrete, and can solve the problems of reduced bonding force of cement paste and reduced water absorption rate of aggregates, etc.

Active Publication Date: 2016-09-21
CHINA ROAD & BRIDGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technical measures have more or less disadvantages in the actual processing of aggregates with high water absorption rate. Although the film formation on the surface of polymer can greatly reduce the water absorption rate of agg

Method used

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  • Large-water-absorption-rate aggregate surface treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mix 20g of silica fume, 20g of limestone powder, 20g of superfine fly ash, 15g of silane, 15g of polyvinyl alcohol, 5g of waterproof alloy powder, and 2g of polycarboxylate superplasticizer to make a large water absorption Aggregate surface treatment agent, add 100g of water to make a treatment agent slurry, soak 1000g of high water absorption aggregate, take out the soaked aggregate, dry it naturally, test its saturated surface dry water absorption, record it as L 1 .

Embodiment 2

[0045] Mix 10g of silica fume, 30g of limestone powder, 30g of superfine fly ash, 10g of silane, 10g of polyvinyl alcohol, 5g of waterproof alloy powder, and 5g of polycarboxylate superplasticizer to make a large water absorption rate Aggregate surface treatment agent, add 100g of water to make a treatment agent slurry, soak 1000g of high water absorption aggregate, take out the soaked aggregate, dry it naturally, test its saturated surface dry water absorption, record it as L 2 .

Embodiment 3

[0047]Mix 29g of silica fume, 10g of limestone powder, 10g of superfine fly ash, 10g of silane, 20g of polyvinyl alcohol, 10g of waterproof alloy powder, and 1g of polycarboxylate superplasticizer to make a large water absorption Aggregate surface treatment agent, add 100g of water to make a treatment agent slurry, soak 1000g of aggregate with high water absorption rate, take out the soaked aggregate and dry it naturally, test its saturated surface dry water absorption rate, record it as L 3 .

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Abstract

The invention relates to a large-water-absorption-rate aggregate surface treatment agent, and belongs to the technical field of high performance concrete; the surface treatment agent is composed of the components by the weight percentage: 10-30% of silica fume, 10-30% of a limestone powder, 10-30% of ultra-fine fly ash, 10-20% of silane, 10-20% of polyvinyl alcohol, 5-10% of a waterproof alloy powder, and 1-5% of a polycarboxylate water reducing agent. The large-water-absorption-rate aggregate surface treatment agent is easy to use; while the water absorption rate of a large-water-absorption-rate aggregate is reduced, the combination of the aggregate and a cement paste in concrete is not affected, the performance of the large-water-absorption-rate aggregate is improved, and the application of the large-water-absorption-rate aggregate is promoted.

Description

technical field [0001] The invention relates to an aggregate surface treatment agent, in particular to an aggregate surface treatment agent with high water absorption rate, and belongs to the technical field of high-performance concrete. Background technique [0002] With the construction of domestic civil engineering, water conservancy, transportation and other infrastructure and the promotion of the national "Belt and Road" strategy, the consumption of concrete, the largest civil engineering material, has reached 5 billion cubic meters worldwide, and aggregate accounts for more than 70% of the weight of concrete. The amount of aggregate is increasing, and some places have to use aggregate with higher water absorption. [0003] As the water absorption rate of aggregate increases, the compressive strength and flexural strength of concrete become lower, and the frost resistance, impermeability, salt freeze erosion resistance, and carbonation resistance performance become wors...

Claims

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Application Information

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IPC IPC(8): C04B20/10
CPCC04B20/1062C04B20/10C04B20/107C04B20/1051C04B20/1033C04B20/1029
Inventor 夏京亮胡钊光周永祥熊仕伶李连友王晶杨小刚王永海李康雷瑜
Owner CHINA ROAD & BRIDGE
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