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Low autogenous shrinkage, high-strength concrete prepared from waste pulp in concrete-mixing station

A high-strength concrete and mixing plant technology, applied in the field of building materials, to achieve the effect of reducing self-shrinkage

Active Publication Date: 2017-01-11
上林县林燃建工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution to this problem has not been reported in the concrete prepared from the waste slurry of the existing concrete mixing plant

Method used

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  • Low autogenous shrinkage, high-strength concrete prepared from waste pulp in concrete-mixing station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Calculated by weight components, including 340 parts of cement, 130 parts of lithium slag, 110 parts of waste slurry from concrete mixing plant, 696 parts of river sand, 1044 parts of gravel, 10 parts of shrinkage reducing agent, 6 parts of water reducing agent and 80 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.

[0028] The compressive strength of high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 81.5MPa, and the autogenous shrinkage at different ages is shown in Table 1.

Embodiment 2

[0030] Calculated by weight components, including 330 parts of cement, 100 parts of lithium slag, 100 parts of waste slurry from concrete mixing plant, 714 parts of river sand, 1071 parts of gravel, 9 parts of shrinkage reducing agent, 5 parts of water reducing agent and 85 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.

[0031] The compressive strength of high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 74.7MPa, and the autogenous shrinkage at different ages is shown in Table 1.

Embodiment 3

[0033] Calculated by weight components, including 300 parts of cement, 90 parts of lithium slag, 70 parts of waste slurry from concrete mixing plant, 739 parts of river sand, 1109 parts of gravel, 8.5 parts of shrinkage reducing agent, 4 parts of water reducing agent and 92 parts of water, mixed Composition, one day after the formwork is removed, the shrinkage reducer solution is applied externally.

[0034] The compressive strength of the high-strength concrete prepared from the waste slurry of the 28-day concrete mixing plant is 62.2 MPa. The autogenous shrinkage of different ages is shown in Table 1. Table 1 shows the autogenous shrinkage values ​​of the low autogenous high-strength concrete prepared from the waste slurry of the concrete mixing plant at different ages ( ×10 -6 )

[0035]

[0036] Table 1.

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Abstract

Provided is low autogenous shrinkage, high-strength concrete prepared from the waste pulp in concrete-mixing station. The concrete is a blended composition of 300-340 parts of cement, 90-130 parts of lithium slag, 70-110 parts of waste pulp from a concrete-mixing station, 696-739 parts of river sand, 1044-1109 parts of crushed stone, 8.5-10 parts of shrinkage reducing agent, 4-6 parts of water reducing agent and 80-92 parts of water. The 7d autogenous shrinkage value of the low autogenous shrinkage, high-strength concrete prepared from the waste pulp in concrete-mixing station, is <=80*10<-6>, the 28d autogenous shrinkage value is <=100*10<-6>, approaching stability. The lithium slag and shrinkage-reducing agent compositions adopted by present invention is good for lowering autogenous shrinkage; the compatibility with waste pulp is good. The roles and functions are different and achieve superposition effects, effectively lowering the autogenous shrinkage of high-strength concrete prepared from the waste pulp in concrete-mixing station.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to low self-shrinkage high-strength concrete (C60 and above), which can effectively reduce the self-shrinkage of high-strength concrete prepared by using waste slurry from a concrete mixing station. Background technique [0002] Concrete is still the building material with the largest amount of use and the widest range of applications. It is mainly prepared and produced for concrete mixing plants, which will inevitably produce a large amount of waste water, waste slurry and waste residue. According to statistics, with the continuous expansion of the scale of infrastructure construction, the annual output of concrete in my country has exceeded 1.5 billion m 3 , and every 1m produced 3 Concrete produces an average of 0.03 tons of waste water, which means that my country's commercial concrete mixing plants will produce about 50 million tons of waste water every year. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04
CPCC04B28/00C04B28/04C04B2111/34C04B2201/50C04B18/141C04B18/0418C04B14/06C04B14/02C04B2103/302
Inventor 杜时贵何智海雍睿黄曼刘闯
Owner 上林县林燃建工材料有限公司
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