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Preparation technology and application of high performance composite material activated superfine fly ash

A technology of ultra-fine fly ash and composite materials, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of low utilization rate and low added value, and achieve rapid strength growth and strength growth The effect of large amplitude and large increase in late strength

Inactive Publication Date: 2015-02-25
山西和正环保建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fly ash currently used in cement and concrete has not been processed, the added value is low, and the dosage is within 50%, and the utilization rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 10-20% of the present invention into the existing 32.5 cement, mix evenly and carry out the experiment, the strength of the tested cement mortar test block at each age remains basically unchanged, the cement grade remains unchanged, and the cost is reduced by 10-20 yuan / Tons; 10-15% of the present invention is added into the existing production label 42.5 cement, and the experiment is carried out evenly, and the strength of each age of the tested cement mortar test block remains unchanged, the cement label remains unchanged, and the cost is reduced by 15- 30 yuan / ton.

Embodiment 2

[0015] The present invention is externally mixed into pure clinker Portland cement of label 52.5, and mixed uniformly to produce 42.5 and 32.5 cement. Adding 40-50% to the outside and mixing evenly can produce 42.5 cement, and adding 60-70% to the outside can produce 32.5 cement. Compared with ordinary fly ash Portland cement, the cement produced has higher early strength, faster strength growth, good workability, high durability, and larger later strength growth rate, and the cost is 30-60 yuan / ton lower than ordinary composite cement.

Embodiment 3

[0017] The present invention is used in C40 and C30 commercial concrete to replace winnowing ash, slag powder and cement and other cementitious materials, and the replacement dosage is 50-70%. The 28-day strength is 3-6MPa higher than the reference concrete strength, and the cost is reduced. 10-30 yuan / m 3 , its fluidity, slump, workability and other properties are better than the original benchmark concrete.

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Abstract

High performance composite activated superfine fly ash is prepared by adding a small amount of an activator and a grinding assistant agent for grinding together while super fine grinding of secondary or tertiary ash, and can meet the requirement that the ratio of particles with the size less than 10 mu m is more than 95%. 10-20% of the superfine fly ash is added into 32.5 cement, 10-15% of the superfine fly ash is added into 42.5 cement, and after even mixing, the grades of the produced cement are unchanged. The superfine fly ash is added into grade 52.5 pure clinker Portland cement for cement production by even mixing, 40-50% of the superfine fly ash is added for production of 42.5 cement, and 60-70% of the superfine fly ash is added for production of 32.5 cement. By addition of 50-70% of the superfine fly ash into C40 and C30 grade commercial concrete for replacement of winnowing ash, fine ore and cement and other cementitious materials, the strength of 28 days is 3-6MPa higher than reference C40 and C30 concrete strength.

Description

Technical field: [0001] The invention belongs to the technical field of making high-performance composite materials for buildings, and in particular relates to a preparation process and application of activated ultrafine fly ash of high-performance composite materials. Background technique: [0002] my country's power industry is dominated by thermal power generation, of which coal-fired power generation dominates. According to statistics, the coal-fired power stations in the country discharge more than 300 million tons of fly ash annually, and the utilization rate is seriously insufficient. The accumulation of a large amount of fly ash not only occupies a large amount of arable land, but also pollutes the environment. Therefore, the comprehensive utilization of fly ash is related to the sustainable development of my country's electric power industry and related industries. The long-term accumulation of fly ash has caused great damage to the environment. Therefore, for a lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08
CPCY02W30/91
Inventor 王殿勋高贵明马雨明张杰曹克
Owner 山西和正环保建材有限公司
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