Pump concrete doped with low-quality recycled micropowder and low-quality recycled aggregate

A technology for pumping concrete and regenerated micropowder, which is applied in the field of construction waste recycling and building material waste utilization. It can solve the problems of construction waste being piled up everywhere, discarded, and occupying land, and achieves reduced water absorption, excellent mechanical properties and durability. , easy pumping effect

Active Publication Date: 2015-01-07
北京东方建宇混凝土科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for brick recycled aggregate and brick recycled fine powder, because its particles are weaker, its water absorption rate is significantly higher than that of cement stone recycled aggregate and cement stone recycled fine powder, and its activity is low, i

Method used

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  • Pump concrete doped with low-quality recycled micropowder and low-quality recycled aggregate
  • Pump concrete doped with low-quality recycled micropowder and low-quality recycled aggregate
  • Pump concrete doped with low-quality recycled micropowder and low-quality recycled aggregate

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Experimental program
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Effect test

Embodiment 1

[0061] The pumped concrete described in this embodiment is calculated by pumping concrete per cubic meter, and consists of the following quality raw materials: 132kg of cement, 28kg of low-quality recycled micropowder, 55kg of mineral powder, 65kg of fly ash, 990kg of mixed fine aggregate, and 990kg of mixed coarse aggregate. 900kg of aggregate, 3.64kg of composite pumping agent, and 179kg of water; wherein, the mixed fine aggregate is composed of low-quality recycled fine aggregate and ordinary fine aggregate, and the brick content of the low-quality recycled fine aggregate is 20wt% , the low-quality recycled fine aggregate accounts for 40wt% of the total mass of the mixed fine aggregate, the mixed coarse aggregate is composed of low-quality recycled coarse aggregate and ordinary coarse aggregate, and the low-quality recycled coarse aggregate is used in bricks The content is 20wt%, and the low-quality recycled coarse aggregate accounts for 60wt% of the total mass of the mixed ...

Embodiment 2

[0063] The pumped concrete described in this embodiment is calculated by pumping concrete per cubic meter, and consists of the following quality raw materials: 178kg of cement, 23kg of low-quality recycled micropowder, 60kg of mineral powder, 68kg of fly ash, 910kg of mixed fine aggregate, and 910kg of mixed coarse aggregate. 930kg of aggregate, 1.8kg of composite pumping agent, and 175kg of water; wherein, the mixed fine aggregate is composed of low-quality recycled fine aggregate and ordinary fine aggregate, and the brick content of the low-quality recycled fine aggregate is 40wt% , the low-quality recycled fine aggregate accounts for 30wt% of the total mass of the mixed fine aggregate, the mixed coarse aggregate is composed of low-quality recycled coarse aggregate and ordinary coarse aggregate, and the low-quality recycled coarse aggregate is used in bricks The content is 40wt%, and the low-quality recycled coarse aggregate accounts for 50wt% of the total mass of the mixed c...

Embodiment 3

[0065] The pumped concrete described in this embodiment is calculated by pumping concrete per cubic meter, and consists of the following quality raw materials: 197kg of cement, 17kg of low-quality recycled micropowder, 62kg of mineral powder, 70kg of fly ash, 884kg of mixed fine aggregate, and 884kg of mixed coarse aggregate. Aggregate 958kg, compound pumping agent 4.84kg, water 169kg; Wherein, wherein, described mixed fine aggregate is made up of low-quality recycled fine aggregate and ordinary fine aggregate, and the brick content of described low-quality recycled fine aggregate is 50wt%, the low-quality recycled fine aggregate accounts for 20wt% of the total mass of the mixed fine aggregate, the mixed coarse aggregate is composed of low-quality recycled coarse aggregate and ordinary coarse aggregate, and the low-quality recycled coarse aggregate The medium brick content is 50wt%, the low-quality recycled coarse aggregate accounts for 40wt% of the total mass of the mixed coar...

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Abstract

The invention provides pump concrete doped with low-quality recycled micropowder and low-quality recycled aggregate, and belongs to the field of building materials. The pump concrete is composed of the following raw materials including cement, the low-quality recycled micropowder, slag powder, fly ash, mixed fine aggregate, mixed coarse aggregate, a compound pumping agent and water, wherein the mixed fine aggregate is composed of low-quality recycled fine aggregate and common fine aggregate; the mixed coarse aggregate is composed of low-quality recycled coarse aggregate and common coarse aggregate; and the compound pumping agent comprises a salt of sulfonated polystyrene-acrylic acid copolymer and a salt. The pump concrete has the characteristics of good work performance and excellent mechanical properties and durability, and can be pumped easily.

Description

technical field [0001] The invention relates to a pumping concrete, in particular to a pumping concrete mixed with low-quality recycled micropowder and low-quality recycled aggregate, and belongs to the field of construction waste recycling and building materials recycling. Background technique [0002] With the rapid development of the construction industry, the demand for sand and gravel resources is also increasing, which requires a lot of quarrying and sand washing, which seriously damages the natural and vegetation environment. In recent years, high-quality sand and gravel resources have been exhausted in many areas of our country, and we must rely on purchasing methods from surrounding areas or long-distance transportation, which increases construction costs. At the same time, the discharge of construction waste is increasing day by day. According to rough statistics on the loss of building construction materials such as brick-concrete structures, cast-in-place struct...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/16C04B24/20
CPCY02W30/91
Inventor 段遵莉武俊宇王安岭赵玉芳韦宏健章伟伟
Owner 北京东方建宇混凝土科学技术研究院有限公司
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