Recycled concrete with high interface bonding performance and preparation method thereof

A technology of recycled concrete and interface bonding, applied in the field of building materials, can solve the problems of low elastic modulus, high water absorption, poor bonding performance between coarse aggregate and mortar interface, etc. The effect of improving crack resistance and durability, promoting further development

Pending Publication Date: 2021-03-19
HEFEI CEMENT RES DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of recycled concrete with high interfacial bonding performance and its preparation method, which is used to solve the problems caused by the low density, large crushing value, high porosity and water absorption of recycled coarse aggregate in ordinary recycled concrete. The disadvantages of recycled concrete are low strength, low elastic modulus, poor crack resistance and poor durability caused by the defects of high ratio and poor interface bonding performance between coarse aggregate and mortar.

Method used

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  • Recycled concrete with high interface bonding performance and preparation method thereof
  • Recycled concrete with high interface bonding performance and preparation method thereof
  • Recycled concrete with high interface bonding performance and preparation method thereof

Examples

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example 1

[0038] A preparation method of recycled concrete with high interfacial bonding performance, 190 parts of water, 223.5 parts of cement, 665 parts of sand, 108 parts of a styrene / acrylic polymer latex, and a styrene / acrylate polymer latex 1290.9 parts of regenerated coarse aggregate, 11.2 parts of silica fume, 33.5 parts of fly ash, and 22.4 parts of mineral powder strengthened by latex soaking method. The cement used is Conch brand 52.5 ordinary Portland cement, the sand is standard medium sand, and the water is Tap water is available for drinking, and the mortar is 10% of the amount of cement mass mixed with polymer. The above-mentioned preparation method of recycled concrete with high interfacial bonding performance comprises the following steps: step 1) rinsing the forced mixer without obvious water accumulation; step 2) weighing a certain amount of each component according to the established mixing ratio Put the materials into the forced mixer in turn (all the components ex...

example 2

[0040] A preparation method of recycled concrete with high interfacial bonding performance, 200 parts of water, 363.6 parts of cement, 600 parts of sand, 116 parts of a styrene / acrylate polymer latex, and 116 parts of a styrene / acrylate polymer latex 1164.7 parts of regenerated coarse aggregate, 18.2 parts of silica fume, 54.5 parts of fly ash, and 36.4 parts of mineral powder strengthened by latex soaking method. The cement used is Conch brand 52.5 ordinary Portland cement, the sand is standard medium sand, and the water is Tap water is available for drinking, and the mortar is 10% of the amount of cement mass mixed with polymer. The above-mentioned preparation method of recycled concrete with high interfacial bonding performance comprises the following steps: step 1) rinsing the forced mixer without obvious water accumulation; step 2) weighing a certain amount of each component according to the established mixing ratio Put the materials into the forced mixer in turn (all the...

example 3

[0042] A preparation method of recycled concrete with high interface bonding performance, 210 parts of water, 608.7 parts of cement, 405 parts of sand, 122 parts of styrene / acrylate polymer latex, a kind of styrene / acrylate polymer 991.6 parts of regenerated coarse aggregate strengthened by latex soaking method, 30.4 parts of silica fume, 91.3 parts of fly ash, 60.9 parts of mineral powder, 15.2 parts of water reducing agent, of which the cement used is Conch brand 52.5 ordinary Portland cement, and sand is the standard The medium sand, the water is drinking tap water, and the mortar is a polymer mixed with an amount of 10% of the cement mass. The above-mentioned preparation method of recycled concrete with high interfacial bonding performance comprises the following steps: step 1) rinsing the forced mixer without obvious water accumulation; step 2) weighing a certain amount of each component according to the established mixing ratio Put the materials into the forced mixer in ...

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Abstract

The invention discloses recycled concrete with high interface bonding performance and a preparation method thereof. The recycled concrete comprises the following components in parts: 190-210 parts ofwater, 223.5-608.7 parts of cement, 405-665 parts of sand, 991.6-1290.9 parts of reinforced recycled coarse aggregate, 11.2-30.4 parts of silica fume, 33.5-91.3 parts of fly ash, 22.4-60.9 parts of mineral powder and 0-15.2 parts of water reducer. The invention disadvantages of low strength, low elasticity modulus, poor crack resistance, poor durability and the like of recycled concrete caused bythe defects of low density, high crushing value, high porosity, high water absorption rate and poor interface bonding performance of coarse aggregate and mortar in common recycled concrete. Therefore,the recycling of the waste concrete generated by dismantling the old building is realized, and the recycled concrete has great significance for saving resources and protecting the ecological environment.

Description

Technical field: [0001] The invention relates to the field of building materials, in particular to recycled concrete with high interfacial bonding performance. Background technique: [0002] Concrete is a major building material. The waste concrete produced by the demolition of old buildings in my country is about 13.6 million tons every year. In order to reduce the adverse effects of construction waste concrete on the natural environment, it is extremely necessary to make waste concrete into recycled concrete. [0003] At the same time, compared with natural aggregate, recycled coarse aggregate has defects such as low density, high porosity and high water absorption, which limit its application in practical engineering. [0004] The interface between recycled coarse aggregate and cement mortar is the weakest point in recycled concrete, and the compressive strength of recycled concrete depends on the interface properties between recycled coarse aggregate and cement mortar. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B14/06C04B18/08C04B18/146C04B18/141C04B24/283C04B18/167
Inventor 洪丽李明明苏文洋詹炳根叶卫东倪明星
Owner HEFEI CEMENT RES DESIGN INST
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