Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Recycled aggregate concrete and preparation method thereof

A technology of recycled aggregate and concrete, applied in the field of building materials, can solve the problems of difficult control of concrete slump, decreased durability, high porosity, etc. Effect

Inactive Publication Date: 2016-07-27
南京汪海混凝土有限公司
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with natural stone aggregate, recycled aggregate has the following disadvantages: high porosity, high water absorption, and low crushing index
Therefore, when the recycled aggregate is used to make concrete, it will bring the weaknesses of concrete slump, low strength, decreased elastic modulus, high drying shrinkage and creep, and decreased durability, which will lead to the degradation of recycled aggregate. Very limited use in structural concrete

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A recycled aggregate concrete, made of the following raw materials in parts by mass: cement 220, fly ash 60, mineral powder 60, stone 80, recycled aggregate 850, yellow sand 180, mineral dressing powder 660, admixture 5, water 160 . Among them, the particle size of the stone is 5-32mm; the fineness modulus of the beneficiation powder is greater than or equal to 2.3.

[0023] The parts by mass of each component in the admixture are: sodium rosinate 3, polyacrylamide 2, polyacrylic acid 1, sodium gluconate 3, carboxymethyl cellulose 3, allyl polyoxyethylene ether 3, dodecyl Sodium Alkyl Sulfate 2, Calcium Lignosulfonate 4, Triisopropanolamine 1, Water 60.

[0024] The preparation method of above-mentioned recycled aggregate concrete is characterized in that, comprises the following steps:

[0025] (1) Sodium rosinate, polyacrylamide, polyacrylic acid, sodium gluconate, carboxymethyl cellulose, allyl polyoxyethylene ether, sodium lauryl sulfate, calcium lignosulfonate, t...

Embodiment 2

[0032] A recycled aggregate concrete, made of the following raw materials in parts by mass: cement 260, fly ash 80, mineral powder 80, stone 60, recycled aggregate 1100, yellow sand 140, beneficiation powder 620, admixture 8, water 180 . Among them, the particle size of the stone is 5-32mm; the fineness modulus of the beneficiation powder is greater than or equal to 2.3.

[0033] The parts by mass of each component in the admixture are: sodium rosinate 5, polyacrylamide 4, polyacrylic acid 3, sodium gluconate 5, carboxymethyl cellulose 1, allyl polyoxyethylene ether 1, dodecyl Sodium Alkyl Sulfate 0.5, Calcium Lignosulfonate 6, Triisopropanolamine 2, Water 80.

[0034] The preparation method of above-mentioned recycled aggregate concrete is characterized in that, comprises the following steps:

[0035] (1) Sodium rosinate, polyacrylamide, polyacrylic acid, sodium gluconate, carboxymethyl cellulose, allyl polyoxyethylene ether, sodium lauryl sulfate, calcium lignosulfonate, t...

Embodiment 3

[0042] A recycled aggregate concrete, made of the following raw materials in parts by mass: cement 240, fly ash 70, mineral powder 70, stone 74, recycled aggregate 980, yellow sand 159, beneficiation powder 637, admixture 6.1, water 170 . Among them, the particle size of the stone is 5-32mm; the fineness modulus of the beneficiation powder is greater than or equal to 2.3.

[0043] The parts by mass of each component in the admixture are: sodium rosinate 4, polyacrylamide 3, polyacrylic acid 2, sodium gluconate 4, carboxymethyl cellulose 2, allyl polyoxyethylene ether 2, dodecyl Sodium Alkyl Sulfate 1.3, Calcium Lignosulfonate 5, Triisopropanolamine 1.5, Water 70.

[0044] The preparation method of above-mentioned recycled aggregate concrete is characterized in that, comprises the following steps:

[0045] (1) Sodium rosinate, polyacrylamide, polyacrylic acid, sodium gluconate, carboxymethyl cellulose, allyl polyoxyethylene ether, sodium lauryl sulfate, calcium lignosulfonate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Slumpaaaaaaaaaa
Login to View More

Abstract

The invention provides recycled aggregate concrete and a preparation method thereof. The recycled aggregate concrete is prepared from the following raw materials in parts by mass: 220-260 parts of cement, 60-80 parts of fly ash, 60-80 parts of mineral powder, 60-80 parts of stone, 850-1,100 parts of recycled aggregate, 140-180 parts of yellow sand, 620-660 parts of beneficiation powder, 5-8 parts of additives and 160-180 parts of water, wherein the additives consist of sodium abietate, polyacrylamide, polyacrylic acid, sodium gluconate, carboxymethylcellulose, allyl polyoxyethylene ether, sodium dodecyl sulfate, calcium lignosulphonate, triisopropanolamine and water. In the invention, the construction waste is made into recycled aggregate to replace natural aggregate, and the consumption of natural aggregate in the construction industry can be reduced to lower the cost. By optimizing the proportion and adding reasonable additives, the shortcomings of difficulty in slump control and low strength of traditional recycled aggregate concrete are overcome.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to recycled aggregate concrete and a preparation method thereof. Background technique [0002] With the rapid development of the economy, in many big cities in my country, the waste generated by the construction industry has become a public hazard. These wastes not only cause serious damage to the environment, but also compete with human beings for living space, seriously affecting the sustainable development of the country. Therefore, it is imminent to develop new technologies to reduce, recycle and utilize construction waste. [0003] Construction waste generally consists of concrete fragments, clay bricks and tiles, sand and dust, wood chips, plastic and waste paper, scrap metal, etc. Concrete fragments are usually the largest component of construction waste, and crushed and screened concrete fragments can be used to replace natural aggregate in concrete or as a foundation for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B28/00C04B18/16
CPCC04B28/00C04B18/08C04B14/04C04B18/167C04B18/12C04B14/06C04B24/34C04B24/26C04B24/10C04B24/383C04B24/32C04B24/16C04B24/18C04B24/122Y02W30/91
Inventor 杨德杰刘伟
Owner 南京汪海混凝土有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com