Lightweight aggregate concrete containing low-quality recycled aggregate and preparing method thereof

A lightweight aggregate concrete and recycled aggregate technology, applied in the field of lightweight aggregate concrete and its preparation, and macroporous concrete, can solve the problems of poor homogeneity, layered segregation, etc., and achieve low slump loss and strong dispersion , the effect is obvious

Active Publication Date: 2014-09-24
北京东方建宇混凝土科学技术研究院有限公司
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art that when low-quality recycled aggregates are applied to concrete, stratification and segregation are prone to occur, and poor homogeneity cannot be applied, and then provide a lightweight aggregate concrete with high fluidity and good homogeneity

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lightweight aggregate concrete containing low-quality recycled aggregate and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A lightweight aggregate concrete containing low-quality recycled aggregate, its raw material composition includes, cement 200kg / m 3 , water 170kg / m 3 , additional water 169kg / m 3 , low-quality recycled lightweight fine aggregate 551kg / m 3 , low-quality recycled lightweight coarse aggregate 563kg / m3, mineral powder 40kg / m3 3 , fly ash 60kg / m 3 , Borax 1.50kg / m 3 , sodium polystyrene sulfonate 1.50kg / m 3 , wherein the fineness modulus of the low-quality recycled lightweight fine aggregate is 2.6, and the bulk density is 1200kg / m 3 , the particle size of low-quality recycled lightweight coarse aggregate is 5-16mm, and the bulk density is 700kg / m 3 .

Embodiment 2

[0040] A lightweight aggregate concrete containing low-quality recycled aggregate, its raw material composition includes, cement 220kg / m 3 , water 165kg / m 3 , additional water 166kg / m 3 , low-quality recycled lightweight fine aggregate 532kg / m 3 , low-quality recycled lightweight coarse aggregate 571kg / m 3 , mineral powder 45kg / m 3 , fly ash 55kg / m 3 , sodium fluorosilicate 0.32kg / m 3 , Sodium polystyrene sulfonate 2.24kg / m 3 , wherein the fineness modulus of the low-quality recycled lightweight fine aggregate is 2.7, and the bulk density is 1100kg / m 3 , the particle size of low-quality recycled lightweight coarse aggregate is 5-16mm, and the bulk density is 800kg / m 3 .

Embodiment 3

[0042] A lightweight aggregate concrete containing low-quality recycled aggregate, its raw material composition includes, cement 250kg / m 3 , water 160kg / m 3 , additional water 163kg / m 3 , low-quality recycled lightweight fine aggregate 516kg / m 3 , low-quality recycled lightweight coarse aggregate 579kg / m 3 , mineral powder 50kg / m 3 , fly ash 50kg / m 3 , sodium polyphosphate 3.50kg / m 3 , sodium polystyrene sulfonate 2.8kg / m 3 , wherein the fineness modulus of the low-quality recycled lightweight fine aggregate is 2.8, and the bulk density is 1100kg / m 3 , the particle size of low-quality recycled lightweight coarse aggregate is 5-16mm, and the bulk density is 900kg / m 3 .

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
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses lightweight aggregate concrete containing low-quality recycled aggregate. The raw materials of the lightweight aggregate concrete are comprised of cement, coal ash, mineral powder, water, low-quality recycled light-fine aggregate, low-quality recycled light-coarse aggregate, inorganic salt and polrvinyl benzene sulphonate. The raw materials of the lightweight aggregate concrete further comprise additional water consumption. The additional water consumption is represented through the formula of delta W=msr*wsr + mgr*wgr, wherein the msr means consumption of the low-quality recycled light-fine aggregate, the wsr means the saturated-surface-dried water absorption rate of the low-quality recycled light-fine aggregate, the mgr means consumption of the low-quality recycled light-coarse aggregate and wgr means the 1h water absorption rate of the low-quality recycled light-coarse aggregate. According to the lightweight aggregate concrete and the preparing method of the lightweight aggregate concrete, when the low-quality recycled aggregate is applied to preparing of the lightweight aggregate concrete, through adjustment to the raw materials and matching with specific additionally added agents, the additional water consumption targeted to the low-quality recycled aggregate is adopted, so that the mixture state can meet the use requirements, the stable state of the mixture is maintained, cement slurry can be helped to be evenly coated around the aggregate, workability of the concrete mixture is good, and no bleeding and segregation phenomena exist.

Description

technical field [0001] The invention relates to a macroporous concrete, in particular to a lightweight aggregate concrete containing low-quality recycled aggregate and a preparation method thereof, belonging to the field of building material preparation. Background technique [0002] Lightweight aggregate concrete refers to the dry apparent density not greater than 1950kg / m3 prepared by light coarse aggregate, light fine aggregate (or ordinary sand), cementitious material and water. 3 of concrete. Among them, the lightweight aggregate concrete prepared with light fine aggregate as aggregate is full lightweight concrete; the lightweight aggregate concrete prepared with ordinary sand or part of light fine aggregate as fine aggregate is sand lightweight concrete. Lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, heat preservation, heat insulation, earthquake resistance, wear resistance and other functional characteristics...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 段遵莉武俊宇王安岭赵玉芳张欣李习章
Owner 北京东方建宇混凝土科学技术研究院有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap