Machine-made sand self-compaction concrete

A technology of self-compacting concrete and machine-made sand, which is applied in the field of building materials, can solve the problems of physical injury of operators, complicated production operations, susceptibility to aspiration lung disease, etc., and achieve low cost, low slump loss, and physical health protection Effect

Inactive Publication Date: 2009-01-28
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
View PDF1 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention uses silica fume, defoamer, tackifier and other components that have not been widely used in ordinary concrete at present, which effectively improves the flow performance and stability of the concrete system, but due to the special materials such as silica fume The price is relatively expensive, which makes the invention have defects such as relatively high applicati

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
  • Machine-made sand self-compaction concrete
  • Machine-made sand self-compaction concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Make the machine-made sand self-compacting concrete 1m 3 , Take 400kg of cement, 150kg of fly ash, 0kg of mineral powder, 4kg of polycarboxylate superplasticizer, 920kg of machine-made sand, 560kg of pebbles, and 560kg of gravel. The machine-made sand is crushed from pebbles, with a fineness modulus of 2.8, gradation meeting the sand edge requirements in Zone II, and a stone powder content of 9%. The pebbles have a continuous gradation of 5-16mm, and the crushed stones have a continuous gradation of 10-20mm. Both the pebbles and the crushed stones have been washed with water, and the mud content is 0.4%. The cement is ordinary Portland cement with a strength grade of 42.5. The fly ash is Class I fly ash, and its water demand ratio is 100%. The mineral powder is S75 grade with a specific surface area of ​​360m 2 / kg, the fluidity ratio is 110%. The solid content of the polycarboxylate water reducer is 20%.

[0012] When in use, 200kg of water is mixed with the above...

Embodiment 2

[0014] Make the machine-made sand self-compacting concrete 1m 3 , Take 350kg of cement, 100kg of fly ash, 100kg of mineral powder, 2.8kg of polycarboxylate superplasticizer, 770kg of machine-made sand, 525kg of pebbles, and 525kg of gravel. The machine-made sand is crushed from pebbles, the fineness modulus is 2.5, the gradation meets the sand edge requirements in Zone II, and the stone powder content is 8%. The pebbles have a continuous gradation of 5-16mm, and the crushed stones have a continuous gradation of 10-20mm. Both the pebbles and the crushed stones have been washed with water, and the mud content is 0.35%. The cement is ordinary Portland cement with a strength of 52.5 strength grade. The fly ash is Class II fly ash, and its water demand ratio is 95%. The mineral powder is S75 grade with a specific surface area of ​​330m 2 / kg, the fluidity ratio is 108%. The solid content of the polycarboxylate water reducer is 20%.

[0015] When in use, 157.5kg of water is mix...

Embodiment 3

[0017] Make the machine-made sand self-compacting concrete 1m 3 , Take 400kg of cement, 100kg of fly ash, 50kg of mineral powder, 6kg of polycarboxylate superplasticizer, 1000kg of machine-made sand, 520kg of pebbles, and 520kg of gravel. The machine-made sand is crushed from pebbles, with a fineness modulus of 3.0, a gradation meeting the sand edge requirements in zone II, and a stone powder content of 10%. The pebbles have a continuous gradation of 5-16mm, and the crushed stones have a continuous gradation of 10-20mm. Both the pebbles and the crushed stones have been washed with water, and the mud content is 0.45%. The cement is ordinary Portland cement with a strength of 42.5R strength grade. The fly ash is Class II fly ash, and its water demand ratio is 98%. The mineral powder is S75 grade with a specific surface area of ​​390m 2 / kg, the fluidity ratio is 115%. The solid content of the polycarboxylate water reducer is 20%.

[0018] When in use, 240kg of water is mixe...

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
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a machine-made sand self-compacting concrete. The concrete is made from the following components according to parts by weight: 100 parts of cement, 25-45 parts of fly ash, 0-30 parts of mineral powder, 0.8-1.5 parts of a polycarboxylic acid water reducing agent, 220-250 parts of machine-made sand, 130-150 parts of cobble and 130-150 parts of crushed stone. The concrete saves natural resource as well as has high fluidity, high stability and low slump loss; compared with equivalent effects, the concrete has the advantages of lower cost and simpler production, meanwhile, silicon dust is not applied to the concrete, therefore, the health of operators is better guaranteed.

Description

technical field [0001] The invention belongs to building materials, and relates to a kind of concrete used for industrial and civil buildings, in particular to a vibration-free machine-made sand self-compacting concrete. Background technique [0002] Self-compacting concrete requires that the concrete mixture has a "liquefaction" property, has good flow performance and stability performance, and does not need to be vibrated during construction. The current technology for preparing self-compacting concrete generally uses river sand, which is relatively easy to achieve "self-compacting" by taking advantage of its excellent gradation and particle shape. At present, machine-made sand has become a conventional material in ordinary concrete, and its application is relatively mature; however, compared with river sand, machine-made sand has poor particle shape and poor gradation, which often reduces the flow performance and stability of fresh concrete . However, with the continuou...

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): C04B28/00C04B18/08C04B18/12C04B14/06
CPCC04B2111/00103C04B28/02Y02W30/91C04B14/06C04B18/08C04B20/0076C04B24/2647C04B14/02C04B14/04C04B2103/302C04B24/2641
Inventor 高育欣向卫平郑广军简晓军修晓明胡建平
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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