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

High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture

A high-strength concrete and admixture technology, applied in the field of concrete, can solve the problems of high iron content, low comprehensive utilization rate, variable composition, etc., and achieve the effects of improving gradation, reducing production costs, good workability and mechanical properties

Inactive Publication Date: 2015-03-11
CHINA BUILDING MATERIALS ACAD
View PDF10 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest feature of this kind of tailings is high iron content and variable composition, so its comprehensive utilization rate is far lower than the average level of iron tailings

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

[0016] According to the weight percentage of the present invention, the raw materials used in the concrete are as follows: the consumption of magnetized reduction roasting iron-selected tailings is 4%, the consumption of cement is 16%, the consumption of polycarboxylate water reducer is 0.2%, and the consumption of gravel is 43%. The sand usage is 29% and the water usage is 6.8%. According to the preparation method of the above-mentioned concrete, the slump and compressive strength tests were carried out on the obtained concrete respectively. The slump of the prepared concrete is 230mm, the 3d compressive strength is 39MPa, the 7d compressive strength is 54.3MPa, and the 28d compressive strength is 65.3MPa. Reach the strength grade requirement of C60 concrete.

Embodiment 2

[0018] According to the weight percentage of the present invention, the raw materials used in the concrete are as follows: the amount of magnetization reduction roasting iron-selected tailings is 5.2%, the amount of cement is 15.7%, the amount of polycarboxylate water reducer is 0.25%, and the amount of crushed stone is 43.3%. The sand usage is 28.95% and the water usage is 6.8%. According to the preparation method of the above-mentioned concrete, the slump and compressive strength tests were carried out on the obtained concrete respectively. The slump of the prepared concrete is 230mm, the 3d compressive strength is 35MPa, the 7d compressive strength is 52.3MPa, and the 28d compressive strength is 66.9MPa. Reach the strength grade requirements of C60 high-strength concrete.

Embodiment 3

[0020] According to the weight percentage of the present invention, the raw materials used in the concrete are as follows: the amount of magnetization reduction roasting iron-selected tailings is 6.3%, the amount of cement is 14.6%, the amount of polycarboxylate water reducer is 0.29%, and the amount of crushed stone is 43%. The amount of sand was 28.51%, and the amount of water was 7.3%. According to the preparation method of the above-mentioned concrete, the slump and compressive strength tests were carried out on the obtained concrete respectively. The slump of the prepared concrete is 230mm, the 3d compressive strength is 31MPa, the 7d compressive strength is 50.8MPa, and the 28d compressive strength is 67.1MPa. Reach the strength grade requirements of C60 high-strength concrete.

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
Slumpaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to high-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as an admixture. The high-strength concrete comprises, in percent by mass, 12%-16% of cement, 4%-9% of magnetized reduced roasted iron-beneficiation tailings with the average particle size of 10-12 mu m, 0.2%-0.4% of an efficient water reducer, 42%-43% of a coarse aggregate, 28%-29% of a aggregates, and 6.5%-7.5% of water. The advantages comprises magnetized reduced roasted iron-beneficiation tailings are directly used to replace mineral slag powder or fly ash and are used as an concrete admixture to prepare C50-C60 grade concrete, so that the concrete finally obtains good workability and mechanical properties, the production cost of concrete is reduced, the environmental harm of magnetized reduced roasted iron-beneficiation tailings is reduced, and therefore the high-strength concrete possesses obvious economic benefit and social benefit.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a high-strength concrete in which magnetization reduction, roasting and iron-selection tailings are used as admixtures. Background technique [0002] Iron tailings have become the solid waste with the largest output and low comprehensive utilization rate in my country. Compared with solid waste such as fly ash and coal gangue, the comprehensive utilization technology of iron tailings is more complicated and more difficult. At present, the total utilization rate of industrial solid waste in my country is about 60%, while the average utilization rate of iron tailings is only 14%. In contrast, the comprehensive utilization of iron tailings lags behind. [0003] Magnetization reduction roasting iron tailings is a branch of iron tailings, and its proportion in the discharge and utilization of iron tailings cannot be underestimated. This kind of iron tailings is obtained from weak magnetic ir...

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): C04B28/00C04B18/12
CPCY02W30/91
Inventor 张文生王宏霞叶家元史迪张建波
Owner CHINA BUILDING MATERIALS ACAD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com