Retarding composite limestone powder admixture

A limestone powder and admixture technology, applied in the field of building materials, can solve problems such as loss of concrete slump over time, waste of resources, and adverse environmental effects, to solve the shortage of fly ash, reduce loss over time, and prolong condensation the effect of time

Inactive Publication Date: 2014-06-04
CHONGQING XINCAI CONCRETE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Discarding limestone powder not only wastes resources, takes up storage space, but also has adverse effects on the environment
In addition, the setting time of concrete produced by many mixing plants is too short, especially in summer, which is not conducive to the smooth progress of construction, and the loss of concrete slump over time is serious

Method used

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  • Retarding composite limestone powder admixture
  • Retarding composite limestone powder admixture
  • Retarding composite limestone powder admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Each component will be taken according to the following weight percentage proportioning,

[0016] Limestone: 80%, steel slag 15%, phosphorus slag: 4%, triethanolamine: 1%

[0017] The above-mentioned components are mixed uniformly and then ground into fine powder, the specific surface area of ​​which is more than or equal to 350㎡ / kg to obtain the admixture.

Embodiment 2

[0019] Each component will be taken according to the following weight percentage proportioning,

[0020] Limestone: 75%, steel slag 20%, phosphorus slag: 3%, triethanolamine: 2%

[0021] The above components are mixed evenly and ground into fine powder, the specific surface area of ​​which is ≥350m 2 / kg to obtain the admixture.

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Abstract

The invention relates to a retarding composite limestone powder admixture which comprises the following components by weight: 75-90% of limestone powder; 15-20% of steel slag; 3-8% of phosphorus slag; 0.3-2% of grinding aid. The components are well mixed according to the ratios, and then grinded into fine powder with a fineness specific surface area of not less than 350 m2 / kg to obtain the admixture. The admixture has retarding effect, reduces gradual loss in slump of concrete, facilitates smooth construction, and meets requirements of working performance, mechanical properties, and durability of concrete during construction; the admixture adopts limestone powder instead of cement or fly ash, thereby preventing resource waste; concrete prepared by the admixture of the invention is suitable for various building constructions.

Description

technical field [0001] The invention relates to building materials, in particular to a retarded composite limestone powder admixture. Background technique [0002] At present, the admixtures used in concrete production are mainly fly ash and mineral powder. With the increase of concrete consumption, there is a shortage of fly ash in many areas. It is imperative to find a material that can replace cement or fly ash. Row. [0003] In recent years, as the amount of concrete has increased year by year, natural sand and gravel resources have also been scarce in many places. As a result, there have been quarries that use limestone to make machine-made sand and gravel. In the process of producing machine-made sand and gravel A lot of limestone powder is produced. Discarding limestone powder not only wastes resources, takes up storage space, but also has adverse effects on the environment. In addition, the setting time of concrete produced by many mixing plants is too short, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147
CPCY02P40/10
Inventor 王维勇董强李清龙王世兵
Owner CHONGQING XINCAI CONCRETE GRP
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