Composite admixture for concrete and preparation method thereof

A composite admixture and concrete technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as reduction, and achieve the effect of improving bond strength and concrete strength

Pending Publication Date: 2021-03-09
罗定市宏泰建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the strength of concrete is reduced after the admixture made of existing solid waste is mixed with concrete, the invention discloses a composite admixture for concrete and a preparation method thereof. The composite admixture for concrete can reach the national standard II grade standards, while effectively improving the strength of the mixed concrete

Method used

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Examples

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preparation example Construction

[0032] The present invention also provides the preparation method of the composite admixture for concrete as described above, comprising the following steps:

[0033] Weigh the following components by weight for blending, among them, 12-21 parts of silica, 11-16 parts of black rock, 24-43 parts of blast furnace slag, 15-31 parts of quarry stone powder, 15-31 parts of ceramic tiles, 9-21 parts of fly ash, 0.5-2 parts of grinding aid, 0.1-3 parts of ammonium persulfate;

[0034] After mixing evenly, grind the mixture, put the mixture into a stirring tank after grinding, keep stirring and heat the mixture to 40-50 degrees Celsius for 1-2 hours, and carry out surface treatment;

[0035] After the surface treatment is completed, keep stirring and raise the temperature to 800°C-1100°C for calcination, and keep it for 1-2h to decompose the ammonium persulfate;

[0036] Cool to room temperature to obtain a composite admixture for concrete.

[0037] In one embodiment, when performing...

Embodiment 1

[0041] This embodiment discloses a method for a composite admixture for concrete, comprising the following steps:

[0042] Weigh the following components by weight for blending, among them, 12 parts of silica, 16 parts of black rock, 43 parts of blast furnace slag, 15 parts of quarry stone powder, 31 parts of tiles from ceramic factory, 9 parts of fly ash, and 0.5 parts of triethanolamine , 3 parts of ammonium persulfate, 5 parts of dehydrated gypsum;

[0043] After mixing evenly, grind the mixture, put the mixture into the stirring tank after grinding, keep stirring and heat the temperature of the mixture to 40-50 degrees Celsius, keep it for 1 hour, and carry out surface treatment;

[0044] After the surface treatment is completed, keep stirring and raise the temperature to 1000°C for calcination, and keep it for 1 hour to decompose the ammonium persulfate;

[0045] Cool to room temperature, add 0.5 part of silane coupling agent in the mixture, carry out secondary surface t...

Embodiment 2

[0048] This embodiment discloses a method for a composite admixture for concrete, comprising the following steps:

[0049] Weigh the following components by weight for blending, among them, 15 parts of silica, 12 parts of black rock, 24-43 parts of blast furnace slag, 21 parts of quarry stone powder, 23 parts of tiles from ceramic factory, 15 parts of fly ash, triethanolamine 1 part, 2 parts of ammonium persulfate, 7 parts of dehydrated gypsum;

[0050] After mixing evenly, grind the mixture, put the mixture into the stirring tank after grinding, keep stirring and heat the temperature of the mixture to 40-50 degrees Celsius, keep it for 2 hours, and carry out surface treatment;

[0051] After the surface treatment is completed, keep stirring and raise the temperature to 900°C for calcination, and keep it for 2 hours to decompose the ammonium persulfate;

[0052] Cool to room temperature to obtain a composite admixture for concrete.

[0053] Labeled S2.

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PUM

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Abstract

The invention discloses a composite admixture for concrete. The composite admixture is prepared from the following raw materials in parts by weight: 12-21 parts of silica, 11-16 parts of black rock, 24-43 parts of blast furnace slag, 15-31 parts of quarry stone powder, 15-31 parts of ceramic factory tiles, 9-21 parts of fly ash, 0.5-2 part of a grinding aid and 0.1-3 part of ammonium persulfate. The invention also provides a preparation method of the composite admixture for the concrete. The composite admixture for the concrete can reach the national standard secondary standard, and meanwhile,the strength of the blended concrete is effectively improved.

Description

technical field [0001] The invention relates to the technical field of mixed materials, in particular to a composite admixture for concrete and a preparation method thereof. Background technique [0002] The micro-expansion admixture reacts with the cement and water in the concrete to produce crystals with larger volumes, which causes the volume of the concrete to expand and generate a certain prestress, which helps to control the shrinkage and cracking of the concrete. The existing micro-expansion admixture is generally made of bauxite as the main material, but its cost is relatively high. In addition, the treatment of solid waste such as dehydrated gypsum, converter slag, and blast furnace slag fly ash has always been a difficult problem. How to make full use of the above solid waste and turn waste into treasure has been a long-term research problem. [0003] However, the existing admixtures made from solid wastes have a relatively low binding force with the cement in the...

Claims

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Application Information

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IPC IPC(8): C04B18/16C04B24/42
CPCC04B40/0046C04B14/043C04B14/00C04B18/142C04B18/12C04B18/165C04B18/08C04B24/122C04B22/147C04B24/42Y02W30/91
Inventor 陈华才
Owner 罗定市宏泰建材有限公司
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