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A kind of sleeve grout composition for iron tailings sand reinforcement connection and its preparation and application

A technology of iron tailings sand and sleeve grouting, which is applied in the direction of building structure, building components, structural elements, etc., can solve the problems of poor volume stability, fast loss, and low strength, and achieve low raw material cost, large fluidity, and high performance. stable effect

Active Publication Date: 2021-10-22
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the first aspect of the present invention provides a continuous graded iron tailings sand steel reinforcement sleeve grouting material composition, the composition uses continuous graded iron tailings sand instead of quartz sand, It effectively overcomes the problems of traditional grouting materials that the fluidity does not meet the national standard, the loss is fast, the early vertical expansion rate is not up to the standard, the early and late strength is not high (not up to the standard), and the later volume stability is poor. The bulk solid waste has good economic and social benefits

Method used

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  • A kind of sleeve grout composition for iron tailings sand reinforcement connection and its preparation and application
  • A kind of sleeve grout composition for iron tailings sand reinforcement connection and its preparation and application
  • A kind of sleeve grout composition for iron tailings sand reinforcement connection and its preparation and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] The cement used in the experiment is anti-cracking double fast high belite 42.5 sulphoaluminate cement.

[0100] Continuously graded iron tailings sand for experiments, continuous graded iron tailings sand below 1.18mm.

[0101] Experimental polycarboxylate superplasticizer, polycarboxylate powder superplasticizer, model PC-1030.

[0102] Experimental expansion agent, UEA expansion agent.

[0103] Experimental retarder, sodium tetraborate and gypsum retarder, the mass ratio of sodium tetraborate to gypsum is 0.02-0.05.

[0104] Experimental coagulant, lithium carbonate.

[0105] Experimental regulator, hydroxypropyl methylcellulose ether, viscosity 15000-60000mPa.s.

[0106] Experimental defoamer, polyether modified silicon defoamer.

[0107] Proportion (parts by weight): 820 parts of cement, 950 parts of continuously graded iron tailings, 3 parts of polycarboxylate superplasticizer, 0.5 parts of expansion agent, 2 parts of retarder, 2 parts of coagulation accelerat...

Embodiment 2

[0111] The cement used in the experiment is anti-cracking double fast high belite 42.5 sulphoaluminate cement.

[0112] Continuously graded iron tailings sand for experiments, continuous graded iron tailings sand below 1.18mm.

[0113] Experimental polycarboxylate superplasticizer, polycarboxylate powder superplasticizer, model PC-1030.

[0114] Experimental expansion agent, UEA expansion agent.

[0115] Experimental retarder, sodium tetraborate and gypsum retarder, the mass ratio of sodium tetraborate and gypsum is 0.02-0.05.

[0116] Experimental coagulant, lithium carbonate.

[0117] Experimental regulator, hydroxypropyl methylcellulose ether, viscosity 15000-60000mPa.s.

[0118] Experimental defoamer, polyether modified silicon defoamer.

[0119] Proportion (parts by weight): 860 parts of cement, 930 parts of continuously graded iron tailings, 4 parts of polycarboxylate superplasticizer, 0.5 parts of expansion agent, 2 parts of retarder, 1 part of coagulation accelerat...

Embodiment 3

[0123] The cement used in the experiment is anti-cracking double fast high belite 42.5 sulphoaluminate cement.

[0124] Continuously graded iron tailings sand for experiments, continuous graded iron tailings sand below 1.18mm.

[0125] Experimental polycarboxylate superplasticizer, polycarboxylate powder superplasticizer, model PC-1030.

[0126] Experimental expansion agent, UEA expansion agent.

[0127] Experimental retarder, sodium tetraborate and gypsum retarder, the mass ratio of sodium tetraborate to gypsum is 0.02-0.05.

[0128] Experimental coagulant, lithium carbonate.

[0129] Experimental regulator, hydroxypropyl methylcellulose ether, viscosity 15000-60000mPa.s.

[0130] Experimental defoamer, polyether modified silicon defoamer.

[0131] Proportion (parts by weight): 920 parts of cement, 900 parts of continuously graded iron tailings, 3 parts of polycarboxylate superplasticizer, 0.5 parts of expansion agent, 3 parts of retarder, 1 part of coagulation accelerato...

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Abstract

The invention relates to a sleeve grouting material composition for iron tailings sand reinforcement connection, preparation and application of the grouting material, the grouting material composition includes cement, continuously graded iron tailings sand and optional desulfurized gypsum powder, and adopts continuous Graded iron tailings sand replaces quartz sand, which effectively overcomes the problems of traditional grouting materials such as fluidity not up to the national standard, rapid loss, early vertical expansion rate not up to standard, early and late strength (not up to standard), and late volume stability. problems, and a large amount of bulk solid waste is used in a real sense, which has good economic and social benefits.

Description

technical field [0001] The invention relates to a sleeve grouting material composition for iron tailings sand reinforcement connection and a preparation method and application thereof. Background technique [0002] With the continuous progress of science and technology in our country, the assembly industry has developed very rapidly. Prefabricated buildings have the advantages of fast construction speed, energy saving, environmental protection, and integration, and have become a very important development direction of modern architecture. At present, sleeve grouting connections account for more than 80% of the market for prefabricated concrete components in prefabricated buildings. The sleeve grouting material is an important component material of the steel sleeve grouting connection, and its performance determines the reliability and quality stability of the connection part structure. In northern China, it is unavoidable to encounter sleeve grouting at a temperature lower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06E04C5/16C04B111/70
CPCC04B28/06C04B2111/70C04B2201/50E04C5/165C04B18/12C04B2103/302C04B2103/22C04B22/10C04B24/383C04B24/42
Inventor 王栋民白亚飞张双成孙睿王璜琪刘泽吕南耿丹华
Owner CHINA UNIV OF MINING & TECH (BEIJING)