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High-strength micro-expansive grouting material and its preparation method

A grouting material and micro-expansion technology, which is applied in the field of high-strength micro-expansion grouting materials and its preparation, can solve the problems of compressive strength drop, low flexural strength, and poor durability, and achieve late strength growth, early strength, and durability. Good results

Active Publication Date: 2014-08-13
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to develop a preparation method of high-strength micro-expansion grouting material to solve the shortcomings of existing cement-based grouting material products such as low early flexural strength, cracking, decreased compressive strength, and poor durability in the later stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] The raw materials of the high-strength micro-expansion grouting material are Portland cement with a compressive strength of 42.5MPa, sulfoaluminate cement with a compressive strength of 42.5MPa, calcium sulfoaluminate expansion agent, quartz sand, silicone defoamer P803, polycarboxylate Acid high-efficiency superplasticizer, calcium formate, hydroxypropyl methylcellulose ether, and formulated according to the following weights:

[0031] 42.5MPa Portland cement: 43%;

[0032] 42.5MPa sulfoaluminate cement: 5%;

[0033] Calcium sulfoaluminate expansion agent: 4%;

[0034] 20-60 mesh quartz sand: 35%

[0035] 70-140 mesh quartz sand: 12%;

[0036] Silicone defoamer P803: 0.25%;

[0037] Polycarboxylate superplasticizer: 0.4%;

[0038] Calcium formate: 0.3%;

[0039] Hydroxypropyl methylcellulose ether: 0.05%;

[0040] Water accounts for 13.5% of the total amount of dry powder.

[0041] The preparation process is as follows: first weigh 43% 42.5MPa Portland cement, ...

example 2

[0043] The raw materials of the high-strength micro-expansion grouting material are Portland cement with a compressive strength of 52.5MPa, calcium sulfoaluminate expansion agent, corundum, quartz sand, silicone defoamer P803, polycarboxylic acid superplasticizer, lithium carbonate, Sodium gluconate, hydroxyethyl methylcellulose ether, and formulated in the following weights:

[0044] 52.5MPa Portland cement: 53%;

[0045] Calcium sulfoaluminate expansion agent: 3.0%;

[0046] 20-50 mesh corundum: 31%

[0047] 70-120 mesh quartz sand: 12%;

[0048] Silicone defoamer P803: 0.25%;

[0049] Polycarboxylate superplasticizer: 0.5%;

[0050] Lithium carbonate: 0.05%;

[0051] Sodium gluconate: 0.15%;

[0052] Hydroxyethyl methyl cellulose ether: 0.05%;

[0053] Water accounted for 14.0% of the total dry powder.

[0054] The preparation process is as follows: first weigh 53% 52.5MPa Portland cement and 3% calcium sulfoaluminate expansion agent according to the formula, and th...

example 3

[0056]The raw materials of the high-strength micro-expansion grouting material are Portland cement with a compressive strength of 42.5MPa, sulfoaluminate cement with a compressive strength of 42.5MPa, calcium sulfoaluminate expansion agent, corundum, silicone defoamer P803, polycarboxylic acid Superplasticizer, sodium gluconate, methyl cellulose ether, and formulated in the following weights

[0057] 42.5MPa Portland cement: 50%;

[0058] 42.5MPa sulfoaluminate cement: 5%;

[0059] Calcium sulfoaluminate expansion agent: 4.5%

[0060] 20-50 mesh corundum: 28%

[0061] 70-120 mesh corundum: 11.5%;

[0062] Silicone defoamer P803: 0.3%;

[0063] Polycarboxylate superplasticizer: 0.5%;

[0064] Sodium gluconate: 0.15%;

[0065] Methyl cellulose ether: 0.05%;

[0066] Water accounted for 14.0% of the total dry powder.

[0067] The preparation process is as follows: first weigh 50% 42.5MPa Portland cement, 5% 42.5MPa sulphoaluminate cement, and 4.5% calcium sulphoaluminate ...

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Abstract

The invention provides a high-strength micro-expansive grouting material and its preparation method. Raw materials of the high-strength micro-expansive grouting material comprise Portland cement having a compressive strength of above 42.5MPa, sulphoaluminate cement or aluminous cement having a compressive strength of above 42.5MPa, a calcium sulphoaluminate expanding agent, quartz sand or corundum or iron tailings, an organic silicon antifoaming agent, a polycarboxylate superplasticizer, calcium formate or lithium carbonate, sodium gluconate, and methyl cellulose ether or hydroxypropyl methyl cellulose ether or hydroxyethyl methyl cellulose ether. Compared with present cement-based grouting materials treating the sulphoaluminate cement and the aluminous cement as main cementing materials, the high-strength micro-expansive grouting material, which is obtained through treating the Portland cement as a main cementing material component, carrying out ultrafine crushing of the cementing material component via an ultrafine crushing technology, and processing, has the characteristics of high early-stage strength, excellent fluidity, increased long-term strength, and good durability; and compared with traditional epoxy mortars, the high-strength micro-expansive grouting material has the characteristics of micro-expansion, simple and fast construction, non-toxicity, and harmlessness.

Description

technical field [0001] The invention relates to the production technical field of grouting materials, and is especially suitable for high-speed railway bridge bearing grouting, highway bridge grouting, general building grouting, and large-scale equipment installation grouting. Specifically, it relates to a high-strength micro-expansion grouting material and its preparation method. Background technique [0002] According to the method of ordinary cement mortar pouring, it usually takes more than 7 days of curing before it can be put into use. Metallurgy, chemical industry, electric power, building materials, railways, highways, bridges and other construction and equipment reinforcement anchorage and foundation grouting are often limited by the hardening and curing time of the secondary pouring of the concrete foundation. The early high-strength grouting materials are mainly composed of organic epoxy resins, which are expensive, easy to age, and highly toxic, and the effect i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
Inventor 杨飞华郝利炜吴学谦
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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