Super-early-strength and super-high-strength inorganic grouting material based on ordinary Portland cement and preparation method of grouting material

A technology of ordinary portland cement and grouting materials, which is applied in the field of grouting materials, can solve the problems of low early strength, large volume shrinkage, and frequent adjustment of proportion, so as to improve early strength, low material cost, and easy production and promotion Effect

Active Publication Date: 2021-06-11
四川省佳宇建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the steel grouting sleeve connection technology used in the prefabricated buildings vigorously promoted in my country at this stage requires the grouting material to have super early strength, high flow and micro-expansion properties; the repair of the airport runway is difficult to adapt to the opening of traffic after 24 hours Economic development, and the application of super early strength cement-based grouting materials can shorten the opening time of traffic, generally require its 8-hour compressive strength not less than 20MPa; when there are special requirements, its 2-hour compressive strength not less than 20MPa
[0003] The preparation of super-early-strength cement-based grouting materials in the prior art is concentrated in the following three ways: one is to use Portland cement as the main cementitious material, and add other admixtur

Method used

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  • Super-early-strength and super-high-strength inorganic grouting material based on ordinary Portland cement and preparation method of grouting material

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Experimental program
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Effect test

Embodiment 1

[0038] A super-early-strength super-high-strength inorganic grout based on ordinary Portland cement, mainly including the following ingredients:

[0039] In kg by weight: P.O42.5 cement 380kg, silica fume 20kg (silica fume fineness is 700-900 mesh, activity index greater than 95%), rapid hardening agent 100kg, quartz sand 500kg, of which 10-20 mesh 175kg, 20-40 mesh 175kg, 40-70 mesh 150kg, polycarboxylate superplasticizer (20% solid content) 7kg, cellulose ether 0.2kg, defoamer 1kg; Compatible with 15kg of anhydrous gypsum and 5kg of light-burned magnesium oxide.

[0040] After mixing and stirring the components according to the water-binder ratio of 0.24 to make a mixed slurry, test the fluidity of the mixed slurry and test the flexural and compressive strength of the hardened slurry after forming and curing; the test results are as follows:

[0041] Initial fluidity 327mm, 30min fluidity 316mm; 2h compressive strength 24.5MPa, 3h flexural strength 4.6MPa; 1d compressive st...

Embodiment 2

[0043]A super-early-strength super-high-strength inorganic grout based on ordinary Portland cement, mainly including the following ingredients:

[0044] In kg by weight: P.O52.5 cement 380kg, silica fume 20kg (silica fume fineness is 700-900 mesh, activity index greater than 95%), rapid hardening agent 100kg, quartz sand 500kg, of which 10-20 mesh 175kg, 20-40 mesh 175kg, 40-70 mesh 150kg, polycarboxylate superplasticizer (20% solid content) 7kg, cellulose ether 0.2kg, defoamer 1kg; Compatible with 15kg of anhydrous gypsum and 5kg of light-burned magnesium oxide.

[0045] After mixing and stirring the components according to the water-binder ratio of 0.24 to make a mixed slurry, test the fluidity of the mixed slurry and test the flexural and compressive strength of the hardened slurry after forming and curing; the test results are as follows:

[0046] Initial fluidity 328mm, 30min fluidity 293mm; 2h compressive strength 26.2MPa, 2h flexural strength 4.5MPa; 1d compressive str...

Embodiment 3

[0048] A super-early-strength super-high-strength inorganic grout based on ordinary Portland cement, mainly including the following ingredients:

[0049] In kg by weight: P.O52.5 cement 340kg, silica fume 20kg (silica fume fineness is 700-900 mesh, activity index greater than 95%), rapid hardening agent 90kg, quartz sand 550kg, of which 10-20 mesh 190kg, 190kg for 20-40 mesh, 170kg for 40-70 mesh, 6.3kg of polycarboxylate superplasticizer (solid content 20%), 0.2kg of cellulose ether, 1kg of defoamer; 40kg of calcium fluoroaluminate mineral, iron Compatible with 30kg of calcium aluminate mineral, 10kg of anhydrite and 10kg of light-burned magnesium oxide.

[0050] After mixing and stirring the components according to the water-binder ratio of 0.26 to make a mixed slurry, test the fluidity of the mixed slurry and test the flexural and compressive strength of the hardened slurry after forming and curing; the test results are as follows:

[0051] Initial fluidity 329mm, 30min fl...

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Abstract

The invention discloses a super-early-strength and super-high-strength inorganic grouting material based on ordinary Portland cement and a preparation method of the grouting material. The grouting material comprises the following components in parts by weight: 300-500 parts of ordinary Portland cement, 10-50 parts of silica fume, 400-600 parts of fine aggregate, 50-200 parts of a rapid hardening agent, 3-15 parts of a water reducing agent, 0.1-5 parts of a water-retaining agent and 0.1-5 parts of a defoaming agent. The rapid hardening agent comprises the following components in parts by weight: 20-100 parts of calcium aluminate mineral, 5-50 parts of anhydrous gypsum and 1-50 parts of light calcined magnesia. The calcium aluminate mineral is selected from one or more of anhydrous calcium sulphoaluminate mineral, calcium fluoroaluminate mineral, calcium aluminoferrite mineral, monocalcium aluminate and dodecacalcium heptaaluminate. The super-early-strength inorganic grouting material provided by the invention has ultrahigh hour strength while meeting workability, and the early strength of the grouting material is greatly improved; and the ordinary Portland cement and the anhydrite are used as basic raw materials, so that the material cost is low, and production and popularization are easy.

Description

technical field [0001] The invention relates to the technical field of grouting materials, in particular to a super-early-strength and ultra-high-strength inorganic grouting material based on ordinary Portland cement and a preparation method thereof. Background technique [0002] Cement-based non-shrinkage grouting material has the characteristics of good fluidity, fast hardening, high strength, micro-expansion, non-toxic, non-aging, pollution-free, rust-proof, and convenient construction. It is widely used in anchor bolts, nuclear power equipment, and equipment foundations. Secondary grouting, reinforcement and reconstruction of reinforced concrete structures, crack treatment of old concrete structures, etc. Moreover, the steel grouting sleeve connection technology used in the prefabricated buildings vigorously promoted in my country at this stage requires the grouting material to have super early strength, high flow and micro-expansion properties; the repair of the airport...

Claims

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Application Information

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IPC IPC(8): C04B22/14C04B28/04C04B103/14C04B111/70
CPCC04B40/0039C04B28/04C04B2103/14C04B2111/70C04B2201/50C04B22/0093C04B22/126C04B22/148C04B22/143C04B22/066C04B18/146C04B14/06C04B14/068C04B2103/302C04B2103/465C04B2103/50Y02W30/91
Inventor 周元蒋俊赖振宇王颖李军苏方远
Owner 四川省佳宇建设集团有限公司
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