A shield grouting material for severe environment

A grouting material and environmental technology, applied in the field of building materials, can solve problems such as impermeability and corrosion resistance of grouting materials, reinforced concrete structure infringement, etc., to avoid low consolidation shrinkage, improve fluidity, High water reduction effect

Active Publication Date: 2019-03-08
CHINA ACAD OF BUILDING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because traditional grouting materials do not consider the impermeability and corrosion resistance of grouting materials, various erosive media in saline soil environment can easily penetrate traditional grouting materials, thus directly infringing on reinforced concrete structures

Method used

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  • A shield grouting material for severe environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Burn 1235g of river sand, 600g of P.O42.5 ordinary Portland cement, 547g of secondary fly ash, 67g of silica fume (CABR-SF101 sold by China Academy of Building Research), and 383g of functional superfine powder Body material (CABR-SP206 sold by China Academy of Building Research), 16g water-resistant dispersant (polyurethane water-resistant dispersant CABR-RA106 sold by China Academy of Building Research), 88g composite expansion agent (Jianyan Kunlun Technology Co., Ltd. Sales of plastic expansion agent and calcium oxide and magnesium sulfoaluminate composite expansion agent KL-E105), 53g of anti-corrosion rust inhibitor (Nitrite CABR-AP02 sold by China Academy of Building Research), 11g of high-performance water reducer (China The CABR-J1 sold by the Institute of Building Research) was put into a mortar mixer and stirred for 120 seconds to make the materials evenly mixed. Then add the water of 877g and stir for 120 seconds again, make finished material L 1 .

Embodiment 2

[0050] 1500g of river sand, 750g of P.O42.5 ordinary Portland cement, 270g of secondary fly ash, 120g of silica fume (CABR-SF101 sold by China Academy of Building Research), 150g of functional superfine powder Body material (CABR-SP206 sold by China Academy of Building Research), 54g water-resistant dispersant (polyurethane water-resistant dispersant CABR-RA106 sold by China Academy of Building Research), 45g composite expansion agent (Jianyan Kunlun Technology Co., Ltd. Sales of plastic expansion agent and calcium oxide and magnesium sulfoaluminate composite expansion agent KL-E105), 90g anti-corrosion and rust inhibitor (borate inorganic anti-corrosion and rust inhibitor CABR-AP07 sold by China Academy of Building Research), 21g high-performance Put the water reducer (CABR-J1 sold by China Academy of Building Research) into the mortar mixer and stir for 120 seconds to make the materials evenly mixed. Then add the water of 750g and stir for 120 seconds again, make finished ma...

Embodiment 3

[0052] 1235g of river sand, 705g of P.O42.5 ordinary Portland cement, 300g of secondary fly ash, 125g of silica fume (CABR-SF101 sold by China Academy of Building Research), 370g of functional superfine powder Body material (CABR-SP206 sold by China Academy of Building Research), 55g water-resistant dispersant (methylolacrylamide water-resistant dispersant CABR-RA201 sold by China Academy of Building Research), 88g composite expansion agent (Building Research Calcium oxide-calcium sulfoaluminate composite expansion agent KL-E203) sold by Kunlun Technology Co., Ltd., 105g anti-corrosion and rust inhibitor (CABR-AP09 of nitrite organic-inorganic composite anti-corrosion and rust inhibitor sold by China Academy of Building Research), Put 18g of high-performance water reducer (CABR-J1 sold by China Academy of Building Research) into the mortar mixer and stir for 120 seconds to make the materials evenly mixed. Then add the water of 780g and stir for 120 seconds again, make finished...

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Abstract

The invention relates to a shield grouting material for a severe environment and belongs to the technical field of building materials. The shield grouting material is prepared from the following components in percentages by weight: 41-50% of sand, 20-25% of common silicate cement, 9-18% of coal ash, 2-4% of silicon micropowder, 5-13% of a functional sintered superfine powdery material, 0.5-1.8% of a waterproof dispersant, 1.5-3% of a compound expanding agent, 1.8-3% of a corrosion-resistant anti-rust agent and 0.4-0.7% of a high performance water reducer. The shield grouting material for the severe environment, provided by the invention, has the characteristics of being good in flowability, high in strength, low in bleeding rate, excellent in waterproof dispersibility, low in consolidation rate, good in impervious performance, corrosion-resistant and the like.

Description

technical field [0001] The invention relates to a shield grouting material for harsh environments, in particular to a shield grouting material for saline soil environments, and belongs to the technical field of building materials. Background technique [0002] Shield grouting material is a kind of filling grouting material used for filling the building gap between the tunnel body and segment ring in subway shield construction. It has the functions of preventing ground subsidence, stabilizing segment and preventing segment offset. The basic function of the grouting material is to fill the void and stabilize the segment to prevent ground settlement and segment offset. Traditional grouting materials only consider their fluidity, bleeding rate, setting time, consolidation shrinkage and strength, and little attention is paid to the impermeability, corrosion resistance and water dispersion resistance of grouting materials. my country's geological environment is complex and divers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2111/00146C04B2111/00293C04B2111/00706C04B2111/00732C04B2111/20C04B2111/27C04B14/06C04B18/08C04B18/146C04B14/047C04B14/106C04B24/282C04B22/064C04B22/14C04B22/085C04B2103/302C04B2103/0068C04B22/0013C04B24/287C04B2103/61
Inventor 宋普涛王晶周永祥王永海冷发光黄靖夏京亮高超贺阳王祖琦
Owner CHINA ACAD OF BUILDING RES
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