Cement-based ultra-high strength contraction-free grouting concrete

A non-shrinkage, grouting material technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems that cement-based grouting materials cannot meet the requirements, materials do not have fluidity, and do not have on-site application

Active Publication Date: 2010-12-22
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN1458113A discloses a high-performance non-shrinkage cement-based grouting material and its preparation method, but does not specify the compressive strength that can be achieved by the cement-based grouting material prepared according to this method; Chinese patent CN101134663A discloses a non-shrinkage grouting material material, its 28d compressive strength can only reach 71.5MPa; Chinese patent CN1271696A discloses a high-strength superfluid expansion cement grouting material, its 28d compressive strength can reach 90MPa, but the 1d compressive strength is only 20MPa
Chinese patent CN1039788A

Method used

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  • Cement-based ultra-high strength contraction-free grouting concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select 100kg of aluminate cement, 5kg of calcium oxide expansion agent, 50kg of 1-3mm quartz sand, 0.9kg of polycarboxylate superplasticizer, 0.3kg of polyether modified silicon, 0.1kg of fumed silica, ordinary steel fiber (diameter 0.5 mm, length 6mm) 8kg, tartaric acid 0.5kg, hydroxyethyl methyl cellulose ether 0.1kg. Mix the above-mentioned various raw materials evenly to obtain a cement-based ultra-high-strength non-shrinkage grouting material with high fluidity.

Embodiment 2

[0022] Select 100kg of Portland cement, 10kg of ettringite expansion agent, 100kg of 1-3mm quartz sand, 0.5kg of melamine water reducer, 1kg of dimethyl silicone oil defoamer, 0.3kg of modified bentonite, indented steel fiber (diameter 0.8 mm, length 9mm) 30kg, sodium gluconate 0.02kg, low viscosity methyl cellulose ether 0.15kg. Mix the above-mentioned various raw materials evenly to obtain a cement-based super high-strength non-shrinkage grouting material with large expansion.

Embodiment 3

[0024] Select 20kg of aluminate cement, 80kg of Portland cement, 6kg of ettringite expansion agent, 80kg of 0.5-3mm quartz sand, 1.0kg of polycarboxylate superplasticizer, 0.4kg of polyether modified silicon, and 0.2kg of modified bentonite. Ordinary steel fiber (diameter 0.2mm, length 5mm) 10kg, tartaric acid 1kg, low viscosity methyl cellulose ether 0.3kg. By mixing the above-mentioned various raw materials evenly, a cement-based ultra-high-strength non-shrinkage grouting material with moderate fluidity, moderate expansion and the highest compressive strength can be obtained.

[0025] The various index performances of embodiment 1-3 are as follows

[0026]

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Abstract

The invention provides a cement-based ultra-high strength contraction-free grouting concrete which is composed of cement, quartz sand, water reducer, swelling agent, defoamer, anti-settling agent, steel fiber, retarder and water-retaining agent in parts by weight: 100 parts of cement, 5-10 parts of swelling agent, 50-100 parts of quartz sand, 0.5-2.5 parts of water reducer, 0.3-1.0 part of defoamer, 0.1-0.3 part of anti-settling agent, 5-30 parts of steel fiber, 0-1.0 part of retarder and 0.1-0.3 part of water-retaining agent. The invention has the following beneficial effects: (1) at the normal temperature, the 1d compression strength of the cement-based grouting concrete is improved to be above 70 MPa; (2) at the normal temperature, the 28d compression strength of the cement-based grouting concrete is improved to be above 120 MPa; and (3) the cement-based ultra-high strength contraction-free grouting concrete can be used for installing large, ultra-large equipment basis, and can be used for occasions, such as bolt anchoring, structure fastening, road repair and the like which have high requirements on the compression strength of grouting concrete.

Description

technical field [0001] The invention relates to a cement-based non-shrinkage grouting material, in particular to a cement-based ultra-high-strength non-shrinkage grouting material that can be used for equipment installation, bolt anchoring, engineering reinforcement, road surface repair and the like. Background technique [0002] Cement-based grouting material is a special construction dry powder mortar with cement, sand, admixture, etc. as the main raw materials. After being evenly mixed in the factory, it is transported to the site and can be used directly after adding water and mixing. It has good durability, high fluidity, and high strength. , No shrinkage and other advantages, it is the material of choice for industrial equipment installation, bolt anchoring, engineering reinforcement, etc. In 2008, China issued the national standard GB / T 50448-2008 "Technical Specifications for the Application of Cement-based Grouting Materials" on cement-based grouting materials. The ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06C04B14/48C04B111/70
CPCC04B28/06C04B2111/70C04B2111/0075C04B2111/00715C04B2201/52Y02W30/91C04B7/02C04B14/06C04B14/48C04B18/146C04B20/0076C04B22/008C04B2103/22C04B2103/302C04B2103/46C04B2103/50C04B14/104C04B22/064C04B24/06C04B24/2641C04B24/383C04B24/42C04B22/148C04B24/223
Inventor 仲朝明邵正明李树利杨晓光王晓丰高汉青
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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