A kind of steel sleeve grouting material containing copper tailings sand and its proportion setting method
A steel sleeve and copper tailings technology, applied in the field of building materials, can solve problems such as ecological and environmental pollution, and achieve the effect of improving gradation and good fluidity
Active Publication Date: 2022-03-01
中冶建工集团重庆混凝土工程有限公司
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Problems solved by technology
[0010] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method that not only realizes the early strength and high strength of alkali slag cement when preparing the steel bar connection sleeve grouting material, but also effectively improves the high performance of the sleeve grouting material. Copper-containing tailings material sand reinforcement sleeve grouting material and its ratio setting method that effectively solve the pollution problem caused by industrial solid waste copper tailings material stockpiling to the ecological environment
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[0059] The present invention will be described below in conjunction with the accompanying drawings and embodiments.
[0060] This embodiment: a steel sleeve grouting material containing copper tailings sand, including dry powder and alkali activator solution, wherein the dry powder includes blast furnace slag powder, fly ash beads, naphthalene-based water reducer, plastic Expansion agent, river sand and copper tailings material, alkali activator solution includes water glass, barium nitrate, sodium hydroxide and water.
[0061] Among them, calculated according to the weight percentage, the blast furnace slag powder is 30%-50%, the fly ash pellets are 3%-8%, the naphthalene-based water reducing agent is 0.2%-0.8%, the plastic expansion agent is 0.04%-0.09%, the river Sand 30%-50%, copper tailings 5%-15%, water glass 2%-4%, sodium hydroxide 0.3%-1%, barium nitrate 0.1%-0.3%, water 8%-15%, and The particle size of the river sand is 0-2.36 mm, preferably 2.36 mm.
[0062] As a p...
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Abstract
The invention discloses a steel sleeve grouting material containing copper tailings material sand and a method for setting the ratio thereof, comprising a dry powder material and an alkali activator solution, wherein the dry powder material includes blast furnace slag powder and fly ash pellets , naphthalene-based water reducer, plastic expansion agent, river sand and copper tailings material, the alkali activator solution includes water glass, barium nitrate, sodium hydroxide and water, this scheme is made of alkali slag as the cementing material Grouting material is a new type of grouting material. Since the space of the sleeve is relatively small, to ensure that the grouting material is completely filled in the cylinder, it must have good fluidity. It is stipulated in the standard specification that its initial fluidity must be ≥ 300mm, 30min Fluidity must be ≥ 260mm. Therefore, this solution is stabilized by naphthalene-based water reducer, sodium hydroxide, copper tailings, fine-grained blast furnace slag powder, fly ash beads, plastic expansion agent, and river sand admixture Setting time and workability of alkali-activated slag sleeve grout.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to a steel sleeve grouting material containing copper tailings sand and a method for setting the ratio thereof. Background technique [0002] In prefabricated buildings, steel bar connection technology is a key factor affecting the prefabricated concrete structure, which is related to the safety and service life of the entire prefabricated building. Sleeve grouting is the most widely used steel bar connection technology at present, and the performance of sleeve grouting material is an important factor affecting the safety and durability of the entire structure. [0003] Most of the grouting materials used in the project at this stage are mainly divided into the following three categories: [0004] (1) Ordinary Portland cement is the main cementitious material for grouting, and expansion components need to be added to compensate for the shrinkage of cement during hydratio...
Claims
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IPC IPC(8): C04B28/00C04B111/70
CPCC04B28/006C04B2201/50C04B2111/70C04B18/141C04B18/08C04B14/06C04B18/12C04B22/00C04B22/062C04B22/085C04B2103/302C04B2103/0068
Inventor 班克成余林文杨长辉常仕文胡星袁慧慧李阳孙钰璇
Owner 中冶建工集团重庆混凝土工程有限公司