Jet concrete fast hardening agent

A technology of sprayed concrete and quick-setting agent, which is applied in the field of concrete quick-setting agent, can solve the problems of high production cost, increased power consumption, high rebound rate, etc., and achieve the effects of reducing production cost, ensuring later strength and reducing pollution

Inactive Publication Date: 2004-03-03
徐州华泰混凝土外加剂厂
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Problems solved by technology

[0002] The known quick-setting agent for shotcrete is made by adding lead-oxygen clinker to high-temperature calcined alum stone, alum mud, gypsum and other mixed materials, which leads to low strength of concrete in the later stage and high rebound rate. To meet the requirements of construction technology, the quality of the project cannot be guaranteed; at the same time, due to the need to calcinate alunite at high temperature, the power consumption is increased, resulting in higher production costs

Method used

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Embodiment Construction

[0007] 35 kg of bauxite, 24 kg of soda ash, 30 kg of lime, and 11 kg of coal are made into raw meal, which is ground into a powder with a fineness of less than 15% through a large-scale ball mill of 1.5 meters, which is then pelletized into about 15mm It is calcined in a blast furnace at a high temperature (1250℃) to produce aluminum oxide clinker. Take 50 kilograms of aluminum oxide clinker and 50 kg of boiling slag, mix them evenly, and grind them into a 1.5-meter ball mill into powder with fineness. 15% less is enough. The water content is less than 2%, the initial setting time of the pure slurry is less than 3 minutes, the final setting is less than 5 minutes, and the 1-day compressive strength is greater than 10Mpa.

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Abstract

A quick-setting agent for sprayed concrete is prepared from bauxite, sodium carbonate, lime stone and coal through proportional mixing, grinding, calcining at 1250 deg.C, proportionally mixing it with slags of fluidizing furnace, stirring, and grinding. Its advantages are high effect and low cost.

Description

Technical field [0001] The invention relates to a concrete quick-setting admixture, in particular to a sprayed concrete quick-setting admixture used in the construction of mines, tunnels, subways and the like. Background technique [0002] The known accelerator for shotcrete is made by adding lead-oxygen clinker to mixed materials such as alumite, alum mud, and gypsum that have been calcined at a high temperature. As a result, the late-stage strength of the concrete is low, and the rebound rate is high. Adapting to the requirements of the construction process, the quality of the project cannot be guaranteed; at the same time, the high temperature calcination of alunite increases the power consumption, resulting in higher production costs. Summary of the invention [0003] The purpose of the present invention is to provide a shotcrete accelerator produced by using waste boiling slag from a power plant, which greatly re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/10C04B22/00
CPCC04B7/32C04B2103/12C04B2111/00155C04B40/0039Y02P40/121Y02W30/91C04B7/425C04B7/43C04B18/067C04B28/02
Inventor 高晓云奚修道王振奎王宏恩
Owner 徐州华泰混凝土外加剂厂
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