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Jet concrete fast hardening agent

A technology of shotcrete and quick-setting admixture, applied in the field of concrete quick-setting admixture, can solve the problems of increased power consumption, high production cost and high rebound rate, and achieve the effects of ensuring later strength, reducing production cost and saving electric energy

Inactive Publication Date: 2005-03-30
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] Mix 35kg of bauxite, 24kg of soda ash, 30kg of limestone, and 11kg of coal into raw meal, pass through a 1.5-meter large ball mill, grind it into a powder with a fineness of less than 15%, and pass it into balls and discs to form a powder of about 15mm The spherical shape is calcined in a blast furnace at high temperature (the furnace temperature is 1250°C) to produce alumina clinker. Take 50 kg of alumina clinker and 50 kg of boiling slag, stir them evenly, and then enter a 1.5-meter ball mill to grind them into powder. The fineness Just 15% smaller. The water content is less than 2%, the initial setting time of the clean slurry is less than 3 minutes, the final setting is less than 5 minutes, and the compressive strength of 1 day 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 agent, in particular to a sprayed concrete quick-setting agent used in the construction of mines, tunnels, subways and the like. Background technique [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 the construction process, the quality of the project cannot be guaranteed; at the same time, because the alunite needs to be calcined at high temperature, the power consumption is increased, resulting in higher production costs. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a sprayed concrete quick-setting agent produced by using waste boiling slag of a power plant, which great...

Claims

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Application Information

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Patent Type & Authority Patents(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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