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An early strength agent for ordinary Portland cement fiberboard

A technology of ordinary Portland cement and early strength agent, applied in the field of building materials, can solve the problems of long demoulding time and affecting production efficiency, and achieve the effects of shortening demoulding time, improving work efficiency and reducing slump volume.

Active Publication Date: 2018-01-30
ZHUODA NEW MATERIALS TECH GRP WEIHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an early strength agent for ordinary Portland cement fiberboard, so as to overcome the shortcomings of the existing ordinary Portland cement fiberboard, which takes a long time to demould and seriously affects the production efficiency.

Method used

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  • An early strength agent for ordinary Portland cement fiberboard
  • An early strength agent for ordinary Portland cement fiberboard

Examples

Experimental program
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Effect test

Embodiment 1

[0020] An early strength agent for ordinary portland cement fiberboard, in parts by weight, said early strength agent comprising: 1 part of calcium sulfate, 1 part of nitrous acid, 1 part of calcium nitrate, 1 part of urea, sodium chloride 4 parts, 0.8 parts of ethylenediaminetetraacetic acid, 4 parts of calcium carbonate, 7 parts of sodium fatty acid methane sulfonate, 70 parts of high alumina cement, 8 parts of sodium sulfate, 6 parts of sodium silicate, 7 parts of ferrous sulfate, stearin 3 parts of calcium oxalate, 4 parts of hydroxyethyl methylcellulose, 4 parts of ethyl cellulose, 8 parts of triethanolamine and 7 parts of calcium oxalate.

[0021] When in use, the mass ratio of the accelerator to ordinary Portland cement is 6:100.

Embodiment 2

[0023] An early strength agent for ordinary Portland cement fiberboard, in parts by weight, the early strength agent includes: 0.5 parts of potassium sulfate, 0.5 parts of calcium nitrate, 1 part of sodium chloride, 0.5 parts of ethylenediaminetetraacetic acid 5 parts of calcium carbonate, 5 parts of sodium fatty acid methyl ester sulfonate, 50 parts of high alumina cement, 10 parts of sodium sulfate, 10 parts of sodium silicate, 5 parts of ferrous sulfate, 5 parts of calcium stearate, carboxymethyl fiber 5 parts of prime, 10 parts of triisopropanolamine and 10 parts of calcium formate.

[0024] When in use, the mass ratio of the accelerator to ordinary Portland cement is 10:100.

Embodiment 3

[0026] An early strength agent for ordinary Portland cement fiberboard, in parts by weight, the early strength agent comprises: 2 parts of potassium sulfate, 2 parts of calcium sulfate, 1 part of nitrous acid, 5 parts of sodium chloride, 1 part of diaminetetraacetic acid, 1 part of calcium carbonate, 10 parts of sodium fatty acid methyl ester sulfonate, 80 parts of high alumina cement, 5 parts of sodium sulfate, 5 parts of sodium silicate, 5 parts of ferrous sulfate, 1 part of calcium stearate , 10 parts of hydroxyethyl cellulose, 5 parts of triethanolamine and 5 parts of calcium oxalate.

[0027] When in use, the mass ratio of the accelerator to ordinary Portland cement is 5:100.

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Abstract

The invention discloses an early strength agent used for ordinary Portland cement fiberboards. The early strength agent at least comprises one or more of sodium sulfate, potassium sulfate, calcium sulfate, nitrous acid, calcium nitrate and urea, sodium chloride, ethylenediaminetetraacetic acid, calcium carbonate and sodium fatty acid methyl ester sulfonate. The early strength agent used for ordinary Portland cement fiberboards has the beneficial effects that various components can give play to synergistic and complementary effects; the compressive strength ratio is more than or equal to 200% in 1 day, so that the demolding requirements of the ordinary Portland cement fiberboards are met, the collapse quantities of the cement fiberboards in the demolding process are also reduced and the demolding time is shortened, thus improving the work efficiency.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an early strength agent for ordinary Portland cement fiber boards. Background technique [0002] Fiber cement board, also known as fiber cement board. It is a new type of building material made of silicon and calcareous materials as the main raw materials, adding plant fibers, pulping, extracting, pressurizing, and curing. The cement fiberboard produced by high pressure is also called fiber cement pressure board, and its performance is better than that of unpressurized cement fiberboard. [0003] The early strength agent refers to the admixture that can improve the early strength of concrete and has no significant effect on the later strength. The main function of early strength agent is to accelerate the hydration rate of cement and promote the development of early strength of concrete. It not only has the function of early strength, but also has the function of water reduct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B7/32C04B22/08C04B22/10C04B22/12C04B22/14C04B24/04C04B24/08C04B24/12C04B24/16
CPCC04B40/0039C04B2103/0068C04B22/142C04B22/085C04B24/126C04B22/124C04B24/123C04B22/10C04B24/161C04B7/32C04B22/08C04B22/149C04B24/08C04B24/386C04B24/122C04B24/04C04B28/04
Inventor 杨卓舒陈强孙吉利余中华邹阳陈展庆月
Owner ZHUODA NEW MATERIALS TECH GRP WEIHAI CO LTD
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