Preparation method of grouting material

A technology for pressing slurry and raw materials, which is applied in the field of preparation of pressing slurry, which can solve the problems of long setting time of slurry, insufficient strength, poor rust resistance, etc., and achieve the effect of improving final setting time, uniform distribution and compact structure

Inactive Publication Date: 2018-09-07
俞小峰
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of the press slurry in view of the problems that the current press slurry has poor rust resistance, insufficient strength, and long coagulation time of the slurry in a negative temperature environment

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  • Preparation method of grouting material

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preparation example Construction

[0024] A kind of preparation method of grouting material, this preparation method comprises the steps:

[0025] (1) According to the mass ratio of 1:5~6, mix the papermaking black liquor and concentrated sulfuric acid with a mass fraction of 70~78%, let it stand for 1~2h, filter, and obtain the filter residue according to the mass ratio of 10~15:1~2 , put the filter residue and sulfonating agent in the reaction kettle, pass in steam, mix at a temperature of 70-80°C for 1-2 hours, take it out, and air-dry naturally to obtain an air-dried product;

[0026] (2) In parts by weight, take 10~15 parts of air-dried matter, 2~3 parts of sodium sulfite, 1~2 parts of formaldehyde, 1~2 parts of hydrogen peroxide, 1~2 parts of acrylic acid, and 0.04~0.06 parts of ammonium persulfate , mix the air-dried material and hydrogen peroxide, oxidize at a temperature of 70~80°C for 1~2h, add ammonium persulfate and acrylic acid for grafting for 1~2h, raise the temperature to 80~90°C, and adjust the...

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Abstract

The invention discloses a preparation method of a grouting material and belongs to the field of buildings. A water reducing agent with relatively good water solubility and surface activity is preparedby utilizing papermaking black liquid and a lubricating effect of bubbles is generated so that the flowability of concrete is improved and the workability becomes good; the air entraining content ofthe concrete is increased due to the foaming property and the strength is reduced; meanwhile, modification is carried out, and almost reducing sugars are oxidized in an oxidization process, so that the final condensation time is improved; free groups are formed by hydrogen peroxide and grafting polymerization reaction is easy to carry out, so that the content of carboxyl is increased and the waterreduction rate is improved, and furthermore, the strength of the concrete is improved; anionic and non-ionic surfactants are also added and compounded, so that a sulfonation reaction product is moredensely adsorbed on the surfaces of cement particles. By adopting the preparation method disclosed by the invention, the problems of a current grouting material that the antirust performance is relatively poor, the strength is not high enough and the condensation time of slurry under a negative-temperature environment is long are solved.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a method for preparing grout. Background technique [0002] Pressing grout is a product specially used for post-tensioned prestressed pipe (hole) grouting construction. It is optimized from a variety of high-quality cement-based materials and high-performance admixtures. It has excellent fluidity, stable slurry, and filling degree. Good, adjustable setting time, no shrinkage, micro-expansion, high strength, no harmful substances to steel bars, etc. Prestressed concrete is widely used in bridge structures because of its unique economic and technical advantages. Grouting of tunnels is a key process in prestressed concrete construction. Its main function is to protect the prestressed steel strands from being exposed and avoid corrosion; It is to make the prestressed steel strand and concrete well combined to ensure the effective transmission of prestress, so that the prestre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C08F8/36C08F289/00C08F220/06
CPCC04B28/04C04B2201/50C08F8/36C08F289/00C08F220/06C04B24/2623C04B24/161C04B24/16C04B24/32C04B24/42C04B24/18C04B22/124C04B22/085C04B18/08C04B22/064C04B24/085C04B24/123C04B24/04C04B24/122C04B24/38
Inventor 俞小峰徐扣华杨颖
Owner 俞小峰
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