Cement accelerator

A coagulant and cement technology, which is applied in the field of cement coagulant, can solve the problems of mud rheology decrease, cement slurry thickening, flash coagulation, etc., and achieve the effect of improving dispersion retention ability, promoting coagulation, and preventing flash coagulation

Inactive Publication Date: 2018-08-14
赵顺全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a cement coagulant in view of the problems that the current cement coagulant mainly composed of calcium chloride will thicken the cement slurry, reduce the rheology of the mud, and even cause flash coagulation.

Method used

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  • Cement accelerator

Examples

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preparation example Construction

[0019] The preparation method of the additive solution is as follows: take eighteen hydrated aluminum sulfate, add polyacrylamide and water to mix at a mass ratio of 15:3:10, stir and mix at 35~45°C for 2~3 hours, then add eighteen hydrated aluminum sulfate with a mass of 40~ 50% calcium oxide, heat up to 60~65°C, keep at 1500r / min high-speed shear for 1~3h to obtain a mixture, take sodium hydroxide and add water at a mass ratio of 1:10, then add sodium hydroxide with a mass of 5~8 Double the mixture, heat it up to 70-80°C for 3-4 hours, filter with suction, and take the filtrate to obtain the additive solution.

[0020] The preparation method of coagulant matrix thing comprises the steps:

[0021] (1) According to the number of parts by mass, take 5~8 parts of acrylic acid, 2~4 parts of α-hydroxyethyl acrylate, 0.3~0.5 parts of dimethyldiallyl ammonium chloride, 20~30 parts of water, in 45 Stir and mix at ~50°C for 1~2h to obtain the mixed solution A. According to the number...

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Abstract

The invention discloses a cement accelerator and belongs to the field of buildings. According to the cement accelerator disclosed by the invention, a substance with a cement accelerating effect is prepared by taking aluminum sulfate octadecahydrate and calcium oxide as raw materials and carrying out high-speed shearing; lithium slag is used as a raw material, is subjected to microwave treatment and is enabled to have more free lithium salts and the like, so that condensation of cement concrete can be promoted and the initial set time is shortened; in addition, alumina and calcium sulfate in the lithium slag also react to generate calcium sulphoaluminate hydrate, so that early strength can be improved; bamboo fibers are added for compounding and raw bamboo fibers are doped, so that the volume shrinkage stress is digested, and further cracks are reduced; the breaking strength of cement-based mortar is improved along with the increase of the doping amount of the raw bamboo fibers; the anti-cracking and compressive strength of the cement slurry at later stage is improved, and further the quality of cement is improved.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a cement coagulant. Background technique [0002] Coagulant is an additive used in building mortar and building concrete, and can also be used as a processing aid for oil and natural gas extraction. It is especially suitable for the sewer pipes, heat insulation layers of cement products, cement prefabricated parts and cement road repairs, etc., which require rapid solidification and accelerated mold utilization and turnover. It has the characteristics of quick setting, accelerating setting, early strength and good operability of cement products. It can significantly accelerate the hardening speed of cement, shorten the setting time and increase the early strength of cement products. [0003] At present, the main coagulant accelerators in China are inorganic salts. The main component of most coagulant accelerators is sodium aluminate. Other inorganic salts with coagulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C08F283/06C08F220/06C04B103/12
CPCC04B40/0039C04B2103/12C08F283/065C04B24/383C04B24/2611C04B24/00C04B24/122C04B22/148C04B22/064C04B24/2652C04B22/0006C04B24/28C08F220/06
Inventor 赵顺全庄文琴刘红妹
Owner 赵顺全
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