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A kind of accelerator auxiliary material based on composite polymer flocculant and preparation method thereof

A technology of auxiliary materials and flocculants, which is applied in the field of accelerator auxiliary materials based on composite polymeric flocculants and its preparation, can solve the problems of incompleteness and the inability of accelerators to adapt to the irregular volume changes of various cements and cement mortars, etc. , to achieve good social and economic benefits, stable and effective products, simple and clear process

Inactive Publication Date: 2018-07-24
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the adaptability of accelerators to different cement varieties, adaptability to different types of external admixtures, irregular changes in setting time with the amount of mixing, quick-setting effects at different temperatures, and irregular changes in the volume of cement mortar is not perfect.
[0003] Due to the complex variety of cement and admixtures in my country, it is impossible for the existing cement to fully meet the requirements of gypsum and C 3 Matching requirements of A, for low activity cement, low C 3 A cement, low C 3 S content cement, low surface area cement, the existing quick-setting agent can not be used for a variety of cements suitable for the site

Method used

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preparation example Construction

[0043] A method for preparing quick-setting agent auxiliary materials based on composite polymer flocculants, the specific steps are as follows:

[0044] 1) preparing polyferric aluminum sulfate;

[0045]2) Preparation of polymeric silicic acid: adding a solution containing sodium silicate to the acid to make the pH of the mixed solution 2.0, stirring, and static aging to obtain a polymeric silicic acid solution. Preferably, the solution containing sodium silicate is added to the nitric acid, so that the pH of the mixed solution is 2.0.

[0046] 3) Slowly add polymeric silicic acid to the polymeric ferric aluminum sulfate solution under high-speed stirring, and polymerize at room temperature for 30 minutes to obtain polymeric aluminum ferric sulfate;

[0047] 4) Mix and stir 30-55% polyaluminum ferric silicate, 2-20% early-strength reinforcing agent, 2-10% late-age reinforcing agent, and the rest of the water to obtain quick-setting based on composite polymeric flocculant Ag...

Embodiment 1

[0052] Put 320g of polymerized aluminum ferric silicate and 450g of water that meet the requirements in the reaction container, start the stirrer, add 100g of sodium thiocyanate and 50g of triethanolamine in sequence, after stirring evenly, slowly add 50g of sodium gluconate and 300g of triethanolamine Isopropanolamine, after stirring continuously for 30 minutes, the finished product is obtained after standing still.

Embodiment 2

[0054] Add 500g of ferrous sulfate heptahydrate into a four-necked flask, add 42g of homemade aluminum sulfate and 500g of tap water in sequence in proportion, pass in oxygen and stir. At the same time, 27.5 g of catalyst aluminum nitrate was added dropwise with a constant pressure separatory funnel. 50g of sulfuric acid is added in batches, the stirring speed is 100-150r / min, stirring firstly and then slowly, and reacting at a suitable temperature for 50-55min to obtain a reddish-brown polyferric aluminum sulfate solution.

[0055] Put the above-mentioned polyaluminum ferric silicate solution with a solid content of 400g and 400g of water in the reaction container, start the stirrer, add 50g of triethanolamine and 100g of sodium thiosulfate in sequence, and after stirring evenly, slowly add 20g of diethanol monoiso Propanolamine, after stirring continuously for 30 minutes, the finished product is obtained after standing still.

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Abstract

The invention discloses an accelerator auxiliary material based on a composite polymerized flocculating agent and a preparation method thereof. The accelerator auxiliary material includes the components of poly aluminum ferric silicate-sulfate (PAFSS), an early-strength type reinforcing agent, a rear age reinforcing agent and the balance of water. The preparation method includes the steps that a poly ferric-aluminous-sulphate solution is prepared, a polymeric silicic acid solution is added into the poly ferric-aluminous-sulphate solution to be subjected to polymerization reaction for 30 minutes according to the (Al+Fe) / Si molar ratio, the early-strength type reinforcing agent, the rear age reinforcing agent and the water are mixed and stirred, and then the accelerator auxiliary material is obtained. With an aluminous component, a rich-silicon component and a sulfuric acid component being main components, a stabilizer and inorganic acid are added, and the aluminous coagulation accelerating component makes cement slurry rapidly condensed and hardened; the rich-silicon reinforcing component snatches C-S-H gel in the slurry, and under the joint flocculating interaction of the rich-silicon reinforcing component, hydrated calcium aluminate and ettringite, the slurry forms a remote coagulation structure more easily, and therefore the early and late period strength of a cement-based binding material is improved. The preparation technology is simple, and adaptability is good.

Description

technical field [0001] The invention relates to the technical field of chemical industry of cement-based cementitious materials, in particular to a quick-setting agent auxiliary material based on a composite polymer flocculant and a preparation method thereof. Background technique [0002] Alkali-free and chlorine-free accelerator not only significantly improves the early strength of concrete, but also has no negative impact on the later strength of concrete, and can also improve the durability of concrete. It is a kind of accelerator with excellent performance. The research on the adaptability of accelerators to different cement varieties, adaptability to different types of external admixtures, irregular changes in setting time with the amount of mixing, quick-setting effects at different temperatures, and irregular changes in the volume of cement mortar is not perfect. . [0003] Due to the complex variety of cement and admixtures in my country, it is impossible for the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B24/06C04B103/12
CPCC04B40/0039C04B2103/12C04B22/149C04B22/14C04B24/122C04B24/06
Inventor 柯凯江波贺行洋苏英常鹰代飞兰蒙
Owner HUBEI UNIV OF TECH
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