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Water-soluble coagulant for cement-based cementing material and preparation method of water-soluble coagulant

A technology of cementitious material and early setting agent, which is applied in the field of building materials, can solve the problems of lag in setting time and low early strength of cement cementitious materials, and achieve the effect of shortening the interval between initial setting and final setting.

Inactive Publication Date: 2015-03-25
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the technical problem to be solved by the present invention is to provide a method suitable for solving the problem that a single conventional water-reducing agent component cannot solve the problem that the setting time of the cement cementitious material is lagging behind and the early strength is low when the temperature is low in winter. The early setting agent components of a series of problems, the formation of a soluble high-stability early setting agent system with the synergistic effect of multiple components, is the difficulty and key point of the multi-component matching design of the early setting agent

Method used

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  • Water-soluble coagulant for cement-based cementing material and preparation method of water-soluble coagulant
  • Water-soluble coagulant for cement-based cementing material and preparation method of water-soluble coagulant

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Embodiment 1

[0031] For cement A, polysilicic acid flocculant component a is polymeric silicic acid: polyaluminum iron silicate = 8: 2 (mass ratio), and then polysilicic acid flocculant: enhancer: stabilizer: dispersant = 60: The mass ratio of 25:10:5 is to add enhancer, stabilizer, and dispersant, add a certain amount of water, and mix well to obtain a water-soluble early setting agent; the components of the enhancer are: calcium formate: calcium fluoride: silicon Sodium sulfate: aluminum sulfate=40:30:20:10 (mass ratio); wherein the stabilizer is magnesium fluorosilicate; wherein the dispersant is fatty alcohol polyoxyethylene ether, wherein the quality of water is the quality of water-soluble early setting agent 92%.

Embodiment 2

[0033] For cement B, the polysilicate flocculant component a is polyaluminum ferric silicate: polysulphate ferric silicate = 5:5 (mass ratio), and then polysilicate flocculant: enhancer: stabilizer: dispersant = The mass ratio of 70:20:7:3 is added to enhancer, stabilizer, dispersant, add a certain amount of water, mix evenly, and then get water-soluble early setting agent; the additive components are: calcium fluoride: silicic acid Sodium: sodium methyl silicate: aluminum nitrate: iron nitrate = 40:25:15:10:10 (mass ratio); the stabilizer is zinc fluorosilicate; the dispersant component is N-methyl taurine Hydrogenated tallow acid amide: fatty alcohol polyoxyethylene ether = 2:1 (mass ratio), wherein the mass of water is 96% of the mass of the water-soluble early setting agent. .

Embodiment 3

[0035] For cement C, polysilicic acid flocculant component a is polymeric silicic acid: polymeric ferric sulfate sulfate = 6:4 (mass ratio), and then polysilicic acid flocculant: enhancer: stabilizer: dispersant = 55: Add additives, stabilizers, and dispersants in a mass ratio of 25:15:5, add a certain amount of water, and mix well to obtain a water-soluble early setting agent; the additive components are: calcium nitrate: calcium fluoride: silicon Potassium acid: sodium methyl silicate: aluminum sulfate = 20:30:15:15:20 (mass ratio); the stabilizer is ammonium hexafluoroaluminate; the dispersant is N-(2-hydroxypropyl) hydrogenation Tauric acid, wherein the quality of water is 98% of the water-soluble early setting agent quality. .

[0036] Table 1 Fluidity index of cement slurry mm

[0037]

[0038]

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Abstract

The invention provides a water-soluble coagulant for a cement-based cementing material and a preparation method. A solid solute part of the coagulant comprises raw materials in parts by weight as follows: 40-60 parts of a poly-silicic acid flocculating agent, 20-25 parts of an inorganic salt enhancer, 5-15 parts of a stabilizer and 1-5 parts of a dispersing agent. The prepared water-soluble coagulant is high in cost-performance ratio, and the actual engineering problem that the final coagulation time of the cement-based cementing material lags due to the lower temperature in winter and delayed coagulation of a polycarboxylate superplasticizer is solved on the basis of the theory and the nature of cement mineral hydration under the actual condition that the construction period is affected due to the fact that the concrete coagulation time is longer during construction in winter. Compared with like products on the market, the water-soluble coagulant has the advantages that the compatibility of the water-soluble coagulant with the polycarboxylate superplasticizer is higher, liquidity and slump retaining property indexes are not affected, and development of early strength of concrete and reduction of the cost of the superplasticizer are facilitated.

Description

technical field [0001] The invention belongs to the technical field of building materials and is used in winter water-reducing agent technology, in particular to a water-soluble early setting agent for cement-based cementitious materials and a preparation method for compounding with polycarboxylate water-reducing agent. Background technique [0002] Water-soluble early setting agent for cement-based cementitious materials refers to an admixture that can improve the early strength of concrete or shorten the interval between initial setting and final setting or final setting time of cement-based cementitious materials. It is mostly used in winter or emergency repairs. The water-soluble early setting agent of cement-based cementitious materials has no significant effect on the strength of cement-based cementitious materials in the early, middle and late stages. [0003] The same type of products in the market include products such as early strength agents, enhancers, and synerg...

Claims

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Application Information

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IPC IPC(8): C04B24/04C04B24/00
Inventor 柯凯苏英贺行洋颜红专
Owner HUBEI UNIV OF TECH
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