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Preparation method for cement hydration heat regulation and control material with internal curing function

A technology of cement hydration and heat regulation, which is applied in the field of concrete admixtures to achieve the effects of increasing humidity, reducing temperature cracks, and reducing the temperature difference between inside and outside

Pending Publication Date: 2020-04-07
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few patents on the preparation of materials with dual effects of internal maintenance and hydration regulation using starch as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of the cement hydration heat regulating material with internal maintenance function comprises the following steps:

[0034] (1) Mix 20g of wheat starch, 10g of maltodextrin and 40g of water, raise the temperature to 50°C, and stir for 2 hours to make the solution uniform;

[0035] (2) Add 5g of acrylic acid, 1g of 2-acrylamide-2-methylpropanesulfonic acid, and 5g of acrylamide. Mix 1g of sodium carbonate, 2g of sodium persulfate, 1g of N,N'-methylenebisacrylamide with 15g of water, stir evenly and add to the starch paste, continue to react for 6 hours, filter, dry and pulverize to obtain cement with curing function Heat of hydration regulating material.

Embodiment 2

[0037] The preparation method of the cement hydration heat regulating material with internal maintenance function comprises the following steps:

[0038] (1) Mix 10g soluble starch, 20g maltodextrin and 40g water, raise the temperature to 70°C, stir for 4 hours to make the solution uniform;

[0039] (2) Add 1g of acrylic acid, 5g of 2-acrylamide-2-methylpropanesulfonic acid, and 1g of acrylamide. Mix 5g sodium bicarbonate, 1g ammonium persulfate, 0.1g sodium silicate and 16.9g water, stir evenly and add to the starch paste, continue to react for 2 hours, filter, dry and pulverize to get the cement hydration heat control material with curing function .

Embodiment 3

[0041] The preparation method of the cement hydration heat regulating material with internal maintenance function comprises the following steps:

[0042] (1) Mix 15g of tapioca starch, 15g of maltodextrin and 40g of water, raise the temperature to 60°C, and stir for 3 hours to make the solution uniform;

[0043] (2) Add 2.5g of acrylic acid, 2.5g of 2-acrylamide-2-methylpropanesulfonic acid, and 2.5g of acrylamide. Mix 2.5g sodium carbonate, 1.5g sodium persulfate, 0.5g neopentyl glycol diacrylate and 18g water, stir evenly and add to the starch paste, continue to react for 4 hours, filter, dry and pulverize to obtain cement water with curing function Thermoregulation materials.

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Abstract

The invention discloses a preparation method for a cement hydration heat regulation and control material with an internal curing function, which comprises the following steps of: (1) mixing starch anddextrin with water, heating to 50-70 DEG C, and continuing stirring for 2-4 hours to homogenize the solution, and (2) mixing acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, a pHregulator, an initiator and a cross-linking agent with water, uniformly stirring the mixture, adding the mixture into the starch paste, continuously reacting for 2-6 hours, and conducting filtering, drying and crushing to obtain the cement hydration heat regulation and control material with the internal curing function. According to the method, materials dextrin and starch with hydration regulation and control functions are connected with a water-absorbent resin molecular chain with an internal curing function through an addition reaction, the effect of cement hydration regulation and controlis achieved in the early stage, the interior of concrete can be continuously cured in the later stage, and cracks are reduced.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a preparation method of a cement hydration heat regulating material with an internal maintenance function. Background technique [0002] The problem of concrete cracks is a problem that must be faced in any large-scale project. Concrete shrinkage cracks and temperature cracks are two common concrete cracks. [0003] For the shrinkage cracks caused by the reduction of water, the post-maintenance methods such as spraying water, spraying curing agent, covering the curing cloth, etc. are mainly used. There are also ways of doing internal maintenance. Such as patent CN1047886058 discloses a kind of concrete curing agent with core-shell structure, with the high polymer of acrylic acid as the core, polyhydric alcohol, aluminum sulfate, the reactant of epoxy compound is the shell, the preparation method is simple, and the curing agent can effectively Increasing the moistur...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F220/58C08F220/56C08F222/38C08F222/14C04B24/16
CPCC08F251/00C04B24/163
Inventor 储阳王瑞王文彬李磊王育江
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD
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