Hydration heat regulating and controlling material as well as preparation method and application thereof

A heat of hydration and cementitious material technology, applied in the field of concrete admixtures, can solve the problems of severe retardation, strength reduction, limited ability to suppress heat of hydration, etc., and achieve the effect of simple and easy preparation method and improved inhibition ability

Active Publication Date: 2014-04-23
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the various shortcomings of the heat of hydration suppression materials reported so far: the heat of hyd

Method used

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  • Hydration heat regulating and controlling material as well as preparation method and application thereof
  • Hydration heat regulating and controlling material as well as preparation method and application thereof
  • Hydration heat regulating and controlling material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] 1000g of dextrin with a number average molecular weight of 84000g / mol and a size of 700um is added to 2000g of water, 0.12g of epichlorohydrin is added, pH is adjusted to 10 with NaOH, the temperature is raised to 45°C and reacted for 12 hours, separated and dried to obtain a white powder. That is, the dextrin described in the present invention.

Example Embodiment

[0036] Example 2

[0037] Except that the size of dextrin used is 100um, the others are the same as in Example 1.

Example Embodiment

[0038] Example 3

[0039] Except that the size of dextrin used is 10um, the others are the same as in Example 1.

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Abstract

The invention relates to the field of concrete admixtures and particularly relates to a hydration heat regulating and controlling material as well as a preparation method and an application thereof. According to the material with a hydration heat regulating and controlling function, a component is surface cross-linked dextrin prepared by a cross-linking reaction. The invention discloses the hydration heat regulating and controlling material which can greatly regulate and control the hydration speed of cement, reduce the temperature rise of concrete and does not influence the middle-period and post-period strength of the concrete.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a hydration heat regulating material and a preparation method thereof. Background technique [0002] Cement hydration will release a lot of heat. When the heat released by cement hydration in concrete is too late to dissipate, the internal temperature of concrete will rise, and when the hydration stops later, the concrete temperature will drop to ambient temperature; this temperature The change will cause the volume of concrete to change, and under constrained conditions, it will lead to concrete cracking, which will affect the durability and safety of concrete components. [0003] In order to reduce the temperature change in concrete, it is necessary to regulate the hydration process of cement, and reduce the hydration speed of cement as much as possible during the acceleration period, so that the heat generated by cement hydration will not be released in a concentrated manner...

Claims

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Application Information

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IPC IPC(8): C08B31/00C08J3/24C04B24/38
Inventor 刘加平王文彬李磊田倩王育江王洪松王瑞
Owner JIANGSU SOBUTE NEW MATERIALS
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