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A kind of expansion material with slow reaction rate and preparation method thereof

An intumescent material and functional technology, applied in the field of intumescent materials and their preparation, can solve problems such as insufficient expansion performance, and achieve the effects of improving hydration, slowing down the acceleration effect, and reducing the amount of use

Active Publication Date: 2022-07-12
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that the existing packaged expansion agent expands too fast when the concrete temperature rises and falls relatively rapidly, the expansion performance cannot be fully exerted. Applications of Slow Reaction Rate Expandable Materials

Method used

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  • A kind of expansion material with slow reaction rate and preparation method thereof
  • A kind of expansion material with slow reaction rate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 100 parts of boric acid, 400 parts of pregelatinized starch, and 1100 parts of water were added to form a homogeneous solution, and spray-dried to obtain a control admixture with slow and controlled release function.

Embodiment 2

[0042] 100 parts of dextrin, 150 parts of pre-gelatinized starch, and 700 parts of water were added to form a homogeneous solution, and spray-dried to obtain a control admixture with slow and controlled release function.

Embodiment 3

[0044] 100 parts of borax, 400 parts of pre-gelatinized starch, and 580 parts of water were added to form a homogeneous solution, and spray-dried to obtain a control admixture with slow and controlled release function.

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Abstract

The invention belongs to the field of building materials, in particular to an expansion material with a relatively slow reaction rate and a preparation method thereof. By bonding traditional sulfoaluminate expansion agents with regulatory admixtures. Through the bonding effect of the binder, the distribution of the admixture in the expansion agent and the cement matrix is ​​improved, and the concentration of the control admixture around the expansion agent particles is increased. Only part of the control admixture will diffuse into the cement matrix, so the control admixture The hydration of the expansive agent is more to affect the hydration of the expansion agent than the hydration of the cement.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to an expansion material with a relatively slow reaction rate and a preparation method thereof. Background technique [0002] Concrete cracks are the most common engineering diseases in civil engineering, water conservancy, bridges and other projects, and more than 80% of the cracks are deformation cracks, such as self-shrinkage, drying shrinkage, temperature shrinkage, etc. [0003] At present, there are many kinds of admixtures to reduce concrete shrinkage. For example, Chinese patent CN 200710053035.1 discloses that shrinkage can be reduced by internal curing of water-absorbent resin. Chinese patent CN201410010473.X discloses a material for regulating cement hydration, thereby controlling temperature rise and reducing temperature shrinkage. [0004] In addition, it is also a common technical means to solve the shrinkage cracking of concrete by using the volume expansion generated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B40/0046C04B22/0013C04B24/38C04B22/002C04B24/383C04B24/02C04B22/142Y02W30/91
Inventor 王文彬王育江刘加平姚婷张守治王倩张敏
Owner JIANGSU SOBUTE NEW MATERIALS