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Microcapsule for self-repair concrete and preparation method of self-repair concrete

A technology for microcapsules and concrete, applied in the directions of microcapsule preparation and microsphere preparation, etc., can solve the problems of inability to track the development of cracks in time, poor intelligence, etc., and achieve the effect of easy implementation and simple preparation process operation.

Inactive Publication Date: 2015-09-30
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But all there is very big limitation in the method for above-mentioned concrete crack self-healing
For example: poor intelligence, unable to track the development of cracks in time and make timely repairs
This makes the repair effect of concrete cracks, crack control and long-term monitoring a great disadvantage

Method used

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  • Microcapsule for self-repair concrete and preparation method of self-repair concrete
  • Microcapsule for self-repair concrete and preparation method of self-repair concrete
  • Microcapsule for self-repair concrete and preparation method of self-repair concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Preparation of ethyl cellulose-coated sulphoaluminate self-healing concrete

[0047] Microcapsule preparation:

[0048] 1) Capsule core preparation:

[0049] Capsule core raw material mass ratio (parts by weight):

[0050] recipe number

Sulphoaluminate cement

microcrystalline cellulose

Tween 80

30% ethanol

Formulation Ⅰ

100

90

8

100

Formulation II

100

90

10

110

Formula III

100

95

9

110

Formula IV

100

95

10

115

Formulation V

100

100

10

120

[0051] Wherein, 30% ethanol refers to ethanol with a concentration of 30% by volume.

[0052] According to the mass ratio of the above five kinds of capsule core formula raw materials, the obtained mixture is respectively put into the extrusion equipment for extrusion and thinning, and the rice strip-shaped capsule core material is extruded, and the rice strip-shaped capsule co...

Embodiment 2

[0069] Example 2: Preparation of polystyrene-wrapped sulphoaluminate self-healing concrete

[0070] Microcapsule preparation:

[0071] 1) Capsule core preparation:

[0072] Capsule core raw material mass ratio (parts by weight):

[0073] recipe number

Sulphoaluminate cement

microcrystalline cellulose

Tween 80

30% ethanol

Formulation Ⅰ

100

90

8

100

Formulation II

100

90

10

110

Formula III

100

95

9

110

Formula IV

100

95

10

115

Formulation V

100

100

10

120

[0074] According to the mass ratio of the raw materials of the above five capsule core formulations, put the obtained mixture into the extrusion equipment for extrusion and thinning, extrude the rice strip-shaped capsule core material, and pour the rice strip-shaped capsule core material into the drum of the spheronizing equipment , roll out the capsule core particles, and dry t...

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Abstract

The invention discloses a microcapsule for self-repair concrete and a preparation method of the self-repair concrete. The microcapsule comprises a capsule core and a capsule wall, wherein the capsule core is composed of a repair agent, microcrystalline cellulose and Tween 80; and the capsule wall material is a crack-stress-sensitive high-polymer organic material. The preparation method of the self-repair concrete comprises the following steps: weighing proper amounts of cement, sand, water and the microcapsule, wherein every cubic meter of concrete contains 0.05-0.08 cubic meter of microcapsule; stirring the cement, sand and microcapsule until the components are dispersed uniformly; and pouring the water into the mixture of the cement, sand and microcapsule, and stirring uniformly. The microcapsule can be doped into the concrete to form the microcapsule concrete self-repair system, thereby implementing self-repair capability of the concrete crack; and the microcapsule concrete self-repair system has the characteristic of intelligent control.

Description

[technical field] [0001] The invention relates to concrete crack self-healing, in particular to a microcapsule for self-healing concrete and a preparation method of self-healing concrete. [Background technique] [0002] Concrete is the most widely used building and structural material today. Due to the composition of the structure itself and the characteristics of its bearing capacity, there are often some original micro-cracks inside the concrete. During its service, as the load changes and time goes by, the internal cracks will expand into cracks, and even extend to The surface leads to cracking of the concrete material. After the formation of through cracks, the concrete is easily eroded and damaged by the external environment and various harmful factors, such as steel bar corrosion, carbonization, chloride ion erosion and sulfate attack, etc., which eventually lead to cracking and destruction of the concrete material. , does not meet the requirements of use, seriously a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B28/00
CPCC04B20/1033C04B20/1048C04B2111/34B01J13/043C04B28/02C04B24/08C04B24/281C04B24/383C04B40/0641C04B7/323C04B14/06C04B22/148C04B24/2676C04B2111/2038
Inventor 董必钦邢锋房国豪丁蔚健林尚敏邱剑念
Owner SHENZHEN UNIV
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