Concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and use method of material

A technology of calcium silicate hydrate and repairing materials, which is applied in the field of concrete crack grouting repairing materials, can solve the problems of unfavorable microstructure development of grouting materials, affecting the durability of grouting repairing materials, etc., and achieve excellent water retention and fluidity, good Effect of self-curing and improving durability

Inactive Publication Date: 2016-07-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials are all repair materials designed from the perspective of rapid ettringite generation. However, the crystal structure of ettringite is often distributed in acicular shape, and its excessive formation will be locally enriched inside the material, and stress concentration will occur unde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, a kind of concrete crack grouting repair material prepared by using calcium silicate hydrate seed powder. Ordinary Portland cement 100, calcium silicate hydrate seed powder 3, hydroxymethyl cellulose ether 0.02, can be re- Disperse rubber powder 1.0, gypsum 1.2, naphthalene sulfonic acid formaldehyde condensation product water reducer 0.6, limestone powder 8, alum stone 2 mass ratio and mix evenly after weighing. After adding 35% water to the dry powder material and stirring, the fluidity of the product can reach 315mm, the tensile strength can reach 3.3MPa 28 days after hardening, and the compression-shear bonding strength can reach 5.9MPa. After 9 freeze-thaw cycles, the compression-shear bonding strength decreases The rate is 0%.

Embodiment 2

[0037] Example 2, a concrete crack grouting repair material prepared by using calcium silicate hydrate seed powder. The weight ratio of ordinary Portland cement is 100, calcium silicate hydrate seed powder is 6, and hydroxymethyl cellulose ether is 0.05. The mass ratio of redispersible rubber powder 2.5, gypsum 1.8, naphthalenesulfonic acid formaldehyde condensation product water reducer 0.9, limestone powder 12, alum stone 5 is weighed and mixed evenly. After adding 42% water of the dry powder material and stirring, the fluidity of the product can reach 330mm, the tensile strength can reach 4.4MPa 28 days after hardening, and the compression-shear bonding strength can reach 7.1MPa. After 12 freeze-thaw cycles, the compression-shear bonding strength decreases The rate is 0%.

Embodiment 3

[0038] Example 3, a concrete crack grouting repair material prepared by using calcium silicate hydrate seed powder. The weight ratio of ordinary Portland cement is 100, calcium silicate hydrate seed powder is 12, and hydroxymethyl cellulose ether is 0.10. The mass ratio of redispersible rubber powder 5.5, gypsum 2.6, naphthalenesulfonic acid formaldehyde condensation product water reducer 1.2, limestone powder 25, alum stone 12 is weighed and mixed evenly. When 50% of the dry powder material is added to the water for stirring, the fluidity of the product can reach 305mm, the tensile strength can reach 3.7MPa 28 days after hardening, and the compression-shear bonding strength can reach 6.3MPa. After 12 freeze-thaw cycles, the compression-shear bonding strength decreases The rate is 0%.

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Abstract

The invention relates to the field of building construction materials, in particular to a concrete crack grouting repairing material prepared from calcium silicate hydrate crystal seed powder and a use method of the material.The concrete crack grouting repairing material is prepared from ordinary Portland cement, the calcium silicate hydrate crystal seed powder, hydroxymethyl cellulose ether, dispersible adhesive powder, gypsum, a naphthalene sulfonated formaldehyde condensate water reducing agent, limestone powder and alunite.The concrete crack grouting repairing material can be used for rapidly repairing concrete cracks of a building structure, and therefore the mechanical property and durability of the concrete structure are improved, and the service life of the building is prolonged.The concrete crack grouting repairing material is suitable for repairing of cracks of concrete structures such as reinforced concrete structures, concrete pavements, bridges and water conservancy projects.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a concrete crack grouting repair material prepared by using hydrated calcium silicate seed crystal powder and a use method thereof. Background technique [0002] With the increasing application range of concrete material structures, people put forward higher requirements for concrete materials. However, concrete also has its own inherent defects and deficiencies, such as leakage and permeable deterioration, which are mainly due to the fact that concrete is not a material with high homogeneity, and there are many harmful pores and cracks inside. Cracks, in particular, can be called common and frequently-occurring diseases of concrete materials, and their quantity, shape, distribution and other characteristics have a significant impact on the mechanical strength and durability of concrete. At present, many old buildings and engineering structures with poor construction quality in...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/70C04B7/02C04B24/386C04B24/24C04B24/226C04B14/28C04B22/142C04B22/085C04B22/08
Inventor 孙振平冀言亮杨海静蒋晓星唐晓博张世杰
Owner TONGJI UNIV
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