High-impermeability cement-based repairing mortar with crack self-sealing function and preparation method

A repairing mortar and self-sealing technology, applied in the field of building materials, can solve the problems of easy cracking and inability to self-sealing cracks, etc., and achieve the effect of improving the impermeability.

Inactive Publication Date: 2021-05-28
THE THIRD CONSTR CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the object of the present invention is to provide a high-impermeability cement-based repair mortar with self-sealing crack function and its preparation method, aiming to solve the technical problem that the existing repair mortar repair interface is easy to crack and cannot self-sealing crack after cracking

Method used

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  • High-impermeability cement-based repairing mortar with crack self-sealing function and preparation method
  • High-impermeability cement-based repairing mortar with crack self-sealing function and preparation method
  • High-impermeability cement-based repairing mortar with crack self-sealing function and preparation method

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Experimental program
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Effect test

Embodiment 1

[0054](1) Preparation of raw materials: 100 parts of sulfur-aluminate cement, 300 pieces of quartz sand, 5 parts of SAP, 4.5 water-based epoxy emulsions, 3.2 parts of curing agent, 0.8 parts of water reducer, 30 water, 30 parts of water Silicone foaming agent 0.1 parts.

[0055](2) SAP pretreatment: SAP first with 5% concentration Ca before stirring SAP (NO3)2The solution was soaked in the pretreatment of 24 h, then removed the wet after the wetting, preventing the surface excess water from gumped into the cement mortar, causing the aforemention of the mortar to change.

[0056](3) Preparation of high anti-seepage mortar: mixed with sulumate cement, quartz sand, mixed with a hydraulic epoxy resin emulsion, mixed with a curing agent, and add a defoamer, water reduction The agent was mixed with water to mix the mixture, and the mixture was mixed with the dry mixture for 1 min after 1min for 1 min, and then the pre-treatment SAP was thoroughly mixed for 2 min. After the mortar test piece, th...

Embodiment 2

[0058](1) Preparation of raw materials: 100 parts of sully aluminate cement, 300 pieces of quartz sand, 6 pieces of quartz sand, 6 parts of SAP8, waterborne epoxy, 4.3 parts of the curing agent, 30 parts of water reducer, 30 water, 30 parts of water Silicone foamed by 0.2 parts.

[0059](2) SAP pretreatment: SAP first in agitation first 8% concentration Ca (NO3)2The solution was soaked in the pretreatment of 24 h, then removed the wet after the wetting, preventing the surface excess water from gumped into the cement mortar, causing the aforemention of the mortar to change.

[0060](3) Preparation of high anti-seepage mortar: mixed with sulumate cement, quartz sand, mixed with a hydraulic epoxy resin emulsion, mixed with a curing agent, and add a defoamer, water reduction The agent was mixed with water to mix the mixture, and the mixture was mixed with the dry mixture for 1 min after 1min for 1 min, and then the pre-treatment SAP was thoroughly mixed for 2 min. After the mortar test piece,...

Embodiment 3

[0062](1) Preparation of raw materials: 100 parts of sulfur-aluminate cement, 300 pieces of quartz sand, 9 pieces of SAP13, and 6.4 parts of the curing agent, 30 parts of water reducer, 30 parts of water, 30 parts of water 0.3 parts of the silicon diffuser.

[0063](2) SAP pretreatment: SAP first use 10% concentration Ca before stirring SAP (NO3)2The solution was soaked in the pretreatment of 24 h, then removed the wet after the wetting, preventing the surface excess water from gumped into the cement mortar, causing the aforemention of the mortar to change.

[0064](3) Preparation of high anti-seepage mortar: mixed with sulumate cement, quartz sand, mixed with a hydraulic epoxy resin emulsion, mixed with a curing agent, and add a defoamer, water reduction The agent was mixed with water to mix the mixture, and the mixture was mixed with the dry mixture for 1 min after 1min for 1 min, and then the pre-treatment SAP was thoroughly mixed for 2 min. After the mortar test piece, the film was ma...

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Abstract

The invention relates to high-impermeability cement-based repair mortar with a crack self-sealing function and a preparation method, and is suitable for the technical field of building materials. The repair mortar is prepared from the following components in parts by mass: 100 parts of sulphoaluminate cement, 150 to 300 parts of quartz sand, 5 to 16 parts of super absorbent resin SAP, 2 to 9 parts of waterborne epoxy resin emulsion, 1.4 to 6.4 parts of curing agent, 0.5 to 1 part of water reducing agent, 0.1 to 0.3 part of defoaming agent and 20 to 35 parts of water. The super absorbent resin needs to be pretreated by adopting a high-concentration calcium salt solution before being used. The cement-based repairing mortar provided by the invention not only has a good bonding effect with matrix concrete, but also has a crack self-sealing function when underground water permeates, so that a good anti-permeability effect is achieved, and the repairing efficiency of underground engineering concrete under high-water-content geology can be effectively improved.

Description

Technical field[0001]The present invention belongs to the technical field of building materials, and more particularly to a high imperative cement-based repair mortar and preparation method having self-enclosed crack function.Background technique[0002]With the advancement of urbanization and the increasingly shortline of urban construction, large number of construction projects are expanding toward underground space, underground tunnel engineering, top management engineering and other construction continue to advance. In some water-wide engineering environments, these underground projects are often facing the penetration of high pressure water, which has higher requirements for the anti-seepage properties of cement concrete. In the process of cement concrete service in underground, often due to poor formation, medium corrosion, vehicle vibration, and pipe quality, construction technology deviation, etc., calendering, breakage, etc., etc., which causes pipeline or tunnel cement concr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B24/28C04B24/26
CPCC04B28/06C04B24/281C04B24/2641C04B24/2652C04B2201/50C04B14/06C04B2103/302C04B2103/50
Inventor 袁俊李文王勇胡凯徐振孙凯张泽勇方宇轩
Owner THE THIRD CONSTR CO LTD OF CHINA CONSTR THIRD ENG BUREAU
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