Lightweight grouting material for repairing hollowing of wall thermal insulation system and preparation method

A grouting material and system technology, applied in the field of building materials, can solve the problems of poor durability, poor water resistance, large volume and weight of chemical grouting materials, improve later strength and volume stability, excellent performance and simple production process. Effect

Inactive Publication Date: 2021-02-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical grouting materials have problems of poor durability and water resistance, and are easy to flow, resulting in serious waste of materials and failure to achieve the expected repair effect
Ordinary cement-based grouting materials have problems such as high density, large unit volume weight, many materials, high early expansion rate, but easy to shrink and crack in the later stage, and the strength is too high, poorly compatible with the insulation system, and poorly bonded to the insulation material. Inadequacies

Method used

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  • Lightweight grouting material for repairing hollowing of wall thermal insulation system and preparation method
  • Lightweight grouting material for repairing hollowing of wall thermal insulation system and preparation method

Examples

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Effect test

preparation example Construction

[0046]The preparation method of lightweight grouting material includes the following steps:

[0047]Step 1. Weigh various raw materials according to weight ratio;

[0048]Step 2: Add the weighed ternary cementitious material and auxiliary cementitious material into the coulter mixer and mix for 1min-2min;

[0049]Step 3. Add the weighed latex powder, cellulose ether, water reducing agent, air-entraining agent, defoamer, water repellent and expansion agent together into the coulter mixer and mix for 2min-3min;

[0050]Step 4. Finally, the weighed lightweight aggregate and quartz sand are added to the coulter mixer and mixed for 60s-90s to prepare a lightweight grouting material for hollow repair of the wall insulation system.

[0051]When in use, add water to the light grouting material, the amount of water added is 18%-21% of the total weight of the light grouting material, the specific steps are as follows: pour the weighed light grouting material into the forced mixer, and stir at the same time ...

Embodiment 1

[0054]A lightweight grouting material for hollow repair of wall insulation system, according to ternary cementing material 100, auxiliary cementing material 15, latex powder 8, cellulose ether 0.03, water reducing agent 0.3, air-entraining agent 0.15, defoaming It is prepared by weight ratio of agent 0.2, water repellent agent 0.6, expansion agent 0.04, light aggregate 3 and quartz sand 138.

[0055]First add the weighed ternary gelling material and auxiliary gelling material to the coulter mixer and mix for 1 min; then add the weighed latex powder, cellulose ether, water reducing agent, air-entraining agent, defoamer, The water-repellent agent and the expansion agent are added to the coulter mixer and mixed for 2 minutes; finally, the weighed lightweight aggregate and quartz sand are added to the coulter mixer and mixed for 60 seconds to prepare the wall insulation system. Use lightweight grouting materials.

[0056]Add water at 19% of the total weight of the lightweight grouting materia...

Embodiment 2

[0058]A lightweight grouting material for hollow repair of wall insulation system, according to ternary gelling material 100, auxiliary gelling material 20, latex powder 10, cellulose ether 0.04, water reducing agent 0.3, air-entraining agent 0.2, defoaming It is prepared by weight ratio of agent 0.3, water repellent agent 0.5, expansion agent 0.03, light aggregate 4, and quartz sand 180.

[0059]First add the weighed ternary gelling material and auxiliary gelling material to the coulter mixer and mix for 1 min; then add the weighed latex powder, cellulose ether, water reducing agent, air-entraining agent, defoamer, The water repellent and the expansion agent are added to the coulter mixer and mixed for 2 minutes; finally, the weighed lightweight aggregate and quartz sand are added to the coulter mixer and mixed for 75 seconds to prepare the wall insulation system Use lightweight grouting materials.

[0060]Add water at 18% of the total weight of the lightweight grouting material, and sti...

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Abstract

The invention belongs to the technical field of building materials, and provides a lightweight grouting material for repairing hollowing of a wall insulation system and a preparation method. The lightweight grouting material comprises a ternary cementing material, an auxiliary cementing material, latex powder, cellulose ether, a water reducing agent, an air entraining agent, an antifoaming agent,a water repellent, an expanding agent, lightweight aggregate and quartz sand, wherein the ternary cementing material is formed by mixing Portland cement, sulphoaluminate cement and gypsum, and the auxiliary cementing material is a mixture of titanium slag micro-powder and fly ash. The lightweight grouting material is simple to prepare and convenient to use, and has the advantages of easiness in grouting, good hollowing repairing effect, controllable setting time and operable time, small volume density, no segregation or layering, quicker early strength development, higher strength, high bonding strength with a matrix, no shrinkage cracking problem and the like; the grouting material is suitable for hollowing repair projects of various wall exterior and wall interior thermal insulation systems, and other grouting repair projects with low requirements on compressive strength and high requirements on adhesive properties.

Description

Technical field[0001]The invention belongs to the technical field of building materials, and specifically relates to a lightweight grouting material for hollow repair of a wall insulation system and a preparation method.Background technique[0002]Since 2000, the external wall thermal insulation system has been widely used in building exterior walls, which has achieved good thermal insulation and energy-saving effects. However, in recent years, due to environmental conditions, product quality, construction technology and other factors, the external wall insulation system hollows, cracks, and even falls off from time to time, which seriously affects the wall insulation and energy saving effect, and even threatens people’s lives. Safety. The maintenance and repair of the external wall insulation system has received increasing attention.[0003]In the process of service of the external wall insulation system, the first problem that is likely to occur is the hollow drum. If it cannot be rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16C04B111/40C04B111/70
CPCC04B28/16C04B2111/40C04B2111/70C04B2201/20C04B2201/50C04B22/144C04B7/02C04B7/32C04B18/144C04B18/08C04B24/2688C04B24/383C04B2103/302C04B2103/304C04B2103/50C04B2103/65C04B2103/0068C04B14/06C04B14/185
Inventor 张国防王顺祥罗顺王博王聪王培铭
Owner TONGJI UNIV
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