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Repair mortar and preparation method thereof and application in precast concrete unit repair

A technology for repairing mortar and mixture, which is applied in the field of repairing mortar and its preparation, and the repairing of precast concrete components. It can solve the problems of high compressive strength, low strength, and short setting time, and achieve flexural strength and bonding. High strength, high early strength, strong adhesive effect

Active Publication Date: 2018-11-13
BEIJING YANTONG BUILDING COMPONENTS PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement-based repair mortar has high compressive strength (28d strength is about 40MPa) and shrinkage is small, but its setting time is as long as more than 2h; cement plugging spirit has a short setting time (≤10min), but its strength is not high (28d strength is about 35MPa ), and the shrinkage is larger

Method used

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  • Repair mortar and preparation method thereof and application in precast concrete unit repair
  • Repair mortar and preparation method thereof and application in precast concrete unit repair

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preparation example Construction

[0038] The present invention provides the preparation method of repairing mortar described in above-mentioned scheme, comprises the following steps:

[0039] (1) Portland cement, sulphoaluminate cement and double fast cement are mixed to obtain a cement mixture;

[0040] (2) mixing the cement mixture with redispersible latex powder, expansion agent, early strength agent, rheological agent and defoamer to obtain a cement-auxiliary mixture;

[0041] (3) mixing the cement-auxiliary mixture with quartz sand to obtain a cement-based mortar mixture;

[0042] (4) Mix the cement-based mortar mixture with water to obtain repair mortar.

[0043]The invention mixes Portland cement, sulphoaluminate cement and double fast cement to obtain cement mixture. In the present invention, mixing is preferably carried out under stirring conditions. The present invention has no special requirements on the stirring speed, as long as the Portland cement, sulphoaluminate cement and double-fast cement ...

Embodiment 1

[0051] The repair mortar provided by embodiment 1 comprises the following components in weight percentage:

[0052] Portland cement 5%, sulphoaluminate cement 50%, Shuangkuai cement 10%, redispersible latex powder ( 5010N) 1%, expansion agent (anhydrite) 8%, quartz sand 20%, early strength agent (lithium carbonate) 0.3%, rheological agent (naphthalene rheological agent) 0.5%, defoamer (AGITAN P803 ) 0.4%, water 18%.

[0053] The preparation process of the repair mortar is as follows:

[0054] (1) Portland cement, sulphoaluminate cement and double fast cement are mixed to obtain a cement mixture;

[0055] (2) mixing the cement mixture with redispersible latex powder, expansion agent, early strength agent, rheological agent and defoamer to obtain a cement-auxiliary mixture;

[0056] (3) mixing the cement-auxiliary mixture with quartz sand to obtain a cement-based mortar mixture;

[0057] (4) Mix the cement-based mortar mixture with water to obtain repair mortar.

Embodiment 2

[0059] The repair mortar that embodiment 2 provides comprises the component of following percentage by weight:

[0060] Portland cement 10%, sulphoaluminate cement 40%, Shuangkuai cement 20%, redispersible latex powder ( 5010N) 1%, expansion agent (anhydrite) 8%, quartz sand 20%, early strength agent (lithium carbonate) 0.3%, rheological agent (naphthalene rheological agent) 0.5%, defoamer (AGITAN P803 ) 0.4%, water 18%.

[0061] The preparation process of the repair mortar is as follows:

[0062] (1) Portland cement, sulphoaluminate cement and double fast cement are mixed to obtain a cement mixture;

[0063] (2) mixing the cement mixture with redispersible latex powder, expansion agent, early strength agent, rheological agent and defoamer to obtain a cement-auxiliary mixture;

[0064] (3) mixing the cement-auxiliary mixture with quartz sand to obtain a cement-based mortar mixture;

[0065] (4) Mix the cement-based mortar mixture with water to obtain repair mortar.

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Abstract

The invention provides repair mortar. The repair mortar is prepared from the following components in percentage by mass: 5-15% of silicate cement, 30-50% of sulphate aluminium cement, 10-30% of doublequick cement, 1-2% of redispersible latex powder, 5-10% of expanding agent, 10-30% of silica sand, 0.1-0.5% of early strength agent, 0.5-1% of rheological agent, 0.2-0.5% of defoaming agent and 15-20% of water. According to the repair mortar, the multiple kinds of cement are adopted for compound use, by reasonably selecting the cement types, optimizing a ratio of the cement and adding the appropriate additives of the shrinkage-compensating material expanding agent, the early strength agent and the like, the finally obtained repair mortar has the advantages of fast setting, high early strength, high bonding force and no shrink; an example result shows that setting time of the repair mortar is about ten minutes, the strength in half an hour can reach 8 MPa or above, and the requirements offast repair and the durability of precast units are met.

Description

technical field [0001] The invention relates to the technical field of repairing mortar for concrete components, in particular to a repairing mortar, a preparation method thereof and an application in repairing prefabricated concrete components. Background technique [0002] Precast concrete components, also known as PC components, refer to concrete products processed and produced in factories through standardized and mechanized methods, and are widely used in construction, transportation, water conservancy and other fields. [0003] In the process of manufacturing, hoisting, transportation, storage, etc., precast concrete components will inevitably have some appearance defects, such as missing edges and corners, cracks, honeycomb pockmarks, etc. These defects are not only problems in appearance, but also seriously affect The overall effect of components, the appearance quality of precast concrete components is an intuitive reflection of the quality of precast concrete compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/10C04B2201/50C04B7/02C04B24/2623C04B22/143C04B14/06C04B22/10C04B2103/0068C04B2103/50C04B22/002
Inventor 刘兴华杨思忠徐光辉韩可林翟克鑫赵奇
Owner BEIJING YANTONG BUILDING COMPONENTS PROD
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