Wet-mixed plastering mortar

Abstract

The invention discloses wet-mixed plastering mortar which is prepared from the following raw materials in percentage by weight: 10-16% of cement, 0-6% of fly ash, 65-75% of machine-made sand, 8-10% of water and 0.3-0.56% of a mortar additive, the additive adopted by the invention can effectively prolong the plastic retaining time of the wet-mixed mortar, also has certain air entraining and retarding properties, and the water reducing rate can meet the use requirements of the mortar, so that the bleeding phenomenon in the early stage of the mortar is avoided, and the construction performance of the mortar is further improved; the wet-mixed plastering mortar provided by the invention has excellent working performance in consistency loss and water retention rate, can be continuously used for 24-48 hours on site, is excellent in water retention rate, can effectively reduce the cracking and hollowing probability after the plastering mortar is formed, does not need to be mixed by adding water for the second time, can be completely mixed according to a design ratio, ensures the construction quality, and has the advantages of low cost and high efficiency. The field labor quantity is reduced.

Description

technical field [0001] The invention relates to the technical field of building material mortar, in particular to a wet-mix plastering mortar. Background technique [0002] In the context of my country's environmental struggle, research on urban atmospheric pollution monitoring has shown that in recent years, urban air pollution has shifted from coal soot pollution to dust pollution in the past. Cement, sand and other related dust generated during construction. If the construction site adopts ready-mixed mortar and ready-mixed concrete, it can prevent the dust "running, running, dripping, leaking" and other pollution caused by the transportation of powder and granular materials such as cement, yellow sand, and stones to the construction site; it can reduce on-site mixing. Secondary dust pollution caused by stacking powder and granular building materials in the open air; it can avoid the noise of on-site mixers from disturbing the people; it can prevent a large amount of ceme...

AI Technical Summary

Problems solved by technology

The dry-mixed mortar must be used within 1-2 hours after the on-site mixing is completed, otherwise the mortar will solidify and the quality cannot be guaranteed. In actual on-site operations, it is often found that the plastering workers add water twice or multiple times before mixing, resulting in poor mortar quality. Can't guarantee

For general wet-mixed mortar, due to the large amount of one-time mixing, it must be stored in the mortar tank on site, and the mortar is used for a long time, often resulting in mortar sedimentation, water loss, and greater consistency loss. After a period of use performance will be lost

Therefore, the plastering mortar and masonry mortar required by many high-rise, small high-rise or underground projects cannot meet the long-term use requirements of the mortar due to the performance of the mortar, resulting in loss of work performance, and secondary water mixing occurs, which delays the construction period and wastes materials. There are quality hidden dangers, so special craft products are required to meet the long-term non-solidification of on-site mortar and maintain working performance

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