M25 common dry-powder plastering mortar and preparation and use method thereof

Abstract

The invention belongs to the field of mortar, and particularly discloses M5 common dry-powder plastering mortar and a preparation and use method thereof. The mortar is prepared from, by weight, 80-100parts of cement, 35-55 parts of sulfur fixation ash, 55-75 parts of caustic dross, 770-830 parts of fine aggregate, 3-5 parts of redispersible latex powder, 0.1-0.25 part of a water retaining agent,0.05-0.2 part of a defoamer and 0.5-1.5 parts of a water reducer. The fine sulfur fixation ash and caustic dross are utilized as cement admixtures to replace traditional cement admixtures, the M25 common dry-powder masonry mortar having good comprehensive performance is prepared, the water retention capacity and mechanical property of the mortar are excellent, the setting time, volume-weight, initial consistence, 2h consistence loss ratio, 14 d bonding strength and 28 d shrinkage rate of the mortar also conform to the requirements of GB / T 25181-2010, the problem is solved that traditional cement admixture resources such as superfine slag powder and pulverized fuel ash are lacked, meanwhile the resourceful utilization ways of sulfur fixation ash and caustic dross of fire coal of circulatingfluidized bed boilers can be enriched, and the water retention capacity of the cement-based masonry mortar can also be improved.

Description

technical field [0001] The invention belongs to the field of mortar, and specifically discloses an M5 common dry powder plastering mortar and a preparation and use method thereof. Background technique [0002] Plastering mortar refers to a kind of ready-mixed mortar that will be applied on the surface of buildings (structures), and is an important part of building structures. Cement-based plastering mortar has always been the mainstream of plastering mortar. Its cementitious components are generally composed of cement and mineral admixtures. Fly ash and slag powder are commonly used mineral admixtures. However, cement-based plastering mortar generally has the problem of poor water retention, and it is generally necessary to add additional water retention agents (such as cellulose ether, etc.) to meet the application requirements. At the same time, in recent years, the supply of mineral admixtures such as fly ash and slag micropowder has become tighter and the price has cont...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortage of traditional cement admixtures such as slag powder and fly ash, to enrich the resource utilization of circulating fluidized bed boiler coal-fired sulfur-fixed ash and alkali slag, and to improve the performance of cement-based plastering mortar itself Water retention performance, the invention provides a kind of M5 ordinary dry powder plastering mortar and its preparation and use method

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