Wet-mix mortar admixture and its preparation method and application

Abstract

The invention relates to a wet-mixed mortar admixture as well as a preparation method and application thereof, and belongs to the technical field of building mortar. For solving technical problems, the invention provides the wet-mixed mortar admixture consisting of a material A and a material B, wherein the material A consists of the following components in percentage by weight: 0.8-2% of air entraining agent, 2-4% of retarder, 0.06-0.15% of anti-cracking agent, 0.6-1.2% of reinforcing agent, 0.3-0.7% of water retaining agent and the balance of water; the material B consists of the following components in percentage by weight: 3-12% of water reducing agent, 0.2-0.5% of shrinkage reducing agent and the balance of water. The wet-mixed mortar admixture disclosed by the invention is high in water reducing rate, environment-friendly, and can be used for improving the open time, workability and water retaining rate of mortar and improving the compressive strength and the bonding strength; by adopting a double-mixing manner of the materials A and B, the consumption of the material A or B can be effectively adjusted according to the performance of the mortar, and the performance of the mortar can be easily controlled.

Description

technical field [0001] The invention relates to a wet-mixed mortar admixture and a preparation method and application thereof, belonging to the technical field of building mortar. Background technique [0002] After the Ministry of Commerce, together with the departments of public security, transportation, construction, quality supervision, and environmental protection, issued the "Notice on Prohibiting On-site Mixing of Mortar in Some Cities within a Time Limit", mortar in construction projects has gradually been replaced by commercial mortar. There are two types of commercial mortars: dry mix and wet mix. Dry-mixed mortar is a dry powder building material that is composed of solid materials such as cementitious materials, mineral admixtures, fine aggregates, and admixtures, and is pre-mixed through a dry-mixing process according to a certain ratio. However, since the dry-mixed mortar is easy to segregate during transportation, and the raw sand needs to be dried and then s...

AI Technical Summary

Problems solved by technology

[0004] At present, there are some mortar admixtures that improve the performance of ordinary wet-mixed mortar in the domestic construction market, but there are some problems: some mortar admixtures are solid powders, and there is a lot of dust in the process of production, processing and transportation, which is not conducive to the environment. protection; some mortar admixtures can improve the working performance of mortar to a certain extent, but the strength is low;

In addition, the mortar admixtures on the market are all added in a single mixing method, which cannot easily control the performance of the mortar

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