Method for preparing two-component pre-mixed mortar by mixing twice

Abstract

The invention provides a method for preparing two-component pre-mixed mortar by mixing twice, which comprises the following steps of: 1. weighing a cementing material, an additive, fly ash, silica ash and a mineral admixture in a certain proportion and mixing to obtain a cementing component; 2. Weighing weighing aggregates distributed by different grain sizes in a certain proportion and mixing to obtain an aggregate component; 3. Respectively respectively transporting the cementing component and the aggregate component in bulk or in bags to a construction site; performing secondary mixing in a sealed condition to mixing the cementing component and the aggregate component together to obtain the two-component pre-mixed mortar prepared by mixing twice, wherein the cementing material accounts for 15%-35%, the aggregate component accounts for 65%-85%, and water addition is determined by the type of the mortar. By the invention, quantity fluctuation of the mortar caused by the segregation and layering of the mortar in the processes of production, transportation, storage and use can be avoided, mismatching between consumption and transport loadage and between construction period and mortar coagulation time in the use process of the mortar can be solved thoroughly, and bulk utilization rate can be improved greatly.

Description

technical field [0001] The invention relates to a preparation method of ready-mixed mortar. Background technique [0002] As a new green building material, ready-mixed mortar has been listed as one of the 15 key development and encouragement projects by the Ministry of Construction. The Ministry of Commerce, the Ministry of Public Security, the Ministry of Construction, the Ministry of Communications, the General Administration of Quality Supervision, Inspection and Quarantine, and the General Administration of Environmental Protection issued the "Notice on Further Promoting the Use of Ready-Mixed Concrete and Prohibiting On-site Mixing of Mortar in Urban Areas" in 2004; The corresponding documents have been obtained (the bulk utilization rate is required to be greater than 70%). The application advantages of ready-mixed mortar are reflected in the following aspects. First, the centralized production of factories ensures the quality of mortar products, which is suitable for...

AI Technical Summary

Problems solved by technology

The above mortar, especially bulk dry-mixed mortar, in the process of production, transportation, storage and application, due to the large difference in specific gravity and particle size between cementitious materials such as cement and various admixture components and aggregates, will cause serious damage. Segregation and stratification lead to serious changes in the proportion of each component during use, which affects the quality of the mortar and leads to the inability to guarantee the quality of the project. Especially in the application process of ready-mixed mortar, there are differences in the amount and transportation load, construction time and mortar The problem of mismatching setting time is also the root cause of the difficulty in promoting ready-mixed mortar and its bulk dry-mixed mortar in my country in recent years.

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