A kind of machine-made sand dust collection ash dry-mixed mortar and its preparation method

Abstract

The invention discloses dry-mixed mortar with collected dust ash from machine-made sand and a preparation method thereof. The dry-mixed mortar with the collected dust ash from the machine-made sand is prepared from cement, sand, the collected dust ash and an additive, wherein the collected dust ash has particles with particle sizes which are not more than 0.075mm, water content of 0.3 to 0.5 percent, a volume weight of 1700g / L to 1800g / L, and appearances which are approximately round. The preparation method comprises the following steps of dust collection, impurity removal, oven-drying, cooling and mixing. By using the dry-mixed mortar with the collected dust ash from the machine-made sand and the preparation method thereof, the waste collected dust ash is changed into a useful material; the resource utilization of an industrial waste substance is realized; the performance of the motor is improved through the addition of the collected dust ash; the strength of the motor is promoted; the water retentivity is increased; the denseness is enhanced; the compactness of the motor is increased; the durability is enhanced; according to the dry-mixed mortar with the collected dust ash from the machine-made sand and the preparation method thereof, the use level of the additive is decreased through the addition of the collected dust ash, and as the cost of the additive is high, the production cost of the dry-mixed mortar is decreased. The preparation method of the dry-mixed mortar with the collected dust ash from the machine-made sand, which is provided by the invention, has the advantages of being simple to operate, convenient for preparation, low in cost and applicable to industrialized large-scale production.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to a dry-mixed mortar of machine-made sand, dust collection and ash and a preparation method thereof. Background technique [0002] In order to speed up the energy saving and emission reduction of my country's construction industry and promote the construction of a harmonious society, on June 6, 2007, six ministries and commissions including the Ministry of Commerce, the Ministry of Public Security, the Ministry of Construction, the General Administration of Quality Supervision, Inspection and Quarantine and the State Environmental Protection The Notice on the Prohibition of On-Site Mixing Mortar Work within a Limited Time Period (Shang Gai Fa [2007] 205), it will take 3 years to promote ordinary commodity mortar step by step in 127 cities across the country, and realize the replacement of traditional on-site mixing mortar by ready-mixed mortar. Solve t...

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Problems solved by technology

[0004] Ordinary dry-mixed mortar is used as a substitute for on-site mixing mortar, and its composition has been optimized in various aspects. Ordinary dry-mixed mortar is composed of cementitious materials, fine aggregates, admixtures and admixtures. Cement is the main hydraulic gel The material is used in dry-mixed mortar. Due to the increase in the number of large-scale buildings in China, new requirements have been put forward for waterproof performance. At the same time, in order to improve the quality of building mortar, the application of lime, which is a hard cementitious material, has been greatly restricted.

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