Machine-made sand modifier and application thereof in concrete containing machine-made sand

Abstract

The invention discloses a machine-made sand modifier and application thereof in concrete containing machine-made sand. The machine-made sand modifier disclosed by the invention is prepared from the following raw materials in parts by weight: 10-15% of diethanolisopropanolamine (DEIPA), 2-5% of maltodextrin, 5-10% of dipropylamine, 1-3% of air entraining agent for Clariant polyether type concrete,5-10% of sodium hexametaphosphate and the balance of water; the maltodextrin is formed by taking various starches as raw material, and performing low-degree controlled hydrolysis conversion, purifyingand drying through an enzymic method process, and a hydrolysis DE value is less than 20%, the dipropylamine molecular formula is C6Hl5N or (CH3CH2)2NH, and the molecular weight is 101.19; the dipropylamine is colorless liquid, has ammonia odor, can be mixed and dissolved in ethanol, ether, benzene and acetone, and is flammable liquid; and the main application is to organically synthesize an intermediate and take the dipropylamine as the solvent. The machine-made sand modifier is simple in process, convenient to operate, free from producing material in the production process, environment-friendly and reliable, and in favor of large-scale and industrial production; when the machine-made sand modifier is used, the concrete strength can be effectively improved, the adhesive material dosage isless, and the concrete encapsulating property can be regulated, and the concrete flowability is increased.

Description

technical field [0001] The invention relates to the technical field of preparation of machine-made sand conditioner, in particular to a machine-made sand conditioner and its application in concrete containing machine-made sand. Background technique [0002] Machine-made sand refers to sand processed by sand making machines and other auxiliary equipment. The finished product is more regular and can be processed into sand of different rules and sizes according to different process requirements, which can better meet daily needs. Machine-made sand requires professional equipment to produce qualified and suitable sand and gravel. The basic process is that the stone is initially crushed by the coarse crusher, and then the coarse material is conveyed by the belt conveyor to the fine crusher for further crushing. The stones of the feed size are fed into the machine-made sand, and the other part is fed back into the fine slope. A part of the stones fed into the sand making machine...

AI Technical Summary

Problems solved by technology

[0004] The traditional machine-made sand conditioner has a poor effect. The machine-made sand concrete prepared by the machine-made sand conditioner has the disadvantages of low strength, poor fluidity and encapsulation, so it cannot meet the needs of users.