Preparation method of machine-made sand concrete regulator

Abstract

The invention discloses a preparation method of a machine-made sand concrete regulator, and belongs to the field of concrete admixtures, the regulator obtained by the preparation method of the machine-made sand concrete regulator contains a large number of anionic groups, has small molecular weight and strong diffusivity, can be adsorbed prior to water and a high efficiency water reducing agent, and occupies adsorption vacancies, so that the surface energy of high-adsorbability stone powder and fine particles in concrete is effectively reduced, water adsorption and consumption of high-adsorbability machine-made sand are overcome to a great extent, formation of a local flocculation structure is effectively avoided, and compared with the prior art, the anti-collapse performance of the machine-made sand during concrete preparation is remarkably improved;through the setting of a gas oscillation mechanism, the reaction speed in the preparation process of the regulator is remarkably increased, the production time is shortened, and the preparation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a method for preparing a machine-made sand concrete conditioner. Background technique [0002] Manufactured sand (translated as Manufactured sand) is a kind of artificial sand, which is made by mechanical crushing and screening, with a particle size of less than 4.75mm, but excluding soft rock and weathered rock particles. Most of them are gray-white or black, and generally contain about 10-15% of stone powder (rock particles with a particle size of less than 75um). Generally within 3.0-3.7, the particle shape is mostly triangular or rectangular, the surface is rough and changeable, and sand is the main material of concrete. [0003] Due to mechanical crushing, machine-made sand often contains a large amount of stone powder and fine particles with small particle size and high proportion, resulting in the water consumption per unit volume of concrete prepared with it is much hi...

AI Technical Summary

Problems solved by technology

[0003] Due to mechanical crushing, machine-made sand often contains a large amount of stone powder and fine particles with small particle size and high proportion, which leads to a much higher water consumption per unit volume for concrete preparation For washing machine sand or river sand, and when preparing concrete slurry, stone powder and fine particles are often not fully saturated with water due to insufficient mixing, resulting in poor slump performance of concrete

[0004]Therefore, there is an urgent need to design a regulator that can solve or alleviate the problem of poor slump retention caused by high water consumption due to the relatively high content of stone powder

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