Tertiary feeding method for mixing water permeable cement concrete on site

Abstract

The invention discloses a tertiary feeding method for mixing water permeable cement concrete on site. The method comprises the following steps: (1) firstly premixing 100% of aggregate and 70% of mixing water; (2) then adding 50% of cement and all admixtures for mixing; and (3) finally adding the remaining 50% of cement and 30% of mixing water to an agitator. In the method, materials such as the aggregate, the cement, the water, the admixtures and the like are mixed by the tertiary feeding method, which solves the problems of the water permeable cement concrete such as low strength and poor water permeability caused by a primary feeding method, and effectively improves the strength and water permeability of the water permeable cement concrete, thus being favorable for popularization and application.

Description

Three feeding method for on-site mixing of permeable cement concrete technical field The invention relates to an on-site preparation method of concrete, in particular to an on-site preparation method of permeable cement concrete, belonging to the technical field of building materials. Background technique The permeable cement concrete adopts the conventional feeding method (one-time feeding) during the on-site preparation process, that is, aggregate, cement, water, admixtures, etc. are added to the mixer and stirred together. mixing method), but the prepared concrete tends to have low strength and poor water permeability. The main reasons are as follows: 1. The permeable cement concrete is mixed with one-time feeding, and the contact surface between the aggregate and the cement paste is not uniform, resulting in incomplete wrapping of the aggregate by the cement paste, and the bonding effect of the cement paste cannot be well exerted , which directly affects the strength...

AI Technical Summary

Problems solved by technology

In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a three-time feeding method for on-site mixing of permeable cement concrete, so as to solve the problem of low strength and water permeability of permeable cement concrete due to the one-time feeding method. sex problem

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