Light aggregate foam concrete building blocks and method for manufacturing same

Abstract

The invention discloses a lightweight aggregate cellular concrete block and a preparation method thereof. The lightweight aggregate cellular concrete block comprises cement, lightweight aggregate, water, a foaming agent and an additive. The lightweight aggregate is multihole lightweight aggregate with the stacking density of less than 1200kg / m3. The foaming agent is the substance, with which foam is formed in a material, thus forming a material in a closed pore or a connected pore structure. The additive is one, several or none of concrete common additives and mineral additives. In the preparation method, the cement, the additive, the chemical foaming agent (or not involved) and water are weighted and fed into an agitator, and beaten into a mixed cement paste; the mixed cement paste is manufactured into a foamed cement paste through a foaming device; after the lightweight aggregate is added to the foamed cement paste, the mixture is beaten and poured. Subsequently, the mixture is moulded at one step and cured. The manufacturing cost of the lightweight aggregate cellular concrete block is low; the manufacturing process is simple and easy to control; regions, which are able to invest on the production of the lightweight aggregate cellular concrete block, are wider.

Description

technical field [0001] The invention relates to a building material and a manufacturing method thereof, in particular to a lightweight aggregate foam concrete block and a manufacturing method thereof. Background technique [0002] In order to meet the needs of building high-rise and heat preservation and energy saving, concrete blocks are increasingly developed to be ultra-light. Among them, the lightweight aggregate concrete blocks used to improve concrete aggregates include ceramsite, slag, a small amount of other light waste residues or natural lightweight aggregate blocks. Among them, there are aerated concrete blocks and foam concrete blocks to improve the lightweight concrete blocks of cement paste. Among them, the lightweight concrete block that not only improves the aggregate but also improves the cement slurry is like the patent document "a high-strength lightweight concrete block and its manufacturing method" published by the State Intellectual Property Office on ...

AI Technical Summary

Problems solved by technology

But its disadvantages are: its mineral admixture is fly ash, which is easily limited by local resources; its manufacturing method is to send cement, fly ash, water reducing agent, shrinkage reducing agent and water into the mixer after metering, and induce The air agent is mechanically foamed and then added to the mixer, and then light and coarse aggregate is added and sent to the pouring car after stirring. This process uses a large amount of foaming agent and the size of the foam is different, which is not conducive to improving the strength of the block; , in the environment of 20-40 ℃ for 8-16 hours, after mechanical sawing, in the curing kiln in the environment of 60-90 ℃ for 8-16 hours or in the autoclave with 0.4-2Mpa The pressure is steamed and autoclaved for 6-12 hours. This process requires the construction of a resting room and a steaming room for product maintenance under different conditions. The product will go through several processes of resting, demoulding, cutting, steaming, and re-cutting, and A large amount of solid waste and waste water are generated in the cutting process, resulting in a substantial increase in investment and production costs

Due to the large mold casting and mechanical cutting manufacturing method, a large number of light aggregate cutting surfaces are distributed on the surface of the product, which is not suitable for bonding with ordinary mortar.