Non-autoclaved aerated concrete building block and manufacturing method

Abstract

The invention discloses a non-autoclaved aerated concrete building block which contains portland cement, fly ash, mill calcium oxide powder, desulphurization plaster and foaming agent; the formulationis also added with trolamine, sodium sulfate, and naphthalene sulfonate formaldehyde condensate. The invention also discloses a manufacturing method for the non-autoclaved aerated concrete building block. The invention has the beneficial effects that the early-strength and water reduction combination of the trolamine, the sodium sulfate, and the naphthalene sulfonate formaldehyde condensate greatly increases the early strength development rate of the aerated concrete and brings benefits to the long-term strength development of the aerated concrete; the non-autoclaved aerated process fully utilizes the hydration heat evolution of the cement and dispelling heat evolution of the calcium oxide and carries out the normal pressure dampness-heat maintenance, obviously reduces the cost of the maintenance of equipment and the manufacture dissipation energy, and increases the manufacturing safety.

Description

technical field [0001] The invention relates to a building material, more specifically to a non-autoclaved aerated concrete block and a manufacturing method. technical background [0002] Air-entrained concrete is made of siliceous materials (sand, fly ash and silicon-containing tailings, etc.) The reaction forms pores, and is a porous silicate artificial material made by casting, pre-curing, cutting, autoclaving and other processes. It has the advantages of light weight, heat preservation, heat insulation, sound insulation, earthquake resistance, fire prevention, and simple construction, and is widely used as a wall material for buildings. The vast majority of air-entrained concrete products in my country are blocks, which are mostly used for filling and enclosure structures of frame structures, while a large number of steel structure buildings and rural buildings have not yet generally used air-entrained concrete. The main reason for this phenomenon is product quality. An...

AI Technical Summary

Problems solved by technology

Although the production method of the above-mentioned non-autoclaved aerated concrete solves the problems of high maintenance cost, high energy consumption and poor safety of production operation in the traditional production process of autoclaved aerated concrete, due to the lack of early strength in the formula Chemical admixtures such as additives and plasticizers, the product has problems such as low strength and long production cycle