Prefabricated sandwich building wallboard and preparation technology thereof

Abstract

The invention discloses a prefabricated sandwich building wall panel. The prefabricated sandwich building wallboard comprises an outer wall panel and an inner wall panel, wherein the outer wall panelcomprises a facing layer, a thermal insulation layer and a structural layer, and the inner wall panel comprises a facing layer, a thermal insulation layer and a facing layer. According to the preparation technology of the prefabricated sandwich building wallboard, crushed straw is subjected to pre-treatment, the pre-treatment comprises alkaline water soaking, filtering and drying, according to effects of size of untreated and treated crop straw fibers on dissolved matters and water-absorbing swelling / drying shrinkage performance, effects of the straw particle size and corresponding technologyparameters on the performance of a straw / foam concrete compound material are studied, and the corresponding technology parameters and a mixing proportion are optimized; a heat conductivity coefficientand the ageing resistance performance of the prefabricated sandwich panel are ensured, based on the proper mixing proportion, a high polymer material is added, an optimal binding mode of inner panels, the thermal insulation layers and outer panels is fished out, moreover, the problem that the straw is prone to rotting and going bad is solved, the stability of the straw is maintained, and the mechanical strength and the durability of the novel wallboard are guaranteed.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a prefabricated and assembled "sandwich" building wallboard and a preparation process thereof. Background technique [0002] my country is a large agricultural country, and the output of straw has increased significantly with successive years of agricultural harvests. The annual output is about 650 million tons, accounting for 20% to 30% of the total straw in the world. In order to reduce the pollution of agricultural waste, in recent years, a series of policies and regulations have been formulated and promulgated to encourage and support the comprehensive utilization of agricultural waste. At present, about 30% of straw is used as fuel and energy for rural life, 16% is used as feed, 15% is returned to the field, 4% is used for power generation, 3% is used for edible fungus production, and 2% is used for other purposes, while discarded or directly in the field. Inci...

AI Technical Summary

Problems solved by technology

The invention not only has good heat preservation effect and light weight, but also solves the environmental pollution problem of straw waste, turns waste into treasure, has the remarkable characteristics of saving resources, saving energy, protecting cultivated land and protecting the environment; it produces considerable social and economic benefits