Light-weight reinforced gypsum plaster board and preparation method thereof

Abstract

The invention relates to a light-weight reinforced gypsum plaster board and a preparation method thereof. The light-weight reinforced gypsum plaster board is prepared from the following raw materials in parts by weight: 100 parts of a gypsum clinker, 0.1-1 part of modified starch, 0.01-0.1 part of a foaming agent, 2-10 parts of rice straw fiber powder, 0.1-0.6 part of CMC (carboxyl methy cellulose) powder and 50-100 parts of water. By adding the rice straw fiber powder and the CMC powder, the workability of slurry is improved, the problems of low grade and low strength of desulfurization gypsum are solved, and particularly the rice straw fiber powder has an adsorption effect on Cl, so that the wetting bond quality of the gypsum plaster board is greatly improved; meanwhile, the consumption of the desulfurization gypsum and the foaming agent is reduced, and the strength and bond performance of the board are improved; the prepared gypsum plaster board is good in wetting bond performance, the mass per unit area of a 9.5mm waterproof board is 6.4kg / m<2> which is far superior to a national standard requirement that the mass per unit area is not less than 9.5kg / m<2>; and the average value of the transverse breaking load is 216.5N, the minimum value of the transverse breaking load is 202.6, the average value of the longitudinal breaking load is 448.0N, the minimum value of the longitudinal breaking load is 423.8N, and the strength is far higher than a national standard requirement.

Description

technical field [0001] The invention relates to a gypsum board for construction, in particular to a light-weight reinforced paper-faced gypsum board and a preparation method thereof. Background technique [0002] Desulfurization gypsum is a by-product of power plant desulfurization industry, and it is also the main raw material for the production of gypsum board. However, domestic desulfurized gypsum generally has a concentrated particle size distribution, low grade, and high harmful impurities, resulting in poor workability and water retention of the slurry made in the production process of gypsum boards, which increases the difficulty of controlling the production process of gypsum boards. It has seriously affected the strength and bonding quality of gypsum board products. At present, the domestic gypsum board production line measures to solve this problem are mostly to increase the mass per unit area of ​​the board, which not only leads to waste of resources, but also ma...

AI Technical Summary

Problems solved by technology

However, domestic desulfurized gypsum generally has a concentrated particle size distribution, low grade, and high harmful impurities, resulting in poor workability and water retention of the slurry made in the production process of gypsum boards, which increases the difficulty of controlling the production process of gypsum boards. Seriously affects the strength and bonding quality of gypsum board products

At present, most of the domestic gypsum board production lines solve this problem by increasing the mass per unit area of ​​the board, which not only leads to waste of resources, but also makes the gypsum board inconvenient for handling and construction, increasing production, transportation and construction costs

[0003] Rice straw is one of the main by-products of agricultural production. At present, rice straw is mainly used for livestock feed and firewood for stoves. There is a large backlog every year, occupying land, wasting resources and polluting the environment.

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