A non-steaming and non-burning continuous extrusion lightweight composite gypsum inner partition board and its preparation method

Abstract

The invention relates to the technical field of building materials, in particular to a non-autoclaved and unfired light composite gypsum internal partition wall obtained through continuous extrusion molding and a preparation method of the partition wall. Gypsum, fly ash, Portland cement, plant fiber, polyvinyl alcohol, sodium polyacrylate, calcium hydroxide, dispersible rubber powder, a cationic modifier, a water reducing agent, a foaming agent, a water repellent and deionized water are selected as preparation material components of the internal partition wall, the materials are pretreated andsubjected to mixing, stirring, mold pressing and extrusion molding, and the internal partition wall has the characteristics of being non-autoclaved, unfired, energy-saving, environmentally friendly,quick to mold, short in production period and the like, and the process is simple. The internal partition wall has the properties that single-point hanging force is 20% higher than the national standard while meeting GB / T 23451-2009 light weight panels for partition wall used in buildings, compressive strength is 5.8 MPa at unit weight of 534 kg / m<3>, a stronger mechanical structure is taken intoaccount under the condition of lower weight, materials are saved, and economic benefits are greatly improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a non-steaming and non-burning continuous extrusion lightweight composite gypsum inner partition wall and a preparation method thereof. Background technique [0002] Among the common wall materials in our country, traditional wall materials still dominate, and there are problems such as backward industrial structure, high production energy consumption, and environmental pollution. In recent years, although some gypsum blocks and gypsum slats have appeared, the building performance is not ideal, and according to the characteristics of building materials, while providing materials with special properties such as building insulation and waterproofing, it cannot reduce the lightness and strength of materials. The performance and indicators in terms of convenience and construction convenience pose a great challenge to the development of wall prefabricated materials. [000...

AI Technical Summary

Problems solved by technology

However, the gypsum light-weight internal partition boards in the prior art also have many defects, including: untreated gypsum slats are not water-resistant, and when soaked in water, they tend to soften and disperse; the strength is not high, and the general strength is only 2-3.5Mpa, there are very few high-strength gypsum inner partition boards exceeding 3.5Mpa; most of the gypsum inner partition boards on the market are hollow and bare boards, which are easily damaged during handling and hoisting; the biggest problem is: all slats (Whether it is cement board, gypsum board or other boards), under the action of temperature and pressure, it is easy to crack, which affects its large-scale application

However, due to the reduction of the mass in the unit space, there will be a certain decrease in performance in terms of impact resistance and compressive strength, and vertical cracks are likely to form on the decorative surface in the later stage, and the hanging performance is not satisfactory.

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