Flue gas desulfurization gypsum-based thermal insulation mortar and lightweight cold-bending thin-wall type steel composite wall

Abstract

The invention provides flue gas desulfurization gypsum-based thermal insulation mortar and a lightweight cold-bending thin-wall type steel composite wall. The flue gas desulfurization gypsum-based lightweight cold-bending thin-wall type steel composite wall comprises channel steel arranged at the bottom, multiple uniformly distributed cold-bending thin-wall type steel columns are vertically solidified on the channel steel, wall panels are installed on the two sides of the columns, the flue gas desulfurization gypsum-based thermal insulation mortar is poured into a cavity between the wall panels, and the flue gas desulfurization gypsum-based lightweight cold-bending thin-wall type steel composite wall is formed after solidification is achieved. The flue gas desulfurization gypsum-based thermal insulation mortar is prepared from flue gas desulfurization gypsum, cement, fly ash, lightweight aggregates, a water reducing agent, a retarder, a thickening agent and water, wherein the lightweight aggregates are polyphenyl particles or expanded and vitrified small balls. By means of addition of the lightweight aggregates, the weight of the material itself can be decreased to a certain extent, and the strength can be improved; due to the fact that the lightweight aggregates exit, it can be guaranteed that the size of the thermal insulation mortar is stable, the phenomenon that the material is separated from the wall panels due to the fact that the material is dried and then shrinks is avoided, it is guaranteed that the wall is tightly attached to the wall panels, and the comprehensive load capacity of the wall is improved.

Description

technical field [0001] The invention belongs to the field of building walls, and relates to a cold-formed thin-walled steel wall, in particular to a desulfurized gypsum-based thermal insulation slurry and a lightweight cold-formed thin-walled steel composite wall. Background technique [0002] The cold-formed thin-walled steel building residential system is a new type of cold-formed thin-walled steel structure residential system. The materials used are all green building materials. Among them, the steel structure materials can be 100% recycled, and most of the other supporting materials can also be recycled to meet the ecological environment. Require. In today's world where environmental problems are particularly prominent, the popularization and application of cold-formed thin-walled steel residential systems has high economic and social benefits. In the application process of cold-formed thin-walled steel structures, some residents raised the problem of "hollowing" of the...

AI Technical Summary

Problems solved by technology

After a comprehensive analysis of this type of wall, it is found that there are still the following deficiencies: thermal insulation cotton does not contribute to the bearing capacity of the composite wall system, cannot share the force of the wall, cannot form lateral constraints on the keel, and is prone to local buckling damage of the keel

[0003] Flue gas desulfurization of coal-fired power plants produces a large amount of solid waste desulfurization gypsum. In 2000, the total output of desulfurization gypsum in my country reached 2 million tons. In 2010, the annual output of desulfurization gypsum exceeded 13 million tons. At present, calcined desulfurization gypsum is used for gypsum It is the main application direction of desulfurized gypsum in the production of finished products, or directly as a coagulation agent in the production of cement. my country has not yet found other effective ways to increase its utilization.

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