Shrinkage-compensating foam concrete for lightweight composite partition board

Abstract

The invention discloses shrinkage-compensating foam concrete for a lightweight composite partition board. The shrinkage-compensating foam concrete is prepared from the following raw materials in parts by weight: 150 to 250 parts of cement, 50 to 100 parts of fluidization bed fly ash, 2 to 4 parts of composite activator, 10 to 15 parts of foaming agent, 1.5 to 3.5 parts of polyester fibers, 1.5 to 2.5 parts of water reducing agent and 1 to 3 parts of thickening agent. The foam concrete has the characteristic of shrinkage compensation; the prepared lightweight composite partition board is high in hardness; a foam concrete layer is not easy to collapse; a composite panel is not easy to fall off; energy conservation and environment friendliness are realized.

Description

technical field [0001] The invention belongs to the field of wall materials, and in particular relates to a novel wall material of a lightweight composite partition wall board. Background technique [0002] Making the foam concrete and the panel into a sandwich composite panel can make the wallboard have good light weight and thermal insulation performance, and at the same time improve the overall mechanical properties of the composite wall material to meet the needs of users. Sandwich composite panels are composite materials, and the materials of each phase must have similar volume change characteristics, such as drying shrinkage properties. For cement-based materials, the drying shrinkage mechanism is related to the internal pores of the cement paste. The dry shrinkage of foamed concrete is relatively large, which mainly comes from the capillary pores and gel pores filled with water in the C-S-H gel in the cement paste. The dry shrinkage value of calcium silicate board a...

AI Technical Summary

Problems solved by technology

The mechanical properties of the foam concrete itself are not high. If the internal tensile stress is greater than the ultimate tensile stress of the foam concrete itself, it will cause cracks inside the foam concrete, or even form through cracks, causing the panel to fall off and affecting product quality.

[0004] In order to improve the expansion performance of foamed concrete, the common practice is to add an expansion agent, but it will reduce the strength and increase the cost, and the expansion agent needs to be calcined at high temperature, which consumes a lot of energy; in addition, the raw material components and ratio of the expansion agent are fixed, and cannot be determined according to The project needs reasonable and flexible deployment

[0005] At present, the annual emission of circulating fluidized bed fly ash in my country is about 80 million to 150 million tons. However, due to the different combustion conditions of boilers and ordinary pulverized coal furnaces, compared with ordinary fly ash, it has higher SO3 and free CaO content, and the expansion From the perspective of environmental protection, the solid waste utilization of recycled vulcanized fly ash is imminent

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