FA@CNTs reinforced foam cement insulation board

Abstract

The invention discloses a FA@CNTs reinforced foam cement insulation board. The FA@CNTs reinforced foam cement insulation board is prepared from the following raw materials in parts by mass: 50 to 100parts of ordinary Portland cement, 5 to 30 parts of flyash, 0.75 to 3.5 parts of FA@CNTs with FA@CNTs content of 20 percent, 1 to 5 parts of silica fume, 0.2 to 0.8 part of foam stabilizer, 0.5 to 3 parts of early strength agent, 0.025 to 0.2 part of fibers, 0.025 to 0.1 part of water reducing agent, 2.5 to 7 parts of polymer emulsion, 2.5 to 9 parts of foaming agent and 17.5 to 50 parts of water.Under the condition that dry density is lower than 200kg / m<3>, the problem that the compressive strength of a foam cement insulation board is lower than 0.3 MPa can be solved by doping processed FA@CNTs and carbon nanotubes; the foam cement insulation board prepared under the same conditions is found by comparison that after the FA@CNTs are doped, the FA@CNTs are uniformly dispersed in the foam cement under the same gas forming porosity conditions of foam cement to enhance pore walls, so that compressive strength of the foam cement can be effectively improved and overall performance is better. The foam cement insulation board also has the characteristics of simple construction, A-grade fire protection and low cost.

Description

Technical field: [0001] The invention relates to a carbon nanotube grown on the surface of fly ash (fly ash and carbon nanotube are abbreviated as FA@CNTs, and carbon nanotubes grown on the surface of fly ash are abbreviated as FA-CNTs) to enhance foam cement insulation A plate method belongs to the field of building materials. Background technique: [0002] With the development of my country's industrialization and urbanization, the per capita building area will continue to grow, and people's requirements for residential comfort are getting higher and higher, such as air conditioning, heating, etc., so the proportion of building energy consumption to the total energy consumption of the society is still increasing. increase. With the adjustment of the national building energy-saving policy, in order to meet the building energy-saving standards, the existing buildings are put on thermal insulation coat. Due to the unevenness of building energy-saving materials and at the sam...

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Problems solved by technology

[0003] In order to solve the dry apparent density below 200kg / m 3 The foamed cement insulation board has low compressive strength and poor thermal insulation performance under certain conditions. The invention provides a reinforced foamed cement insulation board. It is proposed to add FA@CNTs (the content of FA-CNTs is 20%) to strengthen The strength of foam cement, when the density is lower than 200kg / m 3 A technical solution to effectively improve its strength and thermal insulation performance under certain conditions

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