Anti-seepage heat insulating rice husk concrete and preparation method thereof

Abstract

The invention discloses anti-seepage heat insulating rice husk concrete and a preparation method thereof, and the prepared anti-seepage heat insulating rice husk concrete comprises the following raw materials in percentage by mass: 0.6 to 4 percent of rice husk or rice husk powder, 2 to 6 percent of fly ash, 15 to 33 percent of cement, 14 to 27 percent of sand, 26 to 48 percent of stone, 0.15 to 1.2 percent of rice husk coupling agent, 0.11 to 0.29 percent of water reducing agent and the balance of water, and the total mass percentage of the raw materials is 100 percent. The anti-seepage heat insulating rice husk concrete is mainly applied to a concrete lining cannel in a northern irrigation district to prevent frost damage, and tests show the performance of the concrete meets the index requirements of 'Technical Code of Channel Anti-seepage Engineering' on the lining concrete, particularly the heat transfer coefficient of the concrete added with rice husk is only 14 to 20 percent of that of common concrete, and the anti-seepage grade can reach above W4 (the permeability coefficient is less than 0.783*10-8cm/s). Simultaneously, the anti-seepage heat insulating rice husk concrete is applied to non-load-bearing structures or hollow blocks and wall materials in building engineering, is an inexpensive heat insulating material. In addition, the invention opens up a new way for the use of rice husk, and can reduce the harm of combustion to the environment.

Description

technical field [0001] The invention relates to concrete and its preparation, in particular to an anti-seepage and heat-retaining rice husk concrete and its preparation method. Background technique [0002] In the cold regions of Northeast, Northwest, and North China, the rigid lining of canals is repeatedly frozen and thawed due to foundation soil expansion, uplift and settlement, resulting in cracking of lining boards, dislocation of joints, and collapse of landslides, seriously affecting seepage prevention and water conservation and stability of canal slopes. The service life of the anti-seepage lining board has become an urgent problem to be solved in the continuous water-saving reconstruction of cold irrigation areas. From the perspective of "insulation", the research on the prevention and control of frost heave is mainly concentrated on the canal buildings, while the research on the thermal insulation capacity of the lining itself is less. The effect of using cheap in...

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Problems solved by technology

[0004] In order to solve the problems of the rigid lining of the channel, such as repeated freezing and thawing of the foundation soil, expansion, uplift and settlement, cracking of the lining board, joint dislocation, and landslide collapse, the purpose of the present invention is to provide a kind of impermeable and heat-retaining rice husk concrete and its preparation method

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