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

A concrete and rice husk technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as lining board cracking, joint dislocation, landslide collapse, etc., to eliminate pollution, light weight, porosity, etc. great effect

Inactive Publication Date: 2010-10-13
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 28.4% of cement; 19.3% of sand; 5% of fly ash; 30.9% of sand and pebbles (the particle size of sand and pebbles is 5-20mm); 12.8% of water; 2.6% of original rice husk; 0.8% of 108 glue; Water agent 0.2%; Among them, the water reducer is selected from the commercially available JSG powdered high-efficiency water reducer.

[0029] The preparation method comprises the following steps:

[0030] 1) Weigh rice husk or rice husk powder, fly ash, cement, sand, sand pebbles, 108 glue, and water reducing agent according to the mixing ratio, and control the water consumption based on the slump of 30~50mm;

[0031] 2) Dilute 108 glue with water, add water twice as much as 108 glue, pour it into the mixing basin and stir it manually for 10 minutes, and leave it for 20 minutes for use;

[0032] 3) Put rice husk or rice husk powder, fly ash, sand, stones, and cement into the mixer, add water, water reducing agent and the diluted 108 glue in step 2), pay attention to the amount of wat...

Embodiment 2

[0036] Take 28.1% cement; 16.8% sand; 34.9% sand and pebbles (the particle size of sand and pebbles is 5-20mm); 2.4% fly ash; 13.8% water; 2.9% original rice husk; Water agent 0.2%, of which the water reducer is commercially available GJ-1 powdered high-efficiency water reducer.

[0037] Mix according to the production method of Example 1 (the slump is controlled at 10-30mm), put it on a vibrating table and vibrate for 30s before forming, plaster the surface before the initial setting of the concrete, remove the mold after 24 hours, and send it to the curing room for standard curing .

[0038] Product indicators reached: compressive strength 16Mpa, apparent density 1723kg / m 3 , permeability coefficient 0.466×10 -8 cm / s, compressive strength 14.5Mpa after freeze-thaw test, thermal conductivity 0.2452W (mK) -1 .

Embodiment 3

[0040] Take 24% cement by weight ratio; 23.2% sand; 37.4% sand pebbles (the particle size of sand pebbles is 5-31.5mm); 9.9% water; screened); fly ash 4.1%; 108 glue 0.3%; water reducing agent 0.2%, among which the water reducing agent is selected from the commercially available JSG powdered high-efficiency water reducing agent.

[0041] Mix according to the production method of Example 1 (the slump is controlled at 30-50mm), put it on a vibrating table and vibrate for 30s before forming, plaster the surface before the initial setting of the concrete, remove the mold after 24 hours, and send it to the curing room for standard curing .

[0042] Product index reached: apparent density 2250kg / m 3, compressive strength 23.6Mpa, permeability coefficient 3.681×10 -9 cm / s, after 50 freeze-thaw cycle experiments, the mass loss is 0.5%, and the relative dynamic elastic modulus of concrete is 94.5%.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B2111/28C04B28/02Y02W30/91C04B14/02C04B14/06C04B18/08C04B18/24C04B20/0076C04B40/0028C04B2103/302
Inventor 娄宗科张文郁谢琼闫宁霞
Owner NORTHWEST A & F UNIV
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