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Heat-insulation concrete
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A technology of thermal insulation concrete and its production method, which is applied in the field of concrete to achieve the effect of solving the energy-saving requirements of low-temperature buildings in winter
Inactive Publication Date: 2015-01-21
XIAMEN UNIV
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Problems solved by technology
However, the problem with this technology is that the thermal conductivity is 0.50-1.20W / (m*K), which is better than the 1.60-2.00W / (m*K) of the general concrete wall. 0.80~1.10W / (m*K) lower, but far from meeting the needs
Method used
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[0016] The production method is as follows: first, put the above-mentioned proportion of cement, sand, redispersible rubber powder, and water into the mixer, and after stirring for 5 minutes, then put the above-mentioned proportion of vitrified microbeads into the mixer evenly, and stir for 3 minutes.
Embodiment 2
[0018] A kind of thermal insulation concrete, its composition by mass ratio is:
[0020] The production method is as follows: first, put the above-mentioned proportion of cement, sand, redispersible rubber powder, and water into the mixer, and after stirring for 5 minutes, then put the above-mentioned proportion of vitrified microbeads into the mixer evenly, and stir for 3 minutes.
Embodiment 3
[0022] A kind of thermal insulation concrete, its composition by mass ratio is:
[0024] The production method is as follows: first, put the above-mentioned proportion of cement, sand, redispersible rubber powder, and water into the mixer, and after stirring for 5 minutes, then put the above-mentioned proportion of vitrified microbeads into the mixer evenly, and stir for 3 minutes.
[0025] After testing, the thermal conductivity W / (m.K) of the thermal insulation concrete prepared in Examples 1 to 3 are all in the range of 7d≤0.070; 28d≤0.085, indicating that they have good thermal insulation performance.
[0026] The specific performance indicators are as follows:
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Abstract
The invention relates to the field of concrete and provides a heat-insulation concrete with a good heat-insulation property. The heat insulation concrete is composed in a weight ratio of (35 to 50):(50 to 70):(46 to 56):(3 to 5):(17 to 23) of glass beads to cement to sands to re-dispersible glue powder to water. The heat-insulation concrete can be prepared by following steps: mixing cement, sands, re-dispersible glue powder and water in a mixer according to the ratio mentioned above, then adding glass beads in the mixture according to the ratio mentioned above, and evenly mixing the mixture to obtain the heat-insulation concrete. The heat-insulation concrete is tested, the thermal conductivity W / (m.K) of the heat-insulation concrete is in the range of 7d no larger than 0.070 and 28d no larger than 0.085, which shows that the heat-insulation concrete has a very good heat-insulation property.
Description
technical field [0001] The invention relates to concrete, in particular to a kind of thermal insulation concrete. Background technique [0002] At present, more than 90% of multi-story and high-rise buildings at home and abroad are reinforced concrete structures. For a small number of steel structure buildings, their enclosure structures include exterior walls and building (roof) covers and are also mainly made of concrete materials. In today's comprehensive "brick ban", the use of concrete structures is more extensive. However, the thermal insulation performance of concrete is poor, and the thermal conductivity is about 1.7W / (m*K). Therefore, in order to ensure the temperature inside the building, an insulation layer has to be added to the inner and / or outer layers of the concrete structure. Compared with the insulation materials used in the inner and outer insulation layers, the thermal conductivity of concrete is extremely high, so that the temperature inside the build...
Claims
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Application Information
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