Thermal and constructional behavior of light concrete block using many crushed materials as aggregate with economic analysis

	Thermal and constructional behavior of light concrete block using many crushed materials as aggregate with economic analysis
Journal Of Wassit For Science & Medicine
Article 1, Volume 8, Issue 2, 2015, Pages 62-79
Abstract
Abstract The riverine aggregate have high mass density (2700Kg/m3) and thermal conductivity (2.8W/m.c0) this reflects the properties of the block concrete in order to decrease these properties , the riverine aggregate must be replaced by any materials have low density and thermal conductivity such as : scrap brick , lime stone , or black stone (pumice). In this paper, block concrete samples (solid and hollow), with dimensions of (200x200x200mm) , were constructed mixing ratio of (4:2:1)by mass and water percentage of 0.5 were used . The thermal and constructional behavior of these blacks was investigated at Baghdad climate zone during one year at 21th day of each month for 15 hr/day. The test results showed that, using pumice racks as aggregate reduced the density by about 44% and increased the energy saving by about 34%. However, this enhancing in the properties was accompanied with reduction in the tensile and compression stresses of unloaded walls. Using limestone as aggregate gave 20% reduction in density with 5% increase in the energy saving 60% reduction in density and 40% increase in the energy saving were achieved when using gypsum block with fiber glass layers.

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