Some properties of accelerated cured no fine Lightweight concrete


Thermal insulation is one of the main problems facing the engineers working inbuilding and housing sector spatially for the high summer temperature in the mostArab Gulf and spatially in Iraq, so the study of lightweight aggregate thermalinsulation (No fine concrete) is important. The experimental work consist of concretemixes (cement: porcelinite aggregate) ratios (1:4), (1:5) and (1:6) and for each mixescement content changes (200, 300 and 400) Kg/m3. Dependence on mixing (1:5) andcement content (300Kg/m3) change the water to cement ratio (0.4, 0.45 and 0.5) byweight. The research presents the tests of density, absorption, porosity, ultrasonicpulse velocity, accelerated compressive strength according to British standard (BS1881: Part 112: 1983), normal compressive strength at 7, 28 and 90-day. Light weightconcrete was obtained of density ranging from (721-770) kg/m3 and thermalconductivity ranging from (0.17- 0.24) W/ (m.K). The good correlation betweenaccelerated compressive strength at one day with normal compressive strength at 28-day is approximately (0.245 ±0.005) for water bath at 55°C and (0.335±0.05) forwater bath at 82°C.