DefinePK

Abstract

The present research was designed to determine thermal properties of concrete manufactured by two different categories of coarse aggregates. For this rationale ninety six concrete cylinders of 100 × 200 mm were casted using burnt clay brick-chips and stone-chips as coarse aggregate with two different mixing ratios of 1:2:3 and 1:1.5:2. The specific heat and thermal diffusivity were measured by using semi-adiabatic calorimeter and CRD C 36-73 (heating and cooling of the samples) method respectively. The thermal conductivity was also obtained by multiplying the specific heat, density and thermal diffusivity. From the experiment it was observed that the specific heat of concrete having burnt clay brick-chips is 13% greater than the concrete having stone-chips. Again the specific heat is 2 and 7% greater at lower mixing ratio than rich mixing ratio for brick-chips and stone-chips respectively. In case of thermal diffusivity, concrete with stone-chips have 19% greater value than burnt clay brick-chips as coarse aggregate. Mixing ratio also have influence on thermal diffusivity and rich mixing ratio shows 42% and 22% greater values for brick-chips and stone-chips respectively than lower mixing ratio. Thermal conductivity has a linear relationship with thermal diffusivity in both types of aggregates.