Improvement the mechanical and thermal properties of concrete hollow blocks by using local materials in Iraq

الملخص EN

This research studies the effects of adding industrial wastes admixtures with different percentages on the thermal and mechanical properties of concrete hollow blocks (CHB).

Different types of admixtures were used in this work, including, rubber cuttings, wood saw dust and barley reeds ash with(5 %, 10%, 15 %, 20 % ) percent of each one.

Thermal conductivity, specific heat capacity, compressive strength, flexural tensile strength and variation of density have been examined for each specimen at all percents of admixtures, and comparing with the reference concrete specimens.

From the obtained test result, the study concluded that the use of these admixtures in (CHB) significantly effects of thermal conductivity, specific heat capacity, compressive strength, flexural tensile strength, especially at (5 %) of adding materials, as well as utilization of additives in (CHB) to produce low density mixtures with barley reeds or as high density concrete using when rubber cuttings in the (CHB) mixture.