In this research, an empirical work study to investigate the thermal insulation properties of a mixture of some selected wastes of different composition, represented by (polyethylene, Styropor, active carbon, and rubber) for a purpose to use in a building isolation. These wastes are mixed with cement using a different volumetric percentage ratio as (10 to 30) percentage, with 5% increase for each test trial. A Lee's Disc, apparatus is used to measure the thermal conductivity for each constructed mold. Through which the thermal conductivity of the proportions added with cement is determined. Knowing this fact, the effect of these additives on the effectiveness and quality as an insulating mixture is analyzed and compared with each other to get finally the best possible mixture ratio.

From the preliminary examinations, it is found that all the mixing materials prepared with their volume ratios mention above, have a good thermal insulation property as its thermal conductivity rate does not exceed the range of (0.300835). This value is located below the average in the heat-conducting materials scale, especially for thermal insulators used for concrete prepared for work construction.

Tests are conducted on the prepared samples to get in mind the effect of these insulating materials with their indicated percentages on the cement insulating behavior, leading finally to the choose of the best ones. The obtained results and readings of these samples are compared with the results taken from the cement without any additives. All experimental results proved that the behavior of the thermal conductivity coefficient with their additive indicated are versible relation with the percentage step up of the volume ratio. In addition, (active carbon mixture) is chosen as the best mixing insulating material, specifically at the mixing ratio of (30%) ranged.