Waste recycling is a way to produce innovative low cost eco-friendly materials to solve environmental problems caused by different types of industrial by-product and polymeric wastes. Natural rubber loaded with different types of waste materials Calcium Hydroxide Ca(OH)2, Calcium Carbonate (CaCO3), Fly Ash (class F) and Waste rubber (WR) by mixing through open mill and then pressed in hot press to obtain low cost eco-friendly waterproofing membranes with desired properties. All samples pass the water penetration test up to 6 bars. The samples water absorption coefficients ranged from (0.1 to 0.3%) for all investigated samples. UV weathering and thermal aging tests were done to the samples while no changes on mechanical properties appeared before and after the tests. Dimensional stability test was done for all samples; a slight dimension change occurs. The mechanical and hardness measurements for all samples were done while good mechanical properties obtained. The price of square meter of 2 mm thickness for all samples was calculated in order to estimate its feasibility. A comparison of our samples with other waterproofing membranes from two famous Egyptian companies was done. Low cost and qualified waterproofing material can be obtained from recycling of some wastes.

One of the risks that threaten future generations is depletion of resources. Therefore, the exploitation of waste is one of the most successful ways to preserve resources and produce multi-use building materials. Calcium carbonate (CaCO3)/blend rubber (NR/SBR) and (CaCO3)/foamed rubber blend were prepared by mastication -vulcanization technique. Specific gravity for all samples were determined while ranged between (0.42-1.4) for (CaCO3)/foamed rubber blend and between (1.003 -2.9) for unfoamed rubber blend. Scanning electron microscope (SEM) for samples 150 phr of foamed and unfoamed rubber was done to compare the types of matrices. Thermal conductivity of the two groups were measured. The samples with concentrations till 150 phr CaCO3 foamed rubber lies in the range of thermal insulating materials while the samples of unfoamed rubber have higher thermal conductivity values. Water absorption test was conducted. The water absorption coefficient values of the foamed rubber are lower than that of unfoamed rubber. Mechanical measurements and swelling properties were investigated for all samples. The sample with 150 phr foamed rubber blend considered the optimum sample that achieve all desired thermal and moisture insulating properties.

New amendment in vulcanization process was used to prepare foamed rubber with enhanced physical properties other than expected and desirable thermal insulation properties. In this work the influence of foaming agent loaded NR/ SBR on thermal conductivity, density, water absorption swelling and mechanical properties was investigated. Different concentrations of foaming agent (2, 4, 6, 8, and 10 phr) were added to rubber matrix. The morphology of selected samples was characterized using scan electron microscope (SEM). An experimental investigation was carried out to obtain low cost multifunctional construction material with desirable mechanical and thermal insulation properties. The addition of foaming agent led to a decrease in thermal conductivity and density values until the concentration of 8phr after that their values slightly changed. It was also observed that mechanical properties of blends were improved with the addition of foaming agent. The optimum concentration was found to be 8phr for all measurements