1. Natural Rubber and the Synthetics;Allen,1972
2. Natural clay-shredded tire mixtures as landfill barrier materials;Al-Tabbaa;Waste Management,1998
3. ASTM-C311, Standard Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland Cement Concrete. Annual Book of ASTM Standards.
4. ASTM C-496, 1990. Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens. Annual Book of ASTM Standards, vol. 04.02.
5. ASTM C 618-93, Standard Specification for Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete. Annual Book of ASTM Standards, vol. 04.02, pp. 310–312.