This paper studies the influence of oil products)gas oil and gasoline misname benzene) on strength and durability of high strength latex modified concrete. Three percentage (5, 7.5 and 10% by weight of cement) of styrene butadiene rubber latex (SBR) were used in this work to produce Latex Modified High Strength Concrete (LM-HSC). Epoxy protective were used as coating for all test specimens. Three exposure periods of oil products were used 30, 90 and 180 days after 28 days water curing. The experimental program in this research including; compressive strength, weight change, sorpitivity and initial surface absorption tests were performed. Generally the results showed that LM-HSC coated by epoxy has good resistance to the effect of oil products relative to LM-HSC without epoxy coating. The results showed that modification of HSC with latex SBR increased the compressive strength and lowered weight change, initial surface absorption, and longer period taken for the capillary soaking resulted in lesser sorptivity value, and in comparison with the HSC control concrete. All samples sunken in gas oil showed better results than samples sunken in gasoline this may be ascribed to the lesser viscosity of gas oil than gasoline.

This research includes the study of the mechanical properties of normal concrete and concrete made of waste aggregates, such as stress-strain behavior and flexural strength. The waste aggregate contains fine waste glass powder and waste crushed boulders (cobblestone type) as coarse aggregate. The stress-strain behavior shows higher values of compressive strength and modulus of elasticity and larger area under stress-strain curve comparing with ordinary concrete which is containing ordinary aggregates. Also, the flexural strength is increased when using waste aggregates. The most benefit of this study is the cost decrease of concrete and clean environment by using waste materials in addition to higher values of compressive and flexural strengths. Total replacement of normal aggregate with waste aggregate gives the largest area under stress-strain curve. Compressive strength is increased from 36.4 MPa for control mix to 43.1 MPa for total replacement. The modulus of elasticity was about 30.6GPa for waste aggregate concrete of total replacement whereas in the normal aggregate concrete it was 26.4 GPa. In normal concrete, larger area under stress-strain diagram for waste aggregate concrete is achieved and that means higher toughness concrete. Also, high strength concrete is achieved by 75% and 100% replacement of normal aggregate with waste glass and cobblestone, respectively. The study includes the freezing-thawing cycles effect on concrete and the results show higher strength by using crushed glass and cobblestone aggregates. The aim of this study is to improve mechanical properties of concrete and durability of concrete to freezing and thawing by using waste glass aggregate and crushed cobblestone.