Concrete is one of the composite material consisting of Coarse Aggregate, Fine aggregate, cement and water to cement ratio. All the components of the concrete are very important and affect the properties of the concrete at both fresh stage and hardened stage. Fresh properties of the cement and concrete such as setting time, heat of hydration, consistency and soundness. Various fresh properties of the concrete are Segregation, Bleeding, Hydration and Setting Time. There is great effect of type of water on the both properties of fresh and hardened concrete. There is greater requirement of large quantity of the water for the preparation of the concrete along with its curing. It is always not economical and technically feasible to provide fresh water at the construction site. Hence, waste water is used at the construction site for the preparation of the fresh concrete. Effect of the waste water on the physical properties of the cement and concrete are studied. It is found that there is improvement in the physical properties of the cement and concrete such as setting time, heat of hydration, consistency and soundness.

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Plastic is light weight and resistant material capable of being fabrication in various ways. Nowadays, large number of plastic bottles are wasted and disposed every day. To construct building the plastic bottles are useful. Waste plastic bottles provides thermal comfort while being sustainable. Waste plastic bottles are nonbiodegradable and its disposal has always been a problem therefore utilizing the waste plastic bottles for manufacturing of concrete block, we are using the plastic bottles in the form of crushed mixed in the concrete material in three different grades (M15, M20, M25). Normal concrete cubes are made up of all the conventional concrete materials such as cement, sand, water, coarse aggregate and fine aggregate. Plastic is economical and lightweight material and hence used as binding material in the concrete cubes. Concrete blocks are prepared with normal concrete materials and concrete materials with waste plastic bottles. Compressive strength of normal concrete block and concrete block with plastic bottle are tested at 7 days, 14 days and 28 days. It is found that compressive strength is more for concrete blocks with plastic bottles than concrete blocks with normal materials.