Glass fibre reinforced composite pipes were fabricated by using an IPN blend of 0%, 10%, 20%, 30%, 40%, 50% PU prepolymer (Polyurethane) with VER(Vinylester) resin. The prepared IPN (Interpenetrating polymer networks) composite pipes were subjected to boiling water immersion tests in order to study the effect of moisture absorption characteristics. The Burst strength and Hoop strength of water immersed specimens were evaluated (3, 6, 9, 12 months) and compared along with dry composite specimens. It was found that, percentage of moisture uptake was significantly reduced with increase in PU loading into the IPN system as well the Burst strength and Hoop strength of the specimens were found to be diminishing with raise in percentage of moisture uptake and raise in temperature; contrarily, the addition of PU significantly reduced the moisture intake, in addition to that the PU added IPN pipe offers better mechanical strength while compared with neat Vinylester pipes.

This project work intends to investigate the possibility of producing low costs enhanced performance concrete by wood ash. By taking the enormous amount of sand in river beds, it affects the environment badly and demand for fine aggregate is increase day by day. So by partially replacing Prosopis juliflora ash with fine aggregate in construction field, it can serve both the purpose of meeting the demands of construction industry and at the same time providing a green and clean environment. This expectation of partial replacement of fine aggregate by using wood ash in concrete gives the general characteristics like density, strength, workability and durability. The conventional concrete mixture consists of cement, course aggregate, fine aggregate and water in the project wood ash is used with different percentage 0f 10%,20%,30%. The total number of 9 cubes of 150-150mm is casted using the grade of concrete M20. The mixture is prepared for concrete cubes and conduct the compressive strength on 7 days, 14 days and 28 days.

The use of waste glass is increasing day by day, although step were taken to reduce its consumption. Waste glass is environmental effect. The current option for disposal of waste glass is land fill. The landfills is creates the environment pollution. The aim of the investigation is study the coarse aggregate has been replacement by waste glass according in the range of 0%, 10% and 20% by weight of M25 concrete. And Sisal fibre is then most widely used natural fibre and is easily cultivated in India. The processing techniques are physical and mechanical properties. Sisal fibre is an agricultural product. It is used as reinforcement in concrete. Sisal fibre is used to increase the strength of the building .Conventional concrete is strong in compression and weak in tension. Mechanical properties such as compressive strength and tensile strength are determined. The percentage of sisal fibres added by cement based such as 0%, 10% and 20% will be added in M25 grade of cement concrete are tested at the age 7, 14, 28 days of curing. It's used for reduce the cost of construction and increase the strength of the concrete. It also be used to attain a high strength and stiffness with low component weight. The concrete cube were tested for compressive strength, split tensile strength and flexure strength of concrete. This help to reduce the cost of the project.