Replaceing Of Coarse Aggregate And Cement By Coconut Shells And Flyash In Concrete

In this work we will discuss about the replacement of coarse aggregate and cement with coconut shells and fly ash in this project, we know that the strength of both coarse aggregate and cement mixture now we will check the concrete, then we will add the coconut shells and the 15% fly ash and prepare the concrete. We will use this mixture to make cubes, columns and beams, and we will check the strength of the concrete for 7 days, 14 days and 28 days, and then we will use it to prepare concrete blocks and others. With these elements we obtain similar results and the cost will also be reduced. Concrete is the number one widely used base material on the planet today. The enthusiasm for creating a lightweight material has been the subject of a study tested by both researchers and specialists. Testing in creating lightweight concrete reduces density while maintaining quality and without negatively impacting cost. Combining new aggregates with a general mixing scheme is a typical way to reduce the thickness of concrete

Performance Based Study And Behavior Of Pervious Concrete

It is used in flat concrete works that allow water to pass through, thus reducing surface runoff from the site and allowing groundwater recharge. High porosity is achieved by highly cross-linked void content. Prior concrete typically has a water to cement ratio of about 0.28 to 0.4. The mix consists of reinforcing material, coarse aggregate, and water with some fine aggregate. Adding a small amount of fine aggregate will reduce void content and increase overall strength. Precast concrete is generally used in parking areas, light traffic areas, and residential areas. It is an important application for groundwater recharge. The current project deals with the study and comparison of mechanical properties, permeability properties and durability of various previous concrete grades (M15, M20, M25). We study the behavior and behavior of the open structure of pre-concrete in climatic conditions of India. We study the resistance properties of conventional concrete with previous concrete. We study the effect of fine aggregate and the water / mix ratio on the properties of the previous concrete

Effect of various rebar types and crushed glass coating onto BFRP rebar on the bond strength to concrete

This study demonstrates the bond-slip behaviour of steel, BFRP, CFRP and GFRP rebars to concrete obtained from a series of pull-out tests. Results show that CFRP can achieve higher bond strength than steel, whereas BFRP attains half of the bond strength of steel. The bond strength was decreased by 23–28% in steel and BFRP due to an increase in bar diameter. However, the CFRP and GFRP showed a 73–78% reduction in bond strength due to the increase in bar diameter. Steel had the steepest slope in the bond-slip curve, followed by CFRP, BFRP and GFRP. Since BFRP attained optimum performance, the surface coating was applied onto BFRP using natural sand and recycled crushed glass to evaluate the roughness of FRP on the bond performance. Sand and glass coated BFRP demonstrated 37% and 75% higher bond strength compared to uncoated BFRP, while bond stiffness was increased by 14 and 11%, respectively. Compared to the sand coated BFRP, crushed glass coated BFRP exhibited approximately 20% and 10% more bond strength for the 6 mm and 10 mm diameter rebars, respectively. However, the glass coated BFRP exhibited more brittle behaviour compared to its sand coated counterparts. Based on the analytical results, surface roughness and embedment length are found to have a significant influence on the ultimate bond strength (p-value < 0.05) at a 5% level of significance. Additionally, the interaction effect of diameter*embedment and diameter*coating was found to have a significant effect on bond strength