A comparative Study On The Compressive Strength Of Concrete By Using Broken pile Head concrete And Natural Coarse Aggregates

Abstract

This thesis presents a comparative study on the compressive strength of concrete using two different types of coarse aggregates—broken pile head concrete and natural stone aggregate—along with different types of fine aggregates. The main goal of this research is to find out whether broken pile head concrete, which is usually treated as construction waste, can be reused as a replacement for natural aggregates in concrete, without significantly affecting the strength and performance of the final product. To achieve this, concrete samples were prepared using both natural coarse aggregates and broken pile head concrete. Each type of coarse aggregate was combined with three different fine aggregates: river sand, manufactured sand (M-sand), and crushed stone dust. These combinations helped us understand how both coarse and fine aggregates affect the compressive strength of concrete. The compressive strength of all concrete samples was tested after 7 and 28 days of curing. The results showed that concrete using broken pile head aggregates can perform quite similarly to conventional concrete made with natural stone, especially when used with M sand. Although there was a slight reduction in strength in some cases, the values were still within acceptable limits for most structural applications. This means that recycled concrete materials, like pile head waste, can be a good alternative to natural aggregates in many situations. Using recycled materials in concrete production not only reduces the demand for natural resources but also helps in managing construction and demolition waste in an eco friendly way. This study supports sustainable construction practices and shows that with proper selection of materials, we can produce concrete that is both strong and environmentally responsible. In this study, it is observed that The Indian pakur stone and Sylhet sand gave better compressive strength value (14.70 Mpa) and brocken Pile head concrete and sylhet sand Strength value (12.16 Mpa) method for 7 days test. The Indian Pakur Stone and sylhet Sand gave high compressive strength Value (19.58 Mpa) and (recycled concrete) and Sylhet sand strength for 28 days curing test. The study demonstrates that the method and duration of curing greatly affects the strength characteristics of concrete. Hence, quality control for proper field curing is the utmost importance.