EXPERIMENTAL INVESTIGATION ON CONCRETE WITH PARTIAL REPALCEMENT OF PEBBLES SAND AS A FINE AGGREGATE

Concrete is the main building material used in construction today. It consists of cement, fine aggregate, coarse aggregate and water. Fine aggregates are needed in large quantities to produce concrete. Generally, river sand is used as fine aggregate. Due to the increase in the use of concrete in the construction industry, the demand for river sand has increased significantly. This scenario demonstrates how environmental concerns and the high price of natural river sand interact. As a civil engineers, we have intended to employ an alternate material to replace the river sand, which is frequently used in construction sector. One of the finest solutions for this issue is pebble sand which is grained version of pebbles stone. The pebbles sand has been tested in accordance with the code for fineness modulus, specific gravity and water absorption test. This study examines the mechanical properties of concrete grade M30 using pebbles sand as a fine aggregate. The six categories of concrete were each replaced with 20% incremental increase of pebble sand by weight to obtain the concrete's fresh and hardening behavior. According to the results of this investigation, river sand might replace with 60% of the Pebbles sand in concrete which is performed well in all aspects, compared to conventional concrete. In this study, it was concluded that the Concrete's behaviour was noticeably reduced when Pebbles sand was replaced more than 60% into river sand.