A Study on the Behavior of Standard and Non-standard Sized Cores Made of Brick and Stone Chips

Abstract

The properties of a concrete are the most critical and important physical property while planning a reinforced concrete structure. Test specimen properties highly affect the compressive strength of concrete, such as moisture content, size etc. This paper represents the comparison result of compressive tests between standard and non-standard sized cores made of brick and stone chips taken from available literature. All the cores those were analyzed had similar compaction and similar curing conditions. Core cutting is a destructive method. Thus, it is very difficult to gather cores from existing buildings. In the literature, all the cores were drilled from demolished buildings. Two types of buildings were the sources of two types of cores, one made of stone chips, the other made of brick chips. The amount of compressive strength between differed cores were found to be very strongly dependent on aggregate type. Some of the cores had standard L/D ratio and some did not have the standard L/D ratio according to ASTM C42/C42M. The paper elaborates the difference of compressive strength between standard and non-standard core specimen. It also showcases how different L/D ratio and diameter of the core affect its compressive strength. There is a detailed comparison between standard and non-standard sized cores made of brick and stone chips. It is also shown that stone cores might take a larger amount of load than brick cores. The paper also describes how internal properties affect the compressive strength of the core. Also, how aging can reduce the amount of compressive strength of concrete. The cores that were taken from 15-25 years old building gives a very good idea about how aging concrete losses the capability of taking large amount of compressive strength.