A LABORATORY STUDY ON THE USE OF OVERBURNT BRICK AGGREGATES IN THE CONSTRUCTION OF PAVEMENTS
Author(s):
Bharat Sarkar, Prasenjit Das
Keywords:
Overburn brick aggregate, California bearing ratio, Moisture content, Dry density
Abstract
The current study attempted to investigate overburnt brick aggregate as a material for a sub-base course in the flexible pavement and an aggregate for a cement-treated base. The laboratory work included analysing the properties of overburnt brick aggregate, such as the Los Angeles abrasion, water absorption, specific gravity, unit weight, the impact test, crushing value, and soil mixed soil with different proportions of overburnt brick aggregate. California bearing ratio (CBR) tests were performed on aggregates mixed with soil in various proportions [1]. The aggregates samples were prepared and tested without soil first, then with soil in varying weight percentages ranging from 15% to 50%. CBR tests show that increasing the percentage of coarse aggregates up to 75% increases the sample's CBR value for light dynamic compaction. The CBR value of the sample increases with the percentage of coarse aggregates up to 100% for light and heavy static compaction. Such weak aggregates will likely be crushed under traffic if used in bituminous mixes. As a result, it was decided to investigate the viability of using overburnt brick in lean cement concrete mixes. Several mixes with varying cement content were chosen. Compressive and modulus of rupture tests were also performed. This study discovered that the maximum CBR values in soaked conditions are 78% and 140% for light and heavy compaction, respectively, indicating that it is feasible to use.
Article Details
Unique Paper ID: 156781

Publication Volume & Issue: Volume 9, Issue 4

Page(s): 652 - 658
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