Volume :

1

Issue :

2

Abstract :

This paper presents the qualification of coarse aggregates obtained from various existing quarries in and around Peshawar city for their use in structure concrete. Out of the ten (10) four (4) quarries were experimentally investigated. The sites were selected on the basis of being easily accessible and productive. Various tests including Bulk Density, Soundness of Aggregates, Los Angeles Abrasion, Alkali-Silica Reactivity (ASR), Alkali-Carbonate Rock Reaction (ACR) and Petrographic Examination of Aggregates were carried out according to ASTM standards. The results of this study show that the aggregates investigated have no unstable form of Silica and Reactive Carbonates. The Alkali-Silica and Alkali-Carbonate Reactions have shown no expansion, therefore, the representative samples are considered harmless to be used in concrete. Based on the experimental study of this research, coarse aggregates from the mentioned sources (Bara River, Basai, Loye-Khawar and Zangali/Jani-Khawar) can be safely used in structure concrete works. Out of the above four sources Basai is found to be the best source for coarse aggregates.