Abstract
Evaluation of Physico-Mechanical Properties of Crushed Rock Aggregates: A Case Study from the Sub-Himalaya, Pakistan
Highlights
Crushed rock aggregates (CRA) have been used in desired sizes for raw material in the construction industry and play a vital role in road and building construction, as in asphalt and cement concrete
Muzaffarabad Formation cannot be used in cement concrete as it possesses high silica content and dolomite as per petrographic and XRD analysis, which shows its affinity towards Alkali Silica Reaction (ASR) and Alkali Carbonate Reaction (ACR)
The obtained results of the Muzaffarabad Formation show High LAV (25-32%), high AIV (20-25%), high Aggregate Crushing Value (ACV) (20-22%) and high water absorption values (0.74-0.98%), represent the quarries which are placed near to the Muzaffarabad Fault (MF) zone and show high percentages of micro-fractures observed in petrography
Summary
Crushed rock aggregates (CRA) have been used in desired sizes for raw material in the construction industry and play a vital role in road and building construction, as in asphalt and cement concrete. As well as Alkali Silica Reaction (ASR) and Alkali Carbonate Reaction (ACR), compromise the concrete strength if aggregate properties are not up to the required standards, badly affecting the construction quality (Lopez-Buendia et al, 2006). Knowledge of some aggregate properties (e.g., density, moisture conditions and grading) is essential for amalgamate concrete mixtures. The density, porosity, shape, grading as well as aggregate surface texture determine the characteristics of plastic concrete mixtures. The petrographic fabrics of aggregates alter their hardness, crushing strength, soundness and elastic modulus, which may greatly affect different characteristics of hardened concretes (Fournari and Ioannou, 2019)
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