Abstract
This paper presents the evaluation of the potential aggregate source for pavement construction in Pakistan. Recently the demand for construction materials has been increased significantly due to the establishment of the China-Pakistan Economic Corridor (CPEC) Projects. Therefore, it is essential to look for new resources of construction materials along with the CPEC routes in consideration of this increasing demand. In this context, a Physical and Mechanical characterization investigation is carried out on the Permian Wargal Limestone from Zaluch Nala, Salt Range to explore their potential to utilize as construction materials. The studied samples have tolerable values for all standard engineering parameters, proposed by various national and international agencies such as AASHTO, ASTM, BS, and NHA. Furthermore, as a performance indicator of aggregate overall quality, the evaluated mechanical qualities were integrated into a single characteristic, Toughness Index (TI). The TI values also suggested that the Permian Wargal limestone aggregates meet international quality standards for pavement construction. On the basis of geotechnical testing and Toughness Index (TI), the late Permian Wargal limestone, Zaluch Nala, Salt Range, is strongly recommended as a potential aggregate resource for mega projects such as the China-Pakistan Economic Corridor (CPEC) and other construction projects.
Highlights
Aggregate refers to any coarse to medium-grained material formed from natural or artificial materials, depending on the source and method of use
This paper presents the evaluation of the potential aggregate source for pavement construction in Pakistan
A Physical and Mechanical characterization investigation is carried out on the Permian Wargal Limestone from Zaluch Nala, Salt Range to explore their potential to utilize as construction materials
Summary
Aggregate refers to any coarse to medium-grained material formed from natural (igneous, sedimentary, or metamorphic rocks) or artificial (geosynthetic aggregates) materials, depending on the source and method of use. Aggregate is the most common material used in pavement construction [1]. Aggregate mixes must sustain plastic deformation and have a high resilience modulus to withstand traffic impacts (stiffness) [2]. Aggregates must be resistant to disintegration and weathering in situ, be free of plastic particles, and drain well [3]. Quarrying rocks and crushing them to the proper size is the primary method of producing aggregates in Pakistan [4] [5]. Several factors to consider when selecting and recognizing the qualities of aggregates are of great importance to pavement engineers when designing pavement construction [6]. An aggregate must meet a “specification” before being used as a road-making material. Specifications from the United Kingdom or the United States are often employed
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