Abstract:
The October 8, 2005 earthquake destroyed infrastructure of Allai-Banan area and large quantity of aggregate is required for the relocation, restoration, construction of buildings, bridges and roads. Moreover a number of hydroelectric projects with a total hydroelectric potential between 500 to 1000 MW are likely to be built on the Allai river and its tributaries that will require hundreds of thousands of cubic meter of fine and coarse aggregate. The Allai river and its tributaries flow across the Higher Himalaya, igneous and metamorphic rocks of the Lesser Himalaya, Tethyan Himalaya, Indus Suture Zone and part of adjoining Kohistan Island Arc and contains substantial quantity of aggregates that can be utilized for construction. The geology of the area reveals a very complex lithostratigraphic and lithotectonic set up that explain a very heterogeneous nature of aggregates derived from this terrain. Engineering properties of the gravel and associated sand deposits of Allai river, terraces, bars and its tributaries fulfill the parameters specified in the standards. However, the aggregates of Allai river system contain mylonites, slates, phyllites, microcrystalline quartz and highly strained quartz. These potentially reactive rock types can initiate alkali aggregate reaction that will damage the infrastructures if preventive measures are not considered.
Page(s):
43-54
DOI:
DOI not available
Published:
Journal: Geological Bulletin of the Punjab University, Volume: 44, Issue: , Year: 2009