The most common constituent of sand, in inland continental settings and non-tropical coastal settings, is silica (silicon dioxide, or SiO 2), usually in the form of quartz, which, because of its chemical inertness and considerable hardness, is the most common mineral resistant to weathering.
Concrete, usually Portland cement concrete, is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens over time—most frequently a lime-based cement binder, such as Portland cement, but sometimes with other hydraulic cements, such as a calcium aluminate cement.
EVALUATION OF SOLID WASTE MANAGEMENT IN SATELLITE TOWNS OF MOHALI AND PANCHKULA–INDIA Rishi Rana, Rajiv Ganguly, Ashok Kumar Gupta *. Department of Civil Engineering, Jaypee University of Information Technology, Waknaghat, District Solan, Himachal Pradesh 173234, INDIA
India: Increasing demand challenges the dairy sector. Meeta Punjabi Dairy consultant New Delhi. Over the span of three decades, India has transformed from a country of acute milk shortage to the world's leading milk producer, with production exceeding 100 million tonnes in 2006.