Concrete is the most commonly used construction material, often being a mixture of Portland cement with sand, crushed rock and water. The ratio of concrete consumption to steel exceeds ten to one in most countries, therefore there is no material save for water does man consume in such tremendous quantities (Brunauer & Copeland, 1964).
BSC. CIVIL AND CONSTRUCTION ENGINEERING
Eng. Goro Evans
Brian Kambona Onyango