Papers for Session S-1

Although the history of concrete dates back to the Egyptian time, precast concrete is a recent development and is considered as the most versatile building material at the present time. In advanced countries precast concrete components are produced in mass in the factories thus saving in material, cost and time of construction for buildings and bridges. Most up-to-date knowledge in cement and concrete is being utilised and various types of cement and aggregates are employed. Various types of machines and equipment have been developed for the precast concrete industry. Particular attention has been very recently paid in producing light-weight concrete products so as to reduce handling, transportation and erection cost, which account a considerable proportion of the total cost.