Cements For Concrete Pavements Mixed Cement Or Type V with Fly Ash

In Spain the development of cement, specially for concrete pavements, has been based on making use of fly ash in cement production. Such a development was achieved after studying the characteristics of the available fly ash and the respective experiencies. The results led to a widespread use of this type of cement in paving works with concrete, and it is included in the present standards. According to such standards, this cement is de-signated as Mixed or Type V cement. Concerningits composition, the clinker quantity must be bet-ween 20 and 64%; so fly ash proportion must bebetween 36 and 800/0.