Advantage And Disadvantage Of Cement

1. INTRODUCTION Concrete is the most widely used material in the built environment. Concrete mainly consists of cement, aggregates, water and admixtures. Most of the concrete is made up of aggregates which are inert granular materials such as sand, crushed stone or gravel. Cement acts as the main binding phase in concrete. The expansion of the construction industry it is necessary to develop low cost and more efficient types of concrete while maintaining sustainability. It is estimated that the present consumption of concrete in the world is of the order of 10 billion tonnes(12 billion tons) every year. Humans consume no material except water in such tremendous quantities. The ability of concrete to withstand the action of water without

A high amount of cement not only affects the production costs, but also has negative effects on the heat of hydration and may cause shrinkage problems. Replacing cement with mineral admixtures seems to be a feasible solution to these problems. Furthermore, incorporation of mineral admixtures may positively affect the durability of concrete. The advantages of UHPC are numerous and typically include reduced global costs such as formwork, labor, maintenance and speed of construction. For more than a decade, UHPC has been used by innovative precasters worldwide in ways that complement their existing businesses by expanding their product ranges to include new solutions for structural and/or architectural markets. Applications include bridge beams and decks, solid and perforated wall panels/facades, urban furniture, louvers, stairs, large-format floor tiles, pipes and marine structures.

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