Durable concrete by packing density method

摘要

Concrete is a widely used construction material. There has been phenomenal growth in research and development activities to develop high performance concrete. However, high standards of durability are not being achieved in practice. We have a witnessed large number of existing structures which after a few years of construction have started showing signs of distress. This remains a big challenge for the engineers and technicians to ensure proper quality control of the raw material. This paper suggests a few measures to make the concrete durable thereby to ensure improvement of the service life of Reinforced Concrete Structures. This paper also gives an overview of the factors that make the concrete durable starting from the mix design process to the selection of suitable materials, mixing, transporting, placing, compaction and efficient curing. Emphasis needs to be given during process of concreting to obtain desired fresh and hardened properties of concrete by way of conducting proper checks and trials.