MIX DESIGN OF HIGH-STRENGTH CONCRETE FOR AIRPORT CONCRETE PAVEMENTS

In airport pavements, Portland cement concrete with 5N/mm2 of flexural strength is generally used, whereas that with higher strength is seldom adopted. To show the applicability of high-strength concrete to airport pavements, some factors necessary for mix design are studied and mix proportion is investigated. First, it is found from the basic researches that large-sized aggregates should be properly selected to obtain high-strength concrete, and both an amount of water and fine aggregates should be rightly selected. Then, the optimum mix proportion for high-strength concrete is determined, based on the laboratory tests using small-sized equipment.