Abstract
It has been recognized that the use of superplasticizer is very effective to improve the workability of concrete. This study was planned to make clear the properties of fresh and hardened artificial lightweight aggregate concrete with superplasticizer, and to provide useful information for the mix proportion and the practice of such concrete.
The artificial lightweight coarse and fine aggregates were used. Also, the normal crushed stone and natural sand were used as the control aggregate. The effects of the type of aggregate, the type and kind of chemical admixture, the sand/aggregate ratio and cement content on the properties of super -plasticized lightweight aggregate concrete were experimentally investigated.
The slump, air content and compressive strength under various conditions were measured. The workability of superplasticized lightweight and normal aggregate concrete was evaluated by V.B. test, compacting factor test, rheological test and segregation test. It has been proved that the workability of superplasticized lightweight aggregate concrete could be improve as high as that of superplasticized normal aggregate concrete by choosing a suitable mix proportion.
