TIME DEVELOPMENT OF SHRINKAGE OF HIGH PERFORMANCE CONCRETE

摘要

In the framework of the performed laboratory tests we researched the influence of constituent materials of fresh concrete mixture and water-binder ratio on the amount and time development of autogenous and total shrinkage of high performance concretes. The experiments were carried out under scheduled conditions of humidity and ambient temperature. For the sake of comparison, we also measured the respective amounts of autogenous and total shrinkage of a standard concrete featuring the same consistency and an adequate water-binder ratio. The paper presents the results of measuring autogenous and total shrinkage of high strength and normal strength concretes with different water-binder ratios ranging between 0.28 and 0.52, yet the same consistency achieved by adding chemical admixtures.