New type admixtures were developed for High-fluidity and Super-low shrinkage concretes with water-cement ratio of 40-55%. Properties fresh hardened using these studied by laboratory test. concretes, such as strength durability investigated experimentally. Furthermore, effects reducing restraining cracks verified test on drying cracking restrained concrete. More than 10% drying-shrinkage reducti...

In this study, the drying shrinkage cracking characteristics of concrete containing 30% fly ash were investigated for various dune sand (DS) replacements and unit water contents. results compressive strength, mixture with a DS-to-fine aggregate (DS/FA) ratio 10% showed highest value, which was 17.6% higher than lowest value. However, in restrained cracking, mixtures DS/FA 20% crack resistance, ...

Mechanisms of shrinkage and the conditions leading to cracking of drying soils are addressed. An elastic formulation of the hydro-mechanical drying problem is presented. It relies on the analogy which can be drawn between the desiccation process and thermo-elasticity. The validity of the analogy is discussed in the light of finite element simulations of air drying experiments on a rectangular s...

Plastic shrinkage cracking is a problem for the service life, aesthetics and durability of concrete members. It occurs when tensile stresses are induced in fresh concrete, through plastic that restrained. caused by negative capillary pressure build-up, but can be controlled to prevent shrinkage. In this paper, control using high-capacity sensors explored. The behaviour self-compacting mix desig...

High early age concrete temperatures can lead to many problems such as an increased rate of cement hydration, well moisture loss from fresh which ultimately the occurrence plastic shrinkage cracking. Concrete is also batched and cast at various ambient greatly influences temperature development after placement. There a need understand influence on cracking concrete. This study investigated over...