Study on Slump Retaining Property and Placing Performance between
Layers of Concrete Containing High-range Water Reducing and Air-entrainig Agent
By T. Ohtomo, J. Sakamoto, K. Harada and N. Mitsuishi
Concrete Journal, Vol.42, No.4, Apr. 2004
- Synopsis
- For the many kinds of concrete containig high-range water redusing and air-entraining agent comprised polycarboxylic ether system, with different mix-proportioning items, i.e. design slump, kind of cement, water-cement ratio and unit water content, slump retaining property, intial setting time and allowable period between concreting layers, which were determined by penetrating test, were measured under the various condition of kinds and quality of workability retaining component. And it was cleared that relationships between allowable period between concrete layers and intial setting time, workability retention time and loss of slump after required time respectively and that the affection of concrete tenperature for those properties.
- Keywords:
- High-range water reducing and air-entrainig agent, Allowable period between concreting layers, Setting property, Slump retaining property, Temperature of concrete, Placing performance
