Yim Hong Jae, Kim Jae Hong, Kwon Seung Hee
Department of Construction and Disaster Prevention Engineering, Kyungpook National University, Sangju 37224, Korea.
School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea.
Materials (Basel). 2016 Mar 2;9(3):147. doi: 10.3390/ma9030147.
When cement-based materials are transported at a construction site, they undergo high pressures during the pumping process. The rheological properties of the materials under such high pressures are unknown, and estimating the workability of the materials after pumping is a complex problem. Among various influential factors on the rheology of concrete, this study investigated the effect of mineral and chemical admixtures on the high-pressure rheology. A rheometer was fabricated that could measure the rheological properties while maintaining a high pressure to simulate the pumping process. The effects of superplasticizer, silica fume, nanoclay, fly ash, or ground granulated blast furnace slag were investigated when mixed with two control cement pastes. The water-to-cement ratios were 0.35 and 0.50.
当水泥基材料在建筑工地运输时，它们在泵送过程中会承受高压。这些材料在如此高压下的流变特性尚不清楚，并且估计泵送后材料的工作性是一个复杂的问题。在影响混凝土流变学的各种因素中，本研究调查了矿物和化学外加剂对高压流变学的影响。制造了一种流变仪，它可以在保持高压的同时测量流变特性，以模拟泵送过程。研究了减水剂、硅灰、纳米粘土、粉煤灰或磨细粒化高炉矿渣与两种对照水泥浆混合时的影响。水灰比分别为0.35和0.50。
