【摘 要】
：
The distance between particles (DP) plays a key role in the flowability of fresh cement pastes.DP given by available literatures is an average value and independent with the particle size.Actually, co
【机 构】
：
School of Materials Science and Engineering, South China University of Technology, Guangzhou,China
【出 处】
：
中国硅酸盐学会水泥分会第六届学术年会
论文部分内容阅读
The distance between particles (DP) plays a key role in the flowability of fresh cement pastes.DP given by available literatures is an average value and independent with the particle size.Actually, coarse particles in cement paste need a larger DP to achieve same yield stress compared with fine particles.In present study, relationship between yield stress and DP for single-fraction cement pastes was established by introducing an exponential-type function.Then the function was theoretically deduced to evaluate Dp in binary-fraction cement pastes.For cement pastes with yield stress of 30 Pa, distance between coarse particle (48.51 μm) and fine particle (6.63 μm) was 5.00 μm, while distance between coarse particle (20.27 μm) and fine particle (6.63 μm) was only 2.57 rn.The reliability of Dp in binary-fraction cement paste was experimentally validated.This method can be applied in multi-fraction cement pastes, and Dp in consideration of particle size will give a deeper insight in the flowability and microstructural development of cement pastes.
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