Testing dynamic segregation of self-consolidating concrete

作者：Shen Lin^*; Jovein Hamed Bahrami; Sun Zhihui; Wang Qian; Li Wenmei

来源：Construction and Building Materials, 2015, 75: 465-471.

DOI：10.1016/j.conbuildmat.2014.11.010

• Segregation
• Dynamic segregation
• Stability
• Self-consolidating concrete

Segregation is a common problem in self-consolidating concrete, which often uses a high dosage of high-range water-reducing admixture to achieve high flow and passing ability. Dynamic segregation, when the aggregate lags behind in flowing concrete, may be distinguished from static segregation, when the aggregate sinks in concrete at rest. In this study, a flow trough was developed to measure dynamic segregation. The trough was found to provide a promising method for measuring this behavior. Static and dynamic segregation were not always found to occur simultaneously, and the slump flow test was not always sufficient to detect dynamic segregation, especially over a long travel distance. A simple procedure was proposed to set the maximum flowing distance based on mix proportions and the flow trough results.

• 出版日期2015-1-30