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Construction & building materials v.168, 2018년, pp.622 - 632   SCIE SCOPUS
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Combined usage of micro-silica and nano-silica in concrete: SP demand, cementing efficiencies and synergistic effect

Li, L.G. (School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China ) ; Zheng, J.Y. (School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China ) ; Zhu, J. (School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, China ) ; Kwan, A.K.H. (Department of Civil Engineering, The University of Hong Kong, Hong Kong, China ) ;
  • 초록  

    Abstract It is well known that the addition of micro-silica (MS) can improve the strength and durability of concrete and the addition of nano-silica (NS) can also improve certain properties of concrete. However, systematic research is still needed to exploit the benefits of combined usage of MS and NS, and more specifically, to evaluate their cementing efficiencies and synergistic effect. In this study, an experimental program was launched to investigate the combined effects of MS and NS on the compressive behaviour of concrete. Concrete mixes with varying water/cementitious materials (W/CM) ratio, MS content and NS content but similar workability were produced for testing. It was found that NS has much higher superplasticizer (SP) demand and cementing efficiency than MS. Nevertheless, at the same strength, the SP demand of (MS + NS) is not higher than that of pure cement. More importantly, the combined usage of MS and NS offers certain synergistic effect, as evaluated by a new formula proposed in this study. Highlights Nano-silica (NS) has much higher superplasticizer (SP) demand and cementing efficiency than micro-silica (MS). At the same strength, the SP demand of (MS + NS) is not higher than that of pure cement. The combined usage of MS and NS offers certain synergistic effect, as evaluated by a new formula proposed in this study.


  • 주제어

    Cementing efficiency .   Compressive behaviour .   Micro-silica .   Nano-silica .   Superplasticizer .   Synergistic effect.  

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