Properties of high-volume fly ash concrete incorporating nano-SiO2 |
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Authors: | Gengying Li |
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Affiliation: | Department of Civil Engineering, Shantou University, Shantou 515063, People's Republic of China |
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Abstract: | This paper presents a laboratory study on the properties of high-volume fly ash high-strength concrete incorporating nano-SiO2 (SHFAC). The results were compared with those of control Portland cement concrete (PCC) and of high-volume fly ash high-strength concrete (HFAC). Assessments of these concrete mixes were based on short- and long-term performance. These included compressive strength and pore size distribution. Significant strength increases of SHFAC compared to the high-volume fly ash high-strength were observed as early as after 3 days curing, and improvements in the pore size distribution of SHFAC were also observed. In this work, the hydration heat of nano-SiO2 fly ash cement systems was also studied in comparison to the fly ash-cement systems and to the pure cement systems. In addition, the weight change of fly ash incorporating nano-SiO2, fly ash, and nano-SiO2 alone after immersed in saturated lime solution was also studied. |
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Keywords: | Nano-SiO2 High-performance concrete Compressive strength Pore size distribution |
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