INFLUENCE OF NANO-CACO3 ON COMPRESSIVE STRENGTH AND MICROSTRUCTURE OF HIGH STRENGTH CONCRETE WITH HARDENING ACCELERATOR UNDER DIFFERENT CURING TEMPERATURE

Author(s): Miaozhou Huang, Tao Meng, Qinglei Xu, Menghua Wang
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 184-193
Total Pages: 961
Language : English

Abstract: Effect of nano-CaCO3 on the flow ability, compressive strength and microstructure of high strength concrete with hardening accelerator under two different curing temperatures were studied in this paper. The experiment results showed that adding nano-CaCO3 did not reduce the flow ability of concrete significantly, but the early compressive strength of concrete curing at two different temperatures were both improved by some extent when the dosage of nano-CaCO3 was suitable. The early compressive strength of concrete with hardening accelerator Ca(NO2)2 was decreased when the dosage of nano-CaCO3 was too low or too high, but improved at an optimum dosage. This indicated that hardening accelerator Ca(NO2)2 and nano-CaCO3 restricted each other with the developing of early compressive strength of high strength concrete. And the results of microstructure analysis were in agreement with the strength fluctuations.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00