1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, China
Abstract: The durability of reinforced concrete components made from coral aggregate and different admixtures in marine environment were compared. The corrosion behavior of reinforcement in modified coral aggregate concrete (MCAC) was analyzed by electrochemical measurement. The research conclusions are as follows: (Ⅰ) the dynamic potential polarization, capacitance-reactance and impedance modulus curves of steel bars in MCAC were tested by linear polarization and electrochemical impedance spectrum, and the influence of electrochemical parameters on steel bars corrosion was quantitatively analyzed. (Ⅱ) The durability coefficient of MCAC was proposed to represent the improved corrosion resistance value of steel bars in MCAC with FA, SF and GGBS. Compared to the MCAC without admixtures, the chloride resistance of the MCAC containing 10% SF, 20% GGBS, and 20% FA increased by 87.0%, 68.73%, and 50.15%, respectively. (Ⅲ) The regression analysis function of admixtures and corrosion rate of steel bars in MCAC was established, and the correction coefficient of admixtures to the corrosion rate of steel bars in MCAC was obtained.
1 Liu J, Ou Z. Arabian Journal for Science and Engineering. 2017, 43(4),1529. 2 Lyu B, Wang A, Zhang Z, et al. Cement and Concrete Composites, 2019, 100, 25. 3 Wang Y, Shui Z, Gao X, et al. Journal of Cleaner Production, 2019, 219 (10),763. 4 Shui Z, Sun T, Cheng S. Applied Clay Science, 2017, 141,111. 5 Wu Z, Yu H, Ma H, et al. Corrosion Science, 2020, 163,108238. 6 Chen C, Ji T, Zhuang Y. Construction and Building Materials, 2015, 98, 227. 7 Da B, Yu H, Ma H. Construction and Building Materials, 2016, 123, 47. 8 Niu D, Zhang L, Fu Q, et al. Construction and Building Materials, 2020, 238,117685. 9 Zhang L, Niu D, Wen B, et al. Construction and Building Materials, 2020, 258,119564. 10 Otieno B, Beushausen D, Alexander G. Cement & Concrete Composites, 2011,33(2), 240. 11 Otieno B, Beushausen D, Alexander G. Materials & Corrosion, 2015,63(9),777. 12 Pour M. Corrosion Science, 2009, 51, 426. 13 Valipour M, Shejarchi M, Ghods P. Cement and Concrete Composites, 2014, 48, 98. 14 Hussain R R. NDT & E International, 2011, 44(2), 158. 15 Yuan Y. Modeling, Identification and Control, 2009,7(2), 155. 16 Shamsad A. Anti-Corrosion Methods and Materials, 2014, 61(3), 158. 17 Cheng S, Shui Z, Sun T, et al. Construction and building Materials, 2018, 171 (20), 44. 18 Sun B L. Low Temperature Architecture Technology, 2014(8), 12 (in Chinese). 孙宝来. 低温建筑技术,2014(8), 12. 19 Wu W, Wang R, Zhu C, et al. Construction and Building Materials 2018,185 (10), 69. 20 Abreu C, Cristobal M, Losada R. Electrochim Acta, 2006, 51(8),1881. 21 Feng X, Tang Y, Zuo Y. Corrosion Science, 2011,53(4), 1304. 22 Da B, Yu H, Ma H, Wu Z. Journal of Testing and Evaluation, 2020, 2, 1537. 23 Zhao T J, Zhou Z H, Liu J C. Concrete, 2000(2), 12. (in Chinese) 赵铁军,周宗辉,刘君昌.混凝土,2000(2),12.