Title: Research on the influence of nano calcium carbonate on the durability of building concrete

Authors: Shoujie Han; Feng Qiu; Yunfeng Zhao

Addresses: School of Civil Engineering, Shangqiu Institute of Technology, Shangqiu 476000, China ' School of Civil Engineering, Shangqiu Institute of Technology, Shangqiu 476000, China ' School of Civil Engineering, Shangqiu Institute of Technology, Shangqiu 476000, China

Abstract: In view of the poor impermeability and carbonation resistance of building concrete materials, the influence of nano calcium carbonate on the durability of building concrete was studied in this paper. By determining the size of crystal particle size and calculating the carbonisation rate in the preparation process, the interface adsorption capacity of nano calcium carbonate was determined. Nano calcium carbonate is used to improve building concrete, and the strength loss rate and quality loss rate of concrete are calculated. The durability analysis of nano calcium carbonate on building concrete is completed. The results show that when the content of nano calcium carbonate is 2%, the impermeability of concrete specimens is always above 90%, indicating that the impermeability has been improved. After one month of carbonation, the maximum carbonation depth of concrete specimens is only 2.35 mm, which verifies that the improved impermeability and carbonation resistance are good.

Keywords: nano calcium carbonate; concrete for construction; durability; crystal; intermittent bubbling carbonisation method.

DOI: 10.1504/IJMMP.2023.130578

International Journal of Microstructure and Materials Properties, 2023 Vol.16 No.5, pp.334 - 347

Received: 30 Aug 2022
Accepted: 30 Jan 2023
Published online: 28 Apr 2023 *

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