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Chloride Binding Capacity and Its Effect on the Microstructure of Mortar Made with Marine Sand

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  • Congtao Sun

    (Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
    Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China
    Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
    Nantong Research and Development Center of Marine Science and Technology, Institute of Oceanology, Chinese Academy of Sciences, Nantong 226004, China)

  • Ming Sun

    (School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)

  • Tao Tao

    (School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

  • Feng Qu

    (School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

  • Gongxun Wang

    (School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)

  • Peng Zhang

    (School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)

  • Yantao Li

    (Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China)

  • Jizhou Duan

    (Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China)

Abstract

Chloride binding capacity and its effect on the microstructure of mortar made with marine sand (MS), washed MS (WMS) and river sand (RS) were investigated in this study. The chloride contents, hydration products, micromorphology and pore structures of mortars were analyzed. The results showed that there was a diffusion trend for chloride ions from the surface of fine aggregate to cement hydrated products. During the whole curing period, the free chloride content in the mortars made by MS and WMS increased firstly, then decreased and stabilized finally with time. However, the total chloride content of three types of mortar hardly changed. The bound chloride content in the mortars made by MS and WMS slightly increased with time, and the bound chloride content included the MS, the WMS and the RS arranged from high to low. C 3 A·CaCl 2 ·10H 2 O (Friedel’s salt) was formed at the early age and existed throughout the curing period. Moreover, the volume of fine capillary pore with a size of 10–100 nm increased in the MS and WMS mortar.

Suggested Citation

  • Congtao Sun & Ming Sun & Tao Tao & Feng Qu & Gongxun Wang & Peng Zhang & Yantao Li & Jizhou Duan, 2021. "Chloride Binding Capacity and Its Effect on the Microstructure of Mortar Made with Marine Sand," Sustainability, MDPI, vol. 13(8), pages 1-12, April.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:8:p:4169-:d:532497
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    Cited by:

    1. Alisson Mendes Rodrigues & Fabiana Pereira da Costa & Suellen Lisboa Dias Beltrão & Jucielle Veras Fernandes & Romualdo Rodrigues Menezes & Gelmires de Araújo Neves, 2021. "Development of Eco-Friendly Mortars Produced with Kaolin Processing Waste: Durability Behavior Viewpoint," Sustainability, MDPI, vol. 13(20), pages 1-15, October.

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