Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on corrosion resistance of hydrophobic early strength mortar containing calcium formate
Highlights The addition of calcium formate realized the further improvement in the hydrophobicity of stearic acid modified mortar. The issue of worse corrosion resistance of concrete containing calcium formate was solved by stearic acid modification. The effect of calcium formate and stearic acid on hydrophobicity and corrosion resistance was studied.
Abstract Calcium formate has been used in concrete as an accelerator to promote cement hydration and obtain good early strength for the repair work of marine structural engineering. However, the use of calcium formate in concrete increases the risk of reinforcement corrosion and reduces the corrosion resistance of concrete. In this study, a new method of improving the corrosion resistance of mortar containing calcium formate has been proposed. It is found that mortar modified by stearic acid becomes hydrophobic, and the hydrophobicity is further improved after adding calcium formate. Mechanical property testing indicates that the fabricated mortar has better mechanical properties than the reference mortar. Moreover, the long-term effects of simulated seawater on the durability of the mortar were investigated. Compared to the reference mortar, the fabricated mortar exhibited better corrosion resistance. It is expected that the proposed method shows promise for future applications in the repair work of marine structural engineering.
Study on corrosion resistance of hydrophobic early strength mortar containing calcium formate
Highlights The addition of calcium formate realized the further improvement in the hydrophobicity of stearic acid modified mortar. The issue of worse corrosion resistance of concrete containing calcium formate was solved by stearic acid modification. The effect of calcium formate and stearic acid on hydrophobicity and corrosion resistance was studied.
Abstract Calcium formate has been used in concrete as an accelerator to promote cement hydration and obtain good early strength for the repair work of marine structural engineering. However, the use of calcium formate in concrete increases the risk of reinforcement corrosion and reduces the corrosion resistance of concrete. In this study, a new method of improving the corrosion resistance of mortar containing calcium formate has been proposed. It is found that mortar modified by stearic acid becomes hydrophobic, and the hydrophobicity is further improved after adding calcium formate. Mechanical property testing indicates that the fabricated mortar has better mechanical properties than the reference mortar. Moreover, the long-term effects of simulated seawater on the durability of the mortar were investigated. Compared to the reference mortar, the fabricated mortar exhibited better corrosion resistance. It is expected that the proposed method shows promise for future applications in the repair work of marine structural engineering.
Study on corrosion resistance of hydrophobic early strength mortar containing calcium formate
Song, Qingnan (Autor:in) / Wang, Qing (Autor:in) / Li, Zhe (Autor:in) / Xu, Shuangshuang (Autor:in) / Zhao, Yayun (Autor:in) / Zhang, Rui (Autor:in)
04.10.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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