Abstract
The corrosion property of a new cemented sand, gravel, and rock (CSGR) composition under water pressure was studied in this paper. The results showed the order of magnitude of hydraulic conductivity of CSGR was \(10^{-10}\hbox { m/s}\) and decreased to half of the initial value after 140 days of corrosion. Under constant water pressure, soluble \(\hbox {Ca}^{2+}\) was minimal and tended to stabilize. In the research, the following results were found: (1) under water pressure, the curves of the cumulative seepage quantity of CSGR, after curing for 43 days, could be divided into two phases, and the hydraulic conductivity value in the second stage was lower than that in the first stage, indicating that a self-healing phenomenon appeared in the corrosion process. (2) After curing for 1 year, the order of magnitude of the hydraulic conductivity of CSGR could reach \(10^{-11}\hbox { m/s}\), and the amount of soluble \(\hbox {Ca}^{2+}\) was minimal. (3) Environmental scanning electron microscope, X-ray diffractometry, thermogravimetric-differential thermal analyser, and mercury intrusion porosimetry revealed a minimal amount of \(\hbox {Ca}(\hbox {OH})_{2}\) inside CSGR. Thus, the dissolved \(\hbox {Ca}^{2+}\) was minimal, and the anti-corrosion performance did not be deteriorated but tended to be stable. (4) Corrosion affected the mortar porosity slightly, similar to that of specimen subjected to standard curing.
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Jia, J., Liu, Z., Feng, W. et al. Water Pressure Induced Corrosion of Cemented Sand, Gravel, and Rock (CSGR). Arab J Sci Eng 43, 2083–2092 (2018). https://doi.org/10.1007/s13369-017-2698-5
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DOI: https://doi.org/10.1007/s13369-017-2698-5