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Open AccessArticle

Investigating the Effects of Polyaluminum Chloride on the Properties of Ordinary Portland Cement

1
Department of Civil Engineering, Pusan National University, Busan 46241, Korea
2
Department of Ocean Civil Engineering, Gyeongsang National University, Gyeongsangnam-do 53064, Korea
3
HK Engineering and Consultants, Busan 46220, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(20), 3290; https://doi.org/10.3390/ma12203290
Received: 5 September 2019 / Revised: 5 October 2019 / Accepted: 8 October 2019 / Published: 10 October 2019
(This article belongs to the Special Issue Testing of Cement-Based Materials)
This study investigates the mechanical and microstructural properties of paste comprising ordinary Portland cement (OPC) added with polyaluminum chloride (PACl). The properties of the resulting mixture are analyzed using compressive strength, X-ray diffraction, scanning electron microscopy (SEM), mercury intrusion porosimetry, and thermogravimetric analysis. The results show that the addition of PACl improves the mechanical properties of OPC paste, that calcium-(aluminum)-silicate-hydrate (C-(A)-S-H) gel and Friedel’s salt are the major products forming from the reaction with the aluminum and chloride ions in PACl, and that the portlandite content decreases. Moreover, the size and number of micropores decrease, and compressive strength increases. All these phenomena are amplified by increasing PACl content. SEM images confirm these findings by revealing Friedel’s salt in the micropores. Thus, this work confirms that adding PACl to OPC results in a mixture with superior mechanical and microstructural properties. View Full-Text
Keywords: polyaluminum chloride; ordinary portland cement; Friedel’s salt; chloride ion polyaluminum chloride; ordinary portland cement; Friedel’s salt; chloride ion
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MDPI and ACS Style

Kim, T.; Kang, C.; Hong, S.; Seo, K.-Y. Investigating the Effects of Polyaluminum Chloride on the Properties of Ordinary Portland Cement. Materials 2019, 12, 3290.

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