Effects of Shirasu natural pozzolan and limestone powder on the strength and aggressive chemical resistance of concrete

Van Toan Pham

Meng Phalkong

Phuong Trinh Bui

Ogawa Yuko

Kawai Kenji

Construction and Building Materials

This study investigated the effects of using limestone powder and Shirasu natural pozzolan, as partial replacements for fine aggregate, on the mechanical properties and resistance of concrete to an aggressive solution containing 3% H2SO4 and 5% MgCl2. The data show that replacing 5% of the fine aggregate with limestone powder results in more severe deterioration of the concrete by the chemical solution. However, replacing 55% of the fine aggregate with Shirasu both increases compressive strength after a 28-day cure and improves chemical resistance of concrete. In addition, the deterioration mechanism of concrete immersed in the aggressive solution was examined in this study.

Shirasu natural pozzolan

Limestone powder

Sulfuric acid

Magnesium chloride

Compressive strength

Chemical resistance

eng

Elsevier

© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。

[ISSN] 0950-0618

[DOI] 10.1016/j.conbuildmat.2019.117679

[DOI] https://doi.org/10.1016/j.conbuildmat.2019.117679