| Issue |
MATEC Web Conf.
Volume 322, 2020
MATBUD’2020 – Scientific-Technical Conference: E-mobility, Sustainable Materials and Technologies
|
|
|---|---|---|
| Article Number | 01009 | |
| Number of page(s) | 6 | |
| Section | E-mobility, Sustainable Materials and Technologies | |
| DOI | https://doi.org/10.1051/matecconf/202032201009 | |
| Published online | 14 October 2020 | |
Effect of limestone powder on strength and permeability of cementitious mortars
1 National Ilan University,,Department of Civil Engineering, Shennong Rd., I-Lan 260, Taiwan
2 Czech Technical University in Prague, Faculty of Civil Engineering, Department of Materials Engineering and Chemistry, Thákurova 7, 166 29 Prague 6, Czech Republic
* Corresponding author: wtlin@niu.edu.tw
This study investigated the mechanical properties and durability of mortar specimens containing various quantities of waste limestone powder (0%, 10%, 20%, and 30% of the weight of cement). The mechanical properties were evaluated in terms of flowability, compressive strength, and splitting tensile strength. Permeability was evaluated in terms of resistivity, absorption, and rapid chloride penetration (total charge- passed). Test results revealed that replacing 10% of the cement with limestone powder improves both mechanical performance and durability. However, reducing the cement content reduced the availability of hydration products to fill the pores in the microstructure. The hydration product of limestone powder was mainly calcium hydroxide, which undermines the development of strength in the paste. Nonetheless, our results indicate that waste limestone powder is suitable for the partial replacement of cement.
© The Authors, published by EDP Sciences, 2020
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