Journal Published Online: 26 April 2022
Volume 11, Issue 1

Electrical and Transport Properties of Cement Mortar Made Using Portland Limestone Cement

CODEN: ACEMF9

Abstract

This study examines the performance of cementitious systems made using clinker that is typically used to make Type II/V cement, limestone, and supplementary cementitious materials (SCMs). The porosity, formation factor, and pore connectivity of mortars are examined. The mortars are made with ordinary portland cement (OPC), OPC+limestone (LS), and portland limestone cement (PLC) with and without typical commercial SCMs (silica fume, fly ash, and slag). The porosity of both the PLC and OPC+LS mortars is approximately 4 % higher than the porosity of commercial OPC (which typically contains 2–3 % interground limestone) mortar. The porosity of PLC+SCM and OPC+LS+SCM mortars is also 2–6 % higher than the porosity of commercial OPC+ SCM mortars. The mixtures containing SCMs with alumina showed less of an increase in porosity because the limestone reacted with alumina to form carbo-aluminate reaction products. Despite the increase in porosity, there is no statistically significant difference between the formation factor of the PLC, OPC+LS, and OPC mortars without SCM. The PLC+SCM, OPC+LS+SCM, and OPC+SCM mortars had a higher formation factor than the plain OPC/PLC/OPC+LS mortars because of pore refinement. Pore refinement is also observed in PLC and OPC+LS mortars containing SCMs with alumina. The results of this study indicate that PLCs (ASTM C595/C595M-20, Standard Specification for Blended Hydraulic Cements) can be used as a direct replacement for OPCs (ASTM C150/C150M-20, Standard Specification for Portland Cement) without any significant reduction in performance as related to transport.

Author Information

Choudhary, Antara
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Ghantous, Rita M.
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Bharadwaj, Keshav
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Opdahl, Oliver Hudson
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Isgor, O. Burkan
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Weiss, W. Jason
School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, USA
Pages: 17
Price: $25.00
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Stock #: ACEM20210119
ISSN: 2379-1357
DOI: 10.1520/ACEM20210119