Civil Engineering and Architecture Vol. 11(3), pp. 1576 - 1588
DOI: 10.13189/cea.2023.110337
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Experimental Investigation on Durability Study of Portland Slag Concrete with Influence of High-Volume Recycled Aggregate

T. Sujatha ^1,*, D.S.R. Murty ^2
1 Research Scholar, Department of Civil Engineering, Andhra University, Visakhapatnam, Andhra Pradesh, India
² Professor, Department of Civil Engineering, Andhra University, Visakhapatnam, Andhra Pradesh, India

ABSTRACT

The importance of environmental protection and conservation, as well as the utilization of sustainable materials, in modern construction, has more concern on the scarcity of natural aggregates. Because of this increasing interest in using recycled aggregates in construction, the use of recycled aggregates in concrete needs more concern about durability aspects rather than strength. Normally Recycled Aggregate concrete (RAC) contains more porosity and water absorption. More studies reveal that recycled aggregate concrete has less durability than conventional concrete. In this regard, current experimental investigation was carried out to determine the durability of RAC with the use of sustainable materials i.e., Portland slag cement was used instead of OPC. M-sand as an alternative for river sand, Natural coarse aggregate (NCA) was replaced with recycled aggregate by various percentages (30, 45 and 60 percent) and Nano silica. The cube strength of concrete was optimum at 45% replacement of recycled aggregates with natural coarse aggregates at all grades, the percentage of strength difference between 28 and 180 days compressive strength about 27%. Concrete durability properties (RCPT, Permeability, water absorption and Acid resistance) were tested at various replacement percentages for M20, M25, M30 and M35 grades. Chloride ion permeability was reduced about 56% at higher concrete grades (M30 & M35) due to Nano silica at 180 days. At 90 days, the acid effect on RAC strength loss was reduced by roughly 5%. Nano silica is added to higher grades to decrease the water demand and enhances the durability and strength properties.

KEYWORDS
Portland Slag Cement, M-Sand, Recycled Coarse Aggregate (RCA), Recycled Aggregate Concrete (RAC), Nano Silica (NS)

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] T. Sujatha , D.S.R. Murty , "Experimental Investigation on Durability Study of Portland Slag Concrete with Influence of High-Volume Recycled Aggregate," Civil Engineering and Architecture, Vol. 11, No. 3, pp. 1576 - 1588, 2023. DOI: 10.13189/cea.2023.110337.

(b). APA Format:
T. Sujatha , D.S.R. Murty (2023). Experimental Investigation on Durability Study of Portland Slag Concrete with Influence of High-Volume Recycled Aggregate. Civil Engineering and Architecture, 11(3), 1576 - 1588. DOI: 10.13189/cea.2023.110337.