Sustainable approach of beam column joint developed using high volume fly-ash concrete

• Main Authors: Raj, P. S. Aravind, Sundaresh, J., Divahar, R.
• Format: Conference Proceeding
• Language: English
• Subjects: Axial loads; Beam-columns; Compressive strength; Ductility tests; Earthquake loads; Emissions; Failure mechanisms; Fly ash; Joints (junctions); Lateral displacement; Lateral loads; Performance evaluation; Seismic response; Spalling
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0222298

The primary objective of the present study is to evaluate the sustainable limit of fly-ash that can be used to replace cement in the concrete used for the beam-column joint subjected to seismic loading. Experimental study were performed on four series of specimens with two specimens on each series to evaluate the impact of High Volume Fly Ash (HVFA) replacement in the concrete instead of cement. The specimens when subjected to reversed quasi-static lateral loading and an axial loading with constant intensity and the failure mechanisms were observed. The crack patterns and the crushing of concrete are found to be similar in all the specimens and no any excessive cracks or spalling were observed in the beam column specimens with HVFA in the concrete. Detailed study on the beam column specimen were performed by evaluating the hysteresis response, lateral strength capacity, lateral displacement characteristic and ductility ratio. It was able to conclude that the HVFA replaced specimens were exhibiting superior performance in all the characteristics than the control specimens when the specimens are cured for 91 days. Thus, from the experimental results, it can be summarized that the replacement of the cement to a significant volume by HFVA has proven with impressive results which are leading the concrete to become more sustainable with reduced carbon emission without compromising the seismic performance of the Specimens.