Summary of 4-years of research at IIT Madras on concrete with limestone cal- cined clay cement (LC3)

Author(s): Ravindra Gettu, Manu Santhanam, Radhakrishna G. Pillai, Yuvaraj Dhandapani, T. Sakthivel, Sripriya Rengaraju, Sundar Rathnarajan, Fathima Suma M., Anusha S. Basavaraja, Sanoop Prakasan and Nithya Nair V.G.
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 473-480
Total Pages: 8
Language : English

Abstract: Various properties of limestone calcined clay cement (LC3) as a binder and those of concretes made with LC3 were assessed during the last four years at IIT Madras to understand its potential as an alternative mainstream cement. LC3 from two major industry-scale productions was used in the evaluation, and the major findings from the research are summarized in this paper. LC3 concretes exhibit compressive strength development comparable to that of concrete made with ordinary portland cement (OPC). In general, they were found to have higher resistance to chloride ingress, moisture ingress, gas permeation, sulphate attack and corrosion-induced cracking, when compared to that of concretes of similar strength grade and/or mixture proportions but having other binders. From the assessment of chloride threshold and carbonation, LC3 concretes were found to have a lower chloride threshold for rebar corrosion and higher carbonation rate than similar strength concretes with OPC and fly ash. However, the service life under chloride attack is expected to be significantly longer for a reinforced concrete structure with LC3 than other commonly used concretes. The ecological impact of LC3 on the cement and concrete production was also found to be positive with a dramatic decrease in carbon footprint when LC3 replaces OPC.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00