Importance of the Curing Period Length on the Chloride Transport Through Concrete Containing SCMs

Author(s): Luna Molina F. J., Fernández Pérez A. and Alonso Alonso M. C.
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 438-447
Total Pages: 10
Language : English

Abstract: The fabrication of concretes containing supplementary cementitious materials (SCMs) is gaining force with the aim of reducing the production of Ordinary Portland Cement (OPC), the largest component of energy consumption and CO2 emissions generated during cement manufacturing. Concretes containing SCMs have the concern of the slower rate of strength development as consequence of the higher hydration times needed for the SCMs respect to plain OPC. Less work has been done on the effect of this slowdown in hydration on the durability performance of blended concretes. The present research studies the influence of the curing length on the diffusion of chlorides through concrete by means of ponding tests after 28 and 90 days of curing. Two types of concrete have been considered to know also the influence of the presence of SCMs, (1) 100% OPC and (2) 64% OPC + 30% Blast furnace slags (BFS) + 6% Limestone filler (LF). Results show that the extension of curing period from 28 to 90 days scarcely produces variations in the accumulation of chlorides on the concrete surface and in the chloride transport regardless the concrete tested. However, and in spite of the intrinsic scatter of the tests, a slightly decreasing tendency of the apparent chloride diffusion coefficient and a slightly increasing tendency of the surface chloride concentration were found when OPC concrete was used.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00