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Home > Events > Conventions > Current Convention > Sessions and Events
C = Duke Energy Convention Center; H = Hyatt Regency Cincinnati
MINI SESSION: Durability of Self-Consolidating Concrete (SCC)
Mon, October 21, 2019 11:15 AM - 12:15 PM, C- 206
The focal subject of the presentations will be on the durability behavior of self-consolidating concrete (SCC). Durability aspects are primarily related to specifics of the mixture design parameters of SCC. The scope involves theoretical and experimental investigations as well as field case studies. The session should be of particular interest to concrete practitioners and researchers.Learning Objectives: (1) Summarize current research and field experiences on SCC and educate the audience about its durability performance;(2) Explain the durability behavior of SCC and the influential factors related to constituent materials, mixture designs and exposure conditions;(3) Identify multiple approaches to improve the durability of SCC;(4) Recognize durability requirements of SCC in relevant North American and European guidelines and standards.
Durability Of SCC
Presented By: Miles Zeman
Affiliation: Dura-Stress Inc
Description: Research proving that higher spread with better sediments creating highest durability statistically measured with SRT results. Special focus will be on the resistance of SCC to highly aggressive environments involving salts, typical for costal zones.
An Overview on High-temperature Behavior of Self-consolidating Concrete
Presented By: Patrick Bamonte
Affiliation: Politecnico di Milano
Description: The presentation aims to give an overview on the high-temperature behavior of self-consolidating concrete. After a brief introduction on the main issues related to concrete at high temperature and on standard provisions, the effects of heating (in terms of insulating power and decay of mechanical properties) are illustrated, with data gathered from different experimental campaigns carried out in the US and Europe. The fundamental problem of explosive spalling, with its dire consequences on the bearing capacity, is also tackled, with particular emphasis on the updated provisions given in the new version of the Eurocode for Fire Design (EN 1992-1-2).
Freezing/thawing Durability and a Predictive Model of High-volume Fly Ash Self-consolidating Concrete
Presented By: Sen Du
Affiliation: Washington State University
Description: Replacing more than 50% of the cement in self-consolidating concrete with fly ash will produce high-volume fly ash (HVFA) SCC, which will likely reduce the cost and environmental footprints of SCC. In cold climates, the susceptibility of HVFA SCC to freezing/thawing cycles is a durability concern if no appropriate measures were taken, because HVFA concrete usually exhibits lower early-age mechanical properties than ordinary Portland cement (OPC) concrete. This laboratory study focused on some possible approaches that can improve the freezing/thawing durability of HVFA-SCC, including enhancing its transport properties by admixing effective chemical admixtures, improving its paste by admixing trace amount of graphene oxide nanosheets, or improving its interfacial transition zone (ITZ) by surface coating the coarse aggregate with Nano silica-modified paste. The synergistic effects of these approaches were investigated. We conclude with a model that considers fly ash particles a new phase in the HVFA SCC, to predict its performance (esp. modulus of elasticity) in the freezing/thawing test.