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EFFECTS OF ALKALI-SILICA REACTION ON MECHANICAL PROPERTIES AND STRUCTURAL CAPACITIES OF REINFORCED CONCRETE STRUCTURES

Published

Author(s)

Long T. Phan, Fahim Sadek, Travis E. Thonstad, Hai S. Lew, Sorin Marcu, Jacob Philip

Abstract

This paper describes an ongoing, comprehensive research program being conducted at the National Institute of Standards and Technology (NIST) under the sponsorship of the U.S. Nuclear Regulatory Commission (NRC). The study aims to develop technical basis for evaluating effects of Alkali- Silica Reaction (ASR), which occurs when the high pH concrete pore solution reacts with certain aggregate mineral phases to form expansive ASR gel and create internal expansive forces that cause cracking in concrete, on engineering properties and structural capacities of reinforced concrete structures. Description of this study focusing on experimental evaluation of: (1) the influence of different degrees of steel confinement and ASR expansions (0.1%; 0.3%; 0.5% ultimate expansion) on concrete’s mechanical properties; (2) effects of ASR on the bonding between concrete and reinforcements (development and lap splice lengths) and on overall flexural capacities of reinforced concrete beams; and (3) effects of ASR on seismic performance of typical reinforced concrete walls with and without steel confinement in the wall boundary element, will be provided.
Volume
1
Issue
ISBN: 978-1-5108-9351-1
Conference Dates
August 4-9, 2019
Conference Location
Charlotte, NC
Conference Title
Structural Mechanics in Reactor Technology (SMiRT) 25

Keywords

Alkali-Silica Reaction, ASR Expansion, Bonding, Cracking, Reinforced Concrete

Citation

Phan, L. , Sadek, F. , Thonstad, T. , Lew, H. , Marcu, S. and Philip, J. (2020), EFFECTS OF ALKALI-SILICA REACTION ON MECHANICAL PROPERTIES AND STRUCTURAL CAPACITIES OF REINFORCED CONCRETE STRUCTURES, Structural Mechanics in Reactor Technology (SMiRT) 25, Charlotte, NC, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928434 (Accessed November 30, 2021)
Created January 30, 2020, Updated August 31, 2020