Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction (ASR) - Task 1: Assessing In-Situ Mechanical Properties of ASR-Affected Concrete
Fahim Sadek, Travis E. Thonstad, Sorin Marcu, Jonathan Weigand, timothy J. barrett, Hai S. Lew, Long T. Phan, Adam L. Pintar
This report describes the results of Task 1 of a five-task 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 overall 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. The report provided detailed information on experimental planning, measurements, and testing performed to achieve the objective of Task 1, assessing in-situ mechanical properties of ASR-affected concrete, and presented experimental results that quantified the effects of: (1) the influence of different degrees of steel confinement and (2) ASR-induced expansions (0.1 %; 0.3 %; 0.5 % designed target ultimate expansion) on concrete's mechanical properties, surface expansion, and crack development.
, Thonstad, T.
, Marcu, S.
, Weigand, J.
, barrett, T.
, Lew, H.
, Phan, L.
and Pintar, A.
Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction (ASR) - Task 1: Assessing In-Situ Mechanical Properties of ASR-Affected Concrete, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2121
(Accessed July 26, 2021)