Criteria for Selecting Mixtures Resistant to Physical Salt Attack

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Title: Criteria for Selecting Mixtures Resistant to Physical Salt Attack

Author(s): Karthik H. Obla and Robert C. O’Neill

Publication: Special Publication

Volume: 317

Issue:

Appears on pages(s): 1-20

Keywords: physical salt attack, PSA, sulfate attack, specifications

Date: 6/1/2017

Abstract:
This paper presents the portion of a larger study and pertains to resistance of concrete to physical salt attack. The resistance of concrete to physical salt attack was evaluated by partially immersing concrete prisms in sulfate solution. The physical salt attack test results were correlated with results of rapid index test methods that provide an indication of the transport characteristics of concrete. Rapid index test methods included were the rapid chloride permeability, rapid migration, conductivity, absorption, and initial and secondary sorptivity. A set of tests and specification criteria that can reliably classify mixtures based on their resistance to physical salt attack are proposed. A new test procedure that can evaluate the resistance of concrete to physical salt attack within 50 days has also been developed.