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Title:

Evaluating ASR Mitigation Potential of Supplementary Cementing Materials and Lithium Admixture in the Presence of Potassium Acetate Deicer - Revised EB-70 Test Method
Cover of Evaluating ASR Mitigation Potential of Supplementary Cementing Materials and Lithium Admixture in the Presence of Potassium Acetate Deicer - Revised EB-70 Test Method

Accession Number:

01363264

Record Type:

Component

Abstract:

Recently a deicer-modified mortar bar test method, revised EB-70 test method, was developed to evaluate aggregate reactivity in the presence of potassium acetate deicer. This test employs a soak solution with a composition of 3M KAc and 1N NaOH, wherein the mortar bars with the suspect aggregates are exposed over a period of 28 days, and the mortar bar expansion is periodically recorded. Previous research has shown that this test captures the interactions that occur between a concentrated deicer solution and a highly alkaline environment within the pore solution of concrete. Results from investigation of over 30 aggregates in this test method yielded positive correlation with the field performance of the aggregate. In this paper the applicability of this test method to evaluate effectiveness of typical ASR mitigation measures such as fly ashes, slag and lithium admixtures, was investigated. Findings from these studies suggest that the revised EB-70 test method can be employed to evaluate the effectiveness of ASR mitigation measures in the presence of potassium acetate deicer. Factors such as the chemical composition of the SCM and its dosage rate in the mixture appear to play a significant role in effectively mitigating ASR in the presence of deicers.

Supplemental Notes:

This paper was sponsored by TRB committee AFN30 Durability of Concrete

Monograph Accession #:

01362476

Report/Paper Numbers:

12-4705

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Wingard, David Wayne
Math, Sujay
Rangaraju, Prasada Rao

Pagination:

20p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Uncontrolled Terms:

Potassium acetate

Subject Areas:

Aviation; Materials; Pavements; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-4705

Files:

PRP, TRIS, TRB

Created Date:

Feb 8 2012 5:26PM