Application of Modified ASTM C1260 Test for Fly Ash-Cement Mixtures

Chang Seon Shon, Shondeep L. Sarkar, Dan G. Zollinger

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The ASTM C1260 accelerated mortar-bar test is a commonly used method for rapid identification of potential alkali-aggregate reactivity and may also be used for assessing the effectiveness of supplementary cementitious materials in suppressing alkali-silica reactivity (ASR). A general criticism of this test method is the severity of test conditions. It is not uncommon for aggregates with a good field-performance track record and no history of ASR to test reactive by this method. The purpose of this study was to evaluate the effectiveness of fly ash in controlling expansion due to ASR, using a modified ASTM C1260 test. Three different strengths of NaOH solution were used to test reactive, potentially reactive, and nonreactive aggregates in the presence of Class F and Class C fly ash at 20% and 35% replacement by mass of cement. The other variables included high- and low-alkali cement, extended curing time, and a longer testing period of 28 days. A correlation was drawn between additional evaporable water and expansion due to ASR.

Original languageEnglish
Pages (from-to)93-106
Number of pages14
JournalTransportation Research Record
Issue number1834
Publication statusPublished - Jan 1 2003

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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