RILEM TC 247-DTA round robin test
mix design and reproducibility of compressive strength of alkali-activated concretes
John L. Provis (University of Sheffield)
Kamel Arbi (Delta Concrete Consult B. V.)
Susan A. Bernal (University of Leeds, University of Sheffield)
Dali Bondar (Queen's University Belfast)
Anja Buchwald (ASCEM B.V.)
Arnaud Castel (University of New South Wales)
Sundararaman Chithiraputhiran (USG Corporation)
Guang Ye (TU Delft - Microlab, TU Delft - Materials and Environment)
Y. Zuo (TU Delft - Microlab, TU Delft - Materials and Environment)
G.B. Cavadini (External organisation)
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Abstract
The aim of RILEM TC 247-DTA ‘Durability Testing of Alkali-Activated Materials’ is to identify and validate methodologies for testing the durability of alkali-activated concretes. To underpin the durability testing work of this committee, five alkali-activated concrete mixes were developed based on blast furnace slag, fly ash, and flash-calcined metakaolin. The concretes were designed with different intended performance levels, aiming to assess the capability of test methods to discriminate between concretes on this basis. A total of fifteen laboratories worldwide participated in this round robin test programme, where all concretes were produced with the same mix designs, from single-source aluminosilicate precursors and locally available aggregates. This paper reports the mix designs tested, and the compressive strength results obtained, including critical insight into reasons for the observed variability in strength within and between laboratories.
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