Alkali aggregate reaction (AAR) – Accelerated Brazilian concrete prism test

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Title: Alkali aggregate reaction (AAR) – Accelerated Brazilian concrete prism test

Author(s): Leandro Francisco Moretti Sanchez, Selmo Kuperman, Paulo Helene

Publication: IBRACON

Volume: 4

Issue: 4

Appears on pages(s): 575 581

Keywords: alkali-aggregate reaction, test methods, concrete prism test (CPT), accelerated Brazilian concrete prism test (ABCPT)

Date: 10/10/2011

Abstract:
There are many test methods used in the laboratory to prevent alkali-aggregate reaction (AAR). However, up to now, there is no consensus if they are reliable and efficient. This work presents the development of a new and accelerated concrete prism test called ABCPT (accelerate Brazilian concrete prism test) as an attempt to create a reliable and fast test that can analyze and classify the potential reactivity of aggregates in the laboratory. For this research, six aggregates with different lithologies were used. The methods CPT, ACPT and ABCPT were carried out with all the aggregates and a comparative analysis among all tests was performed. ABCPT seems to have a great potential to analyze and classify aggregates in the laboratory although, it needs further testing with other lithologies to be confirmed as feasible.


Brazilian Institute of concrete, International Partner Access.

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