Materials and Road Research

Materials and Road Research | Concrete engineering

Coarse Aggregate Alkali Silica Reactivity (ASR)

Introduction

MnDOT Specification for Concrete Pavement and Concrete Bridge Decks require mitigation of reactive coarse aggregate identified as quartzite or gneiss.

Requirements

• MnDOT requires mitigation based upon the alkali silica reactivity (ASR) ASTM C1293 expansion test results for each individual coarse aggregate source.
• Review MnDOT Specifications to determine mitigation requirements.
• Contact the MnDOT Concrete Unit if the proposed coarse aggregate source is not listed on the table below.

ASTM C1293 Test Results