Minnesota Department of Transportation

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Alkali Silica Reactivity (ASR)

 

Paving

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
Pit Number Coarse Aggregate Source Expansion Result

17001

Quartzite - Jeffers

0.095

52003

Quartzite - New Ulm

0.082

65056

Gneiss - Briellmaier

0.051

87002

Gneiss - Granite Falls

0.033

92001

Quartzite - Dell Rapids

0.114

92003

Quartzite - Sioux Falls

0.095