Assessing Risk of D-Cracking in Concrete Aggregates

Project Details
STATUS

Completed

START DATE

04/01/15

END DATE

05/31/16

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, CP TECH, CTRE, MTC
SPONSORS

Midwest Transportation Center
USDOT/OST-R

Researchers
Principal Investigator
Franek Hasiuk
Co-Principal Investigator
Peter Taylor

Director, CP Tech

About the research

Portland cement concrete pavements in the midwestern US can suffer premature deterioration due to so-called D-cracking. One of the causes of this distress is that the pore size distribution within the aggregate will readily absorb water, but prevent it from evaporating due to surface tension effects. Saturated aggregates that are subjected to freezing will expand and crack, leading to damage in the pavement, starting near sawn joints. There are also some chemical effects, but these are outside the scope of this work.

The aim of this work was to conduct a proof-of-concept assessment of some innovative alternative approaches to assessing the risk of D-cracking in aggregates that will be rapid, cost-effective, and reliable.


Funding Sources:
Midwest Transportation Center
USDOT/OST-R ($25,000.00)
Total: $25,000.00

Contract Number: DTRT13-G-UTC37

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