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Determining an Aggregate's Potential for Forming Alkali-Silica Reactivity (ASR) Gels in Concrete

Project Information

Project ID: 
FHWA-PROJ-11-0069
Project Status: 
Completed
Start Date: 
Saturday, October 1, 2011
End Date: 
Saturday, December 31, 2016
FHWA Program: 
Infrastructure
FHWA Subprogram: 
Pavement and Materials
FHWA Topics: 
Roads and Bridges--Pavement and Materials; Research/Technologies--Turner-Fairbank Highway Research Center (TFHRC)
TRT Terms: 
Concrete Aggregates; Alkali Silica Reactions; Spectroscopy; Infrastructure; Research; Pavements
FHWA Discipline: 
Pavement and Materials
TRB Subject Area: 
Pavements

Contact Information

First Name: 
Terry
Last Name: 
Arnold
Telephone: 
(202) 493-3305
Email Address: 
Team: 
Infrastructure Materials Team
Office:
Office of Infrastructure Research and Development
Office Code: 
HRDI-10

Project Details

Project Description: 

The broad objective of this project is to understand the fundamental changes that take place when the alkali-silica reaction is accelerated. It is anticipated that this research will be instrumental to providing fundamental information regarding changes induced in the mechanism of the alkali-silica reactivity (ASR) reaction by accelerating it under aggressive laboratory conditions. This will in turn aid in the design of a more reliable rapid test method with better correlation to field performance.

Deliverables

Deliverable Name: 
Test to evaluate aggregates' potential for forming alkali-silica reactivity (ASR) gel
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
The approach involves chemically attacking the aggregate and evaluating the products. Soluble Si will be examined using x-ray fluorescence (XRF), and the presence of alkali-silica reactivity (ASR) will be determined using Raman spectroscopy.