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Hydration Kinetics of High-Volume Fly Ash Mixtures for Concrete Paving Applications

Project Information

Project ID: 
FHWA-PROJ-14-0005
Project Status: 
Proposed
Start Date: 
Monday, March 3, 2014
End Date: 
Thursday, December 31, 2020
FHWA Program: 
Infrastructure
FHWA Subprogram: 
Pavement and Materials
FHWA Topics: 
Roads and Bridges--Design; Roads and Bridges--Pavement and Materials
TRT Terms: 
Infrastructure; Greenhouse Gases; Research; Materials; Concrete; Fly Ash; Cement; Hydration; X ray analysis
FHWA Discipline: 
Pavement and Materials
TRB Subject Area: 
Materials

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: 

Develop an understanding of the chemistry and phases that occur in fly ashes derived from different sources of coal and produced by different power plants. We will track the chemical and phase changes that occur during the hydration of cement pastes containing fly ashes and use this information to investigate ways of speeding up the reaction.  When this information has been developed we will investigate the chemistry of the scaling resistance of these concretes to deicing chemicals.

Goals:

Accelerate the setting time of very high-volume fly ash mixtures so they can be used in conventional concrete paving applications.

Deliverables

Deliverable Name: 
"New classification for fly ash. Method of accelerating the hydration of high-volume fly ash (HVFA) mixtures. Method of improving the resistance of HVFA concrete to deicing chemicals."
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
Current classification for fly ash (Type C or F) does not accurately reflect performance of the material.High volumes of fly ash delay the setting of concrete.Concretes containing high volumes of fly ash generally have poor resistance (scaling) to deicing