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Assessment of Test Methods for Supplementary Cementitious Materials

Project Summary

Supplementary cementitious materials (SCMs) are a critical component of many concrete mixtures, with Class F fly ash being the most widely used in Texas because it reduces concrete cost and improves long-term strength and durability. Increasingly, power plants are blending coals, producing fly ash with potentially different properties than the previously common Class F fly ash from Texas lignite coal. Further, fly ash suppliers can blend fly ashes from different sources and are increasingly interested in reclaiming ashes from landfills and remediating ashes that do not meet specifications. The changing landscape for fly ash demands rigorous testing to ensure that the fly ashes still perform as expected based on their ASTM C618 Class F classification. This project will evaluate a variety of fly ashes from blended, reclaimed, and remediated sources for chemical and physical characteristics and performance in cement paste, mortar, and concrete mixtures. In addition, since ASTM C618 has been shown to be inadequate for qualifying SCMs, new tests will be developed and evaluated to characterize the reactivity of SCMs and their performance in concrete.

Project Number

0-6966

Status

Completed & Adopted

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Project Details

Start Date

9/1/2017

End Date

1/31/2021

Performing Institution(s)

Center for Transportation Research (CTR)

Research Team

RS: Maria Juenger

Sponsor

Project Manager

Joanne Steele

Contract Specialist

Barbara Cisneros

TxDOT Advisor

MTD (Andy Naranjo, Rachel Cano, Cliff Coward)
AUS (Michael Botzaritch)

Amount Funded

FY18: $157,483
FY19: $162,623
FY20:$112,906

Source

TxDOT RTI

Publications from this Project

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Functional Area

Construction, Maintenance and Materials

Index Terms

Fly ash
Cement
Materials tests
Materials selection

Lead University

CTR

Researcher

Juenger, Maria C. G.

TxDOT District

MTD
AUS

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Record Added:

10/18/2017

Record Updated:

7/28/2023 5:32 AM EDT

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