Masters Theses

Abstract

"Concrete is produced more than any other material in the world. Sustainable construction is extremely important in today's industry and fly ash is the leading material for sustainable concrete design. The addition of fly ash improves many fresh and hardened concrete properties. However, the slow hydration process associated with fly ash makes the use of the material in large amounts undesirable in conventional construction. This study evaluated the hardened concrete and durability performance of several high-volume fly ash (HVFA) concrete mixes. The various HVFA concrete mixes evaluated within this study consisted of 70 percent replacement of portland cement by weight of cementitious material and water-to-cementitious ratios (w/cm) ranging from 0.30 to 0.45. Studies were conducted on hardened properties including: compressive strength, flexural strength, splitting tensile strength, and modulus of rupture. A shrinkage analysis was also performed to evaluate drying and free shrinkage. The durability performance of the HVFA concrete was also evaluated. Results obtained from the tests revealed that compressive strengths of HVFA concrete are comparable to portland cement concrete with a reduced w/cm. Also, a reduction in concrete shrinkage was observed for HVFA concrete. The durability testing showed HVFA concrete increased the corrosion resistance and decreased the chloride penetration. Finally, existing relationships for hardened material properties and durability of conventional concretes are applicable to HVFA concretes"--Abstract, page iii.

Advisor(s)

Volz, Jeffery S.

Committee Member(s)

Myers, John
Richardson, David Newton

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2011

Pagination

xiv, 151 pages

Note about bibliography

Includes bibliographical references (pages 147-149).

Rights

© 2011 Kyle Marie Marlay, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Concrete -- AdditivesConcrete -- Service life -- AnalysisFly ash

Thesis Number

T 9838

Print OCLC #

785140015

Electronic OCLC #

765306163

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