High volume flyash concrete reinforced with hybrid fibers

Sethu Mathavan, R 2016, High volume flyash concrete reinforced with hybrid fibers, Masters by Research, Civil, Environmental and Chemical Engineering, RMIT University.


Document type: Thesis
Collection: Theses

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Title High volume flyash concrete reinforced with hybrid fibers
Author(s) Sethu Mathavan, R
Year 2016
Abstract Fly ash substitution to cement is a well-recognized approach to reduce CO2 emissions. Although fly ash concrete is prone to brittle behavior, researchers have shown that addition of fibers could reduce brittle behavior. Previous research efforts seemto have utlised a single type of fiber or two types of fibers. In this research, three types of fibers, steel, polypropylene, and basalt as 0%, 0.50%, 0.75%, and 1% by volume of concrete, were mixed in varying proportions with concrete specimens substituted with 50% fly ash (class F). All specimens were tested for compressive strength, indirect tensile strength, and flexural strength over a period of 3 to 56 days of curing. Test results showed that significant improvement in mechanical properties could be obtained by a particular hybrid fiber reinforcement combination (1% steel fiber, 0.75% polypropylene fiber, and 0.75% basalt fiber). The strength values were observed to exceed previous research results. Workability of concrete was affected when the fiber combination exceeded 3%.Thus a limiting value for adding fibers and the combination to achieve maximum strengths have been identified in this research.
Degree Masters by Research
Institution RMIT University
School, Department or Centre Civil, Environmental and Chemical Engineering
Subjects Structural Engineering
Construction Materials
Keyword(s) High volume flyash concrete
Hybrid fibers
Steel fiber
Polypropylene fiber
Basalt fiber
Mechanical properties
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Created: Thu, 23 Mar 2017, 11:33:32 EST by Adam Rivett
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