Tensile Behaviors Of Highly Flowable Strain
Hardening Fiber Reinforced Concrete
Author(s)
W. C. Liao
Abstract
Highly flowable strain hardening fiber reinforced concrete (HF-SHFRC)
combines the excellent workability of self-consolidating concrete (SCC) in the
fresh state, with the strain-hardening and multiple cracking characteristics of
high performance fiber reinforced cementitious composites (HPFRCC) in their
hardened state. This paper presents six HF-SHFRC mix designs, with
compressive strengths ranging from 35 to 66 MPa. The results of two tensile
tests, direct tensile test (dog-bone shaped specimen) and long prismatic tensile
test with continuous reinforcement, are also carried out in this paper. All the
mixtures show quite satisfactory in flowability and tensile properties, including
strain-hardening and enhanced strain capacity due to the presence of the
reinforcing steel strand.
Keywords: strain hardening, SCC, HPFRCC, multiple cracking.
1 Introduction
Highly flowable strain hardening fiber reinforced concrete (HF-SHFRC)
combine the self-consolidating property of self-consolidating concrete (SCC) in
their fresh state, with the strain-hardening and multiple cracking characteristics
of high performance fiber reinforced cement composites (HPFRCC) in their
hardened state. SCC has a high flowability and a moderate viscosity, and has no
blocking by the reinforcement during flow. With proper use of superplasticizer
(SP) and viscosity modifying agents (VMA), SCC can achieve higher flowability
and higher slump without segregation, and also maintain better slump retention,
thus making concrete more durable due to its lower water/cementitious ratio, and
reducing sulfate attack and salt penetration.
Keywords
strain hardening, SCC, HPFRCC, multiple cracking.
Related Book
Other papers in this volume
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