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INTERFACIAL BOND TAILORING FOR CRACK WIDTH REDUCTION IN HIGH STRENGTH-HIGH DUCTILITY CONCRETE (HSHDC)



Author(s): R. Ranade and V.C. Li
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 359-366
Total Pages: 8
Language: English


Abstract: The efficacy of tailoring the fiber/matrix interfacial bond, through cold plasma treatment of the fibers, to reduce the crack width and potentially enhance the tensile properties (without significantly altering the compressive properties) of High Strength-High Ductility Concrete (HSHDC) is evaluated in this study. HSHDC consistently achieves compressive strength greater than 150 MPa (similar to Ultra-high Performance Concretes [UHPC]) and yet possesses the same tensile ductility as Engineered Cementitious Composites (ECC). In this study, while the micro-scale single fiber pullout tests are used to determine the fiber/matrix interfacial bonds achieved for various plasma treatment protocols (varying the gas type and treatment time), direct uniaxial tension and compression tests are used at the macro-scale to determine the corresponding composite properties of HSHDC. Results indicate that the plasma treatment of the polyethylene fibers in HSHDC achieves the objective of crack width reduction to some extent; however, heat curing and non-uniform plasma coating of the bundled fibers tend to degrade the composite tensile performance.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00