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Title: Multi-Scale Abridged Cement Composite with Enhanced Mechanical Properties

Author(s): B. S. Sindu and Saptarshi Sasmal

Publication: Materials Journal

Volume: 117

Issue: 4

Appears on pages(s): 105-117

Keywords: continuous fibers; digital image correlation; high ductility; high strength; hybrid fibers; length scales

Date: 7/1/2020

Abstract:
To develop cementitious composites with improved properties, engineering has to be judiciously done at different scales. In this study, a multi-scale engineered cementitious composite (MS-ECC) with high tensile strength and strain-hardening properties is developed by incorporating nano-, micro-, and macro- (in the form of continuous fibers) fibers into it. At first, a cementitious composite is developed by individually incorporating nano- and microfibers to understand the influence of each type of fiber and to arrive at the optimum dosage level. Digital image correlation information is employed to investigate the crack properties and fracture process in the developed composite with individual scale fibers. Next, a hybrid cementitious composite, developed by incorporating nano- and microfibers, is found to demonstrate an improvement in the strength and strain hardening properties. Further improvement in higher scale is carried out by incorporating continuous fibers into it to develop MS-ECC which exhibited tensile strength of 23 MPa (3.63 ksi) and strain capacity more than 8000 micron.




  

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