19 research outputs found
The global burden of cancer attributable to risk factors, 2010-19: a systematic analysis for the Global Burden of Disease Study 2019
Bond of deformed bars in plain and fibre reinforced concrete under reversed cyclic loading
In Vitro Activity of Essential Oils Against Gram-Positive and Gram-Negative Clinical Isolates, Including Carbapenem-Resistant Enterobacteriaceae
Copolymerization of cyclohexene-3-yl methyl methacrylate with styrene: synthesis, characterization, monomer reactivity ratios, and thermal properties
Controlled drug release using ascorbate-responsive quercetin-conjugated alginate hydrogels
Laboratory evaluation of transgenic Populus davidiana×Populus bolleana expressing Cry1Ac + SCK, Cry1Ah3, and Cry9Aa3 genes against gypsy moth and fall webworm
Rheology, fiber dispersion, and robust properties of Engineered Cementitious Composites
The capability of processing robust Engineered Cementitious Composites (ECC) materials with consistent mechanical properties is crucial for gaining acceptance of this new construction material in various structural applications. ECC's tensile strain-hardening behavior and magnitude of tensile strain capacity are closely associated with fiber dispersion uniformity, which determines the fiber bridging strength, complementary energy, critical flaw size and degree of multiple-crack saturation. This study investigates the correlation between the rheological parameters of ECC mortar before adding PVA fibers, dispersion of PVA fibers, and ECC composite tensile properties. The correlation between Marsh cone flow rate and plastic viscosity was established for ECC mortar, justifying the use of the Marsh cone as a simple rheology measurement and control method before fibers are added. An optimal range of Marsh cone flow rate was found that led to improved fiber dispersion uniformity and more consistent tensile strain capacity in the composite. When coupled with the micromechanics based ingredient-tailoring methodology, this rheological control approach serves as an effective ECC fresh property design guide for achieving robust ECC composite hardening properties.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/94214/1/Mo-Rheology-2012.pd