Publications

Pro079

Evolution of shear stiffness and electrical resistance in cement based materials



Title: Evolution of shear stiffness and electrical resistance in cement based materials
Author(s): Tae Sup Yun, Woong Been Son, Young Jin Kim, Yun Mook Lim
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 371 - 376
Total Pages: 6
Nb references: 5
Language: English


Abstract: The timely de-molding of concrete structure casting not only secures the required strength of materials but also economizes the schedules of construction process at in-situ. Yet, the current engineering practice often adapts the empirical criteria, in particular, for the large concrete structures. So, the soundness and evolutionary strength of concrete structures necessitate the accurate evaluation of degree of hardening with time. The hardening of cementitous material involves continuous chemical reaction of water with cements and partial evaporation of water phase. The status of materials changes to quasi- to semi-solid condition.
The non-destructive methods are implemented in this study to investigate the evolution of small-strain shear stiffness and electrical conductivity of concrete, which in turn hints the ongoing process of hardening with time. The instrumented cell equipped with the bender element and two electrodes system houses the mortar and concrete, and the shear wave velocity and electrical resistance are successively measured at pre-selected time frame. The unique evolution of measured properties provides the first approximation of material status to further correlate the strength. Results gathered from the laboratory-scale experiments are discussed to upscale towards the in-situ engineering application and to propose a characterization method adaptable to the management of concrete structure casting.


Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00


>> You must be connected to view the paper. You can register for free if you are not a member