ព្រឹត្តិបត្រស្រាវជ្រាវ (Research Articles)

Title
Experimental Investigation on the Behaviour of Reinforced Concrete Slabs Strengthened with Ultra-high Performance Concrete
Author(s)Hor Yin, Wee Teo, Kazutaka Shirai
Status 107 views, 0 downloads Download
Keywords   Composite UHPC-concrete slabs;     Ductility     Rehabilitation;     Shear capacity;     Structural behaviour;     UHPC overlay;  
Abstract

Nine rectangular specimens were tested to investigate the behaviour of composite reinforced concrete (RC) slabs strengthened with ultra-high performance concrete (UHPC). The specimens were two series with various UHPC strengthening configurations. The first, a rehabilitation series, tested UHPC as patch material for repairing deteriorated concrete structures. The second, a UHPC overlay series, was used to retrofit soffits of RC members. The results showed that using the rehabilitation series, the UHPC reduced diagonal cracking and developed more flexural cracks as compared to RC slabs with no UHPC strengthening. The UHPC exhibited excellent energy absorption with extensive deflection hardening and ductility during the post cracking range. In the UHPC overlay series, each slab showed diagonal shear cracks and debonding modes. The UHPC overlay delayed the development of shear cracking. As the overlay thickness increased, the ultimate load increased; but the tendency for the UHPC to undergo fracture failure also increased.

JournalConstruction and Building Materials
Publisher/InstitutionElsevier
Field/FacultyFaculty of Engineering
Publication Year2017
Volumn155
Issue-
Pages463-474
DOIhttps://doi.org/10.1016/j.conbuildmat.2017.08.077
Recommended CitationHor Yin, Wee Teo, Kazutaka Shirai. (2017). Experimental Investigation on the Behaviour of Reinforced Concrete Slabs Strengthened with Ultra-high Performance Concrete. Construction and Building Materials, 155, 463-474
Contact Emailyin_hor@yahoo.com