Abstract
Static-cyclic shear load tests and tensile tests on retrofitted masonry walls were conducted at UAS Fribourg for an evaluation of the newly developed retrofitting system, the S&P ARMO-System. This retrofitting system consists of a composite of carbon mesh embedded in a specially adapted high quality spray mortar. It can be applied with established construction techniques using traditional construction materials. The experimental study has shown that masonry walls reinforced by this retrofitting system reach a similar strength and a higher ductility than retrofits by means of bonded carbon fiber reinforced polymer sheets. Hence, the retrofitting system using carbon fiber meshes embedded in a high quality mortar constitutes a good option for static or seismic retrofits or reinforcements for masonry walls. However, the experimental studies also revealed that the mechanical anchorage of carbon mesh may be delicate depending on its design.
Highlights
In the Swiss norm series of 2003 [1], the required level of safety was adjusted to the Eurocode 8 and the seismic risk zones were adjusted to newer seismologic knowledge [2]
This paper presents an experimental study of a newly developed retrofitting system
The studied retrofitting system consists of a coated carbon mesh, which is embedded in specially adapted high quality spray mortar, the ARMO-crete w, a one-component product based on inorganic binders, fibers, selected aggregates, and polymer
Summary
In the Swiss norm series of 2003 [1], the required level of safety was adjusted to the Eurocode 8 and the seismic risk zones were adjusted to newer seismologic knowledge [2]. If the seismic safety cannot be guaranteed, retrofitting existing masonry structures by means of composite materials, such as fiber reinforced polymers (FRP) may be a solution. A retrofit of masonry walls using FRP can be performed quickly and without deep intervention in the load carrying structure of the building. Theoretical studies and experimental campaigns at UAS Fribourg have mainly focused on the use of high performance fibers (carbon, glass, aramid) in different applications. ARMO-System) using carbon fiber meshes embedded in a high quality mortar. This system can be applied with established construction techniques using traditional construction materials. Series MT-A, the mechanical anchorage of carbon mesh embedded in different types of mortar was evaluated with tensile tests. The tensile tests in Series MT-A, Series AT-F, and Series AT-G were performed on masonry elements, which represent a tensile pier of a retrofitted masonry wall
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
