%0 Journal Article
%T Sprayed strain
%A Gideon PAG van Zijl
%A Leon de Beer
%J Advances in Structural Engineering
%@ 2048-4011
%D 2019
%R 10.1177/1369433218807686
%X Strengthening of unreinforced masonry walls is realised by a bonded overlay of strain-hardening cement-based composite. In-plane shearing resistance is considered here, although out-of-plane resistance is also increased by the overlay. The strain-hardening cement-based composite mix is adjusted for sprayed application with low run-off and waste. Characterization of masonry joint shear-slip behaviour, interfacial response between the masonry substrate and the strain-hardening cement-based composite overlay and multiple cracking tensile response of the sprayed strain-hardening cement-based composite bond is described. Preferred failure of the composite by multiple cracking shearing in the strain-hardening cement-based composite overlay is achieved through structural mechanics¨Cbased design of the overlay. Drying shrinkage development and cracking due to restraint by the masonry substrate are reported. Finally, shear wall response is reported for single- and double-leaf masonry walls with a bonded strain-hardening cement-based composite overlay on one face only and compared with single- and double-leaf control masonry walls without overlays. An overlay of thickness similar to that of typical plaster rendering is shown to lead to significantly enhanced shearing response
%K bonded overlay
%K masonry
%K strain-hardening cement-based composite
%K shear resistance
%K shotcrete
%U https://journals.sagepub.com/doi/full/10.1177/1369433218807686