ABSTRACT
A set of tests was accomplished in order to get better insight into the basic mechanical properties of masonry made of normal solid clay bricks and different type of mortars. The basic mortars were lime mortar, lime-cement mortar and cement mortar. For the study of grade effect differently graded sand was used in mortars. Polypropylene fibres, glass fibre meshes and several types of cement additives modified the basic mortars. Three types of tests were performed. Masonry wallettes were tested both in compression and diagonally in tension. Horizontal mortar joints were tested by bond wrench test. A significant influence of sand grade on bond strength was observed. It was found that the most effective way to increase shear strength is to add glass fibre mesh to mortar joints made of fine graded sand. 1. INTRODUCTION
The development of structural masonry is strongly supported by efficient computational models that enable better understanding of masonry behaviour. However, the essential part of the development is experimental studies of masonry. They are especially needed when new or modified materials are introduced. There are many demands generated from practice for the improvement and development of diverse masonry. Some of them tend towards the development of mortar that would enable easy recycling of bricks. Others tend towards the improved quality of brick to mortar bond and increased shear and tensile strength as well as ductility of masonry. The decision on the masonry type should be governed by the expected loading in the life cycle of the structure. A special attention should be paid to earthquake loading.
