Triaxial compression tests on bedding mortar samples looking at confinement effect analysis

摘要

This paper presents an analysis of the mechanical behavior of bedding mortar samples undertriaxial compression tests. When masonry is subjected to vertical loads, mechanicalinteractions between blocks and bedding mortar at the joints induce lateral tension andcompression stresses. Thus, the mortar layer is submitted to a triaxial stress state thatmodifies its mechanical properties and behavior under confinement effects. Thisphenomenon may affect the failure mode of masonry and almost no information about thissubject is found in literature. Here, test procedures are detailed and results are discussed. Inaddition to the compressive strength test results, also elastic modulus and Poisson ratiovalues are addressed. Significant differences were observed among triaxial and uniaxialstandard test results. The obtained mortar behavior under different levels of lateral pressureis compared with test results done by other researchers in order to produce relevantconclusions for different mortar compositions.