Characterisation of the tensile performance of bonding agents for the restoration of heritage dimension stone from southeast Australia

Through this research, we measure the direct tensile strength of three important southeast Australian heritage dimension stones and compare results with published values. The are Sydney Sandstone, Victorian Bluestone South Black Granite. This information is crucial for stone masons when they selecting cutting construction projects, as need to ensure that use repair will be strong enough withstand loads stresses it subjected in its final location. Results show methods testing provide strengths 30–63% indirect methods. When tension compressive ratio considered, 2–7% calculated these stones. significantly less than typically assumed 10% intact rock. Three masonry bonding agents have been selected determine their capacity re-bond stone. Highly variable were achieved, re-bonded ranging from 6% 104% strength. variability most likely related heterogeneity surface preparations. Based on outcomes, recommended carefully consider product used restoration works test samples prepared confirm capacities.