https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:45223 −2MPa/s to 10⁰ MPa/s. The results show that the rate effects are clear for these test methods, and the tensile strength of sandstone will increase linearly with the logarithm of the loading rate. At the same loading rate, it is found that the tensile strengths of the sandstone specimens under plate loading and arc loading are relatively similar and are much greater than the direct tensile strength, while the tensile strength under strip loading is less than the direct strength. A comprehensive comparison suggested that the strip loading method can be adopted for the Brazilian disc test, while the obtained strength should be modified with a coefficient of 1.37 to obtain the direct tensile strength.]]> Wed 26 Oct 2022 19:40:06 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34866 50. The size of the representative elementary volume (REV) of cracked CCL decreases linearly with the increase in soil LL when LL < 50. The linear fitting result is REV = 90.5 – 1.6 LL, whereas REV change is inconspicuous with a mean value of approximately 10 cm when LL > 50. The sample size of the CCLs for the permeability test must be larger than REV. Before and after three dry-wet cycles, the permeability ratio (K₃/k₀) initially increases and eventually decreases as soil LL increases, and LL at the peak value of K₃/k₀ is 36.1%. However, linear relationships exist between permeability D-value (K₃ − k₀) and soil LL in a semilog coordinate system when LL < 50%, whereas the change in the permeability D-value is inconspicuous with a mean value of approximately 1.67 × 10⁻⁸ cm/s when LL > 50%. The volume and mean width of unclosed cracks are two main factors that determine the increase in permeability after dry-wet cycles. After three dry-wet cycles, these factors decrease as soil LL increases, thereby reducing the permeability D-value.]]> Tue 03 Sep 2019 18:02:06 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39806 Fri 24 Jun 2022 08:25:02 AEST ]]>