Penetration Test Of Bitumen Lab Report Politeknik
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Abstract:Tire-based skid resistance tests are recognized as the most reliable method for predicting the performance of pavements in service. One of the most widely used methods for tire-based skid resistance tests is the United States Department of Transportation (USDOT) 3-pitch tire-based test. One major weakness of this test is the creation of a man-made skid pattern that is not representative of the actual service condition. An international program on road skid control (ICC-IGS) has been established to create a standardized skid resistance test that would be more representative of the service condition. In this study, 2 tests, based on the established ICC-IGS (ISO 5103) and the USDOT 3-pitch tire-based skid resistance test, were conducted on 4 different aggregate-based pavement types in order to determine the skid resistance of the various pavement types. The standardized 3-pitch tire-based skid resistance test was the only test that showed a good correlation (R2 = 0.89) with the ICC-IGS test. In addition, the USDOT 3-pitch tire-based skid resistance test was shown to be better than the ICC-IGS for predicting the performance of the various pavement types. Based on the results of this study, it was concluded that it is more beneficial to use the standardized 3-pitch tire-based skid resistance test for predicting the skid resistance of pavements in service rather than using the multi-pitch ICC-IGS test.
Abstract:The introduction of significant climatic changes over the past few decades has resulted in an increase of the total annual rainfall in the peri-urban areas of northern Australia. Hence, the objective of this study was to develop a predictive model for rain-induced erosion in the Peel region of northern Australia. The model was developed using a dataset of data obtained from four topographic measurements and a programed rainfall intensity of six different intensities over a period of 10 years. Topographic measurements of the dry and wet seasons were obtained from the site. The model was tested using a dataset of data obtained from the wet season from 2001 to 2010.
Abstract:This paper investigates the applicability of biochar derived from the hydrothermal carbonization of spent wastewater treatment sludge (WW-SCB) in the removal of Cu(II) and Cr(VI) ions from contaminated soil. The effect of biochar application on soil physicochemical properties, sorption characteristics and bioremediation efficiency of Cu(II) and Cr(VI) ions was studied. The results showed that after the addition of WW-SCB biochar, electrical conductivity, which indicated the loss of ion through leaching, decreased. The pH of soil was also increased by the biochar due to the high pH of WW-SCB biochar. The results of soil tests indicated that the addition of the biochar improved the stability of soil aggregate and reduced the cohesion and plasticity of soil. The biosorption capacity of Cu(II) and Cr(VI) ions increased linearly with an increasing concentration of biochar added to contaminated soil. The addition of biochar to contaminated soil decreased the mobility of Cu(II) and Cr(VI) by improving soil adsorption. After 5 months, the removal efficiency of Cu(II) and Cr(VI) ions from contaminated soil reached 90% and 85%, respectively. The results indicate that the addition of WW-SCB biochar to contaminated soil can be used as a useful alternative to conventional pollutants remediation techniques. 827ec27edc