Materials Research and Development is an international, peer-reviewed open access journal dedicated to advancing research the field of materials science and engineering. The journal provides a rapid publication process to ensure wide dissemination of high-quality articles to scientists, professionals, and interested individuals worldwide. Our goal is to serve as an efficient, reliable, and trusted platform for scholars and readers, publishing cutting-edge research in the field.
Abstract: Permeable asphalt road surfaces have gained prominence in China's green road initiatives, finding widespread application. To investigate the extent of water-induced deterioration of permeable asphalt mixtures under high-temperature rainfall coupled conditions, this study employed Hamburg Wheel Tracking (HWT) tests. Six environmental conditions were established, encompassing dry, saturated, and submerged states at temperatures of 50°C and 60°C, denoted as Conditions 1 (50°C, dry), 2 (50°C, saturated), 3 (50°C, submerged), 4 (60°C, dry), 5 (60°C, saturated), and 6 (60°C, submerged). Various performance indicators, including rut depth, rut deformation rate, creep rate, and stripping inflection point, were measured to evaluate the water damage resistance of permeable asphalt mixtures under different environmental conditions. The results revealed a significant decrease in all assessed indicators under high-temperature rainfall coupled conditions, suggesting a substantial reduction in water damage resistance. Notably, under dry, saturated, and submerged conditions at 60°C, the maximum rut depths were 1.95, 2.54, and 2.60 times those observed at 50°C, respectively. The rut depths exhibited a ratio of 1:1.2:2.2:1.9:3.1:5.8 for the conditions of 50°C dry, 50°C saturated, 50°C submerged, 60°C dry, 60°C saturated, and 60°C submerged. The rut deformation rate ratios followed a pattern of 1:1.2:2.2:1.9:3.1:7.2, while the creep rate ratios were 2.4:2.2:1.2:1.3:1.1:1, and the stripping inflection point ratios were 2.5:2.25:1.25:1.75:1.25:1 for the same conditions. This study underscores the significant influence of high-temperature rainfall coupling on the water damage resistance of permeable asphalt mixtures. The research outcomes, validated through Hamburg Wheel Tracking tests, provide theoretical foundations and technical support for the development and application of green road systems.Abstract: Permeable asphalt road surfaces have gained prominence in China's green road initiatives, finding widespread application. To investigate the extent of water-induced deterioration of permeable asphalt mixtures under high-temperature rainfall coupled conditions, this study employed Hamburg Wheel Tracking (HWT) tests. Six environmental conditions were...Learn More
Abstract: The main components of lime are CaO and MgO, in the production and transportation process, it is easy to absorb H2O and CO2 in the air, affecting the quality of lime, in the traditional detection method, CaO and MgO use EDTA titration method, the method in the detection process, it is inevitable to avoid the impact of CO2 in water on the results, in practical application, different laboratory detection nodes Results often vary greatly. In this experiment, the limestone standard sample was selected and burned it at 1000°C to obtain the quicklime standard sample. Li2B4O7 was used as the flux, and the molten glass sheet method was employed. The sample to flux ratio was 1:10, and 0.2 mL of 300 g/L NH4I solution was added as the release agent. The calibration sample was accomplished by melting at 1000°C for 10 min. In X-ray fluorescence spectrometer, spectral line interference was eliminated by spectral line correction, and matrix correction was carried out according to the empirical coefficient method to correct the effect of calcination in the sample on the results. A composition analysis method for CaO, MgO, SiO2, Al2O3, Fe2O3, TiO2, K2O, and Na2O in quicklime was established. Through the verification of the precision and accuracy of the method, it was proved that the results of the method could meet the needs of daily production quality monitoring. Through the method verification, the relative standard deviation of the detection results of different elements of the method is between 0.02%-4.11%. By comparing the certified standard samples with different methods, the result error is within the allowable range, which proves that the results of the method can meet the needs of daily production quality control.Abstract: The main components of lime are CaO and MgO, in the production and transportation process, it is easy to absorb H2O and CO2 in the air, affecting the quality of lime, in the traditional detection method, CaO and MgO use EDTA titration method, the method in the detection process, it is inevitable to avoid the impact of CO2 in water on the results, i...Learn More
