The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Qifeng Dong - One of the best experts on this subject based on the ideXlab platform.

  • characterization of Moisture Vapor diffusion in fine aggregate mixtures using fickian and non fickian models
    Materials & Design, 2017
    Co-Authors: Huining Xu, Jing Zhou, Qifeng Dong
    Abstract:

    Abstract Moisture Vapor diffusion resulting from the difference in relative humidity between air and pavement material contributes to Moisture damage. Understanding Moisture Vapor diffusion in asphalt pavement is the first task in the analysis of Moisture damage. Analysis was conducted in an automated environmental chamber with a temperature precision of ± 0.5 °C and relative humidity precision of ± 3%. Moisture uptake profiles for fine aggregate mixtures (FAMs) under various environmental conditions (relative humidity and ambient air temperature) and constituent materials (aggregate and asphalt binder) were measured. Preliminary data analysis showed the existence of Non-Fickian diffusion behavior. Therefore, two non-Fickian and one Fickian models were introduced to fit the measured Moisture uptake data and determine FAM diffusion characteristics, such as diffusion coefficient, diffused Moisture phase, and time-variable diffusion. Based on the variation in FAM diffusion characteristics under various experimental conditions and constituent material combinations, sensitivity analysis was conducted with one-way ANOVA and the determinants of FAM Vapor diffusion characteristics were proposed.

Huining Xu - One of the best experts on this subject based on the ideXlab platform.

  • characterization of Moisture Vapor diffusion in fine aggregate mixtures using fickian and non fickian models
    Materials & Design, 2017
    Co-Authors: Huining Xu, Jing Zhou, Qifeng Dong
    Abstract:

    Abstract Moisture Vapor diffusion resulting from the difference in relative humidity between air and pavement material contributes to Moisture damage. Understanding Moisture Vapor diffusion in asphalt pavement is the first task in the analysis of Moisture damage. Analysis was conducted in an automated environmental chamber with a temperature precision of ± 0.5 °C and relative humidity precision of ± 3%. Moisture uptake profiles for fine aggregate mixtures (FAMs) under various environmental conditions (relative humidity and ambient air temperature) and constituent materials (aggregate and asphalt binder) were measured. Preliminary data analysis showed the existence of Non-Fickian diffusion behavior. Therefore, two non-Fickian and one Fickian models were introduced to fit the measured Moisture uptake data and determine FAM diffusion characteristics, such as diffusion coefficient, diffused Moisture phase, and time-variable diffusion. Based on the variation in FAM diffusion characteristics under various experimental conditions and constituent material combinations, sensitivity analysis was conducted with one-way ANOVA and the determinants of FAM Vapor diffusion characteristics were proposed.

Xinfeng Wang - One of the best experts on this subject based on the ideXlab platform.

  • study on blends of thermoplastic polyurethane and aliphatic polyester morphology rheology and properties as Moisture Vapor permeable films
    Polymer Testing, 2005
    Co-Authors: Xiaodong Wang, Xinfeng Wang
    Abstract:

    Blends of Estane® thermoplastic polyurethane (TPU) and aliphatic polyester were prepared via melt blending and blend films were prepared via blow molding. The morphology, thermal properties and rheology of the blends, and the properties as Moisture Vapor permeable films were studied. Differential scanning calorimetry and Fourier transformed infrared spectroscopy investigation indicated that the TPU was compatible with the aliphatic polyester. Scanning electron microscopy (SEM) micrographs exhibited a particle-dispersed type of the morphology, in which the aliphatic polyester was finely dispersed as regular spherical particles in the TPU matrix when the content of the aliphatic polyester was below 30 wt%; however, the dispersed domain presented an irregular form owing to aggregation when the content of the aliphatic polyester reached 40 wt%. Evaluation of the properties of the blend films demonstrated that incorporation of the aliphatic polyester could significantly enhance the adhesive strength and the tensile properties of the TPU film, but the Moisture Vapor permeability and the waterproofness deteriorated. The blend films will still have a balance of comfort and laminating processability as long as the aliphatic polyester content is controlled to an appropriate level, i.e. below 20 wt%.

Xiaoli Zhang - One of the best experts on this subject based on the ideXlab platform.

Jing Zhou - One of the best experts on this subject based on the ideXlab platform.

  • characterization of Moisture Vapor diffusion in fine aggregate mixtures using fickian and non fickian models
    Materials & Design, 2017
    Co-Authors: Huining Xu, Jing Zhou, Qifeng Dong
    Abstract:

    Abstract Moisture Vapor diffusion resulting from the difference in relative humidity between air and pavement material contributes to Moisture damage. Understanding Moisture Vapor diffusion in asphalt pavement is the first task in the analysis of Moisture damage. Analysis was conducted in an automated environmental chamber with a temperature precision of ± 0.5 °C and relative humidity precision of ± 3%. Moisture uptake profiles for fine aggregate mixtures (FAMs) under various environmental conditions (relative humidity and ambient air temperature) and constituent materials (aggregate and asphalt binder) were measured. Preliminary data analysis showed the existence of Non-Fickian diffusion behavior. Therefore, two non-Fickian and one Fickian models were introduced to fit the measured Moisture uptake data and determine FAM diffusion characteristics, such as diffusion coefficient, diffused Moisture phase, and time-variable diffusion. Based on the variation in FAM diffusion characteristics under various experimental conditions and constituent material combinations, sensitivity analysis was conducted with one-way ANOVA and the determinants of FAM Vapor diffusion characteristics were proposed.