Abstract
Statistical modeling is utilized effectively to development relation/s between the dependent variables and independent variables. In other words, it describes how one or more random variables are related to one more other variables. Building verified models can help in predicting performance characteristics, and saving time and money. This study aims to present a statistical models which help to understand the significance of the different parameters in characterizing the performance of the Thin Asphalt Overlay (TAO). The experimental program included: design the thin asphalt overlay mixtures using one gradation type (9.5 Nominal Maximum Aggregate Size NMAS), three filler types (conventional mineral filler, Ordinary Portland Cement, and Quick lime), and five percentages of asphalt content to identify the optimum asphalt content. Then, Styrene Butadiene Styrene (SBS) modified polymer binder was introduced for performance enhancement. Performance tests were used to evaluate TAO mixture in term of some main namely, volumetric, mechanical, and durability properties are (bulk density, indirect tensile strength and tensile strength ratio). Statistical Product and Service Solutions (SPSS) software (Version 24) was used as a tool for models building. To find the most accurate statistical models, linear and nonlinear regression was achieved. This study demonstrates that the using statistical modeling is achievable and offer a vital tool to describe the characteristics and performance of the TAO mixture in term volumetric, mechanical and durability properties.
Highlights
Thin asphalt overlay (TAO) is a bituminous surface treatment layer that apply to enhances the current properties of pavement structure as far as it is strengthening pavement and eliminating the deformability [1]
The overall aim of this study is to develop a predictive equations correlate the depended variable with independent variable where selected from mechanical, volumetric and durability properties act as depended variables, whereas filler types like conventional mineral filler, ordinary Portland cement, quicklime and percent of Styrene Butadiene Styrene (SBS) represent as independent variables
SBS modified polymer binder was introduced for performance enhancement
Summary
Thin asphalt overlay (TAO) is a bituminous surface treatment layer that apply to enhances the current properties of pavement structure as far as it is strengthening pavement and eliminating the deformability [1]. TAO is generally the highest level of preventive maintenance treatment, which can perform on asphaltsurfaced pavements. TAO is provided a new pavement surface for a fraction costly rebuilding roadway, but it is the only preventive maintenance technique that simultaneously improves the structural value and extends the pavement's service life. This technique has been performed by many transportation agencies with varying success
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