Determining the void ratio in Hot-Mix asphalt pavements using different methods according to EN 12697

Other Title(s)

تحديد نسبة الفراغات في الرصفات الإسفلتية الساخنة باستخدام طرق مختلفة حسب الكود الأوروبي 12697

Dissertant

Shumar, Thair Muhammad Hasan

Thesis advisor

Jundiyah, Shafiq Masud

University

Islamic University

Faculty

Faculty of Engineering

Department

Department of Civil Engineering

University Country

Palestine (Gaza Strip)

Degree

Master

Degree Date

2018

English Abstract

Inaccurate air void ratio based on erroneous bulk density can seriously affect the performance of the roadway and its quality.

Therefore, several methods were improved to measure bulk density by using different techniques in the developed countries, while the Saturated Surface Dry (SSD) traditional method has been used in Gaza strip as the only method till now.

This study aims at providing a better understanding of the effect of the selected bulk density measurement method on the percentage of voids using four methods namely; Dimensional Method, Dry Method, Surface-Saturated Dry Method, and Paraffin Sealing Method.

At Laboratory, sixtynine specimens were prepared, thirty three of them were prepared in the Marshal Design System in order to determine the optimum bitumen content of the three different mix types, and thirty-six of the specimens were taken from mixtures design in order to determine bulk density.

In the first mix, the dense asphalt contains 1/2" maximum size limestone aggregate with 5.4% asphalt content.

In the second mix, the mastic asphalt contains 3/8" maximum size limestone aggregate with 12.5 % asphalt content.

In the third mix, the porous asphalt contains 3/4" maximum size limestone aggregate with 4.2% asphalt content.

Laboratory results showed that the SSD method is the best choice for measuring bulk density in dense and mastic mixtures.

In addition, there are no differences between SSD and dry methods in mastic mix.

The regression analysis demonstrated that there is no correlation among the four methods in porous asphalt.

Also, the results showed that the dimensional method is the only method suitable for the determination of bulk density (Gmb) in porous mix despite it always gives underestimated results for Gmb in all asphalt mixes.

As a result, the dimensional method can be used as an indicator for the upper limit of voids, while the dry method can be used as an indicator to the lowest limit, regardless the type of mix.

Moreover, the study showed that the paraffin sealing method is unsuitable for measuring Gmb because of wide ranged variations and illogical value of voids.

The study recommended to use new techniques to determine Gmb in open graded mixtures with more accurate methods rather than traditional ones.

Main Subjects

Road Engineering

Topics

No. of Pages

122

Table of Contents

Table of contents.

Abstract.

Abstract in Arabic.

Chapter One : Introduction.

Chapter Two : Literature review.

Chapter Three : Material and testing program.

Chapter Four : Results and data analysis.

Chapter Five : Conclusions and recommendations.

References.

American Psychological Association (APA)

Shumar, Thair Muhammad Hasan. (2018). Determining the void ratio in Hot-Mix asphalt pavements using different methods according to EN 12697. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-904984

Modern Language Association (MLA)

Shumar, Thair Muhammad Hasan. Determining the void ratio in Hot-Mix asphalt pavements using different methods according to EN 12697. (Master's theses Theses and Dissertations Master). Islamic University. (2018).
https://search.emarefa.net/detail/BIM-904984

American Medical Association (AMA)

Shumar, Thair Muhammad Hasan. (2018). Determining the void ratio in Hot-Mix asphalt pavements using different methods according to EN 12697. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-904984

Language

English

Data Type

Arab Theses

Record ID

BIM-904984