A comparison of the fracture properties of conventional and polymer-modified two-layer asphalt concrete overlay systems /
(Styrelf) were used to study their fracture toughness. With
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (Styrelf) were used to study their fracture toughness. With are added to the neat asphalt to improve the fracture asphalt concrete overlays has increased the need to find new better characterization of fracture toughness. Crack speed determined from laboratory experiments conducted on TTI different asphalt concrete mixtures with and without polymer different layers with asphalt rich sand anti-fracture (SAF) effectively. It is for this reason that polymers (Styrelo found to be linear when combined with constant (S). Results four different binders and different combinations of fracture material constants log(A) and (n) is not linear. A fracture toughness. Each overlay was made up of two healing of the asphalt concrete or the plasticity effects due materials which could resist cracking or fracture more mixture as the bottom layer. Fracture mechanics concepts were mixtures, 18 different overlay systems were tested for their modified asphalt concrete with the corresponding conventional neat asphalt concrete. Rate of crack growth is correlated new fracture material constant (S) relating to crack speed overlay tester. Analysis of the experimental results showed resisting properties of asphalt concrete. In this study three showed that this new material constant (S) could lead to a that crack growth rate and J*-integral are correlated. In that this new material constant (S) could be related to the observed experimental fatigue life. It is speculated The problem of reflection cracking through the conventional this study it was observed that the relation between the to unloading of the sample in overlay test. used to compare the fracture properties of polymer (Styrelo was developed. The relationship between log(A) and (n) was when calculated using (S) has shown better correlation with with the energy line J*-integral. Crack growth rates were |
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| Item Description: | "Major subject: Civil Engineering". Vita. |
| Physical Description: | xv, 116 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: page 66. |