Undersökning av hur penetrationstalet i bitumen påverkar styvheten av cementstabiliserad asfalt i laboratoriepackade prover
(2022) VTVM05 20221Transport and Roads
- Abstract
- A semi-flexible pavement is a composite material consisting of an open-graded asphalt skeleton with an air void content between 25 - 35% that is filled with a cement sludge. Limited research has been done regarding factors which can affect the mechanical properties of this material. Therefore, this study explores the affect the penetration value of a bitumen has on the stiffness of a semi-flexible pavement. Furthermore, a replicable method for laboratory compaction of test specimens for the material in question is to be decided.
Hot-mix asphalt with bitumen of varying penetration grade was produced by compaction with a Marshall hammer, this resulted in an open-graded asphalt skeleton which was filled with a cement sludge. After curing... (More) - A semi-flexible pavement is a composite material consisting of an open-graded asphalt skeleton with an air void content between 25 - 35% that is filled with a cement sludge. Limited research has been done regarding factors which can affect the mechanical properties of this material. Therefore, this study explores the affect the penetration value of a bitumen has on the stiffness of a semi-flexible pavement. Furthermore, a replicable method for laboratory compaction of test specimens for the material in question is to be decided.
Hot-mix asphalt with bitumen of varying penetration grade was produced by compaction with a Marshall hammer, this resulted in an open-graded asphalt skeleton which was filled with a cement sludge. After curing 18 test specimens for 28 days, the stiffness modulus of individual specimens was tested using an indirect-tensile strength test at temperatures between 15-30℃.
The results proved statistically significant in that the penetration value of the bitumen has an effect on stiffness modulus of the test specimens. A higher penetration value resulted in a lower stiffness modulus. Furthermore, the stiffness modulus decreased with a rise in temperature. Conclusions drawn are that a decrease in the penetration value of a bitumen results in an increase in stiffness modulus in a semi-flexible pavement. Also, a method for laboratory production of the material has been developed through compaction using a Marshall hammer. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9089196
- author
- Andersson, David LU
- supervisor
- organization
- course
- VTVM05 20221
- year
- 2022
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Cementstabiliserad, Asfalt, Bitumen, Styvhet, Penetration, Styvhetsmodul, Penetrationstal
- report number
- 374
- ISSN
- 1653-1922
- language
- Swedish
- id
- 9089196
- date added to LUP
- 2022-06-22 09:36:01
- date last changed
- 2022-06-22 09:36:01
@misc{9089196,
abstract = {{A semi-flexible pavement is a composite material consisting of an open-graded asphalt skeleton with an air void content between 25 - 35% that is filled with a cement sludge. Limited research has been done regarding factors which can affect the mechanical properties of this material. Therefore, this study explores the affect the penetration value of a bitumen has on the stiffness of a semi-flexible pavement. Furthermore, a replicable method for laboratory compaction of test specimens for the material in question is to be decided.
Hot-mix asphalt with bitumen of varying penetration grade was produced by compaction with a Marshall hammer, this resulted in an open-graded asphalt skeleton which was filled with a cement sludge. After curing 18 test specimens for 28 days, the stiffness modulus of individual specimens was tested using an indirect-tensile strength test at temperatures between 15-30℃.
The results proved statistically significant in that the penetration value of the bitumen has an effect on stiffness modulus of the test specimens. A higher penetration value resulted in a lower stiffness modulus. Furthermore, the stiffness modulus decreased with a rise in temperature. Conclusions drawn are that a decrease in the penetration value of a bitumen results in an increase in stiffness modulus in a semi-flexible pavement. Also, a method for laboratory production of the material has been developed through compaction using a Marshall hammer.}},
author = {{Andersson, David}},
issn = {{1653-1922}},
language = {{swe}},
note = {{Student Paper}},
title = {{Undersökning av hur penetrationstalet i bitumen påverkar styvheten av cementstabiliserad asfalt i laboratoriepackade prover}},
year = {{2022}},
}