The Performance of Conventional and Polymer Modified Bituminous Mixture Containing Different Types of Sand as Fine Aggregate
Roads are the heart of any nation's economic and social integration but due to different distresses on it like fatigue and rutting, a number of research have been carried out on modifying the bituminous mixtures to bring real benefits to highway performance in terms of better and longer last...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://utpedia.utp.edu.my/9169/1/2009%20-%20The%20Performance%20of%20Conventional%20and%20Polymer%20Modified%20Bituminous%20Mixture%20COntaining%20Differe.pdf http://utpedia.utp.edu.my/9169/ |
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| Summary: | Roads are the heart of any nation's economic and social integration but due to different
distresses on it like fatigue and rutting, a number of research have been carried out on
modifying the bituminous mixtures to bring real benefits to highway performance in
terms of better and longer lasting roads and savings in vehicle operating cost (VOC).
Material properties play an important role in determining the final characteristics of the
mixture and its performance. This study looks at the incorporation of different types of
fine aggregate into bituminous mixtures to predict the performance of the bituminous
mixture that related to fatigue and rutting, where both conventional bitumen penetration
50/60 and 80/100, andpolymer modified bitumen PM1_82 andPM1_76 andPM2_82 and
PM2_76 were used. PM1 is consisting of styrene butadiene styrene (SBS), while PM2 is
consist of one of the plastomers polymer. Physical, chemical and mechanical tests were
performed onthe different types of sand to determine their effect when incorporated with
a bituminous mixture. A series of extensive laboratory test programs were carried out.
The tests conducted include; the Marshall Test, the creep test, wheel tracking test and
beam fatigue test. Results from the Marshall Test showed that fine aggregate
characteristics influence the optimum bitumen contents, workability and other
engineering properties such as stability, density and stiffness. The results of the
performance tests indicated that the resistances of the mixtures with quarry sand against
rutting and fatigue damage were superior to those of the other sand mixtures. This was
followed by mixture containing river, mining and marine sand respectively. This may be
due to the physical, chemical and mechanical properties of the sand, as quarry sand
exhibited greater angularity, rougher and it has bigger particles and higher shear strength
and higher content of alumina (A1203) and hematite (Fe203). Polymer modified bitumen
mixtures reveal more resistance to rutting and fatigue than the conventional mixtures.
Polymer modified mixtures PM1 was found to offer the highest resistance in rutting
followed by the polymer modified mixtures PM2, 50/60 and 80/100 penetration bitumen
mixtures respectively. While in fatigue resistance polymer modified mixtures PM1 also
exhibit the best fatigue performance followed by PM2, 80/100 and 50/60 penetration
bitumen mixtures respectively. This may be due to the PMB having better viscosity
property thanthat of the conventional binder.
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