MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP)
The limitations of material for road construction and demand increase for aggregate and asphalt cause the high cost of construction and rehabilitation of roads so that it necessary to provide alternative materials such as recycled asphalt material and utilization of waste materials like steel slag t...
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The limitations of material for road construction and demand increase for aggregate and asphalt cause the high cost of construction and rehabilitation of roads so that it necessary to provide alternative materials such as recycled asphalt material and utilization of waste materials like steel slag to replace aggregated material. Slag aggregate which has a surface rough compared to natural aggregate, the thickness of the slag aggregate which prevents cracking by mixed internal friction, and the high adhesion between asphalt and slag have a better fatigue resistance, but it is susceptible to temperature sensitivity which is expected to overcome the shortcomings found in the RAP with rejuvenator reclamite.
This study was aimed to conduct the evaluation and performance control of asphalt mixture with reclaimed asphalt pavement (RAP) and slag materials as a substitute for the aggregate. The used material in this study was a steel slag from Cilegon, RAP material from Cikampek, aggregates from Karawang quarry, and asphalt Pertamina pen 60/70. The tests were conducted by using an empirical method based on testing with Marshall Equipment, while for mechanistic method based on resilient modulus test with UMATTA, and Fatigue testing of Beam Fatigue Apparatus using four point loading method.
The methdology of this study is divided into four stages, they are, the preliminary stage including a literature review and secondary data collection. The first processing phase is testing the material characteristic for asphalt material, aggregates, RAP and slag and design of mix asphalt which is made into sixteen mixture variations with different percentage from the RAP and slag and then be tested empirically by Marshall to get the value of the optimum asphalt content. The second phase is mechanistic performance to find value resilient modulus and fatigue resistance. The third phase is the hot mix asphalt performance mechanistic development related to the percentage RAP and slag.
The test results using Marshall resulted in the value of Optimum Asphalt Levels (KAO) being reduced with the addition of RAP in the HMARAP mixture. It is indicated that the RAP material could be activated properly, as well as in the HMASlag mixture. In the HMASlagRAP combination mixture, it was found that
adding RAP to the slag mixture reduced the KAO value thereby reducing the asphalt requirements in the mixture. The higher resilient modulus of mixture with the increase in slag and RAP percentage in the HMA slag and HMARAP mixture are related to the surface rough of the slag aggregate and the characteristics of the aging RAP material while the HMAslagRAP combination mixture resilient modulus increases with the addition of RAP to the slag mixture, and can reduce the sensitivity to temperature changes, especially in high temperature conditions (35 ° C to 45 ° C). This can overcome the weakness of aggregate slag that is sensitive to temperature changes.
Resistance to repetitive load fatigue decreased with increasing slag and RAP percentage in HMASlag and HMARAP asphalt mixture resulting in lower fatigue life value compared to the control mixture (HMA), where 10 % of the mixture of HMAslag and 20% of HMARAP gave the optimum value of fatigue life. In contrast, generally the addition of RAP in the slag mixture can reduce the value of the cycle load to be smaller. For HMACS30R20 mixture, the cycle load is the shortest compared to other mixture combinations. As for the CS10R20 and CS20R10 mixture, the number of cycle loads is better than the other mixes.
Resilient modulus developed model for AC-BC hot mixture uses slag and RAP is divided into two conditions, they are, elastic and viscous with independent variable. Those are asphalt stiffness modulus, volumetric mixture, slag and RAP material. As for the fatigue model the independent variable are the resilient modulus of mixture, strain, volumetric mixture, slag and RAP Material.
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Twidi Bethary, Rindu |
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Twidi Bethary, Rindu MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
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Twidi Bethary, Rindu |
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Twidi Bethary, Rindu |
title |
MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
title_short |
MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
title_full |
MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
title_fullStr |
MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
title_full_unstemmed |
MECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) |
title_sort |
mechanistic performance of binder layer (ac-bc) using steel slag as an aggregate substitute materials and reclaimed asphalt pavement (rap) |
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https://digilib.itb.ac.id/gdl/view/49786 |
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id-itb.:497862020-09-19T23:48:54ZMECHANISTIC PERFORMANCE OF BINDER LAYER (AC-BC) USING STEEL SLAG AS AN AGGREGATE SUBSTITUTE MATERIALS AND RECLAIMED ASPHALT PAVEMENT (RAP) Twidi Bethary, Rindu Indonesia Dissertations HMA, RAP, Slag, KAO, Resilient Modulus, Fatigue. INSTITUT TEKNOLOGI BANDUNG https://digilib.itb.ac.id/gdl/view/49786 The limitations of material for road construction and demand increase for aggregate and asphalt cause the high cost of construction and rehabilitation of roads so that it necessary to provide alternative materials such as recycled asphalt material and utilization of waste materials like steel slag to replace aggregated material. Slag aggregate which has a surface rough compared to natural aggregate, the thickness of the slag aggregate which prevents cracking by mixed internal friction, and the high adhesion between asphalt and slag have a better fatigue resistance, but it is susceptible to temperature sensitivity which is expected to overcome the shortcomings found in the RAP with rejuvenator reclamite. This study was aimed to conduct the evaluation and performance control of asphalt mixture with reclaimed asphalt pavement (RAP) and slag materials as a substitute for the aggregate. The used material in this study was a steel slag from Cilegon, RAP material from Cikampek, aggregates from Karawang quarry, and asphalt Pertamina pen 60/70. The tests were conducted by using an empirical method based on testing with Marshall Equipment, while for mechanistic method based on resilient modulus test with UMATTA, and Fatigue testing of Beam Fatigue Apparatus using four point loading method. The methdology of this study is divided into four stages, they are, the preliminary stage including a literature review and secondary data collection. The first processing phase is testing the material characteristic for asphalt material, aggregates, RAP and slag and design of mix asphalt which is made into sixteen mixture variations with different percentage from the RAP and slag and then be tested empirically by Marshall to get the value of the optimum asphalt content. The second phase is mechanistic performance to find value resilient modulus and fatigue resistance. The third phase is the hot mix asphalt performance mechanistic development related to the percentage RAP and slag. The test results using Marshall resulted in the value of Optimum Asphalt Levels (KAO) being reduced with the addition of RAP in the HMARAP mixture. It is indicated that the RAP material could be activated properly, as well as in the HMASlag mixture. In the HMASlagRAP combination mixture, it was found that adding RAP to the slag mixture reduced the KAO value thereby reducing the asphalt requirements in the mixture. The higher resilient modulus of mixture with the increase in slag and RAP percentage in the HMA slag and HMARAP mixture are related to the surface rough of the slag aggregate and the characteristics of the aging RAP material while the HMAslagRAP combination mixture resilient modulus increases with the addition of RAP to the slag mixture, and can reduce the sensitivity to temperature changes, especially in high temperature conditions (35 ° C to 45 ° C). This can overcome the weakness of aggregate slag that is sensitive to temperature changes. Resistance to repetitive load fatigue decreased with increasing slag and RAP percentage in HMASlag and HMARAP asphalt mixture resulting in lower fatigue life value compared to the control mixture (HMA), where 10 % of the mixture of HMAslag and 20% of HMARAP gave the optimum value of fatigue life. In contrast, generally the addition of RAP in the slag mixture can reduce the value of the cycle load to be smaller. For HMACS30R20 mixture, the cycle load is the shortest compared to other mixture combinations. As for the CS10R20 and CS20R10 mixture, the number of cycle loads is better than the other mixes. Resilient modulus developed model for AC-BC hot mixture uses slag and RAP is divided into two conditions, they are, elastic and viscous with independent variable. Those are asphalt stiffness modulus, volumetric mixture, slag and RAP material. As for the fatigue model the independent variable are the resilient modulus of mixture, strain, volumetric mixture, slag and RAP Material. text |