LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50

Abstract : <br /> <br /> <br /> The high concentration of relatively single-size coarse aggregate in Split Mastic Asphalt (SMA) surfacing mix permits the use of high bitumen contents. To counteract drainage of bitumen from the mix, and reduce its temperature susceptibility, an add...

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Main Author: Sartiyono (NIM 269 96 031), Tasripin
Format: Theses
Language:Indonesia
Online Access:https://digilib.itb.ac.id/gdl/view/9446
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Institution: Institut Teknologi Bandung
Language: Indonesia
id id-itb.:9446
spelling id-itb.:94462017-09-27T15:21:02ZLABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50 Sartiyono (NIM 269 96 031), Tasripin Indonesia Theses INSTITUT TEKNOLOGI BANDUNG https://digilib.itb.ac.id/gdl/view/9446 Abstract : <br /> <br /> <br /> The high concentration of relatively single-size coarse aggregate in Split Mastic Asphalt (SMA) surfacing mix permits the use of high bitumen contents. To counteract drainage of bitumen from the mix, and reduce its temperature susceptibility, an additive is included in mix. <br /> <br /> <br /> Roadcel-50, a locally-produced additive, is derived from wood pulp and contains about 90% cellulose fibre. This thesis describes a laboratory evaluation of SMA mixes containing Roadcel-50 in the amounts 0%, 0.15%, 0.3%, 0.45% and 0.6% by weight of aggregate plus bitumen. For purposes of comparison, an asphalt concrete(AC) surfacing, LASTON Type IV, was also evaluated. <br /> <br /> <br /> Preliminary investigations showed that the addition of Roadcel-50 to bitumen resulted in increased softening point and reduced penetration, indicating a reinforcing effect. Of the SMA mixes investigated only those made with 0.15% and 0.3% complied fully with Bina Marga design criteria and had optimum bitumen contents in the range specified; the optimum bitumen content of the SMA mix made with 0% additive was outside the lower limit of the Bina Marga range while an optimum bitumen content could not be determined for the mixes containing 0.45% and 0.60% additive because of non-compliance with the criterion for Marshall quotient. <br /> <br /> <br /> Addition of Roadcel-50 increases the capacity of the SMA mix to hold bitumen. Bitumen film thickness increases with increase in Roadcel-50 content and this is reflected in improved resistance to water damage. The low Marshall quotient of the SMA mixes relative to the AC mix suggests that these mixes have greater flexibility and resistance to cracking; the greater bitumen film thickness and the consequent improved resistance to hardening indicates that flexibility will be retained for a longer period. <br /> <br /> <br /> The stability of the AC mix at optimum bitumen content is considerably higher than that of the SMA mixes, all of which have comparable levels of stability. In contrast, the performance of SMA mixes in the wheel tracking test is much superior to that of the AC mix; the resistance of SMA mix to deformation, as indicated by this test, increases with increase in Roadcel-50 content. Other types of test are needed to investigate more thoroughly the relative resistance to permanent deformation of the SMA and AC mixes. Except for the wheel tracking test SMA mixes made with 0.15% and 0.3% Roadcel-50 are comparable in performance. Practical considerations may necessitate the use of the higher additive content. <br /> text
institution Institut Teknologi Bandung
building Institut Teknologi Bandung Library
continent Asia
country Indonesia
Indonesia
content_provider Institut Teknologi Bandung
collection Digital ITB
language Indonesia
description Abstract : <br /> <br /> <br /> The high concentration of relatively single-size coarse aggregate in Split Mastic Asphalt (SMA) surfacing mix permits the use of high bitumen contents. To counteract drainage of bitumen from the mix, and reduce its temperature susceptibility, an additive is included in mix. <br /> <br /> <br /> Roadcel-50, a locally-produced additive, is derived from wood pulp and contains about 90% cellulose fibre. This thesis describes a laboratory evaluation of SMA mixes containing Roadcel-50 in the amounts 0%, 0.15%, 0.3%, 0.45% and 0.6% by weight of aggregate plus bitumen. For purposes of comparison, an asphalt concrete(AC) surfacing, LASTON Type IV, was also evaluated. <br /> <br /> <br /> Preliminary investigations showed that the addition of Roadcel-50 to bitumen resulted in increased softening point and reduced penetration, indicating a reinforcing effect. Of the SMA mixes investigated only those made with 0.15% and 0.3% complied fully with Bina Marga design criteria and had optimum bitumen contents in the range specified; the optimum bitumen content of the SMA mix made with 0% additive was outside the lower limit of the Bina Marga range while an optimum bitumen content could not be determined for the mixes containing 0.45% and 0.60% additive because of non-compliance with the criterion for Marshall quotient. <br /> <br /> <br /> Addition of Roadcel-50 increases the capacity of the SMA mix to hold bitumen. Bitumen film thickness increases with increase in Roadcel-50 content and this is reflected in improved resistance to water damage. The low Marshall quotient of the SMA mixes relative to the AC mix suggests that these mixes have greater flexibility and resistance to cracking; the greater bitumen film thickness and the consequent improved resistance to hardening indicates that flexibility will be retained for a longer period. <br /> <br /> <br /> The stability of the AC mix at optimum bitumen content is considerably higher than that of the SMA mixes, all of which have comparable levels of stability. In contrast, the performance of SMA mixes in the wheel tracking test is much superior to that of the AC mix; the resistance of SMA mix to deformation, as indicated by this test, increases with increase in Roadcel-50 content. Other types of test are needed to investigate more thoroughly the relative resistance to permanent deformation of the SMA and AC mixes. Except for the wheel tracking test SMA mixes made with 0.15% and 0.3% Roadcel-50 are comparable in performance. Practical considerations may necessitate the use of the higher additive content. <br />
format Theses
author Sartiyono (NIM 269 96 031), Tasripin
spellingShingle Sartiyono (NIM 269 96 031), Tasripin
LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
author_facet Sartiyono (NIM 269 96 031), Tasripin
author_sort Sartiyono (NIM 269 96 031), Tasripin
title LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
title_short LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
title_full LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
title_fullStr LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
title_full_unstemmed LABORATORY EVALUATION OF SPLIT MASTIC ASPHALT (SMA) CONTAINING ROADCEL-50
title_sort laboratory evaluation of split mastic asphalt (sma) containing roadcel-50
url https://digilib.itb.ac.id/gdl/view/9446
_version_ 1820664698717077504