Effects of Aggregate Abrasrion Values to Marshall Properties of Asphalt Concrete AC- WC (original) (raw)
Related papers
Proceedings of the 11th Asia Pacific Transportation and the Environment Conference (APTE 2018), 2019
Reclaimed Asphalt Pavement (RAP) is a paving stripping material with Cold Milling Machine. The RAP accumulation in East Java Province is estimated 50,000 m 3 per-year. The RAP usage can decrease RAP accumulation, natural material, damage rate by mining or excavation. RAP mixture produced an optimum performances (workability, stability). RAP improved volumetric and mechanical properties of mixture. On the other hand, the usage of RAP increased the brittleness of pavement. It is necessary to support in microstructural aspect so the addition of RAP can produce better performance. The objective of this study is to obtain physical and mechanical properties of asphalt concrete contain RAP. Method used literature study. The result showed the physical properties of aggregate and asphalt RAP according the specification standard exception on gradation, penetration and ductility. The Asphalt Concrete with RAP include in specification standard, exception was in the range of 3.78-4.63%, the optimum in VIM PRD. The asphalt content in RAP RAP of 20-30%. RAP can be used as AC-WC, AC-BC, AC-Base. The strength of RAP depends on the source of RAP. The usage of RAP requires new or other material so it become the environment friendly material.
The increasing of road material demand particularly on aggregate has been followup by finding the new alternative materials. Local materials such as Bantak and Clereng are potentially to substitute current need. Apparently Bantak is having high porosity and abrasion value more than 40%, on other hand Clereng is giving lower abrasion value (± 25%) than Bantak. Therefore, it is essential to study the performance and durability of these materials in AC-WC mixture. To find the durability index, the specimens are immersed around 0 (unconditioned) to 14 days at 60oC and tested by using Marshall and ITS. From the Marshall test, the index values for aggregate variations I, II, and III are 35.01%, 28.11%, and 26.10% respectively. Based on ITS test, the indexes are 33.70%, 27.97%, and 25.45% respectively. The best result is variation III as the lowest value because has less of Bantak, which means less porosity and water absorption.
Mineral aggregate constitutes approximately 95% of hot mix asphalt by weight. The present study includes the determination of particle index based on fractured faces counts of coarse aggregate i.e. less than 2, more than or equal to 2 and more than 3 and its influences on marshall and fatigue properties of hot mix asphalt mixtures. The different particle index values ranging from 9 to 16 for the coarser size (19-13.2mm) have been determined and the same are used in the marshall mix design. The important factor for minimizing fatigue property of hot mix asphalt (HMA) mixture are, the fractured face count for coarse aggregate. The objective of the study is to evaluate the effect of particle index value on aggregate properties. Asphalt mix with crushed particles produces higher stability values with the increase in particle index value. The study also found that an increase in the amount of crushed particles causes decrease in unit weight and an increase in voids in mineral aggregate and optimum asphalt content. As fractured faces counts increases, the stiffness ratio (TSR) also increases. More the particle index value better will be the resistance to fatigue (Permanent deformation of the pavement).
The Composition Aggregate Uses: A Grain of Buton Asphalt
IOP Conference Series: Earth and Environmental Science
The most widely used pavement structures in Indonesia are flexible pavements consisting of coarse aggregate compositions, fine aggregates, asphalt and filler materials. The type of pavement used is densely graded pavement (asphalt concrete). The ability of the mixture of asphalt concrete in holding the vehicle load (traffic) is strongly influenced by the quality of the asphalt concrete mix. This study aims to find out the composition of Muara Takus quarry aggregate usage of Asphalt Concrete-Binder Course (AC-BC) asphalt mixture with the use of Asphalt Buton Grain type 5/20 and penetration asphalt 60/70. The method used is a survey of direct sampling to the field and testing laboratory. a Sampling of aggregate data is done in the field and then sieve analysis using the standard in accordance with SNI 1968: 2008 and aggregate composition. The results of the screening analysis of both AC-BC asphalt mixtures using Asphalt Liquid Pen 60/70 and Asphalt Buton Grain Type 5/20 there is a very significant difference to the use of aggregate on Asphalt Buton Grain Type 5/20 is the direct addition of Asphalt Buton Grain alone into the Asphalt AC-BC mixture and not using a filler.
Impact of Aggregate Gradation and Filler Type on Marshall Properties of Asphalt Concrete
The Journal of Engineering, 2015
As asphalt concrete wearing course (ACWC) is the top layer in the pavement structure, the material should be able to sustain stresses caused by direct traffic loading. The objective of this study is to evaluate the influence of aggregate gradation and mineral filler type on Marshall Properties. A detailed laboratory study is carried out by preparing asphalt mixtures specimens using locally available materials including asphalt binder (40-50) penetration grade, two types of aggregate gradation representing SCRB and ROAD NOTE 31 specifications and two types of mineral filler including limestone dust and coal fly ash. Four types of mixtures were prepared and tested. The first type included SCRB specification and limestone dust, the second type included SCRB specification and coal fly ash, the third types included ROAD NOTE 31 specification and limestone dust and the fourth type included ROAD NOTE 31 specification and coal fly ash. The optimum asphalt content of each type of mixtures ...
The Open Civil Engineering Journal
Background: Micro-texture and macro-texture are two essential parameters that functionally evaluate friction on asphalt pavement surface. While micro-texture indicates the irregularity of aggregate using British Pendulum Tester (BPN), macro-texture shows the larger irregularity of asphalt mix surface using Mean Texture Depth (MTD). Both micro-texture and macro-texture contribute to increased skid resistance value, which is needed for road to meet the safety qualification. Aim: This study aims to investigate the effect of local aggregate types and aggregate proportion (%) on asphalt mix on pavement textures (micro and macro-texture). Methods: Laboratory experiments were conducted on four types of local aggregates (A, B, C, and D), which were carried from West Java, Indonesia, and aggregate has a different characteristic to each other. In addition, three asphalt mix types (SMA-fine, AC-WC, and HRS-WC), each containing varying proportion (%) of aggregates, were investigated to analyze ...
Influence of Coarse Aggregate Shape on the Strength of Asphalt Concrete Mixtures
Journal of the Eastern Asia Society for Transportation Studies, 2005
The objectives of this paper are to evaluate aggregate characteristics including elongation, flatness, and other shape indices. The following particle shapes were selected for this study: cubical, rod, disk, and blade. The change in rotation angle of coarse aggregate was found to correlate well with the internal resistance of a HMA mix. The particle index (PI) was shown to be an adequate measure of the combined contribution of particle shape, angularity, and surface texture to the stability of an aggregate. The PI value correlated well to aggregate geometric characteristics including elongation ratio, flatness ratio, shape factor, and sphericity. Cubical particles were desirable for increased aggregate internal friction and improved rutting resistance. The more cubical the aggregate, the higher the PI value. The PI value of coarse aggregate significantly affected the engineering properties of a HMA mix. The particle shape determined how aggregate was packed into a dense configuratio...
Geotechnical and Geological Engineering, 2018
The abrasion and impact resistance of aggregates are important factors that should be taken into consideration during the production of concrete or asphalt that are subjected to abrasion and impact. The aim of this study was to examine the relationship between abrasion and impact resistance of aggregates related to the rivers, alluvial fans and taluses. In order to achieve this purpose, samples were collected from 3 rivers, 12 alluvial fans and 2 taluses located in Direh in Kermanshah province, Iran. The samples were studied in terms of changes in void ratio, cracks and weight loss induced by abrasion and impact. The lowest amount of weight loss due to abrasion and impact was observed in aggregates from rivers, with about 30% weight loss due to abrasion and 15% due to impact. The highest amount of weight loss was found among aggregates collected from taluses (45% for abrasion and 35% for impact). This results can be attributed to the degree of cracks and porosity in aggregates. It was also observed that the abrasion and impact resistance of aggregates in alluvial fans was dependent on the morphometric properties of alluvial fans catchment. Thus, a lower amount of weight loss caused by abrasion and impact was in aggregates taken from alluvial fans with larger catchments and longer main channel catchments.
Analysis of AC-WC Design Material Using Reclaimed Asphalt Pavement
Civil Engineering and Architecture, 2020
The recycling technique using materials produced by Cold Milling Machine is a potential alternative to be applied to road maintenance in Indonesia. This study aims to investigate the properties of Reclaimed Asphalt Pavement (RAP) used as Asphalt Concrete Wearing Course (AC-WC) so that the proportion of additional fresh aggregate can be determined. This laboratory-scale study uses the material of RAP from Semarang Section A toll road sections and penetrated asphalt of 60/70. The extraction analysis obtained asphalt content is between 3.50%-4.36%, with abrasion of 29.04%. RAP cannot be used directly but there is a need to add fresh aggregate so that the mixture meets the specifications. The proportion of the mixture is 30% of RAP, 18% of the fresh aggregate, 50% of rock ash, and 2% of Cement. The analysis shows that the mixture with optimum asphalt content (5.7%) obtained 1188 kg of stability, 4.02% of VIM, 15.81% of VMA, 74.54% of VFWA, and 3.57 mm of flow. These values indicate that the mixture meets the revised version of the Technical Specifications of Bina Marga 2010. Therefore, it can be said that this mixture has high durability, good density, and is resistant to the possibility of bleeding.