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Journal : Civil Engineering Forum Teknik Sipil

PEMANFAATAN BGA (BUTON GRANULAR ASPHALT) SEBAGAI BAHAN PENGGANTI AGREGAT HALUS PADA CAMPURAN HRS-WC SECARA LABORATORIUM Prawira, Abdi; Suparma, Latif Budi
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Along with the improvement and development for keeping the road infrastructure in Indonesia, it is important to be far more comprehends and does testing to exploite nature material. The development of the existing firm layer material technology is very fast, to create technological innovation to efecienti cost, optimalisation of material exploition, expansion of natural material, and environmental friendliness like BGA (Buton Granular Asphalt) in the place of smooth aggregate at mixture HRS-WC. Exploition of BGA for the subsitution of fine aggregates done at this research through volume equivalent, using various comparison of fine aggregates used by BGA are (0%:100%), (25%:75%), (50%:50%) and (100%:0%). Method applied is Marshall and immersion, and determines optimum asphalt content from each various specimen. Specimen at optimum asphalt content was immersed ½ hour (Marshall Standard) and 24 hours, then Marshall test is done. Marshall test and immersion are done to study the influence of various usage of BGA based on its stability values and indexs of retained strength. The result of this research shows optimum asphalt grade of specimen with various BGA of 0%, 25%, 50%, 75% and 100% is 6.37%; 4.85%; 4.49%; 4.15% and 4.55%. At Marshall standard various BGA 0%, 25%, 50%, 75% and 100% stability value of 1340 kgs, 1700 kgs, 1765 kgs, 1589 kgs and 1520 kgs is obtained while index of retained strength is 99.57%; 75.63%; 70.02%; 94.12% and 72.87%. These results show that utilization of BGA can reduce optimum asphalt grade, increase stability values and durability indexes on the HRS-WC mixture. Keywords : HRS-WC, BGA (Buton Granular Asphalt), Marshall.
PERANCANGAN LABORATORIUM CAMPURAN HRS-WC DENGAN PENGGUNAAN BUTON GRANULAR ASPHALT (BGA) SEBAGAI BAHAN ADDITIVE Howardy, Howardy; Suparma, Latif Budi; Satyarno, Iman
Civil Engineering Forum Teknik Sipil Vol 18, No 3 (2008): SEPTEMBER 2008
Publisher : Civil Engineering Forum Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.995 KB)

Abstract

Increasing demand for asphalt in the country results in 650,000 tons of imported asphalt per year. The early damage of asphalt pavement is due to increasing axle loads and high temperature climates. On the other side, natural asphalt in Buton island of Sulawesi Tenggara, which is the biggest natural asphalt deposit district in world containing about 677 million tons of asphalt, has not been optimally exploited. This research designs HRS-WC mixture by utilizing Buton Granular Asphalt ( BGA), one of Buton asphalt form, as additive in the binder. The objective of this research is to identify mixture characteristics by referring to Marshall characteristic. Mixture is designed under the Marshall Standard procedure and 24 hours Marshall Immersion at optimum binder content according to Indonesian specification (Bina Marga, 2005) for Hot Rolled Sheet-Wearing Course ( HRS-WC). Mixture design applies the additive BGA (Buton Granular Asphalt) variations of 0%, 2%, 4%, 6%, 8% and 10% to the total mixture. The results of the research showed the optimum asphalt content of specimen Buton Granular Asphalt (BGA) variations of 0%, 2%, 4%, 6%, 8%, and 10% were 8.3%, 7.7%, 7.2%, 6.7%, 6.4%, and 6.3%, respectively. The misture reached the Stability values at 1373.8 kgs, 1554.9 kgs, 1493.1 kgs, 1419.3 kgs, 1230.0 kgs, and 1429.3 kgs, respectively. Index of retained strength obtained were 98.1%, 75.4%, 87.9%, 93.0%, 98.6%, and 80.5%, respectively. Composition suitable for addition Buton Granular Asphalt (BGA) at HRS-WC mixture were 2% and 4% BGA, with the mixture density values of 2.266 gr/cm3 and 2.218 gr/cm3, mixture VMA values of 19.9% and 18.9%, mixture VFWA values of 74.7% and 71.4%, mixture VITM values of 5.0% and 5.4%, mixture Stability values of 1554,9 kgs and 1493,1 kgs, mixture flow value of both of 3,0 mm, mixture MQ values of524.1 kg/mm and 493.1 kg/mm, mixture Index of retained strength of 75.4% and 87.9%.