Skripsi
Performance analysis of AC-WC (asphalt concrete-wearing course) mixtures using fly ash and bamboo leaf ash as a filler combination in riview of marshall parameter / Elsa Anis Sintya
Abstrak
One of the causes of road damage is the pavement material factor. So that good planning is needed to prevent damage before the planned age. One of the asphalt mixtures used is AC-WC which consists of asphalt aggregate and filler. In an effort to improve the quality of the mixture various innovations began to be developed one of which was through the use of alternative materials such as fly ash and bamboo leaf ash. In addition to potentially improving the performance of the mixture the utilization of these materials also supports the use of more efficient and valuable materials. The objectives of this research are (1) to analyze the characteristics of AC-WC mixtures using various levels of fly ash and bamboo leaf ash filler combinations (2) to analyze the performance of AC-WC mixtures using fly ash and bamboo leaf ash as a combination of fillers in terms of Marshall parameters (3) to analyze the residual strength index (IKS) values based on the combination of fly ash and bamboo leaf ash as filler in AC-WC mixtures. This research uses experimental methods to obtain descriptive data about the characteristics of AC-WC mixtures with a combination of fly ash (FA) and bamboo leaf ash (ADB) fillers in terms of Marshall parameters. The research design begins with the selection and inspection of the materials that make up the AC-WC mixture (aggregate filler and asphalt). Furthermore test specimens were made using the Marshall method to determine the optimum asphalt content (KAO) with variations in asphalt content of 5% 5.5% 6% 6.5% and 7%. The fillers used were 100% FA and 100% ADB which were then analyzed to determine the KAO of the two fillers. The KAO obtained was used to determine the optimum filler content (KFO) with variations in FA ADB content (100% 0% 75% 25% 50% 50% 25% 75% 0% 100%). Test specimens were then made to determine the residual strength index (IKS) by immersion at 60 deg C for 30 minutes and 24 hours using all variations of FA ADB content. The results of this study are (1) the characteristics of AC-WC mixtures in the form of coarse aggregate fine aggregate filler and asphalt have met the General Specifications of Bina Marga (2018) (2) the performance of AC-WC mixtures with a combination of fly ash and bamboo leaf ash as filler shows that increasing ADB and reducing FA causes stability and MQ to increase and then decrease while flow VIM and VMA decrease and VFA increases. The optimum filler content (KFO) was obtained at 50% FA and 50% ADB. (3) the residual strength index (IKS) shows a decrease in stability from 30 minutes to 24 hours immersion. Only the levels of 100 0 75 25 and 50 50 meet the 2018 Bina Marga General Specifications and at levels of 25 75 and 0 100 the IKS values do not meet the specifications with values of 81.57% and 85.81%.