Artificial Aggregate Variations Made From Fly Ash in Asphalt Mixes
Mirza Al Mahbubi (a*), Ir. Ervina Ahyudanari, ME., Ph.D (a)
a) Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Jl. Raya ITS, Surabaya 60111 Indonesia
*Mirzaalmahbubi[at]gmail.com
Abstract
The quality of road pavement construction is strongly influenced by the composition of the material used, including the type of aggregate. Selection of the type of aggregate suitable for use in pavement construction is influenced by several factors, namely gradation, shape and surface texture. Aggregates have various forms and textures including round and cube shapes. At present, infrastructure development in Indonesia continues to increase the amount of natural aggregate use, so this will cause the availability of raw aggregate raw materials to continue to thin out. Fly ash can be an alternative for material. Fly ash coal must be reacted with chemical solutions as a mixed material so that it can be a geopolymer material, in this study Fly ash will be mixed with a chemical solution in the form of sodium hydroxide (NaoH) and sodium silicate (Na2SiO3). In this study there are two variations of the aggregate form to be used, namely the spherical shape of the processed granulator and the irregular shape of the processed stone crusher. With the addition of 25% round artificial aggregate and 25% artificial aggregate processed by stone crusher can provide high stability and meet specifications according to the Federal Aviation Administration (FAA).
Keywords: artificial aggregate , fly ash, geopolimer, marshall, stability
Topic: International Symposium of Civil, Environmental, and Infrastructure Engineering