Potential Use of Fly Ash Base-Geopolymeras Aggregate Substitution in Asphalt Concrete Mixtures

Abstract

Abstract-Infrastructure industry is still dominant in developing countries. These activities requires a large number of aggregates. To make cement concrete and asphalt concrete, itrequires60% to 75% of aggregate in total volume of the mixture. This high volume of aggregates may cause reduction on availability of natural aggregate. Another problem is that not all area in Indonesia has the ability to provide adequate aggregates so that it can support the infrastructure development, especially in remote areas. The aggregate mobilization may face disruption. This research attempts to present an idea of creating an artificial aggregate. The artificial aggregate is made of power plant waste that is mixed with alkali silica, named as fly ash geopolymer. Previous study indicates that the use of fly ash geopolymer as filler replacement in asphalt concrete mixture, is able to double the stability of Marshall test. This experiment serves a role to design an artificial aggregate.

Analisis Perbandingan Kadar Aspal Optimum (KAO) untuk Perbedaan Gradasi (BBA, FAA dan BM)

“…Pada agregat kasar menggunakan geopolimer agregat buatan 25% dan alami 75%. Agregat buatan ini telah diuji dan diketahui bahwa karakteristik agregat buatan memiliki karakteristik yang baik [7]. Berikut ini spesifikasi standar dari 3 agregat tercantum pada Gambar 1, Gambar 2, dan Gambar 3.…”

Pengaruh Variasi Penambahan Agregat Buatan Terhadap Kadar Aspal Optimum untuk Perkerasan Aspal Lapis Aus

“…Telah dilakukan penelitian mengenai pasta geopolimer dengan komposisi campuran 75% fly ash berbanding 25% alkali aktifator [5]. Alkali aktifator yang digunakan adalah Na2SiO3 dan NaoH.…”

“…Hasil penelitian menunjukkan bahwa kerapatan dari geopolimer dengan rasio alkali aktivator 1.5, 2, dan 2.5 adalah 2.35, 2.38 dan 2.30. Sementara kuat tekan rata-rata rasio alkali aktivator 1.5, 2, dan 2.5 adalah 48.09, 40.68, dan 30.45 [5]. Sehingga dapat disimpulkan bahwa agregat buatan dapat dibuat dari geopolimer berbahan dasar fly ash.…”

“…Sehingga dapat disimpulkan bahwa agregat buatan dapat dibuat dari geopolimer berbahan dasar fly ash. Agregat ini dapat digunakan sebagai pengganti agregat untuk campuran aspal beton [5].…”

Preparation and Investigation of Geopolymers Generated From Construction, Demolition and Industrial Wastes

“…1 illustrates the raw materials used for sample preparation. The geopolymer samples were prepared by the following procedure, according to Karyawan et al [22] (Fig. 2).…”