Work

The characteristic of andesite waste powder (AWP) as a replacement for fly ash geopolymer paste

Year: 2024

Type: conference-paper

Abstract: Large-scale production of andesite has created much waste. Andesite waste material has SiO2 (Si) as a main component and causes pozzolanic activity. During the mining, processing, and polishing steps, almost 70% of this waste is thrown away. This research studied the potential of andesite waste material (AWP) as a substitution for fly ash. Six compositions of geopolymer paste with AWP were mixed to determine the ability of andesite waste powder (AWP) to be a silica source material in geopolymer paste. AWP ranged from 0%, 10%,20%,30%,40% and 50% from the unit weight of fly ash. 10 Molar of NaOH and Na2SiO3 were used as an alkaline activator. The ratio between Na2SiO3 and NaOH was constant at 2. The water-to-solid ratio was kept constant at 35%. Flow test and compressive strength of geopolymer were tested according to ASTM C1437 and ASTM C109, respectively. The result showed that the AWP affected the workability of the geopolymer paste. The geopolymer unit weight increases at 10% of AWP and decreases gradually when the AWP content rises. The geopolymer achieves a maximum compressive strength of 41.55 MPa over 28 days when 30% AWP is used. As a silica source, AWP can be used to replace fly ash geopolymer, based on the study’s results.

Source: IOP Conference Series Earth and Environmental Science

DOI: 10.1088/1755-1315/1416/1/012043

Authors: Ni Komang Ayu Agustini, I Nengah Sinarta, Putu Aryastana, I Gusti Ngurah Agung Eka Arya Tejadinata, Ni Putu Wintya Tresna Dewi

Institution: Warmadewa University

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: diamond

OpenAlex ID: W4405257664

FWCI:

Cites: 13

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Related to: 10