| Title | Mix optimization for expansive soil stabilized with a novel waste material-based geopolymerization approach |
|---|---|
| ID_Doc | 14918 |
| Authors | Maheepala, MMALN; Nasvi, MCM; Robert, DJ; Gunasekara, C; Kurukulasuriya, LC |
| Title | Mix optimization for expansive soil stabilized with a novel waste material-based geopolymerization approach |
| Year | 2024 |
| Published | |
| Abstract | Extensive areal distribution of expansive soil is a timely concern in engineering challenges. Geopolymers outperform conventional cement/lime treatment in expansive soil stabilization due to their superior mechanical and durability performance. However, the excessive cost and carbon footprint of commercial alkaline activators hinder geopolymer's widespread application. This study aims to derive a cost-effective, carbon-conscious mix to stabilize expansive soil using waste-based geopolymerization. Class F fly ash was activated via a novel solution of rice husk ash (RHA)-derived silicate and NaOH. Three factors (NaOH/RHA, NaOH molarity, mixing duration) were considered using the Taguchi method and utility concept for mix optimization, while further investigations were tailored to explore the effects of curing temperature (room temperature, 30 degrees C, and 40 degrees C) and the curing period (7, 14, and 28 days) on the strength development of treated soil. The results indicate that NaOH/RHA = 0.6, NaOH molarity = 3 mol/L, and a mixing duration of 40 min with curing temperatures of around 30 degrees C are ideal for maximizing the strength cost-effectively while significantly reducing the swell pressure (up to 28%). The shift from commercial Na 2 SiO 3 to RHA-silicate is 89% cheaper and reduces the carbon footprint by 70%. The study benefits sustainable ground stabilization and efficient waste management. |
Similar Articles
| ID | Score | Article |
|---|---|---|
19702
|
Lei, ZH; Pavia, S Geopolymer based on biomass ash from agricultural residues(2024) | |
| 25870
|
Danish, A; Torres, AS; Moro, C; Salim, MU Hope or hype? Evaluating the environmental footprint of reclaimed fly ash in geopolymer production(2024) | |
| 5577
|
Petrus, HTBM; Olvianas, M; Shafiyurrahman, MF; Pratama, IGAAN; Jenie, SNA; Astuti, W; Nurpratama, MI; Ekaputri, JJ; Anggara, F Circular Economy of Coal Fly Ash and Silica Geothermal for Green Geopolymer: Characteristic and Kinetic Study(2022)Gels, 8, 4 | |
| 22864
|
Kanagaraj, B; Anand, N; Alengaram, UJ; Raj, RS; Kiran, T Exemplification of sustainable sodium silicate waste sediments as coarse aggregates in the performance evaluation of geopolymer concrete(2022) | |
| 8922
|
Yaghoubi, M; Arulrajah, A; Horpibulsuk, S Engineering Behaviour of a Geopolymer-stabilised High-water Content Soft Clay(2022)International Journal Of Geosynthetics And Ground Engineering, 8.0, 3 | |
| 6179
|
Kanagaraj, B; Anand, N; Alengaram, J; Andrushia, D Post-fire behavior of geopolymer concrete with sodium silicate waste as an alternative to conventional river sand(2023) | |
| 13051
|
Munawar, M; Khan, AH; Rehman, ZU; Rahim, A; Aziz, M; Almuaythir, S; El Kheir, BSIA; Haider, F Micro to Nanolevel Stabilization of Expansive Clay Using Agro-Wastes(2023) | |
| 13417
|
Saeli, M; Tobaldi, DM; Seabra, MP; Labrincha, JA Mix design and mechanical performance of geopolymeric binders and mortars using biomass fly ash and alkaline effluent from paper-pulp industry(2019) | |
| 12194
|
Pratap, B; Mondal, S; Rao, BH NaOH molarity influence on mechanical and durability properties of geopolymer concrete made with fly ash and phosphogypsum(2023) | |
| 23619
|
de Carvalho, TA; Gaspar, F; Marques, AC; Mateus, A Optimization of formulation ratios of geopolymer mortar based on metakaolin and biomass fly ash(2024) |