Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade

The subgrade’s good performance is required to support the upper layers. Excessive subgrade deformation causes a degradation in pavement performance. Traditionally, cement is used to improve it, but it’s environmentally unfriendly. Recently, modern methods have been needed to diminish cement use. Th...

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Main Authors: Toyeb Muhammad, Hakam Abdul, Fauzan, Andriani
Format: Article
Language:English
Published: Sciendo 2024-12-01
Series:Civil and Environmental Engineering
Subjects:
Online Access:https://doi.org/10.2478/cee-2024-0055
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author Toyeb Muhammad
Hakam Abdul
Fauzan
Andriani
author_facet Toyeb Muhammad
Hakam Abdul
Fauzan
Andriani
author_sort Toyeb Muhammad
collection DOAJ
description The subgrade’s good performance is required to support the upper layers. Excessive subgrade deformation causes a degradation in pavement performance. Traditionally, cement is used to improve it, but it’s environmentally unfriendly. Recently, modern methods have been needed to diminish cement use. This study aims to promote Alkali activator POFA (AAP) as a soil mixture binder for the subgrade layer. The subgrade behaviour was assessed by plate load and CBR test on soil, soil-POFA, and soil-AAP mixtures, as well as with SEM morphology observation. The soil is clayey sand with poor gradation. Applying a 2.0 KN load to soil and soil-POFA mixtures obtained decreased deformation in settlements from 3.77 to 3.21 mm. Meanwhile, the soil-AAP mixture exhibited a lower settlement of 0.86 mm only with applied a 5.0 KN load and has bearing capacity with maximum load of 45 kN. Furthermore, a significant increase in the CBR value from 4.4% to 54.0%. The soil-AAP stabilization can improve the mechanism characteristic of the soil becoming denser and reduce deformation. Incorporation of the POFA and alkali activator into soil mixtures leads to the reaction of aluminosilicate synthesis type C-S-H gel. Hence, the AAP is feasible for promoting modern stabilization.
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spelling doaj-art-a3d6f87678ed4a0b975c7c7c47208b3e2025-02-02T15:47:53ZengSciendoCivil and Environmental Engineering2199-65122024-12-0120273074110.2478/cee-2024-0055Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as SubgradeToyeb Muhammad0Hakam Abdul1Fauzan2Andriani3Doctoral Student, Civil Engineering Department, Andalas University, Padang 25163, IndonesiaCivil Engineering Department, Andalas University, Padang25163, IndonesiaCivil Engineering Department, Andalas University, Padang25163, IndonesiaCivil Engineering Department, Andalas University, Padang25163, IndonesiaThe subgrade’s good performance is required to support the upper layers. Excessive subgrade deformation causes a degradation in pavement performance. Traditionally, cement is used to improve it, but it’s environmentally unfriendly. Recently, modern methods have been needed to diminish cement use. This study aims to promote Alkali activator POFA (AAP) as a soil mixture binder for the subgrade layer. The subgrade behaviour was assessed by plate load and CBR test on soil, soil-POFA, and soil-AAP mixtures, as well as with SEM morphology observation. The soil is clayey sand with poor gradation. Applying a 2.0 KN load to soil and soil-POFA mixtures obtained decreased deformation in settlements from 3.77 to 3.21 mm. Meanwhile, the soil-AAP mixture exhibited a lower settlement of 0.86 mm only with applied a 5.0 KN load and has bearing capacity with maximum load of 45 kN. Furthermore, a significant increase in the CBR value from 4.4% to 54.0%. The soil-AAP stabilization can improve the mechanism characteristic of the soil becoming denser and reduce deformation. Incorporation of the POFA and alkali activator into soil mixtures leads to the reaction of aluminosilicate synthesis type C-S-H gel. Hence, the AAP is feasible for promoting modern stabilization.https://doi.org/10.2478/cee-2024-0055alkali activatordeformationpofastrengthsubgrade.
spellingShingle Toyeb Muhammad
Hakam Abdul
Fauzan
Andriani
Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
Civil and Environmental Engineering
alkali activator
deformation
pofa
strength
subgrade.
title Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
title_full Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
title_fullStr Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
title_full_unstemmed Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
title_short Study Experimental on Strength Characteristics of Alkali-Activated Pofa to Soil Stabilization as Subgrade
title_sort study experimental on strength characteristics of alkali activated pofa to soil stabilization as subgrade
topic alkali activator
deformation
pofa
strength
subgrade.
url https://doi.org/10.2478/cee-2024-0055
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AT hakamabdul studyexperimentalonstrengthcharacteristicsofalkaliactivatedpofatosoilstabilizationassubgrade
AT fauzan studyexperimentalonstrengthcharacteristicsofalkaliactivatedpofatosoilstabilizationassubgrade
AT andriani studyexperimentalonstrengthcharacteristicsofalkaliactivatedpofatosoilstabilizationassubgrade