TY - GEN
T1 - Reliability analysis of polyvinyl alcohol fiber-reinforced soft subgrade soil treated with lime and alkali activated stabilizer
T2 - 2023 Geo-Congress: Sustainable Infrastructure Solutions from the Ground Up - Soil Improvement, Geoenvironmental, and Sustainability
AU - Syed, Mazhar
AU - Moghal, Arif Ali Baig
AU - Chittoori, Bhaskar
N1 - Publisher Copyright:
© 2023 American Society of Civil Engineers (ASCE). All rights reserved.
PY - 2023
Y1 - 2023
N2 - The present research has made an effort to support the subgrade strength performance of polyvinyl alcohol fiber-reinforced (PAF) soft soil stabilized with an alkali-Activated stabilizer (AAS). The research compares the subgrade stiffness parameters (resilient modulus, penetration, and flexural resistance) between hydrated lime and alkaline stabilizer mixed PAF-soil at various slag/bagasse ash (BA) proportions. The influences of slag, BA, and PAF changing percentages in the AAS-soil matrix on the California Bearing ratio (CBR) and soil-beam flexural strength (Sf) are evaluated. The study also proposes an optimum dosage of slag-BA-PAF in alkaline stabilized soft subgrade soil. It is observed that PAF-AAS soil exhibits higher interfacial interactions and inter-bonding density than lime-PAF-soil under low tensile cracking. The combined PAF (0.6%) with 20% BA replacement with slag in the alkaline stabilizer strengthens the CBR and flexural strength by around 45% over lime soil-fiber mixtures. Moreover, a detailed reliability index (β) was also conducted to evaluate further the impact of uncertainties in the PAF-AAS-soil mixture on subgrade performance. The research study shows that the higher percentage of PAF-slag in a BA-based AAS mixture can substantially improve the stiffness and durability of soft subgrade soil.
AB - The present research has made an effort to support the subgrade strength performance of polyvinyl alcohol fiber-reinforced (PAF) soft soil stabilized with an alkali-Activated stabilizer (AAS). The research compares the subgrade stiffness parameters (resilient modulus, penetration, and flexural resistance) between hydrated lime and alkaline stabilizer mixed PAF-soil at various slag/bagasse ash (BA) proportions. The influences of slag, BA, and PAF changing percentages in the AAS-soil matrix on the California Bearing ratio (CBR) and soil-beam flexural strength (Sf) are evaluated. The study also proposes an optimum dosage of slag-BA-PAF in alkaline stabilized soft subgrade soil. It is observed that PAF-AAS soil exhibits higher interfacial interactions and inter-bonding density than lime-PAF-soil under low tensile cracking. The combined PAF (0.6%) with 20% BA replacement with slag in the alkaline stabilizer strengthens the CBR and flexural strength by around 45% over lime soil-fiber mixtures. Moreover, a detailed reliability index (β) was also conducted to evaluate further the impact of uncertainties in the PAF-AAS-soil mixture on subgrade performance. The research study shows that the higher percentage of PAF-slag in a BA-based AAS mixture can substantially improve the stiffness and durability of soft subgrade soil.
UR - http://www.scopus.com/inward/record.url?scp=85151734621&partnerID=8YFLogxK
U2 - 10.1061/9780784484661.044
DO - 10.1061/9780784484661.044
M3 - Conference contribution
AN - SCOPUS:85151734621
T3 - Geotechnical Special Publication
SP - 422
EP - 432
BT - Geotechnical Special Publication
A2 - Rathje, Ellen
A2 - Montoya, Brina M.
A2 - Wayne, Mark H.
Y2 - 26 March 2023 through 29 March 2023
ER -