Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures

J.S. Dunham-Friel, J. Antonio Carraro

Research output: Chapter in Book/Conference paperConference paper

7 Citations (Scopus)

Abstract

The effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures was evaluated in this study in undrained axisymmetric compression. The materials tested included an expansive soil from Loveland, Colorado; two granulated rubber samples with 4.8 or 6.7 mm nominal maximum particle size; and a 50/50 mix of broken auto glass and crushed bottle glass. The effect of compaction effort was investigated by preparing and testing identical ESR mixtures compacted to either 95% of the standard or modified Proctor maximum dry densities at optimum water content. The effect of granulated rubber size was investigated by preparing and testing specimens with either 4.8 or 6.7 mm granulated rubber. The effect of inclusion stiffness was investigated by replicating the gradation of the 6.7 mm granulated rubber with two types of glass and testing an expansive soil-glass (ESG) mixture compacted to 95% of the standard Proctor maximum dry density for the ESG mixture. Specimens were evaluated for strength and stiffness by performing isotropically consolidated undrained triaxial tests at a mean effective stress equal to 25 kPa. Peak and critical state friction angles increased with increasing compaction of the ESR specimens in addition to a slight increase in stiffness. The stress-strain response is shown to be similar for both sizes of granulated rubber but the 6.7 mm granulated rubber particle size resulted in slightly higher peak and critical state friction angles. The stiffness of the inclusions is shown to change the material stress-strain response and stiffness substantially. © 2014 American Society of Civil Engineers.
Original languageEnglish
Title of host publicationGeotechnical Special Publication
PublisherAmerican Society of Civil Engineers
Pages3635-3644
Volume1
ISBN (Print)9780784413272
DOIs
Publication statusPublished - 2014
EventGeo-Congress 2014 - Alanta, United States
Duration: 23 Feb 201426 Feb 2014

Conference

ConferenceGeo-Congress 2014
CountryUnited States
CityAlanta
Period23/02/1426/02/14

Fingerprint

Shear strength
Rubber
Compaction
Stiffness
Soils
Glass
Testing
Particle size
Glass bottles
Friction
Water content
Engineers

Cite this

Dunham-Friel, J. S., & Carraro, J. A. (2014). Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures. In Geotechnical Special Publication (Vol. 1, pp. 3635-3644). American Society of Civil Engineers. https://doi.org/10.1061/9780784413272.352
Dunham-Friel, J.S. ; Carraro, J. Antonio. / Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures. Geotechnical Special Publication. Vol. 1 American Society of Civil Engineers, 2014. pp. 3635-3644
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abstract = "The effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures was evaluated in this study in undrained axisymmetric compression. The materials tested included an expansive soil from Loveland, Colorado; two granulated rubber samples with 4.8 or 6.7 mm nominal maximum particle size; and a 50/50 mix of broken auto glass and crushed bottle glass. The effect of compaction effort was investigated by preparing and testing identical ESR mixtures compacted to either 95{\%} of the standard or modified Proctor maximum dry densities at optimum water content. The effect of granulated rubber size was investigated by preparing and testing specimens with either 4.8 or 6.7 mm granulated rubber. The effect of inclusion stiffness was investigated by replicating the gradation of the 6.7 mm granulated rubber with two types of glass and testing an expansive soil-glass (ESG) mixture compacted to 95{\%} of the standard Proctor maximum dry density for the ESG mixture. Specimens were evaluated for strength and stiffness by performing isotropically consolidated undrained triaxial tests at a mean effective stress equal to 25 kPa. Peak and critical state friction angles increased with increasing compaction of the ESR specimens in addition to a slight increase in stiffness. The stress-strain response is shown to be similar for both sizes of granulated rubber but the 6.7 mm granulated rubber particle size resulted in slightly higher peak and critical state friction angles. The stiffness of the inclusions is shown to change the material stress-strain response and stiffness substantially. {\circledC} 2014 American Society of Civil Engineers.",
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Dunham-Friel, JS & Carraro, JA 2014, Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures. in Geotechnical Special Publication. vol. 1, American Society of Civil Engineers, pp. 3635-3644, Geo-Congress 2014, Alanta, United States, 23/02/14. https://doi.org/10.1061/9780784413272.352

Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures. / Dunham-Friel, J.S.; Carraro, J. Antonio.

Geotechnical Special Publication. Vol. 1 American Society of Civil Engineers, 2014. p. 3635-3644.

Research output: Chapter in Book/Conference paperConference paper

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AU - Carraro, J. Antonio

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N2 - The effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures was evaluated in this study in undrained axisymmetric compression. The materials tested included an expansive soil from Loveland, Colorado; two granulated rubber samples with 4.8 or 6.7 mm nominal maximum particle size; and a 50/50 mix of broken auto glass and crushed bottle glass. The effect of compaction effort was investigated by preparing and testing identical ESR mixtures compacted to either 95% of the standard or modified Proctor maximum dry densities at optimum water content. The effect of granulated rubber size was investigated by preparing and testing specimens with either 4.8 or 6.7 mm granulated rubber. The effect of inclusion stiffness was investigated by replicating the gradation of the 6.7 mm granulated rubber with two types of glass and testing an expansive soil-glass (ESG) mixture compacted to 95% of the standard Proctor maximum dry density for the ESG mixture. Specimens were evaluated for strength and stiffness by performing isotropically consolidated undrained triaxial tests at a mean effective stress equal to 25 kPa. Peak and critical state friction angles increased with increasing compaction of the ESR specimens in addition to a slight increase in stiffness. The stress-strain response is shown to be similar for both sizes of granulated rubber but the 6.7 mm granulated rubber particle size resulted in slightly higher peak and critical state friction angles. The stiffness of the inclusions is shown to change the material stress-strain response and stiffness substantially. © 2014 American Society of Civil Engineers.

AB - The effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures was evaluated in this study in undrained axisymmetric compression. The materials tested included an expansive soil from Loveland, Colorado; two granulated rubber samples with 4.8 or 6.7 mm nominal maximum particle size; and a 50/50 mix of broken auto glass and crushed bottle glass. The effect of compaction effort was investigated by preparing and testing identical ESR mixtures compacted to either 95% of the standard or modified Proctor maximum dry densities at optimum water content. The effect of granulated rubber size was investigated by preparing and testing specimens with either 4.8 or 6.7 mm granulated rubber. The effect of inclusion stiffness was investigated by replicating the gradation of the 6.7 mm granulated rubber with two types of glass and testing an expansive soil-glass (ESG) mixture compacted to 95% of the standard Proctor maximum dry density for the ESG mixture. Specimens were evaluated for strength and stiffness by performing isotropically consolidated undrained triaxial tests at a mean effective stress equal to 25 kPa. Peak and critical state friction angles increased with increasing compaction of the ESR specimens in addition to a slight increase in stiffness. The stress-strain response is shown to be similar for both sizes of granulated rubber but the 6.7 mm granulated rubber particle size resulted in slightly higher peak and critical state friction angles. The stiffness of the inclusions is shown to change the material stress-strain response and stiffness substantially. © 2014 American Society of Civil Engineers.

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M3 - Conference paper

SN - 9780784413272

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EP - 3644

BT - Geotechnical Special Publication

PB - American Society of Civil Engineers

ER -

Dunham-Friel JS, Carraro JA. Effects of compaction effort, inclusion stiffness, and rubber size on the shear strength and stiffness of expansive soil-rubber (ESR) mixtures. In Geotechnical Special Publication. Vol. 1. American Society of Civil Engineers. 2014. p. 3635-3644 https://doi.org/10.1061/9780784413272.352