A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of an Expansive Soil in Southwest Brazilian Amazon—Behavior of an Expansive Subgrade in a Flexible Pavement
https://orcid.org/http://orcid.org/0000-0002-9476-7995
https://orcid.org/http://orcid.org/0000-0001-8936-2777
https://orcid.org/http://orcid.org/0000-0001-9244-7034
https://orcid.org/http://orcid.org/0000-0001-5514-718X
The main geotechnical aspects of the southwestern Brazilian Amazon are the absence of rocks to provide gravel for pavements and the widespread occurrence of expansive soils along the natural subgrade, associated with high rainfall indices. Although most of the local soils are rich in 2:1 clay minerals and amorphous material originated from Andes volcanic ashes—which is quite different from other Amazonian soils—geotechnical studies about the behavior of these materials are still very limited. The high volumetric variation of these expansive soils has been causing financial losses and making transportation by land difficult in the region. This paper presents the case study of a pavement built over expansive subgrade in Rio Branco city, state capital of Acre. Disturbed and undisturbed samples were collected in order to evaluate the swelling parameters of the soil. A suction-based model from Texas A&M University was used to predict pavement roughness caused by both expansive soils and traffic. The results showed the high swelling potential of the samples and the importance of developing a methodology for the control of expansive soils when building over these materials at the studied site.
Characterization of an Expansive Soil in Southwest Brazilian Amazon—Behavior of an Expansive Subgrade in a Flexible Pavement
https://orcid.org/http://orcid.org/0000-0002-9476-7995
https://orcid.org/http://orcid.org/0000-0001-8936-2777
https://orcid.org/http://orcid.org/0000-0001-9244-7034
https://orcid.org/http://orcid.org/0000-0001-5514-718X
The main geotechnical aspects of the southwestern Brazilian Amazon are the absence of rocks to provide gravel for pavements and the widespread occurrence of expansive soils along the natural subgrade, associated with high rainfall indices. Although most of the local soils are rich in 2:1 clay minerals and amorphous material originated from Andes volcanic ashes—which is quite different from other Amazonian soils—geotechnical studies about the behavior of these materials are still very limited. The high volumetric variation of these expansive soils has been causing financial losses and making transportation by land difficult in the region. This paper presents the case study of a pavement built over expansive subgrade in Rio Branco city, state capital of Acre. Disturbed and undisturbed samples were collected in order to evaluate the swelling parameters of the soil. A suction-based model from Texas A&M University was used to predict pavement roughness caused by both expansive soils and traffic. The results showed the high swelling potential of the samples and the importance of developing a methodology for the control of expansive soils when building over these materials at the studied site.
Characterization of an Expansive Soil in Southwest Brazilian Amazon—Behavior of an Expansive Subgrade in a Flexible Pavement
https://orcid.org/http://orcid.org/0000-0002-9476-7995
https://orcid.org/http://orcid.org/0000-0001-8936-2777
https://orcid.org/http://orcid.org/0000-0001-9244-7034
https://orcid.org/http://orcid.org/0000-0001-5514-718X
The main geotechnical aspects of the southwestern Brazilian Amazon are the absence of rocks to provide gravel for pavements and the widespread occurrence of expansive soils along the natural subgrade, associated with high rainfall indices. Although most of the local soils are rich in 2:1 clay minerals and amorphous material originated from Andes volcanic ashes—which is quite different from other Amazonian soils—geotechnical studies about the behavior of these materials are still very limited. The high volumetric variation of these expansive soils has been causing financial losses and making transportation by land difficult in the region. This paper presents the case study of a pavement built over expansive subgrade in Rio Branco city, state capital of Acre. Disturbed and undisturbed samples were collected in order to evaluate the swelling parameters of the soil. A suction-based model from Texas A&M University was used to predict pavement roughness caused by both expansive soils and traffic. The results showed the high swelling potential of the samples and the importance of developing a methodology for the control of expansive soils when building over these materials at the studied site.
Characterization of an Expansive Soil in Southwest Brazilian Amazon—Behavior of an Expansive Subgrade in a Flexible Pavement
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Nazarian, Soheil (editor) / Al-Qadi, Imad (editor) / Qamhia, Issam I.A. (editor) / Barbosa, Victor Hugo Rodrigues (author) / Marques, Maria Esther Soares (author) / Guimarães, Antônio Carlos Rodrigues (author) / Castro, Carmen Dias (author)
2021-09-17
13 pages
Article/Chapter (Book)
Electronic Resource
English
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