Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand

Soil characteristics are paramount to design pavements and to assess the economic viability of a road. In the desert, such as that found in southern Libya, the very poor quality of soils leads to important pavement distress such as cracks, rutting, potholes, and lateral shear failure on the edges. T...

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Autores principales:	Talal S. Amhadi, Gabriel J. Assaf
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cement fly ash pavement construction UCS soil stabilization CBR Technology T
Acceso en línea:	https://doaj.org/article/fdbe5cd5c5374cf59ac2dce00601b943
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spelling	oai:doaj.org-article:fdbe5cd5c5374cf59ac2dce00601b9432021-11-25T17:58:49ZImprovement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand10.3390/infrastructures61101512412-3811https://doaj.org/article/fdbe5cd5c5374cf59ac2dce00601b9432021-10-01T00:00:00Zhttps://www.mdpi.com/2412-3811/6/11/151https://doaj.org/toc/2412-3811Soil characteristics are paramount to design pavements and to assess the economic viability of a road. In the desert, such as that found in southern Libya, the very poor quality of soils leads to important pavement distress such as cracks, rutting, potholes, and lateral shear failure on the edges. To improve the strength of desert sand, an innovative approach is proposed, consisting of adding manufactured sand, ordinary Portland cement (OPC), and fly ash (FA) as a binder. OPC and FA improve the characteristics of mixes of crushed fine aggregate (CFA) and natural desert sand (NDS). These results are based on a gradation of two sand sources to determine the particle distribution and X-ray fluorescence (XRF) to determine their chemical and physical properties, respectively. This research assesses the effect of cement and fly ash on the geotechnical behavior of two mixtures of fine desert and manufactured sands (30:70% and 50:50%). The mix composed of 26% of CFA, 62% of NDS, 5% of OPC, and 7% of FA shows optimal results in terms of strength, compaction, and bearing capacity characteristics.Talal S. AmhadiGabriel J. AssafMDPI AGarticlecementfly ashpavement constructionUCSsoil stabilizationCBRTechnologyTENInfrastructures, Vol 6, Iss 151, p 151 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cement fly ash pavement construction UCS soil stabilization CBR Technology T
spellingShingle	cement fly ash pavement construction UCS soil stabilization CBR Technology T Talal S. Amhadi Gabriel J. Assaf Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
description	Soil characteristics are paramount to design pavements and to assess the economic viability of a road. In the desert, such as that found in southern Libya, the very poor quality of soils leads to important pavement distress such as cracks, rutting, potholes, and lateral shear failure on the edges. To improve the strength of desert sand, an innovative approach is proposed, consisting of adding manufactured sand, ordinary Portland cement (OPC), and fly ash (FA) as a binder. OPC and FA improve the characteristics of mixes of crushed fine aggregate (CFA) and natural desert sand (NDS). These results are based on a gradation of two sand sources to determine the particle distribution and X-ray fluorescence (XRF) to determine their chemical and physical properties, respectively. This research assesses the effect of cement and fly ash on the geotechnical behavior of two mixtures of fine desert and manufactured sands (30:70% and 50:50%). The mix composed of 26% of CFA, 62% of NDS, 5% of OPC, and 7% of FA shows optimal results in terms of strength, compaction, and bearing capacity characteristics.
format	article
author	Talal S. Amhadi Gabriel J. Assaf
author_facet	Talal S. Amhadi Gabriel J. Assaf
author_sort	Talal S. Amhadi
title	Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
title_short	Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
title_full	Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
title_fullStr	Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
title_full_unstemmed	Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand
title_sort	improvement of pavement subgrade by adding cement and fly ash to natural desert sand
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fdbe5cd5c5374cf59ac2dce00601b943
work_keys_str_mv	AT talalsamhadi improvementofpavementsubgradebyaddingcementandflyashtonaturaldesertsand AT gabrieljassaf improvementofpavementsubgradebyaddingcementandflyashtonaturaldesertsand
_version_	1718411780298899456

Improvement of Pavement Subgrade by Adding Cement and Fly Ash to Natural Desert Sand

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