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Incorporating Chemical Stabilization Of The Subgrade In Pavement Design And Construction Practices
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Book Synopsis Incorporating Chemical Stabilization of the Subgrade in Pavement Design and Construction Practices by : Anwer K. Al-Jhayyish
Download or read book Incorporating Chemical Stabilization of the Subgrade in Pavement Design and Construction Practices written by Anwer K. Al-Jhayyish and published by . This book was released on 2014 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were to determine how to incorporate the increase in stiffness of stabilized subgrade in the design of (Flexible?) pavement, and to examine the longevity of subgrade stabilization. Pavement sites that included stabilized subgrade across the state of Ohio were selected for field measurements. The field work included measurements made with portable seismic properties analyzer (PSPA), falling weight deflectometer (FWD), core collection, and dynamic cone penetrometer (DCP) at multiple locations at each site. Original construction records, soil logs, and soil classification data were consulted as well. The FWD and DCP data were used to determine the resilient moduli and layer coefficients of aggregate base and stabilized subgrade and the resilient modulus of the unstabilized subgrade. Several methods of data analysis were used, including back calculation using finite element modeling from the FWD data and estimation of modulus from the DCP data and soil classification using procedures given in the 1993 AASHTO Guide for Design of Pavement Structures, ODOT's Pavement Design Manual, and a report for ODOT written by Eddie Chou [2004]. As borne out by FWD and DCP measurements, both cement stabilization and lime stabilization resulted in significant long term increases in the modulus of the stabilized subgrade relative to the unstabilized subgrade. The modulus and stiffness of the base is also increased because it is confined by the stabilized soil underneath and the pavement on top. The significant increase in the modulus of the base and stabilized subgrade has an impact on the thickness design of pavement.
Book Synopsis Incorporating Chemical Stabilization of the Subgrade in Pavement Design and Construction Practices by : Shad M. Sargand
Download or read book Incorporating Chemical Stabilization of the Subgrade in Pavement Design and Construction Practices written by Shad M. Sargand and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were to determine how to incorporate the increase in stiffness of stabilized subgrade in the design of (Flexible?) pavement, and to examine the longevity of subgrade stabilization. Pavement sites that included stabilized subgrade across the state of Ohio were selected for field measurements. The field work included measurements made with portable seismic properties analyzer (PSPA), falling weight deflectometer (FWD), core collection, and dynamic cone penetrometer (DCP) at multiple locations at each site. Original construction records, soil logs, and soil classification data were consulted as well. The FWD and DCP data were used to determine the resilient moduli and layer coefficients of aggregate base and stabilized subgrade and the resilient modulus of the unstabilized subgrade. Several methods of data analysis were used, including back calculation using finite element modeling from the FWD data and estimation of modulus from the DCP data and soil classification using procedures given in the 1993 AASHTO Guide for Design of Pavement Structures, ODOT's Pavement Design Manual, and a report for ODOT written by Eddie Chou [2004]. As borne out by FWD and DCP measurements, both cement stabilization and lime stabilization resulted in significant long term increases in the modulus of the stabilized subgrade relative to the unstabilized subgrade. The modulus and stiffness of the base is also increased because it is confined by the stabilized soil underneath and the pavement on top. The significant increase in the modulus of the base and stabilized subgrade has an impact on the thickness design of pavement.
Book Synopsis Soil Stabilization in Pavement Structures: Pavement design and construction considerations by : Terrel, Epps, and Associates
Download or read book Soil Stabilization in Pavement Structures: Pavement design and construction considerations written by Terrel, Epps, and Associates and published by . This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stabilization of Existing Subgrades to Improve Constructibility During Interstate Pavement Reconstruction by : Joakim G. Laguros
Download or read book Stabilization of Existing Subgrades to Improve Constructibility During Interstate Pavement Reconstruction written by Joakim G. Laguros and published by . This book was released on 1997 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to state department of transportation (DOT) construction, geotechnical, materials, and pavement system design engineers, engineering geologists, and research engineers, and others concerned with the constructibility of new pavements over existing subgrades. The synthesis describes current practice for the stabilization of existing subgrades to improve constructibility during interstate pavement reconstruction. It presents information regarding the methods available to evaluate and improve subgrade conditions for the purpose of meeting the constructibility requirements of a reconstruction project. This report of the Transportation Research Board presents data obtained from a review of the literature and a survey of the state DOTs. The synthesis reports on: subgrade evaluation methods including sampling, laboratory, and in-situ test methods, as well as assessment of existing drainage systems; constructibility factors such as existing and proposed pavement types, available equipment, and cost effectiveness of various subgrade stabilization techniques; methods of subgrade improvement including mechanical and chemical stabilization, use of recycled and waste materials, the use of geosynthetics in reinforcement and drainage applications; and construction methods with an emphasis on innovative approaches such as novel sequencing of construction traffic, use of lightweight equipment, and robotics. In addition, several case histories describing applicable pavement reconstruction projects are presented. Finally, suggestions to possibly improve the practice and the identification of research needs are also presented.
Book Synopsis Handbook for Stabilization of Pavement Subgrades and Base Courses with Lime by : Dallas N. Little
Download or read book Handbook for Stabilization of Pavement Subgrades and Base Courses with Lime written by Dallas N. Little and published by . This book was released on 1995 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Developments in Pavement Design, Modeling and Performance by : Sherif El-Badawy
Download or read book Recent Developments in Pavement Design, Modeling and Performance written by Sherif El-Badawy and published by Springer. This book was released on 2018-10-30 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes a collection of research and practical papers from an international research and technology activities on recent developments in pavement design, modeling and performance, and effects on infrastructure, green energy, technology and integration. Sustainability is increasingly a key priority in engineering practices. With the aging transportation infrastructure and renewed emphasis on infrastructure renovation by transportation agencies, innovations are urgently needed to develop materials, designs, and practices to ensure the sustainability of transportation infrastructure. The volume is based on the best contributions to the 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 – The official international congress of the Soil-Structure Interaction Group in Egypt (SSIGE).
Book Synopsis Bearing Capacity of Roads, Railways and Airfields by : Andreas Loizos
Download or read book Bearing Capacity of Roads, Railways and Airfields written by Andreas Loizos and published by CRC Press. This book was released on 2017-07-20 with total page 3209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bearing Capacity of Roads, Railways and Airfields includes the contributions to the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA 2017, 28-30 June 2017, Athens, Greece). The papers cover aspects related to materials, laboratory testing, design, construction, maintenance and management systems of transport infrastructure, and focus on roads, railways and airfields. Additional aspects that concern new materials and characterization, alternative rehabilitation techniques, technological advances as well as pavement and railway track substructure sustainability are included. The contributions discuss new concepts and innovative solutions, and are concentrated but not limited on the following topics: · Unbound aggregate materials and soil properties · Bound materials characteritics, mechanical properties and testing · Effect of traffic loading · In-situ measurements techniques and monitoring · Structural evaluation · Pavement serviceability condition · Rehabilitation and maintenance issues · Geophysical assessment · Stabilization and reinforcement · Performance modeling · Environmental challenges · Life cycle assessment and sustainability Bearing Capacity of Roads, Railways and Airfields is essential reading for academics and professionals involved or interested in transport infrastructure systems, in particular roads, railways and airfields.
Book Synopsis Evaluation of Chemical Stabilization and Incorporation Into Pavement Design by :
Download or read book Evaluation of Chemical Stabilization and Incorporation Into Pavement Design written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime Stabilization written by and published by Transportation Research Board National Research. This book was released on 1987 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many years, various forms of lime, including products with varying degrees of purity, have been utilized successfully as soil stablizing agents. The state of the art in lime treatment based on a comprehensive analysis of current practice and technical literature is presented in this report. References are included for more information.
Book Synopsis Soil Stabilization in Pavement Structures: Pavement design and construction considerations by : Terrel, Epps, and Associates
Download or read book Soil Stabilization in Pavement Structures: Pavement design and construction considerations written by Terrel, Epps, and Associates and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide for Pavement Friction written by and published by AASHTO. This book was released on 2008 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560510552 Total Pages :622 pages Book Rating :4.5/5 (65 download)
Book Synopsis AASHTO Guide for Design of Pavement Structures, 1993 by : American Association of State Highway and Transportation Officials
Download or read book AASHTO Guide for Design of Pavement Structures, 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Book Synopsis Hydraulic Road Binder (HRB) and Its Use for Subgrade Stabilization in Ontario, Canada by : Shenglin Wang
Download or read book Hydraulic Road Binder (HRB) and Its Use for Subgrade Stabilization in Ontario, Canada written by Shenglin Wang and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The term "subgrade" refers to the in-situ material composed of natural soil located underneath the pavement structural layers. The quality of natural subgrade is highly influenced by soil type, moisture content, and organic content. Furthermore, the failure of subgrade soils may lead to severe pavement distresses including rutting, potholes, and cracking. In order to enhance the subgrade engineering properties, a variety of stabilization methods have been developed. One of the most popular and cost-effective methods is in-situ subgrade soil stabilization using hydraulic binders. In-field soil modification and stabilization frequently use Portland cement as the chemical additive. Such method significantly enhances the engineering characteristics of soils in terms of plasticity, strength, stiffness, and durability. Despite the advantages, the chemical mixing also brings some disadvantages including rapid setting, drying shrinkage cracking, and higher cost. Recently, Supplementary Cementitious Materials (SCMs) made of by-products and industrial secondary materials (e.g. granulated blast furnace slag, cement kiln dust and fly ash) have been studied extensively to reduce the use of cement. Hydraulic Road Binder (HRB) is a European specified material designed for treatment of road bases, subbases as well as earthworks. HRB contains both cement clinker and a substantial amount of SCMs. Therefore, the use of HRBs has the potential to be more cost-effective and environmentally friendly than Portland cement. However, the research and application of HRB is new in Canada. The study started with an investigation of cement and different formulated HRBs in the form of paste and mix (mortar). Then, selected HRBs were used to evaluate their impacts on the chemical and physical properties of three local subgrade soils. In addition, a field application of weak subgrade stabilization using cement was introduced. Lastly, a study aiming to predict the long-term pavement performance was conducted in order to simulate the impact of stabilized subgrade in pavement design. The research findings are summarized as follows: • HRBs were found to reduce the setting time, reduce the speed of hydration, and the hydration temperature compared to Portland cement. The hydration products in hydrated HRBs and Portland cements were generally the same, but their contents were different. In addition, a reduction of drying shrinkage was observed in HRB mortars especially in those containing substantial SCMs. Regarding the strength, several HRB mortars had equivalent strength as cement mortars after 28 days of curing. Furthermore, a linear correlation was found between the compressive strength and flexible strength. Statistical analysis further revealed that the strength of HRB mix highly correlated to the content of GU, GUL, and GGBFS. • All the three subgrade soils (named Dresden, Blenheim, and Niagara) were fine-grained soils with substantial silt- and clay- sized particles. Ignition test indicated that all the three soils include high content of organic matters. In particular, Niagara soil with high plasticity, high organic material content had lower strength and modulus compared to the other two soils. Using the stabilizers, the soil's pH values increased to around 12 and above. In addition, significant improvement had been observed in stabilized soils in terms of strength, durability, and resilient modulus. Nevertheless, the clay particles and organic matters inhibited the treatment. Increase of stabilizer content further promoted improvement. In particular, HRB-4LS had the best stabilization effect followed by GU, HRB-4LF, and HRB-3S. On the other hand, HRB-2S and HRB-3C treated soils had lower strength and modulus values. Finally, statistical analysis indicated that soil's UCS values correlated with binder strength, binder content, curing, and untreated soil's strength. • Field testing indicated that the workability and conditions of subgrade were significantly improved by hydraulic binder. Moreover, the modulus of subgrade surface further increased with curing time. After one year of service, the conditions of roads were good in most test sections. Furthermore, long-term pavement performance prediction (LTPP) revealed the feasibility of using cement and HRB stabilized subgrade to reduce the thickness of subbase layer. In terms of international roughness index and subgrade deformation, pavements constructed with HRB stabilized subgrade materials had equivalent performance as cement treated one over their design life. To summarize, this study focused on evaluating the used of Hydraulic Road Binders formulated in Canada for pavement subgrade stabilization. The research showed that HRB mortars have similar or slightly better strength compared to Portland cement alone with sufficient curing time. Moreover, The HRB improved subgrade soils were shown to perform adequately using several HRB types. In addition, the use of HRB-stabilized subgrade in pavement structure would improve the LTPP of pavement. Therefore, the use of HRB in the subgrade stabilization could be a promising solution in pavement construction due to its equivalent performance and with the potential environmental and cost advantages.
Book Synopsis Soil Stabilization with Cement and Lime by : Philip Thomas Sherwood
Download or read book Soil Stabilization with Cement and Lime written by Philip Thomas Sherwood and published by Stationery Office Books (TSO). This book was released on 1993 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil stabilization is the process whereby soils and related materials are made stronger and more durable by mixing with a stabilizing agent. These techniques are used for road construction in most parts of the world, although the circumstances and reasons for resorting to stabilization vary considerably.
Book Synopsis Guide to Cement-treated Base (CTB) by : Gregory E. Halsted
Download or read book Guide to Cement-treated Base (CTB) written by Gregory E. Halsted and published by . This book was released on 2006 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement-treated base (CTB) is a general term that applies to an mixture of native soils and/or manufactured aggregates with measured amounts of portland cement and water that is compacted and cured to form a strong, durable, frost resistant paving material. Other descriptions such as soil-cement base, cement-treated aggregate base, cement-stabilized base are sometimes used. This document provides a basic guide on the use of cement-treated base (CTB) for pavement applications. This document provides on overview on the design and construction of CTB for both mixed-in-place and central plant mixed operations. A suggested construction specification is also included.
Book Synopsis Stabilization of Existing Subgrades to Improve Constructibility During Interstate Pavement Reconstruction by :
Download or read book Stabilization of Existing Subgrades to Improve Constructibility During Interstate Pavement Reconstruction written by and published by . This book was released on 1997 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This synthesis will be of interest to state department of transportation (DOT) construction, geotechnical, materials, and pavement system design engineers, engineering geologists, and research engineers, and others concerned with the constructibility of new pavements over existing subgrades. The synthesis describes current practice for the stabilization of existing subgrades to improve constructibility during interstate pavement reconstruction. It presents information regarding the methods available to evaluate and improve subgrade conditions for the purpose of meeting the constructibility requirements of a reconstruction project."--Avant-propos.
Book Synopsis Pavement Design and Materials by : A. T. Papagiannakis
Download or read book Pavement Design and Materials written by A. T. Papagiannakis and published by John Wiley & Sons. This book was released on 2017-02-22 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art guide to pavement design and materials With innovations ranging from the advent of SuperpaveTM, the data generated by the Long Term Pavement Performance (LTPP) project, to the recent release of the Mechanistic-Empirical pavement design guide developed under NCHRP Study 1-37A, the field of pavement engineering is experiencing significant development. Pavement Design and Materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis. Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway pavements. This book focuses on the best-established, currently applicable techniques available. Pavement Design and Materials offers complete coverage of: The characterization of traffic input The characterization of pavement bases/subgrades and aggregates Asphalt binder and asphalt concrete characterization Portland cement and concrete characterization Analysis of flexible and rigid pavements Pavement evaluation Environmental effects on pavements The design of flexible and rigid pavements Pavement rehabilitation Economic analysis of alternative pavement designs The coverage is accompanied by suggestions for software for implementing various analytical techniques described in these chapters. These tools are easily accessible through the book’s companion Web site, which is constantly updated to ensure that the reader finds the most up-to-date software available.
