Performance Of Concrete Pavement In The Presence Of Deicing Salts And Deicing Salt Cocktails
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Performance Of Concrete Pavement In The Presence Of Deicing Salts And Deicing Salt Cocktails
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Author : Prannoy Suraneni
language : en
Publisher:
Release Date : 2016-12-31
Performance Of Concrete Pavement In The Presence Of Deicing Salts And Deicing Salt Cocktails written by Prannoy Suraneni and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-31 with categories.
Deicing salts are widely used for anti-icing and de-icing operations in pavements. While historically sodium chloride may have been the deicer most commonly used, a wide range of deicing salts have begun to be used to operate at lower temperatures, to 'stick to the road better' and to improve other aspects of performance such as environmental impact or corrosion resistance. It has been observed that some chloride based deicing salts can react with the calcium hydroxide in the mixture resulting in the formation of calcium oxychloride an expansive phase that can damage concrete pavements, especially at the joints. This report describes the two main objectives of this work. First, the report documents the development a standardized approach to use low temperature differential scanning calorimetry (LT-DSC) to assess the influence of cementitious binder composition on the potential for calcium oxychloride formation. Second, this work will assess the influence of blended salt cocktails on the formation of calcium oxychloride.
Sustainable Winter Road Operations
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Author : Xianming Shi
language : en
Publisher: John Wiley & Sons
Release Date : 2018-03-27
Sustainable Winter Road Operations written by Xianming Shi and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-03-27 with Technology & Engineering categories.
The first and only comprehensive guide to best practices in winter road operations Winter maintenance operations are essential to ensure the safety, mobility, and productivity of transportation systems, especially in cold-weather climates, and responsible agencies are continually challenged to provide a high level of service in a fiscally and environmentally responsible manner. Sustainable Winter Road Operations bridges the knowledge gaps, providing the first up-to-date, authoritative, single-source overview and guide to best practices in winter road operations that considers the triple bottom line of sustainability. With contributions from experts in the field from around the world, this book takes a holistic approach to the subject. The authors address the many negative impacts on regional economies and the environment of poorly planned and inadequate winter road operations, and they make a strong case for the myriad benefits of environmentally sustainable concepts and practices. Best practice applications of materials, processes, equipment, and associated technologies and how they can improve the effectiveness and efficiency of winter operations, optimize materials usage, and minimize cost, corrosion, and environmental impacts are all covered in depth. Provides the first up-to-date, authoritative and comprehensive overview of best practices in sustainable winter road operations currently in use around the world Covers materials, processes, equipment, and associated technologies for sustainable winter road operations Brings together contributions by an international all-star team of experts with extensive experience in designing, implementing, and managing sustainable winter road operations Designed to bring professionals involved in transportation and highway maintenance and control up to speed with current best practice Sustainable Winter Road Operations is essential reading for maintenance professionals dealing with snow and ice control operations on highways, motorways and local roads. It is a valuable source of information and guidance for decision makers, researchers, and engineers in transportation engineering involved in transportation and highway maintenance. And it is an ideal textbook for advanced-level courses in transportation engineering.
Behaviour Of Concrete Pavements Exposed To De Icing Salts
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Author : A.K.M. Rakinul Islam
language : en
Publisher:
Release Date : 2017
Behaviour Of Concrete Pavements Exposed To De Icing Salts written by A.K.M. Rakinul Islam and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
In recent times signs of premature deterioration are identified in joint areas of concrete pavements. The root causes and underlying mechanisms behind this deterioration are still not fully understood but the use of de-icers has been suspected to aggravate the deterioration. Hence, this thesis aims at understanding the role of de-icer salts and identifying aspects contributing to this joint deterioration in the field. Also, it evaluates the performance of concrete containing nanoparticles to resist damaging effects of freezing-thawing actions in presence of various de-icing salts. The investigation revealed that the cores collected from deteriorated joints had high intensity of micro-cracks and most air voids were filled with various levels of secondary depositions. This is explained by a combination of physical and chemical aspects, due to the interaction of salts and freezing/thawing cycles. In laboratory study, all the nano-modified concrete specimens were able to resist the detrimental effects of freezing-thawing action.
Investigation Of Anti Icing Chemicals And Their Interactions With Pavement Concretes
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Author : Jan Olek
language : en
Publisher:
Release Date : 2016-12-31
Investigation Of Anti Icing Chemicals And Their Interactions With Pavement Concretes written by Jan Olek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-31 with categories.
The interactions of concrete specimens (both plain and with fly ash addition) with six different deicers was investigated by exposing them to solutions of sodium chloride (NaCl), magnesium chloride (MgCl2), calcium chloride (CaCl2), and the combinations of: sodium chloride with magnesium chloride (NaCl + MgCl2), sodium chloride with calcium chloride (NaCl + CaCl2), sodium chloride with agricultural by product - Ice Ban® (NaCl + Ice Ban®). In addition, control group of specimens was exposed to the deionized water. The exposures consisted of wet/dry (W/D) and freeze/thaw (F/T) cycles as well as a continuous storage in lime water at 23°C.The effects of various exposure conditions were evaluated based on the changes in the following: relative dynamic modulus of elasticity (RDME), ultrasonic pulse velocity (UPV), mass of specimens, length of specimens, mass of scaled material and compressive strength. In addition, absorption and chloride penetration measurements were performed for specimens exposed to various deicers at room temperature of 23°C. Finally, the qualitative visual evaluation of the appearance of the samples was also performed along with documentation of microstructural changes using the scanning electron microscopy (SEM).Among the deicer/anti-icers tested, calcium chloride and magnesium chloride solutions caused comparatively higher degree of deterioration than other solutions. Although the ultimate extent of visual degradation of the specimens exposed to both of these deicers was very comparable, the onset of the degradation process in specimens exposed to magnesium chloride was significantly delayed when compared to the onset of deterioration of specimens exposed to calcium chloride.The best performance (least amount of damage) was observed for specimens exposed to sodium chloride solutions followed by specimens exposed to the combination of sodium chloride with magnesium chloride and sodium chloride with calcium chloride.The test results indicate that F/T exposure conditions are much more severe than W/D regimes, even though the concentrations of deicers/anti-icers used for F/T cycles were about 50% lower than those used for W/D cycles. Moreover, the addition of fly ash has a positive influence on performance of the concrete regardless of the type of the exposure regime.
12th Phd Symposium In Prague Czech Rep
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - Féd. Int. du Béton
Release Date : 2018-08-01
12th Phd Symposium In Prague Czech Rep written by FIB – International Federation for Structural Concrete and has been published by FIB - Féd. Int. du Béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-01 with Technology & Engineering categories.
Sustainable Winter Road Operations
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Author : Xianming Shi
language : en
Publisher: John Wiley & Sons
Release Date : 2018-08-27
Sustainable Winter Road Operations written by Xianming Shi and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-27 with Technology & Engineering categories.
The first and only comprehensive guide to best practices in winter road operations Winter maintenance operations are essential to ensure the safety, mobility, and productivity of transportation systems, especially in cold-weather climates, and responsible agencies are continually challenged to provide a high level of service in a fiscally and environmentally responsible manner. Sustainable Winter Road Operations bridges the knowledge gaps, providing the first up-to-date, authoritative, single-source overview and guide to best practices in winter road operations that considers the triple bottom line of sustainability. With contributions from experts in the field from around the world, this book takes a holistic approach to the subject. The authors address the many negative impacts on regional economies and the environment of poorly planned and inadequate winter road operations, and they make a strong case for the myriad benefits of environmentally sustainable concepts and practices. Best practice applications of materials, processes, equipment, and associated technologies and how they can improve the effectiveness and efficiency of winter operations, optimize materials usage, and minimize cost, corrosion, and environmental impacts are all covered in depth. Provides the first up-to-date, authoritative and comprehensive overview of best practices in sustainable winter road operations currently in use around the world Covers materials, processes, equipment, and associated technologies for sustainable winter road operations Brings together contributions by an international all-star team of experts with extensive experience in designing, implementing, and managing sustainable winter road operations Designed to bring professionals involved in transportation and highway maintenance and control up to speed with current best practice Sustainable Winter Road Operations is essential reading for maintenance professionals dealing with snow and ice control operations on highways, motorways and local roads. It is a valuable source of information and guidance for decision makers, researchers, and engineers in transportation engineering involved in transportation and highway maintenance. And it is an ideal textbook for advanced-level courses in transportation engineering.
Concrete Pavement Repair Manuals Of Practice
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Author : Lynn D. Evans
language : en
Publisher:
Release Date : 1993
Concrete Pavement Repair Manuals Of Practice written by Lynn D. Evans and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Technology & Engineering categories.
Effects Of Substances On Concrete And Guide To Protective Treatments
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Author :
language : en
Publisher:
Release Date : 1981
Effects Of Substances On Concrete And Guide To Protective Treatments written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Concrete categories.
Concrete Microstructure Properties And Materials
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Author : P. Mehta
language : en
Publisher: McGraw Hill Professional
Release Date : 2005-09-26
Concrete Microstructure Properties And Materials written by P. Mehta and has been published by McGraw Hill Professional this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-09-26 with Technology & Engineering categories.
This textbook presents the art and science of concrete in a simple, clear, hands-on manner, focusing on the following: Cement and concrete are predicted to be the premier building material of the 21st Century; Includes unique diagrams, photographs, and summary tables; Updated to include new chapters on non-destructive methods for concrete; future challenges in concrete technology; an increased number of examples of concrete applications; and new developments in durability.
Ultra High Performance Concrete
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Author : Ekkehard Fehling
language : en
Publisher: kassel university press GmbH
Release Date : 2008-01-01
Ultra High Performance Concrete written by Ekkehard Fehling and has been published by kassel university press GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-01 with High strength concrete categories.