Download or read book The Relationship Between Air Voids and Permeability Rate of Porous Asphalt Pavement written by Azfarina Mohd. Akhir and published by . This book was released on 2014 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationship of Air Voids Lift Thickness and Permeability in Hot Mix Asphalt Pavements written by E. Ray Brown and published by Transportation Research Board. This book was released on 2004 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 531: Relationship of Air Voids, Lift Thickness, and Permeability in Hot-Mix Asphalt Pavements provides guidance for hot-mix asphalt pavement construction designed to achieve satisfactory levels of in-place air voids and permeability. This guidance was developed from the findings of a research project that examined the relationship of air voids content to permeability and hot-mix asphalt lift thickness. The full finding of the research were published as NCHRP Web Document 68"--Publisher's description.
Download or read book NCHRP Report 531 written by Transportation Research Board and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Relationship of Air Voids Lift Thickness and Permeability in Hot Mix Asphalt Pavements written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Porous Pavements written by Bruce Ferguson and published by CRC Press. This book was released on 2005-02-18 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavements are the most ubiquitous of all man-made structures, and they have an enormous impact on environmental quality. They are responsible for hydrocarbon pollutants, excess runoff, groundwater decline and the resulting local water shortages, temperature increases in the urban "heat island," and for the ability of trees to extend their roots in
Download or read book Effects of Air Voids Content on the Performance of Porous Asphalt Pavement written by Noraziela Rahmat and published by . This book was released on 2014 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Recycled Plastics in Eco efficient Concrete written by F. Pacheco-Torgal and published by Woodhead Publishing. This book was released on 2018-11-21 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of Recycled Plastics in Eco-efficient Concrete looks at the processing of plastic waste, including techniques for separation, the production of plastic aggregates, the production of concrete with recycled plastic as an aggregate or binder, the fresh properties of concrete with plastic aggregates, the shrinkage of concrete with plastic aggregates, the mechanical properties of concrete with plastic aggregates, toughness of concrete with plastic aggregates, modulus of elasticity of concrete with plastic aggregates, durability of concrete with plastic aggregates, concrete plastic waste powder with enhanced neutron radiation shielding, and more, thus making it a valuable reference for academics and industrial researchers. - Describes the main types of recycled plastics that can be applied in concrete manufacturing - Presents, for the first time, state-of-the art knowledge on the properties of conventional concrete with recycled plastics - Discusses the technological challenges for concrete manufactures for mass production of recycled concrete from plastic waste
Download or read book A Study of Physical Factors Affecting the Durability of Asphaltic Pavements written by William Henry Gotolski and published by . This book was released on 1969 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Probabilistic Analysis of Air Void Structure and Its Relationship to Permeability and Moisture Damage of Hot Mix Asphalt written by Adhara Castelblanco Torres and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The permeability of hot mix asphalt (HMA) is of special interest to engineers and researchers due to the effects that water has on asphalt pavement performance. Significant research has been done to study HMA permeability. However, most of the studies primarily focused on relating permeability to the average percent air voids in the mix. Such relationships cannot predict permeability accurately due to the different distributions of air void structures at a given average percent of air voids. Air void distribution is a function of many factors such as mix design, compaction method, and aggregate properties. Recent advances in X-ray computed tomography and image analysis techniques offer a unique opportunity to better quantify the air void structure and, consequently, predict HMA permeability. This study is focused on portraying permeability as a function of air void size distribution by using a probabilistic approach that was previously developed by Garcia Bengochea for soils. This approach expresses permeability as a function of the probability density function (pdf) of the air void size distribution. Equations are derived in this thesis to describe this relationship for laboratory specimens compacted using the linear kneading compactor (LKC) and Superave[superscript]TM gyratory compactor (SGC) as well as for field cores (labeled as MS). A good correlation exists between permeability and the pdf of the air voids that formed the flow paths (i.e. connected voids). The relationship between moisture damage, air void structure, and cohesive and adhesive bond energy is also investigated in this study. Moisture damage is evaluated by monitoring changes in mechanical properties due to moisture conditioning. The influence of air void structure on pore pressure is studied using a recently developed program at Texas A & M University that simulates fluid flow and pore pressure in a porous medium. The surface free energy of the aggregates and asphalt are calculated from laboratory measurements using the Universal Sorption Device (USD) and the Wilhelmy Plate method, respectively, in order to test the compatibility of the aggregates with the asphalt in the presence of water.
Download or read book NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF MOISTURE TRANSPORT IN ASPHALT MIXTURES written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Water in the asphalt pavement is highly concerning, as it often causes the debonding between asphalt film and aggregate surface or early rutting/fatigue cracking because of reduced mix strength. Moisture transport is the processes that occurs when moisture in liquid or vapor state infiltrates the asphalt binder, through the interface of binder-aggregate, and the asphalt mixture. This dissertation investigated the water permeability of asphalt mixtures in vertical direction, and effect of moisture conditioning on asphalt mixtures. Additionally, relationships between coefficient of permeability, porosity, and air void content of fine-graded hot-mix asphalt were studied. The coefficient of permeability increases as the air void and porosity values increase. After the second moisture conditioning, it was observed that specimens have a reduced porosity and coefficient of permeability. In addition, this dissertation predicted the coefficient of permeability of asphalt mixtures using the Lattice Boltzmann Method (LBM). The numerical method was verified by simulating fluid flow in Poiseuille flow, parallel tubes, and sandstone samples. The experimental results and simulation results were very similar. The LBM can be a powerful tool to understand the fluid flow in asphalt mixtures. Coefficients of permeability in three different directions (longitudinal, transverse and vertical direction) were also studied. The studied asphalt mixtures were isotropic in two horizontal directions (x- and y- directions) and anisotropic comparing horizontal and vertical directions. The coefficients of permeability in horizontal directions were about two times than that in vertical direction. Image analysis techniques were used to analyze X-ray CT images of asphalt mixtures and obtain their effective percent air voids, average void diameter, Euler number, degree of anisotropy, specific surface area, and tortuosity. Pearson's correlation coefficients were used to evaluate the correlation between the selected parameters. The air void content, connected air void, and average void diameter were highly correlated with the coefficients of permeability, which were valuable to understand the fluid flow properties in asphalt mixtures.
Download or read book Proceedings of the 5th International Symposium on Asphalt Pavements Environment APE written by Marco Pasetto and published by Springer Nature. This book was released on 2019-08-29 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of asphalt pavement technology, as presented by leading international researchers and engineers at the 5th International Symposium on Asphalt Pavements & Environment (ISAP 2019 APE Symposium), held in Padua, Italy on September 11-13, 2019. It covers a diverse range of topics concerning materials and technologies for asphalt pavements, designed for sustainability and environmental compatibility: sustainable pavement materials, marginal materials for asphalt pavements, pavement structures, testing methods and performance, maintenance and management methods, urban heat island mitigation, energy harvesting, and Life Cycle Assessment. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster multidisciplinary collaboration among different specialists.
Download or read book Asphalt Materials Science and Technology written by James G. Speight and published by Butterworth-Heinemann. This book was released on 2015-10-01 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt is a complex but popular civil engineering material. Design engineers must understand these complexities in order to optimize its use. Whether or not it is used to pave a busy highway, waterproof a rooftop or smooth out an airport runway, Asphalt Materials Science and Technology acquaints engineers with the issues and technologies surrounding the proper selection and uses of asphalts. With this book in hand, researchers and engineering will find a valuable guide to the production, use and environmental aspect of asphalt. - Covers the Nomenclature and Terminology for Asphalt including: Performance Graded (PG) Binders, Asphalt Cement (AC), Asphalt-Rubber (A-R) Binder, Asphalt Emulsion and Cutback Asphalt - Includes Material Selection Considerations, Testing, and applications - Biodegradation of Asphalt and environmental aspects of asphalt use
Download or read book Investigating the Relationship of As Constructed Asphalt Pavement Air Voids to Pavement Performance written by and published by . This book was released on 2021 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several controlled laboratory studies have shown that air voids (AV) can have a large effect on the performance of asphalt pavements. AVs that are either too high or too low can cause a reduction in pavement life. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 299: Investigating the Relationship of As-Constructed Asphalt Pavement Air Voids to Pavement Performance determines the effect of in-place AVs on the performance of asphalt concrete (AC) pavements.The document also has supplemental appendices that are available by request to Ed Harrigan at [email protected]. They include data sets for LTPP, Pavement ME Design Validation, MnROAD Validation, and NCAT Validation.
Download or read book Report on Pervious Concrete written by ACI Committee 522 and published by . This book was released on 2010 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report provides technical information on pervious concrete's application, design methods, materials, properties, mixture proportioning, construction methods, testing, and inspection. The term 'pervious concrete' typically describes a near-zero-slump, open-graded material consisting of portland cement, coarse aggregate, little or no fine aggregate, admixtures, and water." [p. 1]
Download or read book A Method for Measuring the Air Permeabilities of Asphalt Concrete Pavements written by W. H. Ellis and published by . This book was released on 1961 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The permeability of asphalt-concrete pavements to air and water appears to be a primary factor in controlling pavement durability. Early investigators (Hveem (1) and McKesson (2)) were concerned with obtaining permeabilities low enough to prevent liquid water from entering the base but, at the same time, high enough to allow water vapor to escape. Pfeiffer (3) and a few others have shown the main cause of pavement hardening to be the action of oxygen from the atmosphere. He has also shown that the influence of air is dependent on the voids content at the time of construction. In this case, the permeability of the pavements is proportional to the voids content. More recently, Ekse and Zia (4) proposed using permeability for construction control and discussed the importance of permeability with respect to durability. They described a method for measuring air permeabilities of pavement cores and suggested that their equipment could be adapted to measure the permeability of pavements in place. The device works on the principle of a decaying pressure as air flows through the pavement. McLaughlin and Goetz (5) have also devised a method for measuring air permeability of pavement cores. With it, they have studied the relationship between permeability and a laboratory durability test (loss in sonic modulus caused by alternate freezing and thawing). They found a correlation between voids and permeability and showed that asphalt content, compactive effort, and aggregate gradation are factors affecting permeability.
Download or read book Civil Architecture and Environmental Engineering Volume 1 written by Jimmy C.M. Kao and published by CRC Press. This book was released on 2017-07-12 with total page 2049 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2016 International Conference on Civil, Architecture and Environmental Engineering (ICCAE 2016), November 4-6, 2016, Taipei, Taiwan, is organized by China University of Technology and Taiwan Society of Construction Engineers, aimed to bring together professors, researchers, scholars and industrial pioneers from all over the world. ICCAE 2016 is the premier forum for the presentation and exchange of experience, progress and research results in the field of theoretical and industrial experience. The conference consists of contributions promoting the exchange of ideas between researchers and educators all over the world.
