PDH Online Engineer Gravel Roads Maintenance and Design
PDH Online Engineer Gravel Roads Maintenance and Design http://www.thoughts.com/tom47engineering/pdh-online-engineer-gravel-roads-maintenance-and-design * PDH Online Engineer Gravel Roads Mainten... * CE engineering * Electrical Systems EngineerCE.com Gravel Roads - Maintainence and Design Course No. CE0003 PDH: 5 PDH Online Engineering Continuing Education courses - EngineerCE.com CE engineer, PE Renewal and more Course Summary & Description: This manual categorizes the importance of gravel roads within our transportation network system and details the design criteria and maintenance required to preserve its functionality for continued use. In the United States, more than one half of all the road network systems are unpaved and in some countries, unpaved / gravel roads constitutes the majority of the road network system. This manual not only gives design guidance on the proper maintenance of a gravel road, but also details the required equipment, materials, design criteria and problematic issues associated with unpaved roads. The rehabilitation process of existing gravel road is not complex; however, several critical issues must be addressed in order to obtain a suitable design cross-section that would limit maintenance and extend the service life of the system. This manual provides several design examples, together with resolutions for the most common and problematic maintenance issue: drainage. Material specifications and testing procedures is elaborated within the manual and emphasis on stabilization and innovation is provided for the user. The information in this manual is specifically presented in a non-technical format with familiar "local" terminology provided for maintenance personnel as well as the everyday user. Course Objectives: * Routine Maintenance and Rehabilitation Download Course Material: (Available Now) http://engineerce.com/summary-detail.php?c_id=54&p_id= Definition of Terms Articulation: As used in this manual, it refers to a machine with a jointed main frame. This assists in steering the machine, allowing it to work in an angled configuration, yet move forward in a straight line. Ballast: Extra weight added to a machine such as iron weights mounted to the wheels or frame. Liquid material such as a water/calcium chloride solution placed in the tires can also serve as ballast. Density: The weight of material in pounds or kilograms per unit of volume (cubic feet or meters). Grader: Any device either self-propelled or mounted on another machine used for final shaping and maintenance of earth or aggregate surfaces. Occasionally, a simple, towed drag-type device is referred to as a grader. Gravel: A mix of stone, sand and fine-sized particles used as sub-base, base or surfacing on a road. In some regions, it may be defined as aggregate. Moisture Content: (in percent) That portion of the total weight of material that exists as water. Moldboard: The part of the grader that is actually used to cut, mix, windrow and spread material. Motor Grader: Any self-propelled machine designed primarily for the final mixing and shaping of dirt or surfacing material. Sometimes referred to as a maintainer, patrol, or simply a "blade." Optimum Moisture: The percentage of water (by weight) in material that allows it to be compacted to achieve greatest density. Paved Road: Any road that has a semi-permanent surface placed on it such as asphalt or concrete. Gravel surfaced roads are virtually always referred to as unpaved roads. Pit: An area where a natural deposit of stone, sand and/or fine material is removed from the earth. Quarry: An area where solid stone is removed from the earth generally by ripping, drilling and/or blasting. The stone is then crushed and processed into useable sizes. Segregation: A problem that arises when the coarse and fine material separates and no longer forms a uniform blend of material. Windrow: A ridge or long, narrow pile of material placed by grader while performing construction or maintenance operations. If you have any questions please contact us by e-mail at admin@EngineerCE.com or by regular mail at: Professional Online Educators, Inc. (dba EngineerCE.com) Abraham Lee, P.E., Business and Content Development Director 125 S. State Road 7 Suite 104-210 Wellington, Florida. 33414 Phone: (888) 3go-4pdh, (888) 346-4734 PDH Online Engineering Continuing Education, PE Renewal, CE engineering license EngineerCE.com http://engineerce.com Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio,Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States government assumes no liability for its contents or use thereof. |
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