Membrane Encapsulated Soil Layer (MESL) for Contingency Airfields PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Membrane Encapsulated Soil Layer (MESL) for Contingency Airfields PDF full book. Access full book title Membrane Encapsulated Soil Layer (MESL) for Contingency Airfields by C. L. Rone. Download full books in PDF and EPUB format.
Author: C. L. Rone
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
This study was conducted to evaluate thickness requirements for membrane encapsulated soil layers (MESL) having various surfacing materials when subjected to 100 passes of F-4C aircraft loading and to determine the feasibility of constructing thin layers (5 to 9 inches) of MESL on low strength subgrade. A test section consisting of five items was constructed and trafficked. All five items were constructed on a prepared subgrade having a rated California Bearing Ratio (CBR) of 7. Thicknesses of MESL base courses were 9, 5, 7, 9, and 9 inches for items 1 through 5, respectively. Surfacing material consisted of 4 inches of asphaltic concrete on items 1 and 2, 2 inches of asphaltic concrete on item 3, only the waterproof surfacing of the MESL on item 4, a synthetic turf on item 4A, and a 1-1/2-inch-thick sod on item 5. The significant findings of this study are that (1) thin MESL base courses can be constructed over a 7 CBR subgrade; (2) a MESL with only the waterproof surface will structurally withstand 10 coverages of F-4C traffic but may be rendered susceptible to water due to wrinkling of the waterproof surfacing under traffic; (3) a MESL is susceptible to infiltration of water when overlaid with a layer of wet material such as sod; and (4) a MESL base course 7 inches thick with a 2-inch surfacing of asphalt concrete constructed on a 7 CBR subgrade will withstand 14 coverages (approximately 140 passes) of F-4C traffic. (Author).
Author: C. L. Rone
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
Get Book Here
Book Description
This study was conducted to evaluate thickness requirements for membrane encapsulated soil layers (MESL) having various surfacing materials when subjected to 100 passes of F-4C aircraft loading and to determine the feasibility of constructing thin layers (5 to 9 inches) of MESL on low strength subgrade. A test section consisting of five items was constructed and trafficked. All five items were constructed on a prepared subgrade having a rated California Bearing Ratio (CBR) of 7. Thicknesses of MESL base courses were 9, 5, 7, 9, and 9 inches for items 1 through 5, respectively. Surfacing material consisted of 4 inches of asphaltic concrete on items 1 and 2, 2 inches of asphaltic concrete on item 3, only the waterproof surfacing of the MESL on item 4, a synthetic turf on item 4A, and a 1-1/2-inch-thick sod on item 5. The significant findings of this study are that (1) thin MESL base courses can be constructed over a 7 CBR subgrade; (2) a MESL with only the waterproof surface will structurally withstand 10 coverages of F-4C traffic but may be rendered susceptible to water due to wrinkling of the waterproof surfacing under traffic; (3) a MESL is susceptible to infiltration of water when overlaid with a layer of wet material such as sod; and (4) a MESL base course 7 inches thick with a 2-inch surfacing of asphalt concrete constructed on a 7 CBR subgrade will withstand 14 coverages (approximately 140 passes) of F-4C traffic. (Author).
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1204
Get Book Here
Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author: J.P. Giroud
Publisher:
ISBN: 9780935803020
Category :
Languages : en
Pages : 948
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1066
Get Book Here
Book Description
Author: U.S. Army Engineer Waterways Experiment Station
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 628
Get Book Here
Book Description
Author: Albert Jasper Bush
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 138
Get Book Here
Book Description
The objective of this investigation was to design, construct, and evaluate two promising ALRS concepts for full-scale operations of the F-4 aircraft. After aircraft traffic was completed, test sections were trafficked to failure with loadcarts simulating maximum loaded F-4 and F-15 aircraft. Aircraft and pavement surface interaction were evaluated for a thin asphalt surfaced pavement and for unsurfaced stabilization soil pavement. Significant findings included: (1) an asphalt surface course thickness of 2 inches over a conventionally designed pavement will support 150 passes of the F-4 aircraft, (2) a surface course is required for stabilized soil structures, particularly in areas subjected to jet blast for the prevention of foreign object damage to engines, (3) deflection from the falling weight deflectometer can be used with a layered elastic model to predict performance of the pavement structures, and (4) the CBR design procedure should not be modified for the design of ALRS pavements.
Author: United States. Federal Highway Administration
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 726
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Hazardous wastes
Languages : en
Pages : 156
Get Book Here
Book Description
Author: Jeffrey Evans
Publisher: CRC Press
ISBN: 1000411435
Category : Technology & Engineering
Languages : en
Pages : 418
Get Book Here
Book Description
Ground improvement has been one of the most dynamic and rapidly evolving areas of geotechnical engineering and construction over the past 40 years. The need to develop sites with marginal soils has made ground improvement an increasingly important core component of geotechnical engineering curricula. Fundamentals of Ground Improvement Engineering addresses the most effective and latest cutting-edge techniques for ground improvement. Key ground improvement methods are introduced that provide readers with a thorough understanding of the theory, design principles, and construction approaches that underpin each method. Major topics are compaction, permeation grouting, vibratory methods, soil mixing, stabilization and solidification, cutoff walls, dewatering, consolidation, geosynthetics, jet grouting, ground freezing, compaction grouting, and earth retention. The book is ideal for undergraduate and graduate-level university students, as well as practitioners seeking fundamental background in these techniques. The numerous problems, with worked examples, photographs, schematics, charts and graphs make it an excellent reference and teaching tool.
Author: Xavier Bonnefoy
Publisher: World Health Organization
ISBN: 9289071885
Category : Medical
Languages : en
Pages : 293
Get Book Here
Book Description
The second half of the 20th century and the beginning of the 21st century witnessed important changes in ecology, climate and human behaviour that favoured the development of urban pests. Most alarmingly, urban planners now face the dramatic expansion of urban sprawl, in which city suburbs are growing into the natural habitats of ticks, rodents and other pests. Also, many city managers now erroneously assume that pest-borne diseases are relics of the past. All these changes make timely a new analysis of the direct and indirect effects of present-day urban pests on health. Such an analysis should lead to the development of strategies to manage them and reduce the risk of exposure. To this end, WHO invited international experts in various fields - pests, pest-related diseases and pest management - to provide evidence on which to base policies. These experts identified the public health risk posed by various pests and appropriate measures to prevent and control them. This book presents their conclusions and formulates policy options for all levels of decision-making to manage pests and pest-related diseases in the future. [Ed.]
