Criteria for Opening Expedited Bonded Concrete Overlays to Traffic

1997 ◽  
Vol 1574 (1) ◽  
pp. 103-108 ◽  
Author(s):  
N. J. Delatte ◽  
D. W. Fowler ◽  
B. F. McCullough

For rehabilitation of concrete pavements, resurfacing with a bonded concrete overlay (BCO) may provide significantly longer life and reduced maintenance costs. Two important issues to consider in rehabilitation are bonding and rapid reopening of resurfaced sections. The purpose of accelerated or expedited concrete paving is to limit the duration of lane closure and inconvenience to the public. Expedited BCOs offer an economical method for substantially extending rigid pavement life. Research for expedited BCOs in El Paso and Fort Worth, Texas, has been carried out for the Texas Department of Transportation by the Center for Transportation Research at the University of Texas. Results of previous expedited BCO construction are reviewed. Laboratory testing for this project included a high-early-strength mix design, bond development of that mix design, and early-age fatigue strength of half-scale BCO models. A 122-m-long test strip was cast with eight different expedited BCO designs, and accelerated traffic loading was imposed at 12 hr. Recommendations are made for construction and quality control of BCOs for early opening to traffic.

2013 ◽  
Vol 55 (Supl.4) ◽  
pp. 447
Author(s):  
Xóchitl Castañeda

On behalf of the editorial committee of this special edition of the Migration and Health Research Program (Programa de Investigación en Migración y Salud or PIMSA, for its Spanish acronym), the Mexico´s Ministry of Health (SSa), the National Council of Science and Technology of Mexico (Conacyt), the Health Initiative of the Americas (HIA) at the School of Public Health of the University of California at Berkeley, and The University of Texas at El Paso, we are pleased to introduce this special publication on migration and health between Mexico and the United States...


Author(s):  
Jolanda Prozzi ◽  
Kellie Spurgeon ◽  
Robert Harrison

In 2000, the Texas Department of Transportation contracted with the Center for Transportation Research (CTR) at the University of Texas, Austin, to analyze containerized freight movements in Texas. Although aggregate data are available on the container sector and global movements, including data on container manufacturing, steamship companies, container routes, vessel capacities, and costs and supply chains, little information is available on container movements in the United States. To shippers and those directly involved in the container sector, some data on container movements in the United States—including route choice—are available. However, for those involved in freight planning at the state level, such information remains somewhat of a mystery. To fill this void, the CTR research team sought the assistance of various transportation stakeholders involved in containerized freight movements in an effort to characterize and gain a better understanding of this important and growing component of the freight sector. A total of 31 telephone interviews were conducted, involving 3 major ocean carriers, 12 trucking companies, 8 freight forwarders, 7 container leasing companies, and 1 railroad representative. Questions addressed container ownership, liability at different stages of a movement, benefits of different types of leases, container tracking (state of practice), transfer costs, security risks, and the outcome of a container at the end of its useful life. This study provides planners and those outside the industry with information on this dynamic sector and likely future changes.


2021 ◽  
Vol 1 (1) ◽  
pp. 68-91
Author(s):  

At semester’s end at the University of Texas at El Paso and at the University of Texas of the Permian Basin, faculty members directing the PLTL Programs invite Peer Leaders to reflect on their experience, to describe their challenges, and to offer their personal advice. For the benefit of future Peer Leaders, here are their stories, reflections, observations, and advice about leadership and the practice of leading.


Author(s):  
Timothy K. Perttula

In 1990, Amick investigated a well-preserved Late Caddo Frankston phase midden deposit at the ALCOA #1 (41AN87) site on Mound Prairie Creek, about 7 km northeast of Palestine, Texas. During the course of that work, more than 900 Caddo ceramic vessel sherds and a few pipe sherds were recovered, but they were only cursorily described by Amick. That was unfortunate at the time because it appeared then, and is still evident now, that the ALCOA #I site was a single component 15th century A.D. Frankston phase settlement, and detailed study of the recovered ceramic assemblage would have provided unique insights into the stylistic and technological character of the ceramic vessels being made and used for culinary purposes by the prehistoric Caddo in this part of the Neches River basin. With the renewed study of the archaeology of the Frankston phase occasioned by the Texas Department of Transportation-sponsored excavations at the Lang Pasture site (41AN38) and the recovery there of a substantial ceramic sherd assemblage-and the reexamination of sherd and vessel collections from Frankston phase collections at the Texas Archeological Research Laboratory, The University of Texas at Austin, I returned to the detailed study of the ALCOA # 1 ceramic assemblage. The assemblage of ceramic vessel sherds from the Amick work is sufficiently robust that it is possible to characterize with some precision the use of fine wares, utility wares, and plain wares by the 15th century A.D. Caddo that lived at the site.


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