Correlation of Coal Floras in Henry County, Missouri, and the Narragansett Basin

Microsurface mix, or microsurfacing, can be used for sealing and providing a friction surface for cracked and deteriorated surface mixes. This mix, essentially consisting of 9.5-mm (0.37-in.) screenings bonded by a polymer-modified asphalt emulsion, is economical and can be placed very swiftly. Microsurfacing is also aesthetically pleasing because of its resemblance to hot-mix asphalt. In 1990–1991, the Georgia Department of Transportation (GDOT) successfully used microsurfacing in a test section on I-75 in Henry County, which had high traffic volumes and a heavy truck concentration. Two varieties of the mix were used, and both showed little deterioration after 2 years. In 1996, GDOT opted to use microsurfacing for a 9.2-km (5.7-mi) section of I-285 in Atlanta between Conley Road and Old National Highway. This 92 lane-km (57-lane-mi) project was initiated to address the raveling and cracking in the section and improve its appearance before the 1996 summer Olympics. The I-285 project began in late May 1996 and was completed in 1 month. The microsurfacing used on I-285 has performed quite well since the project was completed. No additional problems with raveling or load cracking have been encountered. The mix has provided excellent smoothness and good friction, with a minimal increase in pavement noise levels. Microsurfacing may be suitable for use on cracked pavements in lieu of more conventional rehabilitation methods such as crack sealing, leveling, and double surface treatments.

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Evaluation of Runner-Type Peanut Cultivar Tolerance to Paraquat Tank Mixes

Peanut Science ◽

10.3146/ps20-7.1 ◽

2020 ◽

Vol 47 (2) ◽

pp. 103-110

Author(s):

Katilyn Price ◽

Xiao Li ◽

Andrew Price ◽

Charles Chen ◽

Timothy Grey

Keyword(s):

Weed Control ◽

Yield Loss ◽

Growth Parameters ◽

Field Trials ◽

Growth And Yield ◽

Henry County ◽

Peanut Cultivars ◽

Herbicide Programs ◽

Control Spectrum

ABSTRACT Herbicide tank mixes are often used to reduce peanut injury caused by paraquat and broaden the weed control spectrum. New peanut cultivars are continuously being introduced therefore determining tolerance to paraquat based herbicide programs is essential to provide growers with appropriate recommendations. The objective of this trial was to evaluate effect of paraquat based herbicide programs on newer peanut cultivars growth and yield. Field trials were conducted in Macon, Henry and Baldwin counties in Alabama in 2016 and 2017 and the peanut cultivars ‘Georgia 06G', ‘Georgia 12Y', ‘Georgia 14N', and ‘TufRunner 511’ were evaluated. Paraquat was applied alone (210, 280, 420 g ai/ha), in tank mixes with either bentazon plus acifluorfen or 2,4-DB and one of the following, S-metolachlor, pyroxasulfone, acetochlor, or pyroxasulfone plus carfentrazone at the highest labeled rates 3 to 4 wk after peanut planting. No cultivar by treatment interactions were observed for any growth parameters evaluated for any location. In 2017, paraquat either applied at 280 g ai/ha alone, tank mixed with S-metolachlor plus 2,4-DB, or with S-metolachlor plus bentazon plus acifluorfen significantly reduced canopy widths of 22 to 30%, 12 to 22%, and 20 to 37% respectively at 45 to 48 DAP when compared to the non-treated check (NTC). Yield reductions compared to the NTC were rare, paraquat plus bentazon plus acifluorfen plus pyroxasulfone plus carfentrazone had a 13% yield loss in Henry County and a 7% yield loss with paraquat 280 g ai/ha at Baldwin County in 2016 only. Data indicates peanut stunting may be observed following applications of paraquat tank mixes evaluated in this study, but it is unlikely these effects result in yield loss.

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Geologic map of the Franklinton quadrangle, Henry County, Kentucky

10.3133/gq1330 ◽

1976 ◽

Keyword(s):

Henry County ◽

Geologic Map

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The One-Armed Hero of Henry County

Gettysburg Requiem ◽

10.1093/acprof:oso/9780195331318.003.0010 ◽

2007 ◽

pp. 193-222

Author(s):

Glenn W. LaFantasie

Keyword(s):

Henry County ◽

The One

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Georgia’s Experience With Crumb Rubber in Hot-Mix Asphalt

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1583-06 ◽

1997 ◽

Vol 1583 (1) ◽

pp. 45-51 ◽

Cited By ~ 5

Author(s):

Dan R. Brown ◽

David Jared ◽

Chris Jones ◽

Don Watson

Keyword(s):

Test Section ◽

Hot Mix Asphalt ◽

Crumb Rubber ◽

Vacuum Extraction ◽

Department Of Transportation ◽

Reflective Cracking ◽

Ground Tire Rubber ◽

Asphalt Cement ◽

Wet Process ◽

Henry County

In 1991, the Georgia Department of Transportation (GDOT) began to evaluate the production and placement of crumb rubber hot-mix asphalt. The crumb rubber mix (CRM) used by GDOT was produced by adding ground tire rubber to hot-mix asphalt using the wet process. A test section of CRM was placed on I-75 in Henry County, just south of Atlanta, consisting of a surface mix containing 6 percent crumb rubber by weight of asphalt cement (AC). The test section was evaluated from 1991 to 1995. The test section indicated that the CRM became very brittle over time, as indicated by a large increase in viscosity and decrease in penetration, and by a large amount of transverse reflective cracking. Compared with the control mix, the CRM did not reduce rutting and was more than twice as expensive to place. In addition to the test section, two contract projects were initiated using CRM. These two projects indicated that CRM could be produced and placed using conventional equipment requiring only a few modifications. On-site blending units were used to combine the crumb rubber at a dosage rate of 16 percent by weight of AC. Pump and metering equipment was modified to accurately meter the stiff asphalt material, and correction factors were established for determining the AC content by vacuum extraction, since some of the rubber particles were retained in the aggregate portion of the sample.

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