Influence of Handling on the Effectiveness of Antistripping Additives PDF Download
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Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 14
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Book Description
The purpose of this investigation was to determine the influence of the procedures used in handling asphalt-additive blends on the effectiveness of antistripping additives in asphaltic concrete. The additives were blended with the asphalt cements before shipment by tank truck to the hot mix plants. Laboratory tests were performed on samples of the asphalt cement obtained prior to the blending process at the terminal and after blending and shipment by tank truck to the hot mix plant. Quick bottle tests and infrared spectrophometer tests were used to determine the presence and approximate amount of additive, respectively. A stripping test was performed to determine the effectiveness of the additive. The results of this limited investigation indicate that the present procedure of blending asphalt and antistripping additive before shipment to the hot mix plant is satisfactory; however, long periods of storage at high temperatures might cause the additive to lose part of its effectiveness.
Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 14
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Book Description
The purpose of this investigation was to determine the influence of the procedures used in handling asphalt-additive blends on the effectiveness of antistripping additives in asphaltic concrete. The additives were blended with the asphalt cements before shipment by tank truck to the hot mix plants. Laboratory tests were performed on samples of the asphalt cement obtained prior to the blending process at the terminal and after blending and shipment by tank truck to the hot mix plant. Quick bottle tests and infrared spectrophometer tests were used to determine the presence and approximate amount of additive, respectively. A stripping test was performed to determine the effectiveness of the additive. The results of this limited investigation indicate that the present procedure of blending asphalt and antistripping additive before shipment to the hot mix plant is satisfactory; however, long periods of storage at high temperatures might cause the additive to lose part of its effectiveness.
Author: Kathryn Page Copeland
Publisher:
ISBN:
Category :
Languages : en
Pages : 172
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Book Description
Author: Selvaratnam Selvamohan
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 342
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Book Description
Author: David G. Tunnicliff
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 60
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Book Description
Author: G. W. Maupin
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 13
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Book Description
A previous field study of 12 pavements revealed considerable stripping in the surface layers of mixtures placed in 1991-92. Most of the mixes containing chemical additives showed visual stripping, but the ones containing hydrated lime did not show significant stripping. This study was a broad field survey with cores taken from each of the nine VDOT districts. The purpose was to get a better estimate of stripping in Virginia than that of the earlier study. Significant visual stripping was detected in many sites, which verified the fmdings of the earlier study. However, in this study, hydrated lime performed no better than chemical additives. The SM-2A 50-blow mixes with slightly more asphalt performed no better than the SM-2B or SM-2C 75-blow mixes. Pavement voids at many sites were too high for good durability, and the compaction and mix design specifications should be examined. The degree of stripping damage in underlying layers could influence performance at many sites.
Author:
Publisher:
ISBN:
Category : Asphalt concrete
Languages : en
Pages : 60
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Book Description
Author: Jagannatha Reddy Katkuri
Publisher:
ISBN:
Category :
Languages : en
Pages : 338
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Book Description
Author: G. W. Maupin
Publisher:
ISBN:
Category : Asphalt cement
Languages : en
Pages : 13
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Book Description
The objective of this investigation was to determine the effect of antistripping additives on the compaction of bituminous concrete. To do this, the densities obtained on test sections with and without additive were compared. Comparisons of nuclear densities and the void contents of cores from the pavement revealed no significant differences. Also, there were no significant differences in the optimum numbers of roller passes required to attain maximum density on the sections with and without additive. The properties of the asphalt cement were probably not influenced enough by the additives to affect compaction. Based on the results of this investigation, the inability to achieve the desired density should not be attributed to the use of antistripping additives.
Author: Juan Godofredo Wiegering
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 272
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Book Description
