Chip Seal Best Practices (2005) / Chapter Skim
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Appendix A - Chip Seal Synthesis Questionnaire
Appendix A - Chip Seal Synthesis Questionnaire
Pages 73-83
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From page 73... ...
Virginia Washington Wyoming NP = No chip seal program. TABLE A1 SUMMARY OF CHIP SEAL SYNTHESIS SURVEY RESPONSES as a number of chip seal contractors that expressed an interest in the project.
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From page 74... ...
Much of the practice is based on local anecdotal experience rather than sound engineering principles, and while the design and installation of chip seals involve a significant degree of "art," a strong body of knowledge on the subject has been developed and is scattered throughout the literature of transportation organizations, government agencies, and academia. Technical information is available on good practice for materials, design, construction techniques, and effectiveness of chip seals, and will be summarized in a synthesis.
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At this time, what proportion of your highway lane miles have chip seals or surface treatments as the wearing course? Total centerline □ miles/□ km □ miles/□ km with chip seal Rural -- local Rural -- collector Rural -- arterial Rural -- interstate Urban -- local Urban -- collector Urban -- arterial Urban -- interstate
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□ Poor; we have serious difficulties with contract chip seal performance. □ Unacceptable; we use contract chip seals when it is the only alternative.
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Road Note 39 □ Asphalt Institute Method (MS-19) □ Modified Marshall Hammer per New Zealand TNZ P17 Method □ Sand patch testing □ Empirical method based on past experience □ No formal design method □ Individual organizational method Please briefly describe your process or attach a copy of your design method to this questionnaire when you submit it.
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What is the maximum traffic volume on roads on which your agency constructs chip seals?
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Natural stone or gravel chip seal aggregate: $/ton or currency/ton Lightweight chip seal aggregate: $/ton or currency/ton Crushed slag chip seal aggregate: $/ton or currency/ton Other, please specify: $/ton or currency/ton 41. What types of natural aggregate are typically used on your chip seal projects?
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□ Static steel □ Vibratory steel □ Pneumatic-tired □ Combination pneumatic/steel □ Combination vibratory/pneumatic □ Other, please specify: 49. What roller types are considered appropriate for use on chip seals using asphalt binders?
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From page 81... ...
Prior to chip sealing, what road preparation methods are typically performed for the existing surface? □ Chip seal placed on freshly paved asphalt surface □ Crack sealing □ Fog coat □ Cold mix patch and level □ Geotextile to retard reflective cracking □ Other, please specify: 52.
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What common distresses are observed in your chip seals? To the right, please indicate the top three distresses in order of occurrence.
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__________ □ Aggregate spread late □ Dirty or dusty aggregate □ Aggregate gradation □ Improper binder viscosity □ Improper binder temperature □ Other, please specify: 80. Which factors are most critical in determining the life of your chip seals?
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