Spray Applied Polymer Surface Seals - TSP2

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Lessons Learned Fog Seal Products Sealer emulsions • SS/CSS; CSS-1hP; Ralumac ® • QS/CQS: LD-7 ® • RS/CRS; CRS-2Pd, HFE-100S • Gilsonite-based: GSB ® -Modified Rejuvenator emulsions • Oils: ETR-1; ARA-1; Reclamite ® • AC/Oil: Cyclogen ® ; ERA ® Hybrids • PMAC/Oil: Pass QB ® Fog Seal and Rejuvenator Emulsion Products Used Standard use water-based asphalt emulsions such as diluted SS-1 (Slow Setting emulsified asphalt) or CSS-1 (Cationic Slow Setting emulsified asphalt) are commonly used to “seal” and waterproof the pavement surface or to “bind” or “lock” cover material or fines in place reducing surface raveling. Suppliers have also developed emulsions specifically for fog seals. Rejuvenators are diluted water-based emulsions of oils designed to penetrate into the existing asphalt cement and modify and improve existing chemical and rheological properties. The products used represented a cross-section of commercially available materials. The proprietary product descriptions below are given here to document and describe some of the types of products available as well as the specific materials used in this study. A list of all products on the market was developed at the beginning of the study ([i]), but old products are continually being discontinued and new products introduced. Sealers CSS-1h, CSS-1, CQS-1h and SS-1h The State Departments of Transportation were asked to use their standard fog seal emulsions. These emulsions met state or AASHTO M-140 (anionic) and M-208 (cationic) specifications.([ii]) CRS-2Pd Mn/DOT has actively expanded their fog sealing program since applying CSS-1h on the 2002 project. They believe that a manufacturer-diluted rapid-setting, polymer modified emulsion gives better results on chip seals. Therefore, CRS-2Pd emulsion (d for “diluted”) was used in 2006. Other states also reported that they use polymer emulsions. LD-7 was used on the 2006 Minnesota projects and developed as a fast-curing emulsion trackless tack coat, is also used to lock down aggregates on chip seals. Unique specifications call for a residue softening point greater than 152ºF. GSB Sealer Binders Gilsonite-based emulsion GSB type B was reportedly used in 2002 on MN 251. GSB has been the subject of other research projects, including a Tennessee study. ([iii]) Rejuvenators Pass®-QB quick-break emulsion system is designed specifically for fog seal applications, with an emulsion soap designed to penetrate small pores on the pavement surface. The residue contains asphalt, rejuvenator oil, and polychloroprene latex polymer. Reclamite® Asphalt Preservative Seal is a cationic emulsion designed to penetrate and rejuvenate the top portion of the asphalt mix by fluxing with the binder. The specifications require a low residue asphaltene content (ASTM D-2006-70) of 0.4 to 0.75%. ERA-1 and ERA-25 rejuvenator products represent different blends of asphalt with Reclamite base oil. CRF® Restorative Seal is emulsion spray-applied by a distributor truck and sand spread over the surface. The surface is then drag-broomed to force sand into the voids and cracks. ([i]) Product Listing of Sealers and Rejuvenators. http://www.pavementpreservation.org/fogseals/Project%20Library/Sealer_Rejuvenator_Products.pdf. Accessed July 16, 2007. ([ii]) AASHTO M-140 Emulsified Asphalt, AASHTO M-208 Cationic Emulsified Asphalt. AASHTO, 444 N Capitol St. NW, Washington, DC 20001. ([iii]) AASHTO Product Evaluation List. http://apel.transportation.org/programs/apel/products/evaluation.nsf/57556cf712a8c65b86256aa4002e4391/18130563b8550 a7286256c2f006ace81?OpenDocument&Highlight=2,GSB. Accessed July 13, 2007. 46
Lessons Learned Fog Seal Product Selection Performance varies greatly • Infiltration • Curing time to traffic • Effect on friction • Ability to soften existing binder • Tracking – Need for sanding • Dilution & Application rates Product selection determined by: • <strong>Surface</strong> type (dense, open, chip seal) • Project goal (sealing or rejuvenating) Follow Supplier Recommendations! Curing rejuvenator (top) & fog (bottom) seals 47
Page 1 and 2: Foundation for Pavement Preservatio
Page 3 and 4: Research Participants Acknowledgeme
Page 5 and 6: An Effective Preservation Program
Page 7 and 8: Fog Seal AEMA Definition: a light
Page 9 and 10: CALTRANS MTAG: Rejuvenating Fog Sea
Page 11 and 12: What do we know about Fog Seals? L
Page 13 and 14: Spray Applied Surface Seal : The Pr
Page 15 and 16: DOT Survey Why Fog Seal? Constructi
Page 17 and 18: DOT Survey Pavement Age When Fog Se
Page 19 and 20: Upper Midwest Experiences Nebraska
Page 21 and 22: Unsealed Shoulders 21
Page 23 and 24: MN shoulders: Shedding Light Rain 2
Page 25 and 26: MNDOT - Fog Sealing Chip Seals Ligh
Page 27 and 28: Fog Seals Reduce Snowplow Damage
Page 29 and 30: Fog Seals can reduce: •Moisture I
Page 31 and 32: Lessons Learned Why Fog? Improve Ag
Page 33 and 34: Lessons Learned Why Fog? Prevent Da
Page 35 and 36: Asphalt Oxidation Chemistry The Pro
Page 37 and 38: Asphalt Oxidation Chemistry The Mec
Page 39 and 40: Asphalt Durability Predicting Block
Page 41 and 42: ARIZONA VALIDATION SITE Constructed
Page 43 and 44: EFFECT OF PAVEMENT DEPTH ON AGED AS
Page 45: Increasing m-control with aging for
Page 49 and 50: Test Section Locations AZ - US 87,
Page 51 and 52: Lessons Learned Fog Seal Where to U
Page 53 and 54: Lessons Learned Fog Seal Where NOT
Page 55 and 56: Lessons Learned Fog Seal How to Use
Page 57 and 58: Lessons Learned Fog Seal Emulsion P
Page 59 and 60: Lessons Learned Fog Seal over Chip
Page 61: Lessons Learned How to Apply Seals
Page 64 and 65: Lessons Learned How to Apply Seals
Page 66 and 67: Lessons Learned Controlling Frictio
Page 68 and 69: Lessons Learned IFI (International
Page 70 and 71: Lessons Learned Pavement Permeabili
Page 72 and 73: Lessons Learned Fog Seal Emulsion I
Page 74 and 75: Lessons Learned Fog Seal Pavement F
Page 76 and 77: Lessons Learned Comparison of Frict
Page 78 and 79: Lessons Learned Fog Seal Binder Pro
Page 80 and 81: Rheology Testing of Field Samples G
Page 82 and 83: Permeabilities - MN 251 & OCR 112 1
Page 84 and 85: Permeabilities for AZ & CA 1 All da
Page 86 and 87: G*, Pa, 10 radians/sec, 64C Core Sl
Page 88 and 89: Fog Seal Low Temperature Mix Stiffn
Page 90 and 91: Lessons Learned Static Bending Test
Page 92 and 93: Asphalt Emulsion • Emulsion = A n
Page 94 and 95: Lessons Learned Fog Seal Emulsion P
Page 96 and 97:
Field Observations Notes & photos
Page 98 and 99:
Summary Findings Seals are particu
Page 100 and 101:
Need for Improved Specifications fo
Page 102 and 103:
Recommendations for Future Study N
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Spray Applied Polymer Surface Seals - TSP2

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