Achieving Asphalt Asset Preservation thru State-of-the-Art Material, Machinery, & Methods Specifications & Contractor Accountability

Transcription

1 Achieving Asphalt Asset Preservation thru State-of-the-Art Material, Machinery, & Methods Specifications & Contractor Accountability Timothy R. Murphy, P.E.

2 Answer, Alex: Yes Question: Is this where you belong?

3 Your Vision This convention is an intimate gathering of the top Restaurant Facility Management Professionals (RFMA) for the purpose of learning, sharing ideas, developing partnerships, and problem solving.

4 My Vision Building People Capability

5 Your promise to me for the day MPT recommended Good business practices.

6 The Generation Decoder Card - from MeaganJohnson.com Four Generations I Work With Four Generations. Four Codes. The Traditional Generation (Born pre 1945) Baby Boomers (Born ) Gen-Xer (Born ) The New Millennium (Born post 1980)

7 These 2 ARE NOT who I work for anymore

8 Pavement condition Asset Preservation The Right Time Strategy to Minimize Costs Preventive maintenance treatments Time or traffic Conventional overlay

9 Promised Agenda for RFMA (2011 & 2012) Asphalt pavement design, construction, maintenance practices, and scope of work Case studies will be presented showing how projects can go right or wrong. Review materials, machinery, and methods to specify for asphalt pavements, [Crack sealing, patching, asphalt emulsion seal coating, and asphalt overlays]. Contractor selection criteria, and How to punch-a-job.

10 Promised Agenda for RFMA (2011 & 2012) Asphalt pavement design, construction, maintenance practices, and scope of work Case studies will be presented showing how projects can go right or wrong. Review materials, machinery, and methods to specify for asphalt pavements, [Crack sealing, patching, asphalt emulsion seal coating, and asphalt overlays]. Contractor selection criteria, and How to punch-a-job. Timothy R. Murphy, P.E. President

11 Promised Agenda for RFMA (2011 & 2012) Asphalt pavement design, construction, maintenance, practices, and scope of work Case studies will be presented showing how projects can go right or wrong. Review materials, machinery, and methods to specify for asphalt pavements, [Crack sealing, WORKpatching, asphalt emulsion seal coating, and asphalt overlays]. Contractor selection criteria, and How to punch-a-job. DEVELOPING A COMPETENT AND COMPLETE SCOPE OF Timothy R. Murphy, P.E. President

12 What do your parking lots cost?? Average cost per stall is $1,500 to $2,000 Typical Retail Facility 400 $1,500 = $600, $2,000 = $800,000 (factors for sub-grade preparation, storm sewers, concrete curb & gutter)

13 Causes of Pavement Deterioration Inadequate Pavement Design (RFMA October 2011 Webinar) Improper Construction Techniques Drainage Traffic Pattern Changes Environmental Inadequate Maintenance Poorly Executed Contract (RFMA January 2012 Webinar)

14 Proper Diagnosis = Correct Fix Let s review failure mechanisms that are typical from across the nation and develop techniques to diagnose and properly address (scope a project) the failures.

15 Proper Diagnosis = Correct Fix Let s review failure mechanisms that are typical from across the nation and develop techniques to diagnose and properly address (scope a project) the failures.

16 Correct Fix = Longer Life Asphalt Let s discuss: Crack sealing, Pavement patching, Seal coating, and Asphalt overlays.

17 Correct Fix = Longer Life Asphalt

18 My beginnings.30-years ago 9500 Southwest Hwy. Oak Lawn, IL

19 Various HMA Uses Throughout the Nation Commercial Facilities Intermodal Yards Airfields Bike / Hike Trails Motor Speedways Waste Treatment Fish Hatcheries / Cover Asphalt

20 Great looking new facility

21 Intermodal Yards

22 Intermodal Yards

23 Log Yard

24 Airfields

25 Bike / Hike Trail

26 Motor Speedways

27 Waste Treatment

28 Waste Treatment

29 StreetPrint

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31 Asset Preservation Achieving a proactive approach to maintaining hot mix asphalt (HMA) parking lots

32 Maintain Your Asset A proactive approach to maintaining your pavements will: Provide a safer business environment and reduce claims, Reduce maintenance costs, Assist in long term planning, Improve your return on investment, Ensure appealing front door to customers.

33 Cost ($) --- Economics of Asphalt Total Cost Future Cost Initial Cost Reliability ----> Optimum Construction Cost

34 Initial Costs Thickness Design Soil (Sub-grade) Stabilization Drainage Mitigation Time of Year Asphalt Mix Type Staging Future Costs Crack Sealing Patching Seal Coating Asphalt Overlay Doing what should have been done Initially

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36 Orlando, FL;

37 I work for meals

38 of a great relationship

39 Our beginnings What is needed for evaluation? Site plan, Geotechnical Report, Original thickness design. Products Specifications on: Crack sealing, Patching, Seal coating, Asphalt overlay.

40 Condition Rating Systems

41 Perform a Site Visit

42 Visual Inspection The visual inspection of a pavement structure requires the evaluation of the entire project. Observe any: Structural defects, Surface imperfection, Low areas of ponding water, Areas that indicate seepage of subsurface water and evaluate drainage effects of any future overlays. Poor drainage will weaken the soil sub-grade and / or aggregate base course.

43 Site Visit Notes Project: Somewhere, USA Engineer: MPT Condition Blotchy surface texture. Frequency Patching needed. Water. Segregation. Poor ride.

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45 Raveling & Delamination

46 Wheel Depressions

47 Cracking Transverse, Secondary & Alligator/Fatigue

48 Poor Drainage

49 Poor Drainage

50 Site Visit Rating Summary

51 Site Plan Mark Up from Site Visit

52 Summary of Quantities* Pay Item Unit Quantity Unit Price Concrete curb removal and replacement at various Lin. Ft. 100 $ $ locations Crack sealing, various locations, various lengths Lin. Ft. 4,000 $ $ Hot Mix Asphalt Full-Depth Patches, 6 compacted thickness, various locations as shown on site plan Sealcoat: Asphalt Emulsion (polymerized) with sand load and squeegee applied Sq. Ft. 6,000 $ $ Sq. Ft. 160,000 (Bidders to Validate) $ $ Topsoil (0-6 ), seed, and excelsior blanket Sq. Ft. 2,000 (entrance to catch basins) Striping, ADA included Lump Sum 1 $ $ Total Contract Bid Price $ Total Price

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54 Summary of Quantities Ensures an apples to apples bid between contractors. Captures actual cost per unit for each pay item. Allows for addition and subtraction of quantities to contract in lieu of Lump Sum. Future Opportunity: Add B option to bidding which awards price + time to complete project.

55 RFMA 2012

56 Match the action to the reaction: Heavy Loading Alligator Cracking Cold Weather Oxidizing of Asphalt Hot Weather Thicker Section Moisture Thermal Cracking Thin Pavement Pavement Tragedy

57 All similar type vehicles have loadings that are the same

58 What Have We Observed? Need Picture

59 Bus Circa 1975

60 Bus Circa 2000

61 Variable loads require variable thicknesses for new facilities and repair work (patches)

62 New Facility; Before and After

63 New Facility; Before and After

64 Pavement Thickness Design

65 Heavy (yellow) versus light duty

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67 Life Cycle Cost Analysis

68 Pavement Installation

69 Simple rules of thumb 3 to 1 rule Light duty v. Heavy duty Geotech and Architect Keep sub-grade at uniform elevation

70 3 to 1 rule

71 Commercial Facilities Cars 4 HMA Trucks 6 HMA 10 Construction Platform 8 Construction Platform

72 What are the three primary HMA failure mechanisms? Excessive pavement thickness, light loading, and moisture Light loading, moisture, and thin pavement Moisture, thin pavement, and heavy loading Speed of construction, excessive pavement thickness, and light loading

73 Overlay is last choice, not first Crack seal, Patch, Seal seal.

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75 Objective of Crack Treatment, Definitions Sealing - prevents the intrusion of water or incompressible materials into a working crack Filling - substantially reduces the inflow of water into a non-working crack and reinforces the pavement

76 MPT Standard Specifications Pay Item Definitions Materials Equipment Methods Timeliness Site Specific Items Documentation Reference Doc s. Crack Filling / Sealing / Repairing Walking the pavement, measuring quantities, and defining repair method is required for each site and shall be included in the contract bid documents submitted by each contractor. The contractor shall define which of these processes are recommended per location based on an itemized bid showing all work to be done for each bid. Definitions 1. Crack Filling - Reduces the inflow of water into a non-working crack up to ¼ in width and reinforces the pavement. 2. Crack Sealing - Prevents the intrusion of water or incompressible materials into a working crack from ¼ up to ¾ in width. The use of a backer rod at a depth of approximately 1 is a contractor option to reduce material waste. 3. Crack Repairing Provides for the elimination of random dips and cupping of pavement at various locations up to 3 in width. Materials ASTM D6690, Type I or Type II, shall be used per climate requirements for Crack Sealing everywhere except Southern California, Southern Arizona, New Mexico and Texas where CrafCo or WR Meadows products listed, or equal, shall be used. ASTM D5078 (Crack Filling) ASTM D6690, Type I, II (Crack Sealing) CrafCo Parking Lot Sealant Part No (January 2008) or equal WR Meadows Parking Lot Sealant Part No. 231 (June 2004) or equal Equipment Routers, 1. Vertical-Spindle, (random) 2. Rotary-Impact, (random) 3. Crack Saw (straight) Hot Air Lance capable of obtaining 915 m/s, 1650 o C Wire-brush such as a Billy Goat,

77 What part does crack sealing play in a good pavement management program? $0.80 lin. ft. versus $3.50 / sq. ft.

78 Evolution of a Crack

79 Incorrect Timing?

80 Water Wins!

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82 Proactive crack sealing

83 Location Directs Material Choice!

84 What equipment needs exist for crack sealing?

85 Fill or Seal? Placement Configurations Flush Fill Reservoir & Flush ½ x ½

86 With Proper Application In A Timely Manner, You Can Expect: 5+ Years of Service Life Low Maintenance No Pot Holes Improved Pavement Conditions A Smoother Pavement

87 Birth of a Pothole

88 Commercial Parking Lots - Traffic

89 Fatigue = Alligator Cracking a series of interconnected cracks caused by the fatigue failure of asphalt surface or stabilized base under repeated traffic loading.

90 Sub-Grade & Thickness Design Problems

91 Locate Failure

92 Layout Removal

93 Saw cut perimeters

94 Remove Failure

95 Replace with 3 Top-Size Stone

96 HMA Patch Base Preparation

97 Compact

98 HMA Patch Examples

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100 Where is the patch and why?

101 Crack sealing and pavement patching are your two best friends

102 Asphalt Emulsion (Polymerized w/heavy sand load)

103 Raveling and Hairline cracks

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105 If you build it they will come. - Teddy Roosevelt (Panama Canal), not Kevin Costner (Field of Dreams)

106 But what if they don t?

107 But what if they don t?

108 Surface Treatments Treatments: Have specific uses Should be timely Are not considered to add strength Must have surface properly prepared

109 Surface Treatments Treatments: Have specific uses Should be timely Are not considered to add strength Must have surface properly prepared

110 Considerations for surface treatments Determine typical life cycle for the product that you are considering based on your location. Is the type of treatment masking the problems that your pavement has?

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113 Surface Treatments Purpose is to provide: Waterproof cover Increase skid resistance Improved aesthetics of old surfaces Slows oxidation of pavement Seals surface voids Seals hairline cracks Increase life

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115 Types of Surface Treatments Coal Tar Emulsion - Coating Asphalt Emulsion Penetrate & Coat Rejuvenators - Penetrating Slurry Seals Wearing Surface Chip Seals Wearing Surface Micro-Surfacing Wearing Surface

116 Types of Surface Treatments Coal Tar Emulsion - NO Asphalt Emulsion - YES Rejuvenators NO Slurry Seals YES Chip Seals NO Micro-Surfacing NO

117 Coal Tar Surface Cracking

118 Resources

119 Surface Treatments Asphalt Emulsion (Polymer Modified) with sand Single treatments Multiple treatments Sand seals (slang) Nighttime & full mobilization

120 Surface Treatments Asphalt Emulsion (Polymer Modified) Specification needed Consider if your pavement is < five years old and has been not been previously sealed Use if your pavement has been sealed before with an asphalt emulsion sealer

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124 Understand Application Rate and Check Yield

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127 Sealant Penetrating Crack

128 What equipment needs exist for seal coating?

129 Squeegee; Yes or No

130 Using Equipment Improperly

131 Using equipment properly

132 Maintain Costs Work at night, Program multiple sites each year, Treat one-half the entire site per mobilization, Close early & open late; once.

133 Hot Mix Asphalt Farm to Market Commercial Local Agency Interstates Tollways Intersections US and SR

134 All Hot Mix Asphalt (HMA) is the same

135 Successful Hot Mix Asphalt

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137 Surface Course vs. Lower Lifts Size of aggregate Type of materials Lift thicknesses placed

138 according to Murphy

139 Aesthetics is important

140 Asphalt Paving Awards, MPT Appearance Approaches Degree of Difficulty Edges Longitudinal and Transverse Joints

141 Asphalt Paving Awards, MPT Quality Control Ride Texture Uniformity Timeliness Utility Covers

142 Murphy Nationwide Specification Surface course top size aggregate = ½ 3.5%, Jts. with traffic, 45% passing #8, FAA = 40+, Density > 92%, Vibratory roller.

143 Murphy Nationwide Specification

144 Vibratory Rollers & Thin Lifts

145 Hot Mix Asphalt Paver

146 Assuring Quality in HMA Construction Blending the art of construction with the science of engineering. Paul H. Schmidt ( )

147 Key Elements for Successful Construction of Commercial Parking Lots Material Specifications Detailed Construction Methods Detailed Proposal Form Materials Submittals and Approval Qualified Construction Oversight Material Testing Material Yield Verification*** Compaction Testing

148 Project Size Small projects are typically turn key and warranty. Large projects have detailed plans and specifications plus construction over-site. The size and complexity of the project along with the perceived reputation of the contractor may determine the extent of the QA program.

149 Autopsy Site Heavy Duty pavement areas inside red boundary.

150 Pavement Construction Construction variability influences performance

151 How many odd-ball situations need to be anticipated with commercial asphalt? Cut-through traffic, Region of nation, Caliber of contracting industry, Time of year construction, HMA mix type availability

152 Mitigate cut through traffic

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154 demands a detailed Materials, Machinery, and Methods.

155 demands a detailed Vehicle Use / Staging Drainage and Soil Condition Sub-grade Preparation Grade (Slopes) Pavement Thickness (Compacted) Compaction and Smoothness Requirements Accurate Quantities

156 demands a detailed Total Price and Payment Schedule Guarantees and Warranties Proposed Job Changes in Writing References Liability Insurance

157 What is going on with material costs? Refiners found a more profitable use for asphalt War in Iraq Asia is consuming everything that isn t nailed down All of the Above

158 Construction Observation Provide on-site Quality Assurance. Verify yield and quality of the asphalt. Size and complexity of the project typically drives decision for oversite.

159 Construction Observation Darden - HMA(Hot-Mix Asphalt) Tonnage Calculations Patching Provide on-site Quality Assurance. 1. For multiple patching locations entire length & width of each patch, enter compacted thickness Verify yield and quality of the asphalt. of asphalt and it will calculate required tonnage. The total tonnage for the number of patches entered will also be calculated. Size and complexity of the project Compacted HMA Length Width Area Area Thickness Required typically drives decision for oversite. (Feet) (Feet) (Sq. Ft.) (Sq. Yd.) (inches) (Tons) Total Tons Required: 85.1

160 Asphalt Pavement Rehabilitation Options and Costs

161 Structural Overlay When to use: Resurface structurally sound pavement that has isolated areas of failure Method: Patch where required, Install under-drain if required, Mill perimeter of area to be paved, Place tack coat, Install variable thickness leveling course, Place 1.5 (compacted thickness) hot mix asphalt.

162 Milling Wedge Grind or Perimeter Milling Wedge grinding for smooth transitions ext Ten Photo Slides

163 Milling Milling for base patching

164 Leveling Entire Lot

165 Asphalt Surface Course

166 Structural Overlay Pay Item: Square Foot or Square Yard Cost: $2.00 / SF or $18.00 / SY

167 Reconstruction When to use: Entire pavement structure is failed Method: Excavate variable depth based on conditions, Grade and compact subgrade, Place separation geotextile if required, Install drainage layer of stone, Install aggregate base, Install a minimum of 4 compacted hot mix asphalt.

168 Heavy (yellow) versus light duty

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170 Asphalt Pavement Reconstruction

171 Asphalt Pavement Reconstruction

172 Asphalt Pavement Reconstruction

173 Asphalt Pavement Reconstruction

174 Asphalt Pavement Reconstruction

175 Asphalt Pavement Reconstruction

176 Reconstruction Pay Item: Square Foot or Square Yard Cost: $ $5.75 / SF or $ $52.00 / SY Approximately 3 x s the cost of a Structural Overlay

177 Key Elements for Successful Construction of Commercial Parking Lots Material Specifications Detailed Construction Methods Detailed Proposal Form Materials Submittals and Approval Qualified Construction Oversight Material Testing Material Yield Verification*** Compaction Testing

178 Experiment With Materials

179 Questions & maybe some answers

180 for restaurant facilities

181 Thank You Very Much!