Caltrans Contract No. 65A0151 Caltrans Caltrans Contract No. 65A0151 MACTEC Slurry/Micro-Surface Mix Design Procedure Slurry/Micro-Surface Mix Design Procedure Prepared By Fugro Consultants Inc. APTech Consolidated Engineering Laboratories MACTEC Prepared By Prepared By Fugro Consultants Inc. Fugro Consultants Inc. APTech APTech Consolidated Engineering Laboratories Consolidated Engineering Laboratories MACTEC MACTEC Northeast Pavement Preservation Partnership Warwick, Rhode Island December 11, 2007 Northeast Pavement Preservation Partnership Northeast Pavement Preservation Partnership Warwick, Rhode Island Warwick, Rhode Island December 11, 2007 December 11, 2007
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DOTDOT’’ssCaltransCaltrans, Delaware, Georgia, Illinois, , Delaware, Georgia, Illinois, Kansas, Maine, Michigan, Minnesota, Kansas, Maine, Michigan, Minnesota, Missouri, New Hampshire, New York, Missouri, New Hampshire, New York, North Dakota, Texas, VermontNorth Dakota, Texas, Vermont
FHWAFHWAISSAISSAContractorsContractors
Fugro ConsultantsFugro ConsultantsMACTEC Engineering and ConsultingMACTEC Engineering and ConsultingConsolidated Engineering LaboratoriesConsolidated Engineering LaboratoriesApplied Pavement TechnologyApplied Pavement Technology
Rational mix design proceduresRational mix design proceduresGuidelines for proper use and Guidelines for proper use and application of these systemsapplication of these systemsImproved specificationsImproved specifications
Improve the performance of slurry surfacing systems through the development of:
Work Plan and Study ApproachWork Plan and Study Approach
Phase IPhase IReview literatureReview literatureSurvey industry and agenciesSurvey industry and agenciesDevelop detailed plans for Phases II Develop detailed plans for Phases II and IIIand III
Phase II Phase II Develop and evaluate mix design Develop and evaluate mix design proceduresprocedures
Phase III Phase III Conduct field validationConduct field validationDevelop guidelines & specsDevelop guidelines & specsDevelop training materialsDevelop training materials
Mix design methodMix design methodExtent of useExtent of useBenefitsBenefitsProblemsProblemsLife expectancyLife expectancyTests that relate to performanceTests that relate to performanceQuality assurance testingQuality assurance testing
All methods derived from ISSA All methods derived from ISSA Guidelines A105 and A143Guidelines A105 and A143Extensive experience with product Extensive experience with product needed to ensure success of a projectneeded to ensure success of a projectConcerns with the repeatability of the Concerns with the repeatability of the laboratory tests used in designlaboratory tests used in design
Documented slurry seal and Documented slurry seal and microsurfacing performance data microsurfacing performance data limited limited Failures generally a result of:Failures generally a result of:
Poor project selection (need to Poor project selection (need to educate agencies on the proper use educate agencies on the proper use of slurry and microsurfacing)of slurry and microsurfacing)Contractor capabilities and Contractor capabilities and experienceexperience
Phase I ReportPhase I ReportDetailed Work Plan for Phase IIDetailed Work Plan for Phase IIDetailed Work Plan for Phase IIIDetailed Work Plan for Phase III
Phase I Phase I –– CompletedCompletedPanel Meeting Panel Meeting –– Due February 2004Due February 2004
Develop framework for rational mix Develop framework for rational mix design proceduredesign procedureEvaluate existing and proposed test Evaluate existing and proposed test methodsmethodsPerform ruggedness testing of Perform ruggedness testing of proposed test methodsproposed test methodsFinalize mix design and develop Finalize mix design and develop AASHTO style test protocolsAASHTO style test protocolsMake recommendations for Make recommendations for ““field testfield test””for slurry and microsurfacingfor slurry and microsurfacing
Mixable Mixable –– Components can be Components can be mixed, coated and applied mixed, coated and applied through the machinethrough the machine
Workable Workable –– Applied mixture sets Applied mixture sets and cures within a reasonable and cures within a reasonable time to allow return of traffic time to allow return of traffic without causing damagewithout causing damage
Mixture performance Mixture performance Maintains acceptable friction Maintains acceptable friction resistanceresistanceDoes not ravel, deDoes not ravel, de--bond, bond, bleed, exhibit moisture bleed, exhibit moisture damage, or lose damage, or lose cohesiveness over the life of cohesiveness over the life of the treatmentthe treatment
RepeatableRepeatableRelate to field performanceRelate to field performanceCovers the range of temperature Covers the range of temperature and humidity conditions that may and humidity conditions that may occur in the fieldoccur in the fieldEasy to implementEasy to implementReasonable costReasonable cost
Should there be a distinction?Should there be a distinction?PerformancePerformance –– Mix design method should Mix design method should simply show the benefit of one system over simply show the benefit of one system over the other (e.g., rut filling capabilities, rapid the other (e.g., rut filling capabilities, rapid vs. slow set)vs. slow set)ConstructabilityConstructability –– Issues are the sameIssues are the same
TeamTeam’’s recommendation:s recommendation:Slurry = Micro = Slurry Surfacing Systems (S3)Slurry = Micro = Slurry Surfacing Systems (S3)
300 tests on 5 slurry surfacing systems at 3 300 tests on 5 slurry surfacing systems at 3 temperatures and 2 humidity levelstemperatures and 2 humidity levels
With and without compactionWith and without compactionWith and without conditioning (soaking With and without conditioning (soaking + oven cure)+ oven cure)
Major findingsMajor findingsCompaction does not influence the Compaction does not influence the resultsresultsTemperature, humidity and curing time Temperature, humidity and curing time affect abrasion resistance of nonaffect abrasion resistance of non--soaked soaked specimens and predictive models can be specimens and predictive models can be developed to estimate these effectsdeveloped to estimate these effects
Field Test for Micro/SlurryField Test for Micro/Slurry
PurposePurposeCorrelate with long term Correlate with long term performanceperformanceEvaluate uniformity and Evaluate uniformity and conformance with mix designconformance with mix designEvaluate readiness for Evaluate readiness for opening to trafficopening to traffic
Field Test for Micro/SlurryField Test for Micro/Slurry
ApproachApproachLiterature review / select Literature review / select candidate test methodscandidate test methodsLimited experimental studyLimited experimental studyRecommendations for futureRecommendations for future
Field cohesion test (traffic time)Field cohesion test (traffic time)Field abrasion test (performance)Field abrasion test (performance)GeoGauge (traffic time)GeoGauge (traffic time)Infrared camera (traffic time, Infrared camera (traffic time, uniformity)uniformity)In situ shear tester (performance)In situ shear tester (performance)
Phase II DeliverablesPhase II Deliverables/Progress/Progress
Recommended mix design Recommended mix design / Strawman / Strawman V.3 availableV.3 availableEvaluation of promising test methods Evaluation of promising test methods / / AMT, CAT completed, ACT in progressAMT, CAT completed, ACT in progressRuggedness testing Ruggedness testing / in progress/ in progressNew and revised test methods in New and revised test methods in AASHTO format AASHTO format / AMT, CAT / AMT, CAT completed, ACT in progress completed, ACT in progress Recommended field tests for QA Recommended field tests for QA purposes purposes / in progress/ in progress
Phase III Phase III –– Pilot ProjectsPilot Projects
Identify test sectionsIdentify test sectionsDevelop site selection guidelinesDevelop site selection guidelinesDevelop test section layoutDevelop test section layout•• Control / preferred / Control / preferred / new (S3)new (S3)
Develop construction guidelinesDevelop construction guidelinesPrePre--constructionconstructionConstructionConstructionPostPost--constructionconstruction
1.51.5--Day training courseDay training courseReference manualReference manualVisual aidsVisual aidsInstructors guideInstructors guideHandsHands--on workshops:on workshops:•• Use of laboratory test Use of laboratory test
equipmentequipment•• Evaluate learning using Evaluate learning using
Training Training –– 95% completed95% completedGuidelines Guidelines –– 90% completed90% completedPilot projects / field validation Pilot projects / field validation ––completion due by fall 2008completion due by fall 2008
For more info:For more info:www.dot.ca.gov/newtech/maintenance/www.dot.ca.gov/newtech/maintenance/slurry_microslurry_micro--surface/slurry_microsurface/slurry_micro--surface.htmsurface.htm