Introduction to road materials Part 1
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Post on 15-Jul-2015
PowerPoint Presentation Lecture contentMain Conceptsa) What is road and how it's constructed b) Structure of the roadc) Responsibilities d) Main tests for soil, aggregate, concrete and asphalt Learning How to Learna) Recommended studies b) International codes c) How to get any specification and how to deal with itd) how to perform any test How to work a) Resume writingb) LinkedIn and how to deal with it c) Contracting companies A road is a path connecting two places that has been paved or otherwise improved to allow travel by sometransportations . The beginning of road constructioncould be dated to the time of the Romans. With the advancementof technology from carriages pulled by two horses to vehicles. Tutti le strade portano a Roma All roads lead toRomewas being used as early .It was based off of the ancient Roman road system where roads radiated fromthe capital of Rome.The construction of modernhighways did not begin until the late 19th to early 20th century , the Long IslandMotor Parkway was the firstroadway design for automobile use onlyHighways Is the type of roads designed to obtains the safe movement of high-speed vehicles, through the removal of intersections. Atlanta USAHannover GERBuenos Aires, Argentina.Aims from road constructionEstablishing a new communityConnecting between placesExtend and development current axes to prevent wasting time and money Road construction prior studies1- Exploring studies :Population Number activities customs and tradition favorite conveyance for transportationClimateTemperature humidity rains storms - floods EnvironmentalHazards environmental systemGeology and soilStructure stratigraphy sedimentology hydrology earthquakes geophysics pits water content classification CBR shear tests SurveySatellite images - Aerial photographs topographic maps - GPSMaterials Sources types - transportation TrafficVolume classification weights ObstructionsMountains dams rivers seas railways villages sand dunes airports factories etc At the end of this stages we selecting suitable three pathsfor road 2- Primary studiesMore detailed for above sections but work will be at the three chosen paths , making traverse for every one of them , setting in-out , then at the end of this stage we will select the best path for our road 3- Final detailed studiesMore deeply for every section in exploration studies DrawingsSoil and material studiesQuantitiesSpecifications ProfileHorizontal curvesprovides a transition betweentwo tangent strips of roadway, allowing a vehicle to turn at a gradual rate rather than a sharp cut Vertical curvesprovides a transition between two sloped roadways, allowing avehicle to negotiate the elevation rate change at a gradual rate rather than a sharp cut Cross section Lanes shoulders median - sidewalks curbs slopes - barriers bikeways infrastructures Pavement structureSoil A mixture of mineral grainsAnd solid particles with liquid and gas in the empty spacebetween the solid particles SamplingRepresentativeSizeTransportationInformation Reducing site sample to Test sizeMechanical SplitterQuartering methodMoisture content (mc%) Oven Speedy Sieve analysis Sorting the grains with same diameter and determination of particle size distribution using specified sieves What are these numbers ?Distribution curveAtterberg Limits(soil passing #40 - 0.425 mm )Plastic Limit Liquid limitCasagrand method Cone penetration methodPlasticity index PI = Liquid limit plastic limit Higher PIHigher plasticityHigher swellingHigher compressibilityHigher activityHigher volumetric change Soil classification (AASHTO) system Compaction Process of increasing of unit weight of soil by forcing soil solids into a dense state and decrease air voids TestsLab ( Proctor ) In situ (sand cone nuclear gauge )Proctor test (moisture density relation)Which Moisture content will give us maximum dry densityStandard modified LayersBlowsWeight HeightmoldSand cone California Bearing Ratio CBRPotential strength determination Sand equivalentHow much clay in the sample ? Aggregate tests -Sampling-Sieve analysis -LL , PI-Sand equivalent -Unit weight -Flat and elongated Specific gravity and absorption for coarse aggregate Specific gravity and absorption for Fine aggregate Abrasion resistance (Los Anglos) No.12 sieveSoundness test AsphaltPenetrationkinematic viscosity Softening point Thin Film Oven Test Flash pointMarshall ExtractionDensity and thickness Cement hydration- Fineness Sieve no 170- Consistency of paste- Initial setting time- Final setting timeInitial needleFinal needleCompressive strength Concrete Suspension of coarse aggregate particles in mortarmortarSuspension of fine aggregate particles in pastePasteSuspension of cement particles in water Admixtureadd to the concrete to enhancing their properties or adding a new property Chemical Water reducer , retarders , accelerators , plasticizers , add color MineralFly ash slag silica fume Red , green concrete Concrete mixer truck Slump test Temperature Cube test for concrete Compressive strength Learning How to learnMOOCRecommended studies Codes How to get themHow to deal with them Places to study Resume Make a timeBe brief Market yourselfFont , Format revise update Personal informationTarget position/career objective EducationSummary ExperienceTrainings CoursesSkills activitiesCover letter Dear .,(Intro )I would like to apply for position .., kindly find attached resume .(body)I have ...(experience or education and skills ) (End) Thank you for taking the time to consider this application and I look forward to hearing from you in the near future.Yours sincerelyYour name Network Family , friends , neighbors, professors, beers Online (companies websites )By hand Header Experience Summery Recommendation Awards Volunteer workSkills & Courses Education Companies Develop your selfApply what you learn Dont be afraid of work problems Help others Further reading Soil mechanics , CarigPrinciple of geotechnical engineering ,Barja DasConcrete technology , john newmanNeville, A.M. and Brooks, J.J.," CONCRETE TECHNOLOGY", ELBS .1990.Asphalt Institute-The Asphalt Handbook. No 4 (1989)AASHTO( American association of state highway and transportation officials)ASTM(American society of testing materials ) ... .... .... ....... Special thanks to https://www.facebook.com/groups/ZG.UP.Team/Regards , AmrElgabry eg.linkedin.com/in/amrelgabry/https://www.facebook.com/amrelgabry17/Chart170115220300320Penetration (inches)Load on Piston (psi)Sheet10.025700.051150.12200.23000.4320Sheet2Sheet3
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