ETC 1250 Lesson 03d - Lesson 3d Types of Asphalt Pavement...

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Unformatted text preview: Lesson 3d Types of Asphalt Pavement ETC1250 — Properties of Materials Construction . Chapter #3 Plant MIX — duh, Mixed at a Plant - Pg 109 - 149 Mixed-in-Place (Road Mix) — surprisingly obvious — Asphalt sprayed on an aggregate bed and Mixed-in- Place. Slurry Seal — Continuous process sealing machine, seals existing roadbed Recycled Asphalt Concrete Asphalt Spray Applications Mill and Fill - Existing pavement is milled off and hauled to hot mix surface Treatments and seal Goats processing plant — Surface Treatments - Milled asphalt is processed with new to produce . A sprayed_on asphalt 1" or less to awearing reclaimed asphalt surface ’ ' - Restores waterprooflng - Arrest any scuffing of the old surface - Addition of aggregate on top improves traction - Reclaimed asphalt is returned to construction site. — Seal Coats - Treatments that have waterproofing or texture improvement as their main purpose Asphalt Spray Applications Asphalt Spray Applications Tack Coats and Prime Coats are thin asphalt Penetration Macadam coatings applied to subsurface materials to - mac-ad-am (m e—kéd-em) n. improve the bond between it and a new Pavement made of layers of compacted broken pavement placed over it. stone, now usually bound with tar or asphalt [After John Loudon McAdam (1756-1836), - The tack coat is used where the subsurface is an Scottish civil engineer_] old asphalt concrete or brick pavement. - The prime coat is used over granular materials FIUid asphalt is Sprayed into eaCh successwe — It acts as a transltlon material and a bond lmprover layer to bind Stones togemer- between the granular base and the new asphalt pavement. Estimating Asphalt Concrete Estimating Asphalt Concrete Small Jobs Large Jobs (assume 2” lthk) divide by 80 ftzfton Larger paving estimates-are based upon the unit weighrofthe asphalt concrete. As- phalt concrctc’s unit wright will range from 140 to 150 lb per cu ft. The formula used is: - In other words: 2000 TI? ' — One ton of As hall is used for ever 80 s uare feet of p y q where T : Ions 0fa5pl1all amen-u: required paved area A = arra lo be paved in sq ft x = thickness of pavement "1 Ft mp“ uw = unit weight of asphalt concrete Area to be paved = 2600 sq ft Thickness = 2 in. mm 2600 sq ft H Area to be paved = 150,000 sq ft 80 sq futon ‘ 32's "m Thickness = 3 1n. = 0.25 fl‘ Unit weight of asphalt cnncmtc = 150 lbv'cu ft T _ 180,000 sq ft X 0.2.5 ft X ISO lbj'cu fi '_ ' “— 2000 lb/ton T = 3375 tons The Paving Operation Auxiliary Equipment Pm” "mm"! ammlng hutumctnr The asphalt mix is brought to the paving site in A5 “a” DlSTrlbUlor . . . . onsists of a truck or trucks and deposrted directly Into the paver or In trailer on which is windrows in front of the paver mounted an _ awwwmm I WEWWWM a Sway-bilonnnolommtm ' - heatin s stem Emirmozfm The paver then spreads the mix at a set Width 9 y w n I The distributor has a and thickness power driven pump‘ I - . _ and a System of hnlngnmo ‘ gumWW The pavers screed wrll partially compact the mix spra bars and I Lae- man: I nozz es through “ma. as It moves forward Whit“ the hat liqUid n u a asphalt is sprayed um... Hmcmetel is; After the paver has spread the mat, the rollers onto the construction k com pact it to its required density surface as a Prime 0r mu) ' ‘ tack coat smuna- Fuolnum: . nomm Auxi|iary Equipment Asphalt Roofing Products Unit of measure is 100 square feet of exposed roofing Grader f. _' _. material, commonly called "1 square” - Occasionall used to spread ._ - ._ ' ' _ thin layer 0 asphalt _ _ - 1 square of roofing felt is about 120 f12 - 1 square of shingles may be about 220 ft2 6 . Windrowing Equipment - Roadtec calls them “Material Transfer Vehicles” Asonan snnqhs Fascia Asphalt Roofing Products Asphaltic roofing materials are produced either from organic felt sheets or inorganic glass fiber mats Sheets are impregnated with saturant asphatts (softenin points of 10_D—160F), then coated with coating asphalts softening pomt up to 260F) Some ofthe asphalt products are then coated with granular materials to protect the asphalt from light and offer weathering protection The materials are produced on automated equipment which produces a Continuous strip of rooting materiais which may be cut to shingle sizes or run off in rolls for roll roofing m13||||nfi Mlmiws ‘iMfllll'i Aisha :niim':.lia""' t'.n:im;n-Ii {mu- r- » laurmriuq nub!" “mini-m- wuinyi-mmi Win! rmINI lilrli'. Asphalt lmpregnated Roofing Materials Saturated Felt [Felt Paper, Roofing Felt) - Asphalt—impregnated, organic- based felt - Typically used as: — underlayment between the roof deck and the roofing material — Layered in with asphalt to produce a built—up roof - Saturated felt is commonly available in 2 weights in the U.S. — No. 15 originaliy weighted 15 pounds per square — No. 30 originaliy weighted 30 pounds per square Asphalt lmpregnated Roofing Materials Smooth Surfaced Roll Roofing [Coated Felt} - Smooth-surfaced roll roofing covered with ground talc or mica Used primarily as flashing to seal the roof at intersections and protrusions For providing extra deck protection at the roofs eaves and valleys Asphalt lmpregnated Roofing Materials Shingles. - Asphalt shingles are the leading choice for residential roofing in the United States because they provide: — Quality — Durability — Versatility — Economy Four out of five homes are roofed with asphalt shingles Asphalt lmpregnated Roofing Materials S ecialty-Eaves Flashings ( eel and Seal®} - Self-adherin . polymer-modified bituminous s eet material for s ecial flashing apptications a ong roof eaves and in other areas - used particularly in regions where ice dams and water backups are common Recommended as secondary water resistance in Hurricane prone areas Available up to 5 foot widths to be used as single ply roofing Asphalt lmpregnated Roofing Materials Minerai-Surfaced Roll Roofing - The top surface of the roll is imbedded with mineral granules used alone as a primary roof covering most frequently on small or secondary-use buildings such as supply buildings, barns, garden sheds, etc - Sometimes used as the underlayment of a tile roof, and as valley flashing on tile roofs Other Asphalt Roofing Materials Other Asphalt Roofing Materials Flashing cements (cutback) Roof coatings {emulsified or cutback) - Processed to remain elastic through the normal - Thin liquids applied with brush or by spraying to temperature ranges of summer to winter resurface old roofs Used as part of a flashing system at point-of vertical Generally one-component products that can be applied intersection such as where the roof meets awall. directly from the container chimney. or vent pipes Remain elastic through the normal temperature ranges of summer to winter Lap cements {cutback} - Thinner than flashing cements - Used to make a water-tight bond between laps of roll roofing Built-up Roofs Built-up Roofs Whom The built—up roof is used on flat _ . The last asphalt application is a roofs flood coat which is immediately covered with mineral aggregates Consists of alternate layers of before it cools roofing felt and asphalt covered with an aggregate coating Asphalts used for built—up roofs are softer asphalts and have greater temperature susceptibility so that they soften and flow The hot asphalt is mopped or I _ slightly during warm weather distributed by hot—asphalt -' _ Why? applicators and covered with ' roofing felt in layers until the last coat ofasphalt is applied, depending upon the number of plies specified . Roofing asphalt is heated in an asphalt kettle. Asphalt Pipe Coatings Asphalt-wrapped systems - prime coat followed by either one or two applications of asphalt enamel in conjunction with one or more layers of reinforcing and Asphan spray Mu|ch protective wrapping _ (Asphalt is the mulch) The wrapping material is asphalt-saturated felt or asphalt-saturated glass wrap - Thin film of emulsified asphalt sprayed on the newly seeded area Mastic systems 1. holds the seed in place against erosion . Consists ofa prime coatfonowed by a coating ofa dense 2. By virtue of its dark color, it absorbs and conserves solar heat impervious. essentially voidless mixture ofasphalt, mineral during the germination PeriOd aggregate, and mineral filler. The minimum thickness is usually 1 in 3- It h0|d5 mOlSlure in the 50”. Dmmming Speech! Plant QTOMh - The finished mastic coating is usually coated with whitewash. Asphalt Mulch Treatments Interior coating systems - Consists ofa prime coat followed by a centrifugally cast layer of asphalt enamel about 1332 in. to 3f32 in. thick Asphalt Joint Materials Asphalt Mulch Treatments Asphalt between joints in concrete slabs allows expansion ASphalt Mulch Tle.down and contraction of slabs. {Asphalt ties the mulch together) - Either of two methods 1 . - Liquid asphalt poured into joint - Asphalt impregnated fiber board is inserted in thejoint Spread straw or hay on the graded slope Follow with a mixture of seed, fertilizer, and water sprayed over the mulch The liquid passes through the mulchtothe soil Liquid asphalt is then sprayed over the mulch to lock it in place Spread the seed and fertilizer on the prepared soil followed by spraying the asphatt and mulching material simultaneously Assignment - Page 149 1) Review Questions 19, & 23 2) Describe briefly the process for laying a built-up roof If you do not understand a question, email me at tomlinmfiDthcedu or through myPHCC.edu TECHNICAL DATA SHEET Henry. HE108 - LAP CEMENT .ll CHOICE OF P'IIGFEESIOHAIS‘ Last Rev Date: 10:? 8.52008 Physical Properties |K Appearance Flash Point Suspendability Liquid 1050 F (ASTM D-3278) good Asphalt By Weight Maximum VOC Viscosity 49 - 57% (ASTM D-41, Type I) 300 gfl Saybolt Furol 25-125 sec. (ASTM D- 41, Type I) Brookfield Viscosity Needle Pen Viscosity Water By Volume 75-125 cPs (ASTM D-2196) Asph Residue 20-50 dmm @ 77°F <0.5 (ASTM D-41, Type I) (ASTM D-41) Color Solids By Weight Weight Per Gallon Black 49 - 57 % 7.4-7.8 lbs (ASTM D4475) Consistency @ 77° F Thick liquid with tenacious adhesive qualities Approvals and Certifications Manufactured to meet the requirements of ASTM D3019 Type I, Grade 1. Description HE1D8 - LAP CEMENT is a non-fibered black liquid adhesive made from roofing asphalt and petroleum solvents. NOT TO BE SOLD IN SOUTHERN CALIFORNIA OR OTC STATES. HE108 - LAP CEMENT is recommended for sealing laps or seams in nailed-on conventional cap sheet roll roofing, to seal nail heads, and to protect them against wind and rain. Coverage Approximately 200 linear feet of 2” lap per gallon. Avoid over application. On old or badly weathered roofing, two coats may be required. Material should soak into and not flood the surface. Over application can cause run-off of the adhesive in hot weather. DO NOT OVER APPLY. Surface Preparation Surfaces must be clean and free of dirt, debris, and moisture both on and beneath the surface. Sweep area thoroughly to remove all foreign matter that would interfere with a good bond. Application HE1D8 - LAP CEMENT is ready to use. No thinning is required. Stir adhesive thoroughly. Apply with a paint brush between side and end laps of roofing before nailing. After nailing, apply an additional coat to seal nail heads and protect nails from rusting. Note: Do not attempt to bond laps with HE1D8 - LAP CEMENT unless roofing nails are also used, spaced 9" apart minimum, or in accordance with roofing manufacturer's instructions. Do not use to bond roll roofing to roof decks. For full coverage application use a Cold Process Roof Adhesive. Precautions Do not apply if there is to be rain within 48 hours after application. In cold weather, store at room temperature for 24 hours prior to application. Do not heat container or store at temperatures greater than 110° F. When transporting this product, be sure the pail is secured and the lid is tight. Do not allow pail to tumble as this may loosen the lid and allow leakage to occur. CLOSE AIR INTAKES ON ROOF UNTIL SOLVENTS DISSIPATE! Not all APP torch down membranes are alike and as such application of HE1D8 - LAP CEMENT over APP membranes may not yield satisfactory results. Please contact the Technical Service Henry Company — 909 NORTH SEPULVEDA BLVD, EL SEGUNDO. CA 90245 Technical Services — 800—486—138 Email: techservices@henw.com 1!.I’lMlM henn.‘ an Department and the APP membrane manufacturer before proceeding. This adhesive is not recommended for solvent sensitive insulation, wood shingles or wood fiashings, gravel, rubber or PVC sheet roofing, shingles of any kind, or old roofs that are too dry and brittle to withstand the shrinkage stresses that occur after the application of any adhesive. Not recommended with organic felts or light-weig ht ply sheets. DO NOT USE with #15 or #30 saturated felts. Not intended for use on slopes of less than 2" in 12". Do not use this product as a coating, or to attempt to seal gravel, rubber, or PVC sheet roofing, or shingles of any kind. Exposed sealant tends to soften in hot weather. Do not walk on roof after application in order to avoid tracking. Allow to cure 3 to 4 months before applying a reflective fibered aluminum coating. NOTE: - Preventive Maintenance - Sunlight causes all asphalt products to from a watersoluble residue, especially during the first summer after application. This residue is usually flushed away by rain. But during periods of no rain, the residue is dissolved by dew and can run down and stain the sides of buildings not protected by gutters. To prevent this staining, periodically hose down the roof surface and walls. Prompt scrubbing with water and detergent will usually remove any stains that have occurred. As the potential of staining is a normal characteristic of all asphalt-based adhesives and since staining can be prevented by routine maintenance, we, the manufacturer disclaim any liability. Cleanup Remove product from tools, etc., with kerosene or mineral spirits. Clean hands with a waterless hand cleaner. Caution CAUTION! COMBUSTIBLE! KEEP OUT OF REACH OF CHILDREN. Contains petroleum distillate. Keep away from heat and flame. Do not heat container or store at temperatures greater the 110° F. CLOSE AIR INTAKES until solvents dissipate. Contains volatile solvents that might contaminate potable water. Close container after use. Dispose of container and unused contents in accordance with Local, State, and Federal regulations. DANGER! HARMFUL OR FATAL lF SWALLOWED! If swallowed, do not induce vomiting. CALL A PHYSICIAN IMMEDIATELY! Use protective measures to avoid contact with eyes and skin. In case of eye contact, open eyelids wide and flush immediately with plenty of water for at least 15 minutes. GET MEDICAL ATTENTION. USE ONLY WITH ADEQUATE VENTILATION! If you experience eye watering, headaches, or dizziness, leave area immediately or increase fresh air or wear respiratory protection (NIOSHIMSHA TC 230 or equivalent). Repeated and prolonged occupational overexposure to solvent vapor may cause permanent brain and nervous system damage, and may cause liver or kidney damage. WARNING: This product contains detectable amounts of chemicals known to the State of California to cause cancer, or birth defects, or other reproductive harm. EMPLOYERS should obtain a copy of the Material Safety Data Sheet (MSDS) from your supplier or directly from Henry at the toll free number or website below. NOTICE: Reports have associated repeated and prolonged occupational overexposure to solvents with permanent brain and nervous system damage. lntrentional misuse by deliberately concentrating and inhaling the solvents may be harmful or fatal. To avoid breathing vapors or spray mist, open windows and doors (if used inside) or use other means to ensure fresh air entry during application and drying. If you experience eye watering, headaches, or dizziness, increase fresh air or wear respiratory protection (NIOSHI'MSHA TC 230 or equivalent) or leave the area. Product Sizes GALLON (9 lb) 5 GALLON (42 lb) Limited Warranty We, the manufacturer, warrant only that this product is free of defects, since many factors which affect the results obtained from this product - such as weather, workmanship, equipment utilized and prior condition of the substrate - are all beyond our control. We will replace at no charge any product proved to be defective within 12 months of purchase, provided it has been applied in accordance with our written directions for uses we recommended as suitable for this product. Proof of purchase must be provided. DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY: THIS LIMITED WARRANTY IS IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FOR A PAR110ULAR PURPOSE. MANUFACTURER SHALL HAVE NO LIABILITY OF ANY KIND BEYOND PRODUCT REPLACEMENT, INCLUDING FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES RESUL11NG FROM ANY DEFECTS OR ANY DELAYS CAUSED BY REPLACEMENT OR OTHERWISE. THIS LIMITED WARRANTY PROVIDES THE PURCHASER'S EXCLUSIVE REMEDY FOR ANY DEFECT IN THE PRODUCT. Henry Company — 909 NORTH SEF'ULVEDA BLVD, EL SEGUNDO, CA 90245 Technical Services - 800—486—138 Email: techservices@henry.com wwwhenrycom ...
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This note was uploaded on 01/05/2011 for the course DRAFTING A ETC 1250 taught by Professor Tomlinson during the Spring '10 term at Pasco-Hernando Community College.

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ETC 1250 Lesson 03d - Lesson 3d Types of Asphalt Pavement...

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