7 6 ok CW2C OTHERS OF BRIDGE

CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 OTHER WORK ITEMS OF BRIDGE 1/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 TABLE OF CONTENTS I RAILINGS II BRIDGE BEARINGS III WATERPROOFING IV EXPANSION JOINTS V BRIDGE DRAINAGE 2/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 I RAILINGS MATERIALS STEEL RAILING Nuts and bolts not designated as high strength shall conform to the requirements of ASTM A 307, and steel tubing shall conform to the requirements of ASTM A 500 ALUMINIUM RAILING For aluminium railings or portions of railings, cast aluminium posts shall conform to the requirements of AASHTO M 193, and extruded components shall conform to the requirements of ASTM B 221M WELDING All exposed welds shall be finished by grinding or filing to give a smooth surface Welding of aluminium materials shall be done by an inert gas shielded, electric arc welding process using no welding flux Torch or flame cutting of aluminium will not be permitted INSTALLATION Metal railings shall be carefully adjusted prior to fixing in place to ensure proper matching at abutting joints, correct alignment, and camber throughout their length Holes for field connections shall be drilled with the railing in place on the structure at proper grade and alignment Unless otherwise specified in the Contract Document, installation tolerance for railing height shall be -10 to +20 mm All bolts and nuts shall be point welded to each other Where aluminium alloys come in contact with other metals or concrete, the contacting surfaces shall be thoroughly coated with a dielectric aluminium-impregnated caulking compound, or a synthetic rubber gasket may be placed between the two surfaces II BRIDGE BEARINGS MATERIAL REQUIREMENTS REFERENCE STANDARDS AASHTO Standard Specifications for Highway Bridges and the following Standards in their latest edition shall be particularly applied to the works covered by this Specification Section ASTM A36 Carbon Structural Steel ASTM A123 Zinc (Hot-Dip Galvanized) Coating on Iron and Steel Products ASTM A570 Steel, Sheet and Strip, Carbon, Hot-Rolled, Structural Quality ASTM A615 Deformed and Plain Billet-Steel Bars for Concrete Reinforcement ASTM C881 3/ 13 Epoxy-Resin-Base Bonding Systems for Concrete PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 ASTM C1107 Installation of Load Bearing (Transverse and Axial) Steel Studs and Related Accessories ASTM D412 Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomer Tension ASTM D429 Rubber Property-Adhesion to Rigid Substrates ASTM D518 Standard Test Method for Rubber DeteriorationSurface Cracking ASTM D573 Rubber Deterioration in an Air Oven ASTM D746 Brittleness Temperature of Plastics and Elastomers by Impact ASTM D1149 Rubber Deterioration - Surface Ozone Cracking in a Chamber ASTM D2240 Rubber Property Durometer Hardness ASTM D3182 Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets ASTM D3183 Preparation of Pieces for Test Purposes from Products ASTM D3184 Evaluation of NR (Natural Rubber) ASTM D3185 Evaluation of SBR (Styrene-Butadiene Rubber) Including Mixtures with Oil ASTM D3186 Rubber-Evaluation of SBR (Styrene-Butadiene Rubber) Mixed With Carbon Black or Carbon Black and Oil ASTM D3187 Evaluation of NBR (AcrylonitrileButadiene Rubber) ASTM D3188 Evaluation of IIR (Isobutene-Isoprene Rubber) ASTM D3189Evaluation of Solution BR (Poly-butadiene Rubber) ASTM D3190 Evaluation of Chloroprene Rubber (CR) ASTM D3192 Carbon Black Evaluation in NR (Natural Rubber) ASTM D3192 Carbon Black Evaluation in NR (Natural Rubber) ASTM D4014 Plain and Steel-Laminated Elastomeric Bearings for Bridges SAE 1020 Specifications for Rolled Strip Specifications for Finish and Gauge ELASTOMERIC BEARINGS 2.1 ELASTOMERIC MATERIALS The elastomeric materials of the compounds shall be either natural rubber or 100% virgin polychloroprene synthetic rubber meeting the requirements of Table.1 The properties of the elastomeric compounds shall be determined from test specimens complying with ASTM 4/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 D3182 through D3190 inclusive and D3192 A variation of ± 10% in tensile strength and ultimate elongation under “physical properties” will be permitted when test specimens are cut from the finished product 2.2 INTERNAL STEEL LAMINATES The internal steel laminates for the laminated elastomeric bearing pads shall be rolled carbon steel sheets complying with ASTM A 570 or ASTM A36 2.3 LAMINATED ELASTOMERIC BEARING PADS Laminated elastomeric bearing pads shall be individually moulded to the required size Corners and edges may be rounded with a radius at the corners not exceeding mm and a radius at the edges not exceeding mm All edges of the steel laminations shall be covered with not less than mm and not more than mm of elastomer Requirements of Elastomeric Bearing Pads ASTM Standard D2240 D412 Physical Properties Value Hardness, ASTM D2240 60 ± Tensile strength, min.kg/cm2 175 Ultimate elongation, min.% 350 Heat Resistance D573, 70 HR at 100°C Change in durometer hardness, max.points Change in tensile strength, max % Change in ultimate elongation, max % + 15 - 15 - 40 Compressive Set D395 22 hours at 100°C max % 35 Method B Ozone D1149 5/ 13 100 pphm ozone in air by volume, 20% strain, 37.7 ºC  1C, 100 hours mounting Procedure D 518, No Cracks PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 Procedure A Adhesion Bond made during vulcanization 80% R(Z1) D429, A Bond Strength (per square cm) 2.8kg D429, B Peel Strength (per cm of width) kg The dimensions of the elastomeric bearings shall be within the following listed tolerances: Overall Vertical Rubber Dimension Average total rubber thickness 32 mm or less -0, +3 mm Average total rubber thickness over 32 mm -0, +6 mm Overall Horizontal Rubber Dimension 90 cm or less 0, + mm Thickness of individual layers of elastomer (60 Durometer Only) 20% Variation from a plane parallel to the theoretical surface per 300 mm tops 1.5 mm sides mm Edge cover of embedded metallic laminate mm mm max The rubber laminates shall be of uniform integral units, capable of being separated by mechanical means into separate, well-defined elastomeric layers The ultimate breakdown limit of the elastomeric bearing under compressive loading shall be not less than 140 kgs/cm2 In addition to the requirements of Table No 1, the stressstrain relationship of the finished elastomeric bearings at room temperature shall not exceed the following limitations 6/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 Compression Stress 35 kg/sq.cm 56 kg./sq.cm Strain (Percent of total thickness of all 5% 7% elastomer laminations The Contractor shall furnish to the Engineer a certification by the manufacturer that the elastomer, in the elastomeric bearing pads to be furnished conforms to all of the above requirements The certification shall be supported by a certified copy of the results of tests performed by the manufacturer upon samples of the elastomer to be used in the pads MECHANICAL BEARINGS Bearings shall have surface requirements and procedures protecting in accordance with noted under Specification section 07800 3.1 BEARING INSTALLATION The bearings shall be clearly marked with their longitudinal and transverse axes, their type number and their intended locations in the Works Unless otherwise approved by the Engineer bearing beds shall be of non-shrink grout conforming to ASTM C1107, Grade A with compressive strength 50MPa, and should be proposed by the Contractor for approval by the Engineer Grout should have flow characteristics such that the volume of the bed or plinth is completely filled with homogeneous material when placed at the ambient temperatures, and having physical and chemical properties compatible with the adjoining surfaces Proposals for the thickness and type of bearing plinths and beds shall be submitted by the Contractor and approved by the Engineer in advance of bearing installation Anchor bolts shall unless otherwise specified on the Drawings or otherwise approved by the Engineer conform to ASTM F1554 Grade 55 Anchor bolts shall be either threaded full length or equipped with a satisfactory mechanical end anchorage Details for any mechanical end anchorage shall be included in the shop plans submittal for prior approval All nuts shall be ASTM A563 Heavy Hex Grade DH Steel dowels shall be provided and installed in accordance with requirements and with accessories noted on the drawings Dowels shall be smooth plain billet-steel bars conforming to requirements of ASTM A615, 400 MPa and shall be zinc (hot-dip galvanized) in accordance with ASTM A123 Dowels may be cast-insitu as shown on the drawings or drilled and grouted with an approved epoxy compound If dowels are drilled and grouted:  7/ 13 holes shall provide at least 10 mm in diameter greater than the largest diameter of the dowel; PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450  holes shall be thoroughly cleaned with compressed air and water prior to grouting of dowels so as to remove all loose or extraneous materials;  the epoxy compound used shall be ASTM C881, Type IV or approved equivalent and mixed and placed in accordance with manufacturer’s requirements Bearings shall not be dismantled Any transit bolts, straps or other temporary fixing shall not be removed until the bearing is fixed in its final position and the structure immediately above the bearing is in place Care shall be taken to ensure that all transit bolts, straps or other temporary fixings are finally removed All bearings shall be set horizontal in both directions and shall be positioned so that the inscribed longitudinal axis is parallel to the structure axis at the point of support, unless otherwise noted on the Drawings Any devices such as steel packs used to hold bearings level whilst being fixed, must be removed so that the bearing seats only on its grout pad Where pre-cast beams and segments are placed on elastomeric bearings, immediately prior to the placing of each beam and segment the top of the bearing shall be coated with a sufficient thickness of approved mortar to take up any irregularities between the surface of the beams and segment and the bearings The installation location of bearings shall be accurately marked The area where the bearings will be seated shall be accurately levelled When arranging steel reinforcing at bearing locations, a template showing bearing stud bolt positions shall be used to prevent interference between bearing studs and steel reinforcing The characteristics of all bearing shall be within the Manufacturer’s tolerances and to the following tolerances: Alignment, maximum departure from required vertical or horizontal plane: Alignment, maximum departure from required vertical or horizontal plane: Entire assembly 1:400 Lower part of bearing 1:1000 relative to upper Plan position 8/ 13 Laterally 3mm Longitudinally 6mm Center/Center Spacing 3mm PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 3.2 TESTING OF BEARINGS The testing of selected bearings shall be arranged with the Engineer prior to their inclusion in the Works The testing shall be done at an independent testing facility approved by the Engineer III WATERPROOFING BITUMINOUS WATERPROOFING MEMBRANE The Contractor shall furnish to the Engineer certification from the manufacturer that the bituminous waterproofing membrane system has been used successfully in similar applications during the preceding five years The Contractor shall provide to the Engineer evidence that the applier of the material is a qualified, experienced applier and is approved by the manufacturer to apply his materials Primer: The furnished primer material shall be in accordance with ASTM-D41, or as approved by the Engineer Mastic: The furnished primer material shall be in accordance with AASHTO-M243, as applicable and as approved by the Engineer Asphalt: Asphalt for mop coat shall be in accordance with ASTM D449, Type III Waterproofing fabric: Asphalt saturated fabric shall be in accordance with ASTM D173 Asphalt plank: Material for asphalt plank, if used or if approved by the Engineer, shall be in accordance with ASTM D517 PRODUCT DELIVERY, STORAGE AND HANDLING The Contractor shall deliver products to the job site in their original unopened containers clearly labelled with the manufacturer’s name, brand designation, type and class as applicable The Contractor shall store products in an approved dry area and shall protect them from contact with soil and from exposure to the elements Products shall be kept dry at all times Products shall be handled in a manner that will prevent breakage of containers and damage to products PREPARATION OF SURFACE The surface to which the waterproofing is to be applied shall be cleaned of all loose and foreign materials, dirt, grease or oil and shall be dry When necessary the Engineer may require the surface to be scrubbed with water and a stif brush, after which the surface shall be allowed to dry before application of the primer Concrete to which the deck waterproofing membrane is to be applied shall be prepared in accordance with the manufacturer’s recommendations APPLICATION The deck waterproofing membrane shall be a proprietary waterproofing system as approved by the Engineer, and shall be 9/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 applied in accordance with the manufacturer’s recommendations The installation shall be undertaken by skilled operatives as approved by the product manufacturer Acceptance testing shall include testing by an electronic pinhole detector to demonstrate the absence of pinholes IV EXPANSION JOINTS REFERENCE STANDARDS The following Standards in their latest edition shall be particularly applied to the works covered by this Specification Section AASHTO M297 Preformed polychloroprene elastomeric joint seals for Bridges ASTM A36 Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling ASTM A240 Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels JIS G 5502 Spheroidal Graphite Iron Castings ASTM A123 Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products ASTM A588High-Strength LowAlloy Structural Steel 50ksi Minimum Yield point ASTM D395 Rubber Property—Compression Set ASTM D412 Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomer - Tension ASTM D471 Rubber Property - Efect of Liquids ASTM D994 Preformed Expansion Joint Filler for Concrete (Bituminous Type) ASTM D1149 Rubber Deterioration - Surface Ozone Cracking in a Chamber ASTM D2240 Rubber Property - Durometer Hardness ASTM D4070 Adhesive Lubricant for Installation of Preformed Elastomeric Bridge Compression Seals in Concrete Structures ASTM D5973 Elastomeric Strip Seals with Steel Locking Edge Rails Used in Expansion Joint Sealing ASTM D6690 Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements MATERIALS METHOD OF CONSTRUCTION AND INSTALLATION The Contractor shall obtain installation instructions from the supplier of the expansion joint material and comply with the instructions provided for the installation of the joint The adequacy of the joint 10/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 design and installation details shall be subject to the approval of the Engineer The Contractor shall obtain the technical assistance of a field representative from the manufacturer of the joint during its installation Proper adjustment shall be made for temperature at the time of installation Concrete on which expansion joints are to be set shall be dry, clean and free from dirt, grease, latency and contaminants; level and sound with no broken or spilled concrete No joint shall be placed until the Engineer has inspected and approved the seat conditions After coating the seat area with the specified sealant adhesive, the joint shall be positioned over the anchor bolts and the nuts securely tightened All loose or long anchor bolts shall be corrected in a manner approved by the Engineer All joints between units, around connecting bolts, and cavity plugs shall be carefully sealed with sealant in a neat workmanlike manner to keep out water and protect against corrosion Neoprene surfaces to be in contact with sealant shall be bufed at the plant or wire brushed prior to installation to provide a bonding surface for the sealant Prior to filling the space in the bolt wells, the Engineer shall inspect the anchor bolts and the tightening of the nuts to the manufacturer’s specified torque Any wells sealed without the Engineer’s approval shall be opened and resealed after approval at the Contractor’s expense The finished joint shall present a smooth, neat appearance with no protruding bolts or rough joints Excess sealant shall be wiped or scraped away before it becomes hard PRE-MOULDED JOINT FILLER Pre-moulded joint filler shall conform to the requirements of ASTM D994 with a nominal thickness of 20 mm Joint filler must be compatible with joint sealant The filler for each joint shall be furnished in a single piece for the full depth and width required for the joint When the use of more than one piece is required for a joint, the abutting ends shall be fastened securely and held accurately to shape by stapling or other positive fastening means JOINT SEALER Joint sealer shall be in accordance with ASTM D6690 Each lot or batch of sealing compound shall be delivered to the job site in the manufacturer's original sealed container Each container shall be marked with the manufacturer's name, batch or lot number, and the safe heating temperature and shall be accompanied by the manufacturer's certification stating that the compound meets the requirements of this specification TOLERANCE OF FINGER JOINTS Tolerance of installed finger joint type expansion joints shall be as follows: 11/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 Item Tolerance Length ±5mm Elevation ±3mm Note At edges and center of carriageway Uniformity of elevation 3mm in m Differential elevation of fingers 2mm between centers of fingers Longitudinal clearance ±2mm At edges and center of carriageway Transversal clearance to +2mm At edges and center of carriageway Tolerances of other joint types shall be in accordance with the manufacturer’s recommendations TOLERANCES TO ASPHALT PAVING All joint types shall be finished nominally flush with the road surface within the tolerance of the asphaltic surfacing specification V BRIDGE DRAINAGE REFERENCE STANDARDS The following Standards in their latest edition shall be particularly applied to the works covered by this Specification Section ASTM D3034 Class 1245-B Specification for PVC pipe and fittings ASTM A48 Class 50 Specification for grey iron castings INSTALLATION Drainage catch pits and gratings shall be installed complete at the locations indicated on the drawings Catch pits shall be cast into the structure or cast into a previously formed box out as detailed in the Contractor’s method statement Where the catch pits are to be cast into a box out all relevant details shall be subject to the approval of the Engineer Where catch pits are secured into box outs using concrete, the concrete shall be at least equal in strength to the concrete in the surrounding structure and all box out faces shall be prepared as required for construction joints Gratings should be installed using antitheft measures All pipes and fittings shall be installed to the locations, lines and grades indicated in the drawings 12/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE CMDRCP / CW2C PACKAGE CW2C KM 18+200 – KM 23+450 All pipe brackets shall be located and securely fixed in place before pipes are installed 13/ 13 PHUONG THANH - QUYET TIEN - ANH GIANG – THANG LOI JOINT VENTURE ... edges and center of carriageway Uniformity of elevation 3mm in m Differential elevation of fingers 2mm between centers of fingers Longitudinal clearance ±2mm At edges and center of carriageway... furnished conforms to all of the above requirements The certification shall be supported by a certified copy of the results of tests performed by the manufacturer upon samples of the elastomer to be... to the placing of each beam and segment the top of the bearing shall be coated with a sufficient thickness of approved mortar to take up any irregularities between the surface of the beams and