This Standard Technical Specification is subject to change without prior notice. The most recent issue will at all times be located on the Norurl web site, www. In this Document the following words and expressions shall have the meaning hereby assigned to them except where the context otherwise requires: Engineer: The Owner or any person or organization employed or engaged at any time by the Owner and authorized by the Owner, in writing, from time to time to act on behalf of the Owner in the execution of the items covered by this Document, in whole or in any part, for any or all purposes provided in this Technical Specification. International codes and standards The following documents give support to or are referred to in this specification. European standards and publications: EN EN ST EN ST EN Methods of testing cement Cement - Part 1: Composition, specifications and conformity criteria for common cements Concrete - Part 1: Specification, performance, production and conformity Tests for geometrical properties of aggregates Part 2: Determination of particle size distribution Test sieves, nominal size of apertures. Admixtures for concrete, mortar and grout Part 2: Concrete admixtures - Definitions and requirements Copper and copper alloys Plate, sheet, strip and circles for general purposes Eurocode 1: Basis of design and actions on structures Eurocode 2: Design of concrete structures Eurocode 4: Design of composite steel and concrete structures Testing of fresh concrete Testing of hardened concrete Aggregates for concrete Common rules for precast concrete products.
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This Standard Technical Specification is subject to change without prior notice. The most recent issue will at all times be located on the Norurl web site, www. In this Document the following words and expressions shall have the meaning hereby assigned to them except where the context otherwise requires: Engineer: The Owner or any person or organization employed or engaged at any time by the Owner and authorized by the Owner, in writing, from time to time to act on behalf of the Owner in the execution of the items covered by this Document, in whole or in any part, for any or all purposes provided in this Technical Specification.
International codes and standards The following documents give support to or are referred to in this specification. European standards and publications: EN EN ST EN ST EN Methods of testing cement Cement - Part 1: Composition, specifications and conformity criteria for common cements Concrete - Part 1: Specification, performance, production and conformity Tests for geometrical properties of aggregates Part 2: Determination of particle size distribution Test sieves, nominal size of apertures.
Admixtures for concrete, mortar and grout Part 2: Concrete admixtures - Definitions and requirements Copper and copper alloys Plate, sheet, strip and circles for general purposes Eurocode 1: Basis of design and actions on structures Eurocode 2: Design of concrete structures Eurocode 4: Design of composite steel and concrete structures Testing of fresh concrete Testing of hardened concrete Aggregates for concrete Common rules for precast concrete products.
Execution of concrete structures - Part 1: Common Data elements and interchange formats Information interchange Representation of dates and times Quantities and units Part 0: General principles Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings SI units and recommendations for the use of their multiples and of certain other units Tests sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth Tests sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate Concrete Determination of static modulus of elasticity in compression.
Data elements and interchange formats Information interchange Representation of dates and times Steels for reinforcement of concrete - Dimensions and properties - Part 3: Ribbed bars BC Structural use of concrete Design and construction - 6. Other regulating requirements IBC Byggingarregluger nr. Submittals The Contractor shall submit the following data and documents to the Engineer for inspection and approval in ample time before the relevant item is needed for the.
The ample time period shall be directed by the Engineer after consultation with the Contractor. The design shall include i. A certified mill report for each delivery lot of reinforcement. Lift drawings and all detail drawings necessary to ensure the proper construction of each part of the Works.
Detailed reinforcement drawings and bar lists prepared on the basis of the Drawings, which will indicate only the main structural reinforcement required in the structures. These reinforcement drawings and bar lists shall be submitted to the Engineer for approval 28 days prior to cutting of reinforcement. Information on facilities for batching, mixing, transporting and testing concrete, i.
In ample time prior to start of concreting operations the Contractor shall apply for the Engineer's inspection and approval of installed reinforcement and embedded items.
The Contractor shall apply in writing to the Engineer for issue of a "Concrete pour clearance" not less than 24 h prior to placing of a concrete lift. All Page 4 of 24 The Concrete pour clearance, prepared in triplicate, shall i.
The Contractor shall not later than 14 days prior to concreting operations submit to the Engineer various information concerning his concrete activities, i. The Contractor shall submit his "Production control manual" cf.
The Contractor shall without undue delay submit to the Engineer any requested information concerning his inspection and control of the concrete work.
The Contractor shall submit his structural calculations and production drawings for prestressed concrete elements to the Engineer for approval.
Such preparation includes i. Preparation of foundation. All fills and natural base materials on which concrete shall be placed must be adequately compacted with vibratory equipment suited to the conditions as directed by the Engineer. Treatment of rock or gravel foundation prior to placing of reinforcement is described in 7. Preheating of concrete foundation in cold weather is described in Falsework and formwork Forms for outside concrete corners shall be chamfered 30 30 mm, except otherwise shown on the Drawings or directed.
Form ties shall generally be of the cone and rod type or other approved type for waterproof concrete members. The embedded metal rods shall terminate not less than 50 mm inside the formed face of the concrete, unless otherwise approved. A hole left in a face by a fastener shall be filled by an approved method, cf. Form ties in sheath pipes may, if approved, be used through walls that are not subject to unilateral water pressure. The sheath pipes shall subsequently be cut at least 50 mm inside the concrete surface and the hole filled with concrete, unless otherwise approved.
Form ties shall be placed in approved patterns appropriate for the particular structure. Limited amount of formoil shall be used, especially on the lower part of walls. Geometrical tolerances The falsework and formwork shall be constructed so that deviations of the completed structure do not exceed the tolerances specified in standard ENV , 10 Geometrical tolerances, and annex F, Guidance on geometrical tolerances, unless otherwise directed. The following requirements supersede the general tolerances given by the standard:.
Surfaces not Surfaces exposed exposed to view to view mm mm Elevations Horizontal location Deviation from a 2 m long straight-edge or appropriate ruler 2 3 25 50 20 10 10 6.
Geometrical tolerances indicated on the Drawings or directed by the Engineer supersede the preceding requirements. Accepted deviations from true line and grade shall not be cumulative. Forms for subsequent concrete placement shall be aligned back to true line and grade as soon as possible with due consideration to the requirements of surface irregularities. Requirements of surface irregularities are specified in 6. Tolerances for placement of embedded items are specified in 7.
Joints Joints in concrete are either movement deflection, expansion or contraction joints or construction joints. Movement joints shall be constructed as shown on the Drawings. The Contractor shall i. No reinforcement or fixed metal embedded in the concrete shall be continuous through a movement joint, except where expressly shown on the Drawings or directed. Construction joints are the common boundaries of concrete lifts, or boundaries of prefabricated elements and in-situ concrete, not separated by a movement joint.
Generally construction joints will not be shown on the Drawings. Location of construction joints not shown on the Drawings or directed shall be proposed by the Contractor on lift drawings submitted to the Engineer for approval. The face of a construction joint where watertightness is required must be appropriately prepared mechanically or by 30 - 40 MPa water jet prior to the placing of the subsequent lift of fresh concrete.
The preceding concrete lift shall be saturated by water but surface dry when the successive lift is placed. At horizontal construction joints on exposed surfaces, forms shall be constructed with strips to produce a straight joint at the exposed surface, unless otherwise directed. Waterstops Waterstops shall be installed as shown on the Drawings or as directed. Detailed information on all waterstops, their properties, installation and standard support, shall be submitted to the Engineer for approval.
No waterstop not approved shall be used in the Work. Manufacturer's instructions shall be followed closely. Preformed junctions shall be used where appropriate. Waterstops must be properly installed prior to placing of concrete so as to form a continuous watertight diaphragm in each joint. Dislocation by the concreting operation must be prevented in an approved manner. For general civil work three types of waterstops are foreseen: Type A thermoplastics sunken sealing strips for construction joints, type D thermoplastics sunken sealing strips for movement joints, and type C - injection tubes, where strips are not appropriate.
Bond breaker Bond breaker shall be applied where indicated on the Drawings and be of the type shown or as directed.
The material used for bond breaker must be approved by the Engineer for each case. Expansion joint filler A filler shall be provided in expansion joints as shown on the Drawings or as directed. Any material used for expansion joint filler must be approved by the Engineer. Joint backing rods shall be compatible with the joint sealant and shall be the type recommended by the sealant manufacturer.
Joint sealant Field moulded joint sealants shall be either hot or cold applied materials which, upon curing, form an impermeable barrier to water, debris and any specified chemicals. The cured materials shall be elastic, cohesive and remain adhered to the joint faces throughout the range of joint movement or service temperatures.
The sealants shall not be adversely affected by aging or weathering. Page 8 of 24 No primer is required with this material. The manufacturers recommended primers shall be used with these sealants. Silicone rubber sealant of adequate quality. Backer rods with silicone treatment shall be used. Sealants in vertical joints in walls or horizontal joints not subject to traffic shall be either polysulfide or polyurethane compounds, cold applied at a nonsag consistency.
Preformed joint sealer shall have straight and parallel sides, shall be of virgin crystallisation-resistant noeprene, and shall be compatible with the concrete and with the lubricant adhesive used for installation.
A lubricant-adhesive approved by the sealer manufacturer shall be used in the installation of the preformed sealer. At least 56 days before its intended use, the Contractor shall submit to the Engineer a sample of the proposed sealing compound together with the manufacturer's technical data and the details of the recommended method of application. Relief drains Relief drains for reducing water pressure under or behind concrete structures shall be installed and embedded where shown on the Drawings or as directed.
The construction of the relief drains and materials for them are specified on the Drawings. The relief drains must be properly installed prior to placing of concrete to form a continuous drain system. Penetration of dirt or concrete fines into the drains must be prevented in an approved manner. Generally the surface shall be free from honeycombs, segregation, loss of cement or fine material, damage due to stripping of forms, boltholes, abrupt irregularities caused by movement of forms or their components, loose knots and similar features and bulges or depressions in the general plane of the surface.
Care shall be taken to keep uniform colour of concrete surfaces permanently exposed to view, both regarding different lifts and repairs, unless otherwise directed.
Tolerance requirements for concrete surfaces are specified in 6. Geometrical tolerances for structures are specified in 5. Formed surfaces The classes of finish for formed surfaces are designated F1, F2. Minor blemishes caused by entrapped air or water will be accepted.
The surface treatment after removal of forms includes i. After removal of forms, the surface shall be improved by removing all fins and other projections, washing down, and the filling of the most noticeable blemishes. Form-tie holes shall be filled along with all voids as specified. In general, not more than 50 air voids of 5 - 15 mm diameter per m will be accepted.
Air voids exceeding 15 mm in diameter shall be repaired. When filling holes and repairing defective areas of permanently exposed surfaces, effort shall be made to match the colour of the concrete. The use of release agents which may permanently stain or discolour the finished surface will not be permitted. Unformed surfaces The classes of finish for unformed concrete surface are designated as U1, U2 and U3.
01 04 2016
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24 01 2014
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