1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58structures Test methods Determination of creep under sustained tensile load for synthetic resin pro
2、ducts (PC) for anchoring of reinforcing barsThe European Standard EN 1544:2006 has the status of a British StandardICS 91.100.30Products and systems for the protection and repair of concrete BRITISH STANDARDBS EN 1544:2006BS EN 1544:2006This British Standard was published under the authority of the
3、Standards Policy and Strategy Committee on 30 November 2006 BSI 2006ISBN 0 580 49621 XAmendments issued since publicationAmd. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a
4、British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of EN 1544:2006.The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/8, Protection an
5、d repair of concrete structures.A list of organizations represented on B/517/8 can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1544October 2006ICS 91.100.30English VersionProducts and systems for the protection and repair of concretestructures - Test met
6、hods - Determination of creep undersustained tensile load for synthetic resin products (PC) for theanchoring of reinforcing barsProduits et systmes pour la protection et la rparation desstructures en bton - Mthodes dessais - Mesure dufluage, sous contrainte maintenue des produits base dersine de syn
7、thse destins lancrage darmatureProdukte und Systeme fr den Schutz und dieInstandsetzung von Betontragwerken - Prfverfahren -Bestimmung des Kriechverhaltens von fr die Verankerungvon Bewehrungsstben verwendeten Kunstharzprodukten(PC) bei DauerzuglastThis European Standard was approved by CEN on 7 Sep
8、tember 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obt
9、ained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secre
10、tariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug
11、al, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means rese
12、rvedworldwide for CEN national Members.Ref. No. EN 1544:2006: EEN 1544:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Apparatus .4 5 Specimen preparation .5 5.1 Composition of the concrete test specimens.5 5.2 Preparation of moulds.5 5.3 Preparation of concrete
13、test blocks.5 5.4 Preparation of the anchoring grout .6 6 Procedure .6 6.1 Carrying out the anchoring operation .6 6.2 Storage of test-pieces after carrying out the anchoring operation6 6.3 Carrying out the test7 6.4 Measurements7 7 Test report 7 EN 1544:2006 (E) 3 Foreword This document (EN 1544:20
14、06) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2007, and co
15、nflicting national standards shall be withdrawn at the latest by December 2008. It has been prepared by Sub-Committee 8 “Protection and repair of concrete structures“, the Secretariat of which is held by AFNOR. This European Standard is one of a series dealing with products and systems for the prote
16、ction and repair of concrete structures. It describes a method of test for determining the creep of anchoring products under sustained tensile load. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
17、 Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1544:
18、2006 (E) 4 1 Scope This European Standard specifies a method for carrying out a sustained tensile load test on a reinforcing steel bar (rebar) anchored in a concrete block. The test is performed to determine the tensile creep under standard conditions, or under maximum service temperature conditions
19、 recommended by the manufacturer. The test applies to products based on synthetic resins or hybrid synthetic resin/hydraulic cements. It does not include those products intended to be used as grout around tendons used for the prestressing of concrete. 2 Normative references The following referenced
20、documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1766, Products and systems for the protection and repair of concrete st
21、ructures - Test methods -Reference concretes for testing EN 10080, Steel for the reinforcement of concrete - Weldable reinforcing steel - General 3 Principle The principle is to apply a sustained tensile load to a reinforcing bar anchored into concrete with the product to be tested, and to measure t
22、he displacement of the rebar relative to the concrete test piece over different periods of time. The test is performed using blocks of concrete type C(0,40) in accordance with EN 1766. The test is carried out at standard laboratory temperature of (21 2) C or such other temperature as specified by th
23、e manufacturer. 4 Apparatus The following apparatus is required. 4.1 One mixer for concrete. 4.2 One mixer for the product to be tested. 4.3 Moulds for the preparation of concrete blocks of minimum dimensions 400 mm x 400 mm x 250 mm. 4.4 One concrete vibrator, 25 mm diameter 4.5 One rotary percussi
24、ve drill or one diamond drill, or both, as specified by the manufacturer. 4.6 Three ribbed steel bars type B500B, diameter 16 mm, with a related rib area of 0,075 to 0,085 in accordance with EN 10080. 4.7 Devices for centring and maintaining alignment of the rebars during anchoring. 4.8 One thermome
25、ter accurate to within 1 C. EN 1544:2006 (E) 5 4.9 A room or chamber at the standard laboratory climate of (21 2) C and (60 10) % RH. 4.10 A tensile testing machine measuring load to within 2 % which controls the rate of load increase. 4.11 An apparatus capable of applying a sustained tensile load o
26、ver a period of time (A typical apparatus is given in Figure1). NOTE Any systems providing a permanent tensile load of (50 1,0) kN can be used. 4.12 A device, interlocked with the rebar during the whole test, connected to one or more displacement sensors capable of measuring relative movement betwee
27、n the anchored bar and a fixed reference point on the test block to an accuracy of 0,01 mm. 5 Specimen preparation 5.1 Composition of the concrete test specimens The test specimens shall be cast from concrete type C (0,40) as specified in EN 1766. 5.2 Preparation of moulds Test specimens shall be pr
28、oduced in a room or chamber maintained at (21 2) C. Moulds shall be non-deformable and of minimum dimensions 400 mm x 400 mm x 250 mm for a single test, or in multiples of the 400 mm dimensions for more than one test. Before filling the inner surface of the mould it should be covered with a thin fil
29、m of non reactive release material to prevent the concrete from adhering to the mould. 5.3 Preparation of concrete test blocks The concrete shall be placed and immediately compacted in three layers of approximately equal thickness and vibrated using a 25 mm diameter concrete vibrator in such a way a
30、s to produce full compaction of the concrete with neither excessive segregation nor laitance. For a block for a single test the vibratory operation shall be carried out at four points, each position being equidistant and at about 125 mm from the two adjacent faces. For larger blocks with dimensions
31、greater than 400 mm x 400 mm x 250 mm vibration shall be carried out at the same four positions, and also at intermediate points on a square grid pattern of approximately 150 mm. The vibration should be applied for the minimum time necessary for the full compaction of the concrete. The vibrator shou
32、ld be in a vertical position and not allowed to touch the sides or bottom of the mould. The concrete specimens shall be cured in the moulds for at least 72 h after casting at (21 2) C, either under polyethylene sheeting or at not less than 95 % relative humidity, then demoulded and cured until at le
33、ast 28 days after casting. During curing the test blocks shall be stored at (21 2) C, in air at a relative humidity of not less than 95 %. EN 1544:2006 (E) 6 5.4 Preparation of the anchoring grout 5.4.1 General The anchoring product is prepared in accordance with the manufacturers instructions. Befo
34、re mixing up the anchoring product, the constituents are stored under standard laboratory climate (21 2) C and (60 10) % RH for at least 24 h. 5.4.2 Preparation of the concrete for anchoring Seven days before carrying out the anchoring operation, each concrete test-piece shall be removed from the hu
35、midity chamber or room and then stored in a chamber or room maintained at (21 2) C and (60 10) % relative humidity. On the day of the intended anchoring operation, a hole shall be drilled by a rotary percussive or diamond drill, as specified by the manufacturer, in the centre of the 400 mm x 400 mm
36、face of the block. For larger blocks (for multiple tests) holes are drilled at a minimum distance of 200 mm from any edge and at least 400 mm from any other hole. Holes shall be drilled to a depth of (150 3) mm. The hole diameter shall be 20 mm, unless specified otherwise by the manufacturer. Immedi
37、ately after the drilling operation the hole(s) shall be cleaned in accordance with manufacturers instructions; the anchoring operation shall then be undertaken. 6 Procedure 6.1 Carrying out the anchoring operation Before use the rebars shall be prepared in accordance with manufacturers instructions;
38、 the prepared rebars, the anchoring product, and the equipment and tools required for mixing and placing shall be stored for at least 24 h in a room or chamber maintained at (21 2) C and (60 10) % relative humidity. The product shall be mixed and placed, and the rebars installed, strictly in accorda
39、nce with the manufacturers instructions. Each rebar, set to the base of its hole, shall be located and supported along the centre line of the hole by the centering device. NOTE The efficacy of the product is dependent on the care exercised during use, and therefore the manufacturers recommendations
40、should be followed. 6.2 Storage of test-pieces after carrying out the anchoring operation The test pieces shall be stored undisturbed for the minimum curing time recommended by the manufacturer, and then up to the time of the test, at (21 2) C and (60 10) % relative humidity. EN 1544:2006 (E) 7 6.3
41、Carrying out the test After storage each rebar is subjected to a continuous tensile load of (50 1,0) kN, for three months. The load should be applied and increased as evenly as possible, at a rate which permits the test load to be attained in approximately 30 s. During the duration of the test, test
42、 pieces are stored at (21 2) C and (60 10) % relative humidity or such other conditions as specified by the manufacturer. 6.4 Measurements The displacement of each rebar relative to the concrete test block is measured and recorded : before applying the tensile load ; immediately after applying the t
43、ensile load (start of the creep curve) ; after 1 day, 2 days and every 7 days until the test is completed at 3 months (reference value). These values are expressed in mm to two decimal places. They are then tabulated and plotted on a graph indicating the displacement of the rebars in terms of time (
44、logarithmic scale). 7 Test report The test report shall include the following information: a) identification of the product; b) date and place of the test; c) the temperature and relative humidity of the room or chamber during the test; d) the conditions for preparing the product; e) the batch numbe
45、r and pack size of product; f) the quantity of mixture prepared; g) the method used for mixing the constituents and the time taken; h) the time between mixing the constituents and installing the anchor; i) the diameter and the measured depth of the hole and the method of drilling; j) the time taken
46、to place the product and install the anchors, and any difficulties encountered; k) the temperature during the creep loading; l) the creep results in tabular and graphical form; m) any incident liable to have affected the results; n) any deviation from the conditions specified in this standard; o) re
47、ference to this standard. EN 1544:2006 (E) 8 Key 1 circlip 2 spherical bearing washer 3 load cell 4 spring 5 tensile threaded rod M16 6 creep measurement point 7 cross section of the anchoring product being tested 8 concrete block 9 hexagon nut (B) 10 bearing washer 11 load application cylinder 12 c
48、alibrated sleeve 13 hexagon nut (A) 14 3 adjustable bases (stainless steel) Figure 1 Apparatus for applying constant tensile load blankBS EN BSI389 Chiswick High RoadLondonW4 4AL1544:2006BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards
49、. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions.It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard w
