1、BRITISH STANDARDBS EN 14488-6:2006Testing sprayed concrete Part 6: Thickness of concrete on a substrateThe European Standard EN 14488-6:2006 has the status of a British StandardICS 91.100.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g
2、51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14488-6:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 49307 5National forewordThis British Standard was
3、 published by BSI. It is the UK implementation of EN 14488-6:2006.The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/10, Sprayed concrete.A list of organizations represented on B/517/10 can be obtained on request to its secretary.This
4、publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROP
5、ENNEEUROPISCHE NORMEN 14488-6June 2006ICS 91.100.30English VersionTesting sprayed concrete - Part 6: Thickness of concrete on asubstrateEssais pour bton projet - Partie 6 : Epaisseur du btonsur un supportPrfung von Spritzbeton - Teil 6: Schichtdicke von Betonauf einem UntergrundThis European Standar
6、d was approved by CEN on 3 May 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 nati
7、onalstandards may be obtained 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 notif
8、ied to the Central Secretariat 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
9、, Norway, Poland, Portugal, 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 fo
10、rm and by any means reservedworldwide for CEN national Members.Ref. No. EN 14488-6:2006: EEN 14488-6:2006 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Equipment 4 5 Test procedures.5 5.1 Marking of positions5 5.2 Drilling of holes or cores 5 5.3 Measurement5 5.3.1
11、Fresh concrete .5 5.3.2 Hardened concrete 5 6 Results 5 7 Report .6 Bibliography7 EN 14488-6:2006 (E) 3 Foreword This document (EN 14488-6:2006) 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
12、be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by December 2007. This Draft European Standard part of a series concerned with testing sprayed
13、 concrete. This series EN 14488 Testing sprayed concrete includes the following parts: Part 1: Sampling fresh and hardened concrete Part 2: Compressive strength of young sprayed concrete Part 3: Flexural strengths (first peak, ultimate and residual) of fibre reinforced beam specimens Part 4: Bond st
14、rength of cores by direct tension Part 5: Determination of energy absorption capacity of fibre reinforced slab specimens Part 6: Thickness of concrete on a substrate Part 7: Fibre content of fibre reinforced concrete According to the CEN/CENELEC Internal Regulations, the national standards organizat
15、ions of the following countries are bound to implement this European 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, Slovaki
16、a, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14488-6:2006 (E) 4 1 Scope This standard describes methods for the determination of the thickness of sprayed concrete on a substrate after spraying. The results can also give an indication of the parallelism of the concrete to the substr
17、ate. The substrate may be rock, soil, concrete or other surface. 2 Normative references The following referenced 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 docume
18、nt (including any amendments) applies Not applicable. 3 Principle In fresh concrete, a depth gauge is pushed into sprayed concrete and the thickness is measured. In hardened concrete, holes or cores are drilled to the substrate. The depth of the holes or extracted cores is then measured. 4 Equipment
19、 4.1 Template sheet, if used, as shown in Figure 1. The template sheet may be made of suitable material. Drill five holes to be spaced (600 50) mm in two lines of three at right angles as shown in figure 1. The template shall be flat when in use. Dimensions in mm Figure 1 Template sheet dimensions 4
20、.2 Hammer drill of sufficient length to penetrate fully through the expected thickness of sprayed concrete. 4.3 Core drill of sufficient length and diameter. 4.4 Lamp, or torch. 4.5 Depth gauge, such as a Talmeter or similar. 4.6 Metal, plastic or wood rule. EN 14488-6:2006 (E) 5 5 Test procedures 5
21、.1 General The standard does not describe nor define the area to be tested, the extent of testing or the requirements in respect of the results. A template may be used to facilitate the marking of positions where the thickness is to be controlled. The choice of a cored hole may facilitate the simult
22、aneous extraction of a cored sample for the determination of other sprayed concrete properties, including compressive strength (in accordance with EN 12504-1) and bond strength (in accordance with EN 14488-4). 5.2 Marking of positions Mark and number five positions, spaced (600 50) mm in two lines o
23、f three at right angels (see template in figure 1) unless an alternative agreement has been taken between the parties. If a template is used, place it within the area of which the thickness is to be checked, and mark and number the positions of the holes on the concrete. 5.3 Drilling of holes or cor
24、es Using the hammer or core drill, drill holes or cores with size to be agreed between parties, the method being chosen so that the interface can be reliably identified. Drill holes at the marked positions, approximately perpendicular to the surface of the concrete, to such a depth that the entire c
25、ross sectional area of the bottom of the hole consists of substrate. If the drill encounters a reinforcing bar, drill a new hole within 50 mm of the original hole. Clean the hole with water or compressed air so that you can reliably see the surface at the bottom of the hole. 5.4 Measurement 5.4.1 Fr
26、esh concrete In fresh concrete, the depth gauge is pushed perpendicular through the sprayed concrete to the substrate and the thickness measured to nearest mm relative to a rule placed across the surfaces avoiding any highspots. Repeat the procedure for the other measurements. 5.4.2 Hardened concret
27、e Place the rule across a hole, passing through its centre and avoiding any high spots in the concrete surface. Measure the depth of the hole with the depth gauge, to the nearest mm, from the edge of the rule to the substrate surface. Repeat the procedure for the other holes. Alternatively, the dept
28、h may be determined by measurement of the extracted core, when available. If the substrate surface is not perpendicular to the line of the hole, measure the depth of the hole as the mean value of the greatest and the least depths between the edge of the rule and the surface of the substrate. Use the
29、 lamp to identify the surface of the substrate. 6 Results Calculate the mean depth of the 5 holes, in millimetres. EN 14488-6:2006 (E) 6 7 Report The test report shall include: a) reference to this standard; b) method used (holes or cores); c) identifications, size and position of the area checked;
30、d) placing of the template, if used, within the area; e) depth of individual holes (nearest millimetre); f) thickness of the sprayed concrete, giving the minimum, maximum and the mean depths (nearest millimetre); g) date of the test; The report may include: h) The three values in line in each direct
31、ion, which can be used to give an indication of the parallelism of the sprayed concrete to the substrate surface. EN 14488-6:2006 (E) 7 Bibliography 1 EN 12504-1, Testing concrete in structures Part 1: Cored Specimens Taking, examining and testing in compression. 2 EN 14488-4, Testing sprayed concre
32、te - Part 4: Bond strength of cores by direct tension. BS EN 14488-6:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international lev
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