1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58concreteThe European Standard EN 14488-1:2005 has the status of a British StandardICS 91.100.30Test
2、ing sprayed concrete Part 1: Sampling fresh and hardened BRITISH STANDARDBS EN 14488-1:2005BS EN 14488-1:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 5 December 2005 BSI 5 December 2005ISBN 0 580 46499 7request to its secretary.Cross-r
3、eferencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of Brit
4、ish Standards Online.This 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 does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front
5、 cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this subcommittee can be obt
6、ained on present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard is the offic
7、ial English language version of EN 14488-1:2005.The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/10, Sprayed concrete, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE N
8、ORMEN 14488-1June 2005ICS 91.100.30English versionTesting sprayed concrete - Sampling fresh and hardenedconcreteEssais pour bton projet - chantillonnage de bton fraiset de bton durciPrfung von Spritzbeton - Probenahme von Frisch- undFestbetonThis European Standard was approved by CEN on 17 April 200
9、5.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 obtained on a
10、pplication 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 Secretariat has
11、 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, Portugal, Slovak
12、ia,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 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for C
13、EN national Members.Ref. No. EN 14488-1:2005: EEN 14488-1:2005 (E) 2 Contents page 1 Scope .4 2 Normative references .4 3 Principle.4 4 Apparatus 4 5 Procedures 4 6 Identification of sample 6 Bibliography.7 EN 14488-1:2005 (E) 3 Foreword This document (EN 14488-1:2005) has been prepared by Technical
14、 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 December 2005, and conflicting national standards sh
15、all be withdrawn at the latest by December 2007. This European Standard is part of a series concerned with testing sprayed 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
16、concrete Part 3: Flexural strengths (first peak, ultimate and residual) of fibre reinforced beam specimens Part 4: Bond strength 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: Fibr
17、e content of fibre reinforced concrete This part does not supersede any other European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
18、 Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14488-1:2005 (E) 4 1 Scope This European Standard specifies a meth
19、od for obtaining samples of fresh or hardened (i.e. before or after set) sprayed concrete, depending on the property to be measured and its associated test method. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
20、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12350-1, Testing fresh concrete Part 1: Sampling EN 12504-1, Testing concrete in structures - Part 1: Cored specimens - Testing, examining and testing in compr
21、ession 3 Principle A sample of fresh or hardened sprayed concrete is extracted from either an in situ element or a test panel. 4 Apparatus 4.1 Scoop, or similar sampling device, made from a non-absorbent material not readily attacked by cement paste, suitable for taking increments of concrete. 4.2 T
22、rowel, or similar cutting device, made from a non-absorbent material not readily attacked by cement paste, suitable for cutting a concrete sample from fresh, in situ sprayed concrete. 4.3 Moulds, of steel or other non-water-absorbing rigid material shall be used (a minimum of 4 mm steel sheet or 18
23、mm plywood). The minimum plan dimensions shall be 500 mm 500 mm for hand spraying and 1 000 mm 1 000 mm for robot spraying. The actual dimensions should be chosen taking into account the type, number and size of samples to be extracted (and avoiding the defective zone). The thickness should be appro
24、priate to the size of test specimens to be cut from the panel, but shall not be less than 100 mm. Appropriate measures shall be taken to avoid entrapment of rebound in the mould (such as chamfered or slotted sides). 4.4 Coring or cutting equipment, suitable for extracting samples of sprayed concrete
25、 from a test panel or, where required in situ, to the required dimensions. 5 Procedures 5.1 General Fresh samples may be extracted from the basic mix, the in situ material or from a test panel. Hardened samples may be cut from the in situ material or from a test panel. It should be noted that the pr
26、operties at each of these locations may be different, due to the spraying process. The most appropriate sample type and location should be used, which will depend on the purpose of the quality control and on the specimens required for the property or properties to be measured. A sample of fresh or h
27、ardened concrete is extracted in a manner suitable for the required test method. EN 14488-1:2005 (E) 5 5.2 Obtaining a fresh sample from the basic mix The basic concrete mix shall be sampled from the mixing pan or spraying pump or gun in a series of increments with a scoop, which are to be combined
28、to form a homogenous sample, in accordance with EN 12350-1. 5.3 Obtaining a fresh sample from in situ sprayed concrete The concrete or mortar shall be cut by trowel from the in situ sprayed material before initial set. 5.4 Making a test panel The moulds shall be positioned within 20 of the vertical
29、(unless another orientation has been specified, e.g. overhead) and sprayed with the same equipment, technique, layer thickness per pass and spraying distance as the actual work. The operator shall also be the same. The panel shall be protected immediately against moisture loss using the same method
30、as in the construction. The samples shall be marked for later identification (Mix, location, date and operator, see clause 6). The panel shall not be moved within 18 h of being sprayed, unless a shorter period is agreed between the parties. Curing shall continue thereafter under site conditions for
31、at least 7 days or until samples are to be extracted. 5.5 Obtaining a fresh sample from a test panel The concrete or mortar shall be cut from the test panel of sprayed material before initial set, and shall not include material within the defective zone, see Figure 1. 5.6 Obtaining a hardened sample
32、 from in-situ sprayed concrete The test samples shall be obtained from the set in-situ sprayed material in accordance with EN 12504-1. 5.7 Obtaining a hardened sample from a test panel The test samples shall be cored or sawn from the panel, and shall not include material within the defective zone, s
33、ee Figure 1 (with the exception of the ends of beams for flexural and residual strength testing to prEN 14488-3, which may include such material, provided it does not intrude into the central 250 mm of the beam). EN 14488-1:2005 (E) 6 The width of the defective zone, d, is equal to the depth of the
34、test panel. Figure 1 Defective zone of a test panel 6 Identification of sample 6.1 Fresh samples Test specimens made from the fresh sample extracted from a test panel or in situ shall be marked with a waterproof ink or paint to indicate the mix, location, specimen orientation, date and operator. 6.2
35、 Hardened samples The test panel or sample extracted from the test panel or in-situ shall be marked with a waterproof ink or paint to indicate the mix, location, specimen orientation, date and operator. EN 14488-1:2005 (E) 7 Bibliography 1 prEN 14488-3, Testing sprayed concrete - Part 3: Flexural st
36、rengths (first peak, ultimate and residual) of fibre reinforced beam specimens BS EN BSI389 Chiswick High RoadLondonW4 4AL14488-1:2005BSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and
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