【BS標準word原稿】BS EN 12390-8-2009 Testing hardened concrete Part 8 Depth of penetration of water under pressure.doc

豆丁網(wǎng)：/kmust1british standardbs en12390-8:2009testing hardenedconcretepart 8: depth of penetration of water under pressureics 91.100.30,no copying without bsi permission except as permitted by copyright lawbs en 12390-8:2009national forewordthis british standard is the uk implementation of en 12390-8:2009. it supersedes bs en 12390-8:2000 which is withdrawn.the uk participation in its preparation was entrusted to technicalcommittee b/517/1, concrete production and testing.a list of organizations represented on this committee can be obtained on request to its secretary.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 cannot confer immunity from legal obligations.this british standard was published under the authority of the standards policy and strategy committee on 31 may 2009 bsi 2009isbn 978 0 580 58800 6amendments/corrigenda issued since publicationdate commentsbs en 12390-8:2009european standard norme europenneeuropische normen 12390-8february 2009ics 91.100.30supersedes en 12390-8:2000english versiontesting hardened concrete - part 8: depth of penetration of water under pressureessai pour bton durci - partie 8: profondeur de pntration deau sous pressionprfung von festbeton - teil 8: wassereindringtiefe unterdruckthis european standard was approved by cen on 27 december 2008.cen members are bound to comply with the cen/cenelec internal regulations which stipulate the conditions for giving this european standard the status of a national standard without any alteration. up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the cen management centre or to any cen member.this european standard exists in three official versions (english, french, german). a version in any other language made by translation under the responsibility of a cen member into its own language and notified to the cen management centre has the same status as the official versions.cen members are the national standards bodies of austria, belgium, bulgaria, 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.european committee for standardization c om i t eur op en de nor m al i s ati on eur op i s c hes kom i tee f r nor m ung management centre: avenue marnix 17, b-1000 brussels 2009 cenall rights of exploitation in any form and by any means reserved worldwide for cen national members.ref. no. en 12390-8:2009: econtentspageforeword.31scope .42normative references .43principle .44apparatus .45specimen .66procedure .67test result .68test report .69precision .77bs en 12390-8:2009en 12390-8:2009 (e)forewordthis document (en 12390-8:2009) 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 august 2009, and conflicting national standards shall be withdrawn at the latest by august 2009.attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. cen and/or cenelec shall not be held responsible for identifying any or all such patent rights.this document supersedes en 12390-8:2000.the standard has been restricted to tests on specimens cured in water. this standard is one of a series concerned with testing concrete.the series en 12390 includes the following parts: en 12390 testing hardened concrete part 1:shape, dimensions and other requirements for specimens and moulds; part 2:making and curing specimens for strength tests;part 3:compressive strength of test specimens;part 4:compressive strength - specification for testing machines; part 5:flexural strength of test specimens;part 6:tensile splitting strength of test specimens; part 7:density of hardened concrete;part 8:depth of penetration of water under pressure.the following amendments have been made to the 2000-10 edition of this standard: editorial revisionaccording to the cen/cenelec internal regulations, the national standards organizations of the following countries are bound to implement this european standard: austria, belgium, bulgaria, 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 the united kingdom.1scopethis european standard specifies a method for determining the depth of penetration of water under pressure in hardened concrete which has been water cured.2normative referencesthe 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 document (including any amendments) applies.en 12390-2, testing hardened concrete part 2: making and curing specimens for strength tests3principlewater is applied under pressure to the surface of hardened concrete. the specimen is then split and the depth of penetration of the waterfront is measured.4apparatus4.1testing equipmentthe test specimen, of given dimensions, shall be placed in any suitable equipment in such a manner that the water pressure can act on the test area and the pressure applied can be continuously indicated. an example of a test arrangement is shown in figure 1.note 1it is preferable that the apparatus should allow the other surfaces of the test specimen to be observed. note 2the water pressure may be applied to the surface of the test specimen either from the bottom, or the top. a watertight seal shall be provided, made of rubber or other similar material.the dimensions of a test area shall be approximately half of the length of the edge or diameter of the testsurface.key1packing piece2sealing ring3screwed on plate4screw-threaded rod5water under pressure6screwed on platedimensions in milimetresfigure 1 example of test arrangement5specimenthe specimen shall be cubic, cylindrical or prismatic with the minimum dimension of the surface of the specimen to be tested not less than 150 mm and no other dimension less than 100 mm.6procedure6.1preparation of the test specimenimmediately after the specimen is de-moulded, roughen the surface to be exposed to water pressure, with a wire brush and cure the specimen under water in accordance with the procedures given in en 12390-2.6.2application of water pressurethe test shall be started when the specimen is at least 28 days old. do not apply the water pressure to a trowelled surface of a specimen. place the specimen in the apparatus and apply a water pressure of (500 50) kpa for (72 2) h. during the test, periodically observe the appearance of the surfaces of the test specimen not exposed to the water pressure to note the presence of water. if leakage is observed then consider the validity of the result and record the fact.notethe use of tap water is satisfactory.6.3examination of specimenafter the pressure has been applied for the specified time, remove the specimen from the apparatus. wipe the face on which the water pressure was applied to remove excess water. split the specimen in half, perpendicularly to the face on which the water pressure was applied. when splitting the specimen, and during the examination, place the face of the specimen exposed to the water pressure on the bottom. as soon as the split face has dried to such an extent that the water penetration front can be clearly seen, mark the water front on the specimen. measure the maximum depth of penetration under the test area and record it to the nearest mm.7test resultthe maximum depth of penetration, expressed in mm, is the test result.8test reportthe report shall include:a)identification of the test specimen;b)date of start of the test;c)description of the specimen (shape and dimensions);d)direction of application of water pressure with respect to the casting direction;e)maximum depth of penetration, in mm;f)any leakage and consideration of the validity of the result; (if appropriate)g)any deviation from the standard test method;h)a declaration by the person technically responsible for the test that it was carried out in accordance with this document, except as noted in item g).9precisionthere is no precision data available.bs en12390-8:2009bsi groupheadquarters 389chiswick high road, london, w4 4al, uk tel +44 (0)20 8996 9001fax +44 (0)20 8996 7001 / standardsbsi - 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 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 would inform the secretary of the technical committee responsible, the identity of which can be found on the inside front cover. tel:+44 (0)20 8996 9000. fax: +44 (0)20 8996 7400.bsi offers members an individual updating service called plus which ensures that subscribers automatically receive the latest editions of standards.buying standardsorders for all bsi, international and foreign standards publications should be addressed to customer services. tel: +44 (0)20 8996 9001. fax: +44 (0)20 89967001 email: you may also buy directly using a debit/credit card from the bsi shop on the website /shopin response to orders for international standards, it is bsi policy to supply the bsi implementation of those that have been published as british standards, unless otherwise requested.information on standardsbsi provides a wide range of information on national, european and international standards through its library and its technical help to exporters service. various bsi electronic information services are also available which give details on all its products and services. contact information centre. tel:+44 (0)20 8996 7111 fax: +44 (0)20 8996 7048 email: subscribing members of bsi are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. for details of these and other benefits contact memb