1、BRITISH STANDARD Products and systems for the protection and repair of concrete structures Test methods Determination of stiffening time The European Standard EN 13294:2002 has the status ofa British Standard ICs 91.080.40 BS EN 13294:2002 WkNb A%“ U- rn% E rn NO COPYING WITHOUT BSI PERMISSION EXCEP
2、T AS PERMITTED BY COPYRIGHT LAW $ present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizat
3、ions represented on this subcommittee can be obtained on request to its secretary. Cross-references The 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 Correspo
4、ndence Index?, or by using the ?Search?faci1ity ofthe BSI Electronic Catalogue or ofBritish Stan dards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compliance with a British Standard does not ofi
5、tself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since public
6、ation Amd.No. I Date I Comments OBSI 12 July 2002 ISBN O 580 40088 3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13294 May 2002 ICs 91.080.40 English version Products and systems for the protection and repair of concrete structures - Test methods - Determination of stiffening time Produits
7、et systmes de protection et de rparation des structures en bton - Mthodes dessai - Temps de raidissement Produkte und Systeme fr den Schutz und die Instandsetzung von Betontragwerken - Prfverfahren - Bestimmung der Verarbeitbarkeitszeit This European Standard was approved by CEN on 4 January 2002 CE
8、N members are bound to comply with the CENLENELEC 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 appl
9、ication to the 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 Management Centre has the
10、same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMI
11、TTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-I 050 Brussels O 2002 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13294:2002 E EN 13294:2002 (E) Co
12、ntents Page Foreword 3 1 2 3 4 5 5.1 5.2 5.3 5.4 5.5 5.6 6 7 . 4 Scope . Normative references . Apparatus . 5 Preparation of mortar or concret . 5 . 5 . 5 . 6 . 6 etration . . 6 . 6 . 6 Procedure General. . Resistance to penetration Expression of the test results . 2 EN 13294:2002 (E) Foreword This
13、document EN 13294:2002 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
14、 November 2002, and conflicting national standards shall be withdrawn at the latest by December 2002. It has been prepared by sub-committee 8 “Products and systems for the protection and repair of concrete structures“, the secretariat of which is held by AFNOR. This European Standard is one of a ser
15、ies dealing with products and systems for the protection and repair of concrete structures. It describes a method of test determining the stiffening time of grout, mortar or concrete repair products and systems, making allowance for the presence of coarse aggregate. According to the CENKENELEC Inter
16、nal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switz
17、erland and the United Kingdom. 3 EN 13294:2002 (E) 1 Scope This European Standard specifies a method for determining the stiffening time of repair products and systems specified in prEN 1504-3l comprising hydraulic based mortar and concrete (CC), including those modified by the addition of polymers
18、(PCC). 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to o
19、r revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 196-1, Mefhods of fesfing cemenf - Par 1: Deferminafion of sfren
20、gfh. EN 480-2, Admixfures for concrefe, mortar and grouf - Tesf mefhods - Par 2: Deferminafion of seffing fime. EN 933-1, Tesfs for geomefric properies of aggregafes - Par 1: Deferminafion of particle size disfribufion - Sieving mefhod. EN 1 O1 5-7, Mefhods of fesf for mortar for masonry - Par 7: De
21、ferminafion of air confenf of fresh mortar. EN 1766, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Tesf mefhods - Reference concrefes for fesfing. prEN 1504-3, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Par 3: Sfrucfural and non-sfrucfur
22、al repair. 3 Principle The method shall be based on EN 480-2. A sample of freshly-mixed repair product is placed into a container set on a weigh balance. Periodically, a penetration rod is pressed into the mortar to a defined depth and the penetration resistance calculated from the mass reading on t
23、he scale. As the mortar stiffens due to hydration of the cementitious components, the resistance to penetration will increase and by recording the penetration resistance with time, the stiffening time can be determined. The stiffening time is the period from completion of mixing of the grout, mortar
24、 or concrete until a resistance to penetration of 0,5 N/mm2 (initial) and 33 N/mm2 (final) is achieved. For mixes of a repair product with a particle size in excess of 5 mm, the wet mix is first sieved to separate and collect the mortar component, on which the test is performed. Under preparation. 4
25、 EN 13294:2002 (E) 4 Apparatus The following apparatus is required. 4.1 Full tolerance 5 mm perforated plate test sieve complying with the requirements of EN 933-1. 4.2 greater than 100 g. Self-indicating platform scale preferably with a tare device, reading to at least 15 kg with graduations not 4.
26、3 Containers rigid, watertight, non-absorptive, non-oiled and at least 75 mm in diameter and 50 mm to 100 mm deep. Sufficient containers are needed to provide an area of surface large enough for the required number of penetrations of the rod. NOTE It can be found advantageous to use disposable conta
27、iners. 4.4 Stop-clock with divisions in seconds. 4.5 Brass rod 65 mm long and (6,175 f 0,025) mm in diameter, with one end ground flat perpendicular to the axis of the rod. At (25 f 0,251) mm from this end the diameter shall be turned down to (43 f 0,5) mm for the remaining 40 mm. 4.6 narrow end of
28、the brass rod to rest on the shoulder formed by the change in diameter of the rod. Brass washer approximately 5 mm internal diameter and 20 mm in external diameter, slipped over the 4.7 Clamp and stand such that the brass rod is held vertically by the narrow end with the washer well clear of the cla
29、mp. The clamp shall be mounted in a stand, such as a lever-type drill-stand, that enables the rod to be lowered vertically in a controlled and steady manner over a distance of at least 40 mm (Figure 1). The stand shall be firmly fixed to a bench so that the lower end of the brass rod, in its raised
30、position, is about 6 mm above the rim of the container when this is placed on the platorm scale. 4.8 Standard laboratory climate of (21 f 2) “C and (60 f IO) % RH. 4.9 Mortar mixer in accordance with EN 196-1 4.10 Mortar and concrete mixer forced action pan mixer 5 Procedure 5.1 General The determin
31、ation of stiffening time is carried out in the standard laboratory climate (4.8). All materials and test equipment shall be conditioned in the standard laboratory climate for 24 h prior to proceeding with the test. NOTE applications. In addition, the stiffening time for the repair product or system
32、can be determined at other temperatures for special 5.2 Preparation of mortar or concrete For concrete mixes which contain coarse aggregates, preparation shall be in accordance with EN 1766, using a concrete mixer (4.10), or as otherwise instructed by the manufacturer. For mortar mixes, unless state
33、d otherwise by the manufacturer, use the mortar mixer (4.9), set to a low speed. For both PCC and cementitious (CC) mortar, add the water or gauging liquid to the bowl and then add all the dry ingredients, mixing for a total period of two minutes. Where manufacturers instructions preclude use of par
34、t bags of material, a mortar mixer (4.10) or other method recommended by the manufacturer shall be used. NOTE EN 196-1. An alternative is to use a concrete mixer (4.10). It has been found that certain types of repair mortar can foam excessively under the action of the mixer specified in 5 EN 13294:2
35、002 (E) Where required, the air content of the freshly mixed concrete or mortar shall be determined according to EN 1015-7, pressure method. 5.3 Separation of mortar and filling of containers For concrete mixes which contain aggregate in excess of 5 mm, separate the mortar matrix from the aggregate
36、by sieving the concrete through the 5 mm test sieve (4.1) and onto a non-absorptive surface. Remix the mortar thus obtained using a hand trowel before proceeding. Fill the containers (4.3) to within 10 mm of the top in ten increments, tapping the container on the bench four times after each addition
37、. Complete the filling within 15 min of the completion of mixing. NOTE For certain stiff products or systems, which have zero flow slump when measured in accordance with EN 13395-1 this compaction method will be unsuitable and tamped compaction or other method advised by the manufacturer will be req
38、uired. 5.4 Storage conditions Cover the filled containers to prevent the evaporation of water. Record whether any bleed or segregation occurs during the test period but do not remove the bleed water that may collect. 5.5 Times of determination of resistance to penetration Determine the resistance to
39、 penetration at hourly intervals up to a resistance of 1 N/mm2 and thereafter at half-hourly intervals until a resistance of 4 N/mm2 is reached. 5.6 Resistance to penetration At the appropriate times place the container on the platorm scale and remove the cover. Position the container so that the mo
40、rtar surface beneath the brass rod is at least 20 mm from the rim of the container or from the position of any previous penetration. Adjust the scale-tare device or record the mass of the filled container. Slowly lower the brass rod into the mortar until the brass washer just touches the surface; at
41、 this moment note the scale reading, in kilograms, and correct if necessary, for the mass of the filled container. 6 Expression of the test results Calculate the resistance to penetration in newtons per square millimetre, at various test times, by dividing the recorded reading in kilograms by three.
42、 NOTE the reading in kilograms is equivalent to a force of 10 N, which is sufficiently accurate for the purpose of this test. This simple calculation is made possible by using a brass rod with an end area of 30 mm2, and by assuming that Estimate the times to each resistance to penetration of 0,5 N/m
43、m2 (initial) and 33 N/mm2 (final) by linear interpolation between the results immediately above and below these values. Report the results to the nearest 15 min. 7 Test report The test report shall contain the following information : a) a reference to the test method standard ; b) name and address o
44、f the test laboratory ; c) identification number and date of the test ; 6 EN 13294:2002 (E) name and address of the manufacturer or supplier of the product ; name and identification marks or batch number of the product, date of supply of the product ; date of preparation of the test specimens and an
45、y deviation from the prescribed method of preparation, including date of manufacture of the test samples and the maximum aggregate size ; conditions of storage of prepared specimens prior to test ; date of test and details of the test equipment used, including the make, type and capacity and the cal
46、ibration details or the identification number of the apparatus ; the test results, including the period of delay between completion of mixing and testing, evidence of segregation and bleeding and the time to achieve the initial and final penetration resistance ; precision data ; date of test report
47、and signature. 7 EN 13294:2002 (E) Dimensions in millimetres t I I I I I I I I I 2 +I 0 6,175 2 0,025 3 I 4 1 Drill stand (lever type) 2 Washer 3 Penetration rod 4 Mould (or container) 5 6 50 to 100 Scale (preferably with a tare device) reading to at least 15 kg by graduations not greater than 100 g
48、 Figure 1 - Apparatus for the determination of stiffening time 8 EN 13294:2002 (E) Bibliography EN 1015-9, Mefhods of fesf for mortar for masonry - Par 9: Deferminafion of workable life and correcfion fime of fresh morfar. EN 1504-1, Producfs and sysfems for fhe profecfion and repair of concrefe sfr
49、ucfures - Definifions, requiremenfs, qualify confrol and evaluafion of conformify - Par 1: Definifions. prEN 13395-1, Producfs and sysfems for fhe profecfion and repair of concrefe sfrucfures - Tesf mefhods - Deferminafion of Workabilify - Par 1: Tesf for flow of fhixofropic mortars. 9 BS EN 13294:2002 B SI 389 Chiswick High Road London w4 4AL BSI -British Standards Institution BSI 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 incor
