1、July 2014Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.
2、100.15!%2d“2159765www.din.deDDIN EN 1367-7Tests for thermal and weathering properties of aggregates Part 7: Determination of resistance to freezing and thawing ofLightweight aggregates;English version EN 1367-7:2014,English translation of DIN EN 1367-7:2014-07Prfverfahren fr thermische Eigenschaften
3、 und Verwitterungsbestndigkeit vonGesteinskrnungen Teil 7: Bestimmung des Widerstandes von leichten Gesteinskrnungen gegenFrost-Tau-Wechsel;Englische Fassung EN 1367-7:2014,Englische bersetzung von DIN EN 1367-7:2014-07Essais pour dterminer les proprits thermiques et laltrabilit des granulats Partie
4、 7: Dtermination de la rsistance au gel-dgel des granulats lgers;Version anglaise EN 1367-7:2014,Traduction anglaise de DIN EN 1367-7:2014-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 10 pages06.14 DIN EN 1367-7:2014-072 A comma is
5、 used as the decimal marker. National foreword This document (EN 1367-7:2014) has been prepared by Technical Committee CEN/TC 154 “Aggregates” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standar
6、ds Committee), Working Committee NA 062-03-13 AA Gemeinschaftsarbeits-ausschuss NA 062/FGSV: Gesteinskrnungen; Prfverfahren, Petrographie, Probenahme und Przision. EN 1367-7April 2014 ICS 91.100.15 English Version Tests for thermal and weathering properties of aggregates -Part 7: Determination of re
7、sistance to freezing and thawingof Lightweight aggregates Essais pour dterminer les proprits thermiques et laltrabilit des granulats - Partie 7: Dtermination de la rsistance au gel-dgel des granulats lgers Prfverfahren fr thermische Eigenschaften und Verwitterungsbestndigkeit von Gesteinskrnungen -
8、Teil 7: Bestimmung des Widerstandes von leichten Gesteinskrnungen gegen Frost-Tau-Wechsel This European Standard was approved by CEN on 16 February 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
9、tus 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G
10、erman). 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
11、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUn
12、ited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1367-7:2014 EEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEUROPEAN COMMITTEE FOR STANDARDIZATIONC
13、OMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 1367-7:2014 (E) 2 Contents PageForeword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Apparatus and materials .5 6 Sampling .5 7 Test specimens 5 7.1 General 5 7.2 Size of test specimens 5 7.3 Preparation
14、 of test specimens .6 8 Procedure .6 8.1 Soaking .6 8.2 Freezing in air and thawing in water 6 9 Calculation and expression of results .6 10 Test report 7 10.1 Mandatory data 7 10.2 Optional data 7 Bibliography 8 DIN EN 1367-7:2014-07EN 1367-7:2014 (E) 3 Foreword This document (EN 1367-7:2014) has b
15、een prepared by Technical Committee CEN/TC 154 “Aggregates”, the secretariat of which is held by BSI. 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 October 2014, and conflicting national standar
16、ds shall be withdrawn at the latest by October 2014. 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. EN 1367 “Tests for thermal and we
17、athering properties of aggregates“ consists of the following parts: Part 1: Determination of resistance to freezing and thawing Part 2: Magnesium sulfate test Part 3: Boiling test for “Sonnenbrand Basalt” Part 4: Determination of drying shrinkage Part 5: Determination of resistance to thermal shock
18、Part 6: Determination of resistance to freezing and thawing in the presence of salt (NaCl) Part 7: Determination of resistance to freezing and thawing of Lightweight Aggregates (the present document) Part 8: Determination of resistance to disintegration of Lightweight Aggregates Test methods for oth
19、er properties of aggregates are covered by parts of the following European Standards: EN 932, Tests for general properties of aggregates EN 933, Tests for geometrical properties of aggregates EN 1097, Tests for mechanical and physical properties of aggregates EN 1744, Tests for chemical properties o
20、f aggregates EN 13179, Tests for filler aggregate used in bituminous mixtures NOTE This document supersedes the test methods described in EN 130551:2002, Annex C and EN 13055-2:2004, Annex B. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following cou
21、ntries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, P
22、oland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1367-7:2014-07EN 1367-7:2014 (E) 4 1 Scope This European Standard specifies the reference test method used for type testing, and in case of dispute, for determining the resistance to freez
23、ing and thawing of lightweight aggregates (LWA) in accordance with EN 13055. For other purposes, in particular for factory production control, other methods may be used provided that an appropriate working relationship with the reference method has been established. The test is applicable to LWA wit
24、h particle size not less than 4 mm and up to a maximum size of 32 mm. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated referenc
25、es, the latest edition of the referenced document (including any amendments) applies. EN 932-1, Tests for general properties of aggregates - Part 1: Methods for sampling EN 932-2, Tests for general properties of aggregates - Part 2: Methods for reducing laboratory samples EN 932-5, Tests for general
26、 properties of aggregates - Part 5: Common equipment and calibration EN 933-2, Tests for geometrical properties of aggregates - Part 2: Determination of particle size distribution - Test sieves, nominal size of apertures EN 13055-1, Lightweight aggregates - Part 1: Lightweight aggregates for concret
27、e, mortar and grout EN 13055-2, Lightweight aggregates - Part 2: Lightweight aggregates for bituminous mixtures and surface treatments and for unbound and bound applications 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 13055-1, EN 13055-2 and the fo
28、llowing apply. 3.1 test specimen sample used as in single determination when a test method requires more than one determination of a property 3.2 constant mass mass determined by successive weighings performed 1 h apart and not differing by more than 0,1 % Note 1 to entry: In many cases constant mas
29、s can be achieved after a test portion has been dried for a pre-determined period in a specified oven at (110 5) C. Test laboratories can determine the time required to achieve constant mass for specific types and sizes of sample dependent upon the drying capacity of the oven used. 4 Principle Three
30、 test specimens of lightweight aggregates, having been soaked in water at atmospheric pressure, are subjected to 20 freezethaw cycles. This involves cooling down to 17,5 C in air and then thawing in a water bath at about 20 C. After completion of the freezethaw cycles, the loss of mass of the lightw
31、eight aggregates is recorded. DIN EN 1367-7:2014-07EN 1367-7:2014 (E) 5 5 Apparatus and materials 5.1 All apparatus, unless otherwise stated, shall conform to the general requirements of EN 932-5. 5.2 Ventilated drying oven, with forced circulation of adequate capacity. The oven shall be capable of
32、being maintained at (110 5) C. 5.3 Balance, capable of weighing test specimens up to 400 g with an accuracy of 0,04 g and test specimens above 400 g with an accuracy of 0,1 g. 5.4 Low temperature cabinet, (upright or chest) with air circulation. The cabinet shall be capable of being maintained at (1
33、7,5 2,5) C. 5.5 Test sieves, conforming to EN 933-2 shall be used. 5.6 Water, distilled or deionised. 5.7 Container, made from corrosion resistant material with a base area of approximate 0,02 m2and a height not less than 0,1 m. 5.8 Grid, of a suitable size and aperture to prevent the lightweight ag
34、gregates floating out of the container and to prevent any loss of whole aggregates. 5.9 Water bath, thermostatically controlled to maintain a temperature of (20 3) C. 6 Sampling Sampling and sample reduction shall be carried out in accordance with EN 932-1 and EN 932-2. 7 Test specimens 7.1 General
35、Three individual test specimens shall be used. The test specimens shall be obtained in accordance with EN 932-2 by sample reduction. Particles of oversize (D) and undersize (d) shall be removed. 7.2 Size of test specimens The quantities for each of the three individual test specimens shall be chosen
36、 according to the upper size of the aggregates as shown in Table 1. Deviations of 5 % in the volume of test specimens are permissible. Table 1 Test specimen volumes required Maximum aggregate size (mm) Approximate volume of the test specimen (l) 8 16 32 0,5 1,0 1,5 DIN EN 1367-7:2014-07EN 1367-7:201
37、4 (E) 6 7.3 Preparation of test specimens Wash the test specimens on the lower (d) test sieve. Dry the test specimens to constant mass. Allow to cool to ambient temperature and weigh immediately (M1, see Clause 9). Weighing shall be carried out to the following accuracies: Test specimens up to 400 g
38、: to 0,04 g. Test specimens above 400 g: to 0,1 g. 8 Procedure 8.1 Soaking Store the test specimens at atmospheric pressure for (240 15) min in the containers specified in 5.7 at (20 3) C in distilled or deionised water, ensuring that the water covers the test specimens by at least 10 mm. In order t
39、o prevent the test specimens floating, the specimens are kept submerged by a grid as specified in 5.8. 8.2 Freezing in air and thawing in water Remove the test specimens from the containers and allow them to drain on a sieve with a maximum size of 2 mm for about 1 min. Then place them back into the
40、containers spreading them out evenly. Place the containers in the low temperature cabinet, ensuring that the heat is extracted as uniformly as possible from all sides of all test specimens. The distance between each container, and between the containers and the sidewalls of the cabinet, shall not be
41、 less than 50 mm. After placing the containers in the cabinet, hold the air temperature in the cabinet at (17,5 2,5) C. The containers with the test specimens shall remain in the cabinet for minimum of 240 min. After completion of the freezing cycle, remove the containers from the cabinet, add water
42、 to the containers with the test specimens and store for at least 60 min in a water bath at a temperature of (20 3) C. In order to prevent the test specimens floating, the specimens are kept submerged by a grid as specified in 5.8. Pour off the water from the containers carefully and allow the test
43、specimens to drain for about 1 min. Then start the next freezing cycle. In total 20 freezethaw cycles shall be performed. If it is necessary to interrupt the test, the test specimens should remain in the cabinet at (17,5 2,5) C. On completion of the 20th freezing and thawing cycle, pour the contents
44、 of each container into a sieve having an aperture size that is half the lower size sieve used to prepare the test specimen (e.g. in case of the 8 mm to 16 mm fraction, pour into a test sieve of 4 mm aperture size). Wash and sieve the test specimen on the specified sieve by hand. Dry the residue rem
45、aining on the sieve at (110 5) C to constant mass, cool at ambient temperature and weigh immediately (M2,see Clause 9). 9 Calculation and expression of results Calculate the loss in mass (FLi) of each test specimen in accordance with the following formula: FLi= (M1- M2)/M1 x 100 where DIN EN 1367-7:
46、2014-07EN 1367-7:2014 (E) 7 FLiis the percentage loss in mass of the test specimen; M1is the initial dry mass of the test specimen before freezethaw cycling, in grams; M2is the final dry mass of the test specimen after freezethaw cycling, that is retained on the specified sieve, in grams. Express FL
47、ito the nearest 0,01 %. Calculate FL as the mean of the three individual test results to the nearest 0,1 %. 10 Test report 10.1 Mandatory data The test report shall include the following information: reference to this European Standard; identification of the test sample, including identification of
48、the source, aggregate size and date of sampling; sample reception date if different from sampling date; identification of the laboratory; percentage of mass loss after freezing and thawing FL, expressed to the nearest 0,1 %; deviations from the reference method, if any. 10.2 Optional data The test r
49、eport can include the following information: date of test; reference to the chosen sampling procedure; reference to the chosen sample reduction procedure; percentage of the mass loss after freezing and thawing of the individual test specimens FLi, expressed to the nearest 0,01 %. DIN EN 1367-7:2014-07EN 1367-7:2014 (E) 8 Bibliography 1 EN 1097-5, Tests for mechan
