1、BRITISH STANDARD Methods of test for masonry - Part 1: Determination of compressive strength The European Standard EN 10521:1998 has the status of a British Standard ICs 91.080.30 BS EN 1052-1: 1999 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGm LAW STDBBSI BS EN 1052-1-ENGL 1777
2、W LbZLibb9 075Li77l 77T = been prepared under the Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 16 January 1999 direction of the Sector AmdNo. O BSI 01-1999 ISBN O 580 30735 2 BS EN 1062-k1999 Date Text affected Na
3、tional foreword This British Standad is the English language version of EN 1052-11998. It is intended that it will partially supersede BS 5628, Code ofpmcticefor use of masonry, BS 662811992, SErUchd use of unwinfm mmmry, the equivaient masonry test method of which will be withdrawn on 30 September
4、2000 if all of the European standards included in the proposed package of stanw, upon which EN 1052-1 is reliant, are available. The UK participation in its prepamtion was entruskd by Technical Com B/s19, Masonry and associated testing, to Subcommittee B/519/4, lsts, which has theresponsibjilityta -
5、 aid enquirers to undexstand the text; - present to the responsible European committee any enquiries on the - monitor reW internationai and European developments and promulgate intapretation, or proposais for change, and keep the UK interests informed; themintheuK. A list of oqpkations representd on
6、 this subcommittee can be obtained on request to its sem-. Cross-references The British Standards which implement mtemational or European pubhations referred to in this document may be found in the BSI Standards catalogue under the section entitied uInemational standards Correspondence Index“, or by
7、 using the Find“ facility of the BSI standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract Um of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity
8、from legal obiigations. EUROPEAN STANDARD NORME EUROPENNE EXJROP- NORM EN 10521 September 1998 ICs 91.080.30 Descriptors: masonry work, structural members, mechanical tests, determination, compressive strength English version Methods of test for masomy - Part 1: Determination of compressive strength
9、 M,thodes dessai de la maonnerie - Partie 1: Dtermination de la rsistance la compression prufverfahen fr Mauerwerk - Rdl: Eksthnmung der Druckfestigkeit This European Standard was approved by CEN on 4 September 1998 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stip
10、ulate the conditions for giving this European standard the status of a national standard without any ahration. Uptodate lists and bibliographicd references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists
11、 in three official versions (English, French, German). A version in any oher language made by transation under the responsibility of a CEN member into its own hguage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of
12、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Gemanx Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comit Europen de Nomakation Europisches Komitee fr Normung Central Secr
13、etariat: rue de Stassart 36, B-1050 Brussels O 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1052-1:1998 E Page 2 EN 1052-1:1998 Forewor “his European Standard has been prepared by Technical Committee CENK 125, Mww, the secr
14、etariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identicai text or by endorsement, at the latest by March 1999, and confliding national standards shai be withdrawn at the latest by September 2000. “his hpean standar
15、d has been prepared under a mandate given to CEN by the European Commission and the European Free We Association and supports the essential requirements of the Eu Construction Products DIl.ective (8!Y106/EEC) and includes the performance requirements referred to in the Eurocode for masonry strum. Ac
16、cording to the CEN/CENEUC Jnted Regulations, the nationai standards organizatons of the foiiowing countries am bound to implement this European StanM Austria, Belgium, Czech Republic, Denmark, Finland, France, -, Greece, Iceland, Irehd, It (N/mm2) is the modulus of eiasticity of an individual masonr
17、y specimen, (N/mm2) is the maximum load reached on an individual masonry specimen, (N) is the mean compressive strength of the masonry, (Nhnm2 is the compressive strength of an individual masonry specimen, (/mm2) is the smallest compressive strengh of an individual masonry specimen, (N/mm2) is the a
18、djusted individual masonry compressive strength, (/mm2) is the smallest austed compressive strength of an individual masonry specimen, (N/mm2) is the characteristic compressive strength of the masonry, (/mm2) is the mean compressive strength of masonry units at the time of the masonry test, Wm2 is t
19、he specified mean compressive strength of the masonry units, (N/mm2) is the mean dusted compressive strength of the masom, (hnm2) is the mean compressive strength of the mortar at time of the masonry test, (/mmZ) is the specified mean compressive strength of the mortar, (hnm2) is the height of the s
20、pecimen, (mm) is the height of the masonry unit, (mm) is the length of the specimen, (mm) is the length of the masonry unit, (mm) is the thickness of the specimen, (mm) is the width of the masonry unit, (mm) is the mean strain in an individual masonry specimen at one third of the maximum strength ac
21、hieved. O BSI 01-1999 STD-BSI BS EN 1052-1-ENGL 1999 D LbZL(bb9 0754778 515 Maximum permissible repeatability of forces as percentage of indicated force % 2,o Page 4 EN 106241998 M8Ximum Maximum permissible mean permissible error error of forces as of zero force ILS percentage of percentage of indic
22、ated maximum force force of range % % *,O *,4 6 Makerial 8.1 Masonry units 6.1.1 Sampling Au of the masonry units for indMdual tests and for making the masonry specimens shall be aken from the same consignment. 6.1.2 CondZtZoning ofthe units The conitioning of masomy units shall be as spec% - the ma
23、ximum load Fi,- in Newtons to the nearest 1 IrN, - the load at which visible cracks occw, - the length of time fmm the start of loading unt the maximum load is achieved. If the modulus of elasticity is to be determine4 displacement measuremenis with an accuracy on the strains off25 x 10-6 hall be ta
24、ken at the four measuring points shown in Figure 1 up to about 50 per cent of the maximum load 9 Cculations 9.1 Expression of strength results CaicW the compressive strength of each masonry specimen to the nearest Oll Nhz, using the following formula. - Fi max fi- Ai Mean compressive strength at tim
25、e of testing (f,) Nlm2 1,0 5 fm of the masonry specimens to the nearest 0,l Nh2. Where the compressive strength of the masonry units and of the mortar at the time of testing deviate hm the specied values the test dts shal be converted in accordance with mexk 10.2 Characteristic compressive strength
26、CalcW the characteristjc compressive strength of masonry, to the neareSt0,l Nhz, hm a) or b), whichever is the greater a) = 81,2 or fk = fi, b) name of the testing laboratory; c) number of specimens; d) date of building the specimens; e) curing conitions (time, temperature, humidity); f) date of tes
27、ting the specimew, g) description of the specimens, including dimensions, number of courses, loaded cros-sectional area, bonding pattern of the specimen in the testing machine; h) description of the masonry units and the mortar (to include also details of the mortar mixing procedure, flow value, air
28、 content and compressive strength), preferably consisting of the appropriate test reports, or of extracts taken hm these reports, i) age of non-autoclaved concrete units at the time of testing the masonry; j) moisture content by mass of autoclaved aerated concrete and dcium silicate units or, for ot
29、her types of unit, the method of conditioning prior to the time of laying; k) maximum loads reached by the tmt specimens; 1) the length of time from the start of loading until the maximum load is achievd, m) mean compressive strength of the masonry units in N/mm2 to the nearest 0,l Nhnm2 and the coe
30、fficient of variation; n) mean compressive strength of the mom in N/mm2 to the nearest 0,l Nh2 and the coefficient of variation, at the time of testing the masonry; o) individual values of the compressive skength of the masonry specimens in Nh2 to the nearest 0,l N/mm2; p) mean and characteristic co
31、mpressive strength of the masonry in Nh2 to the nearest 0,l N/mm2; q) statistical treatment of the results where relevant; r) adjusted values of mean and characteristic strength of masonry (if appropriate); s) stress in N/m2 at which the frrst visible crack occurred; t) mean and individual dues for
32、the modulus of eiasticity in Nh2 (where specified) to the nearest 100 N/mm2; u) remarks, if any O BSI 01-1999 STD-BSI BS EN 1052-I-ENGL 1777 1b24bb7 0754782 T9b Page 8 EN 1062-1:lrn Annex A (normative) Agjustment of mean compressive s-m if the compressive sixmgth of the masonry units, andor the mort
33、ar, at the time of masonry testing deviate hm the specified stmngtb of the masonry units (fbd) or mortar omd, then the masonry compressive strength determined from the testing shall be converted to the equivaient masonry strength relevant to the specified unit and mortar strengths using the foiiowui
34、g equation: Cacuhk fa as the mean of the inividuai valuesfa. Conversion of compressive strength values for units sha oniy be &ed out when the tested mean stmngth of the units is within e6% of the speciied stnngth and the mortar stsength falls within the range given in 141ble 3 and the mortar is of t
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