BS 8221-1-2012 Code of practice for cleaning and surface repair of buildings Cleaning of natural stone brick terracotta and concrete《建筑物的清洁处理和表面检修的实施规范 自然石材 砖 红陶土砖和混凝土的清洁处理》.pdf
《BS 8221-1-2012 Code of practice for cleaning and surface repair of buildings Cleaning of natural stone brick terracotta and concrete《建筑物的清洁处理和表面检修的实施规范 自然石材 砖 红陶土砖和混凝土的清洁处理》.pdf》由会员分享,可在线阅读,更多相关《BS 8221-1-2012 Code of practice for cleaning and surface repair of buildings Cleaning of natural stone brick terracotta and concrete《建筑物的清洁处理和表面检修的实施规范 自然石材 砖 红陶土砖和混凝土的清洁处理》.pdf(46页珍藏版)》请在麦多课文档分享上搜索。
1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS 8221-1:2012Incorporating corrigendum No. 1Code of practice for cleaningand surface repair ofbuildings Part 1: Cleaning of natural stone,brick, terracotta and concretePublishin
2、g and copyright informationThe BSI copyright notice displayed in this document indicates when the documentwas last issued. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 80052 8ICS 91.040.01The following BSI references relate to the work on this standard:
3、Committee reference B/560Draft for comment 11/30241242 DCPublication historyFirst edition April 2000Second (current) edition July 2012Amendments issued since publicationDate Text affectedJuly 2012 C1- See forewordBS 8221-1:2012 BRITISH STANDARDContentsForeword iiIntroduction 11 Scope 12 Normative re
4、ferences 13 Terms and definitions 24 Considerations affecting cleaning decisions 25 Stonework 106 Clay and calcium silicate brickwork 157 Terracotta and faience 178 Concrete 179 Removal of specific deposits 1810 Cleaning methods 2211 Health and safety 29AnnexesAnnex A (normative) Precautions for han
5、d cleaning 31Annex B (normative) Precautions for water cleaning 31Annex C (normative) Precautions with abrasive cleaning 32Annex D (informative) Further information on chemical cleaning 33Bibliography 38List of tablesTable 1 Factors affecting choice of cleaning method 4Table 1 Factors affecting choi
6、ce of cleaning method 5Table 2 Geological groups of rocks and examples of building materials 11Table3Types of sandstone and their potential resistance to weathering andsoiling 12Table 4 Sandstone matrices and their potential resistance to weathering andsoiling 12Table 5 Operating pressures 24Table 6
7、 Hardness of abrasives 26Summary of pagesThis document comprises a front cover, an inside front cover, pages i to ii,pages 1 to 40, an inside back cover and a back cover.BRITISH STANDARD BS 8221-1:2012 The British Standards Institution 2012 iForewordPublishing informationThis part of BS 8221 is publ
8、ished by BSI Standards Limited, under licence fromThe British Standards Institution, and came into effect on 31 July 2012. It wasprepared by Technical Committee B/560, Conservation of tangible culturalheritage. A list of organizations represented on this committee can be obtainedon request to its se
9、cretary.Information about this documentThe start and finish of text introduced or altered by Corrigendum(a) No. 1 (andNo. 2) is indicated in the text by tagsg33andg34.Supersessiong33This part of BS 8221 supersedes BS 8221-1:2000, which is withdrawn.g34Hazard warningsWARNING. This British Standard ca
10、lls for the use of substances and/orprocedures that can be injurious to health if adequate precautions are nottaken. It refers only to technical suitability and does not absolve the userfrom legal obligations relating to health and safety at any stage.Use of this documentAs a code of practice, this
11、part of BS 8221 takes the form of guidance andrecommendations. It should not be quoted as if it were a specification andparticular care should be taken to ensure that claims of compliance are notmisleading.Any user claiming compliance with this part of BS 8221 is expected to be able tojustify any co
12、urse of action that deviates from its recommendations.Presentational conventionsThe provisions in this standard are presented in roman (i.e. upright) type. Itsrecommendations are expressed in sentences in which the principal auxiliaryverb is “should”.Commentary, explanation and general informative m
13、aterial is presented insmaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a British Standard can
14、not confer immunity from legalobligations.BRITISH STANDARDBS 8221-1:2012ii The British Standards Institution 2012IntroductionThis British Standard is intended to give building owners, architects, surveyors,engineers, and contractors general information on cleaning.Buildings are cleaned either to enh
15、ance their appearance or to assistmaintenance and/or conservation.Reasons for wanting to enhance appearance include:a) removal of disfigurements (e.g. stains, graffiti); revealing the nature, colouror details of a building; andb) unification of the appearance of a building that has been altered, ext
16、endedor repaired.Reasons for cleaning a building prior to maintenance and/or conservationinclude:1) removal of harmful or undesirable deposits or applied materials from thefabric in order to slow down the rate of decay;2) exposure of concealed defects, where surfaces are very thickly soiled, inorder
17、 to establish the extent and nature of repairs required;3) preparation of a surface for additional treatments; and4) to fulfil the terms of a lease that requires periodic cleaning of a building.Buildings have a variety of surfaces and materials and types of soiling that eachneed to be cleaned with a
18、ppropriate methods and materials. It is essential toidentify, in advance, the type, properties, and condition of masonry (inparticular, whether it is limestone or sandstone) and jointing materials.1 ScopeThis part of BS 8221 gives recommendations on the removal or partial removalof deposits from the
19、 original surface or substrate of a building.It includes the principal cleaning methods in use and the characteristics ofsurface deposits. It is applicable to the cleaning of natural stones, clay brick,calcium silicate brick, glazed and unglazed terracotta/faience, and cast concreteand concrete prod
20、ucts such as cast stone, concrete brick and concrete blockwork.2 Normative referencesThe following referenced documents are indispensable for the application ofthis document. For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (i
21、ncluding anyamendments) applies.BS 1139-2 Metal scaffolding Part 2: Couplers Aluminium couplers and specialcouplers in steel. Requirements and test methodBS 1139-4 Metal scaffolding Part 4: Specification for prefabricated steelsplitheads and trestleBS 2482, Specification for timber scaffold boardsBS
22、 6037 (all parts), Code of practice for permanently installed suspended accessequipmentBS 6100-5, Building and civil engineering Vocabulary Part 5: Civil engineering Water engineering environmental engineering and pipe linesBS 6100-6, Building and civil engineering Vocabulary Part 6: Constructionpar
23、tsBRITISH STANDARD BS 8221-1:2012 The British Standards Institution 2012 1BS 8221-2, Code of practice for cleaning and surface repair of buildings Part 2:Surface repair of natural stones, brick and terracottaBS EN 39, Loose steel tubes for tube and coupler scaffolds. Technical deliveryconditionsBS E
24、N 1004, Mobile access and working towers made of prefabricated elements.Materials, dimensions, design loads, safety and performance requirementsBS EN 12811-1, Temporary works equipment. Part 1: Scaffolds. Performancerequirements and general designBS EN 15898, Conservation of cultural property. Main
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