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BS英标：混凝土与砌体后锚固选择安装规程 8539-2012.pdfgure C.5Shield type expansion anchor
Ficure C.6
JB／T 7757-2020 机械密封用O形橡胶圈.pdfBS8539:2012
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Figure C.8
drivenfullytothebaseoftheanchor
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C.1.4Bonded anchors
Figure C.12
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Bonded anchor with internally threaded sor
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Figure C.18Injection cartridge
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Bonded anchors use resins of various formulationst
polyester; vinylester; epoxy acrylate; NOTE3The resin formulationknown as"epoxy acrylate"bears no relation to pure"epoxy"resin, whose characteristics,applications and method of installation are different. They are not to be confused or interchanged. hybrids, whose formulation includes cementitious material; pure epoxy; cementitious; hybrids; methacrylate.
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G3 Plastic anchors
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Figure C.21Traditional plastic plug
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Metal injectionanchors forusein
Injection systems identical or similar to those to be used for anchoring into concrete might be suitable for masonry material (see Figure C.24), as they cater well for porous materials, voids in brickwork due to frogs or poorly filled mortar joints and, with suitable accessories, for perforated bricks and hollow blocks (see Figure C.25 and Figure C.26). Special systems are available for use in aerated concrete involving the drilling of an outwardly tapering hole (see Figure C.27), to form an interlock with a large volume of this relatively weak material,
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Bonded anchor used in solid double skin (not cavity) brickwork using steel mesh sleeve cocontrolresinlossingapbetweenbricks
FigureC.27 Special injectionanchorwithoutwardtaperingholeforuseinaeratedconcrete
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Figure D.1 outlines the process for determining which anchor type may be used in concrete inrelation tothe various ETAs that are available. FigureD.1 Flow chart for process of determining anchor usage in relation to ETAs in concrete
Figure D.1 outlines the process for determining which anchor type may be in concrete in relation tothe various ETAs that are available. FigureD.1 Flow chart for process of determining anchor usage in relation to ETAs in concrete
Figure D.1 outlines the process for determining which anchor type may be used in concrete in relation to the various ETAs that are available.
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Figure D.2 outlines the process for determining which anchor type may be used in concrete in relation to the various ETAs that are available. FigureD.2 Flow chart for process of determining anchor usage in relation to ETAs in masonry
Figure D.2 outlines the process for determining which anchor type may be in concrete in relation to the various ETAs that are available. Figure D.2 Flow chart for process of determining anchor usage in relation to ETAs in masonry
Figure D.2 outlines the process for determining which anchor type may be used in concrete in relation to the various ETAsthat are available.
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Staticactions
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anchors are available with these thicker coatings.(The term"galvanized", when used by manufacturers from continental Europe,usually means electroplating of typically, only 5 μm.) Oxidation of stainless steel and aluminium, on the other hand, is what produces the slightly dull patina which, under normal conditions, protects these materials formfurthercorrosion
Fixture metal
Fixture metal
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EF3Chemical corrosion
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ype of corrosion occurs in areas of high atmospheric pollution or marine onments,and in this case even grade A4 stainless steel might have a ed life expectancy.Special alloy stainless steels are available for these ions (seeF.6)
This type of corrosion occurs in areas of high atmospheric pollution or marine environments, and in this case even grade A4 stainless steel might have a reduced life expectancy. Special alloy stainless steels are available for these situations (see F.6),
F4Stress corrosion
Stress corrosion occursinconditionswhere elevatedtemperaturescoincide with moisture and the presence of corrosive gases, particularly chlorides, e.g. swimming pool roof spaces and road tunnels. Normal materials, including grade A4 stainless steel, might not be suitable.The risk of stress corrosion cracking is greater for leaner alloys (grade A2 and grade A4) austenitic stainless steels.The use of more highly alloyed austenitic or duplex stainless steels can mitigatethe risk of stress corrosion cracking occurring
E5Pitting corrosion
F6Crevice corrosion
crevice corrosion, and the addition of molybdenum is also beneficial.
The use of isolating gaskets is helpful but will not always prevent corrosion occurring, so it is important that a good fit between the gasket and the metal is achieved, to avoid crevices being formed in stagnant conditions. Materials which are capable of resisting pitting corrosion are usually capable of resisting crevice corrosion
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Bibliography
Standards publication
Otherpublications
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CONSTRUCTIONFIXINGSASSOCIATION.Anchorage systems for scaffolding. CFA Guidance Note.Oakham, Leicestershire: CFA, 1990.7) CONSTRUCTION FIXINGSASSOCIATION.Anchors forsteeplejacking CFA Guidance Note. Oakham, Leicestershire: CFA, 2008.7) CONSTRUCTION FIXINGS ASSOCIATION.Fixings forplasterboard.CFA Guidance Note. Oakham, Leicestershire: CFA, 1995.7) CONSTRUCTION FIXINGS ASSOCIATION.Fixings forthe retention of masonry facades. CFA Guidance Note. Oakham, Leicestershire: CFA,2004.7)
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GB／T41741-2022 凹凸棒石黏土分级及测试方法.pdfBRITISH STANDARD
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