the facade seem less severe. For structural glazing silicone adhesive sealants Sikasil® SG see page 16. SIKA F&F SPECIFICATION GUIDE – FACADE
48 pages
265 KB – 48 Pages
PAGE – 3 ============
3SIKA F&F SPECIFICATION GUIDE Œ CONTENTS CONTENTS 04INTRODUCTION 06FACADE TECHNOLOGIES 08101112131416181920 22STRUCTURAL GLAZING FACADE SYSTEM COMPONENTS Œ GLASS AND METAL FRAME Sikasil® SILICONE SEALANTS IN DETAIL ONE-PART VS. TWO-PART SILICONES MECHANICAL PROPERTIES BEHAVIOR AND RESISTANCE Sikasil ® SG SILICONE ADHESIVES JOINT DESIGN CALCULATING JOINT BITE CALCULATING JOINT THICKNESS ULTIMATE SAVINGS BY STRENGTH Sikasil® SG-550, Sikasil® IG-25 HM P lus2426 272829INSULATING GLAZING Sikasil® IG SECONDARY SEALANTS Sikasil® IG-25 HM P lus Œ ENERGY-SAVING WITH INERT GAS FILLING SEAL HEIGHT CALCULATION EFFECT OF ENVIRONMENTAL LOADS 3030 3234WS WEATHERSEALS Sikasil ® WS WEATHERSEALS NATURAL STONE SEALING FIRE-RATED SEALING ANCILLARY PRODUCTS 36 383940SIKAMEMBRAN® SYSTEM SikaMembran® SYSTEM Œ PERFECT VAPOR PROOFING IN ALL CLIMATES SikaTack® Panel SYSTEM Œ RAIN SCREEN CLADDING SikaDamp ® Œ NOISE REDUCTION IN PANEL WALLS SikaForce® GG GLASS GROUT Œ STRESS FREE GLASS EMBEDDING 4243444546PROJECT SERVICE SYSTEMATIC PROJECT WORKFLOW TRIPLE-TESTED QUALITY PROJECT TESTS SUPPORT BEYOND STANDARDS 3536
PAGE – 4 ============
4SIKA F&F SPECIFICATION GUIDE Œ INTRODUCTION INTRODUCTION High-tech Solutions for Perfect Facades ARCHITECTURE THRIVES ON CHANGE. On creative ideas and bold solutions that fascinate and surprise us every time. Curtain walls are a particularly severe challenge for planners, because they not only set the character of the structure but must also meet stringent requirements. CREATIVE FACADE ARCHITECTURE To strike the ideal balance between aesthetic appeal and energy e˜ciency, architects are increasingly turning to glass for curtain wall construction. As transparent structural glazing walls, single, double or triple glazed or even double skin facades. Glass can also be combined with other materials such as natural stone, metals or plastic coated metals, giving planners a wide scope for creativity. But an immaculate optical appearance isn™t the only crucial factor. Facades and windows must provide long-term durable systems. This requires perfect adhesion between the components and highly elastic, weatherproof seals. These speci˚cations call for high-tech silicone sealants, which are tailored to meet highly speci˚c demands and guarantee peak performance in every respect. With this application in mind, Sika supplies a wide range of tried-and-tested, innovative facade products for every demand: ˛Sikasil®. Each of these sealants and adhesives has highly speci˚c properties that are precisely tailored to the particu -lar application. From structural glazing and insulating glass secondary seals through to weatherseals. ˛SikaMembran® membrane systems supplement ideally the sealants range for water/ vapor proo˚ng wide joints in both curtain wall and ventilated facades. ˛The self-leveling PU grout SikaForce® GG is an easy-to-apply product for stress-free embedding of glass balustrades and glass walls in ˚n glazing. Find more solutions for curtain wall facades on pages 36 to 40 and in our brochure Sika Œ Sealing and bonding in facade and fenestration. bottom Francis Crick Institute, ˜˚˛˝ Architect HOK, PLP Architecture; Facade Scheldebouw, Josef Gartner
PAGE – 5 ============
5top right and cover: Hospital Rey Juan Carlos, Madrid, ˜˚˛˜ Architects Rafael De La-Hoz Facade Permasteelisa Spain Curved Glass Cricursa bottom right: National Swimming Center (Water Cube), Beijing, ˜˚˚˙ Architects State Construction Engineering Corp., PTW Architects Facade Shenyang YuanDa left: Royal Ontario Museum, Toronto, ˜˚˚ˆ Extension Michael Lee-Chin Crystal Architects Studio Daniel Libeskind Facade Josef Gartner CREATIVE DESIGN, CHALLENGING LOADS, INNOVATIVE MATERIALS SIKA F&F SPECIFICATION GUIDE Œ INTRODUCTION Sika has the Right Solutions
PAGE – 6 ============
6FOUR-SIDED STRUCTURAL GLAZING Frameless Appearance Four-sided structural glazing is impressive ˚rst and foremost because of its monolithic frameless appearance. All four sides of the large-format pane element are bonded to an adapter pro˚le with Sikasil® SG silicone adhesive sealants and have no visible frame. These prefabricated glass modules are subsequently attached to the support structure so that the facade gives the appearance of a ˝at glass surface. The dynamic loads are transmitted through the silicone adhesive. To support the dead load of the glass, we recommend a mechanical support that is not visible from the outside. Advantages of this System ˛Attractive appearance without visible frames ˛Thanks to its high elasticity, the silicone sealant can trans -mit the loads at all four sides more e˜ciently and uniformly ˛Temperature distribution in the glass is ideal, since there are no cap pro˚les, which would act as shades. This reduces the risk of glass breakage caused by thermal stresses ˛The facade is more energy-e˜cient as there are no external metal parts and all joints are sealed ˛Greater self-cleaning from level glass TWO-SIDED STRUCTURAL GLAZING Mechanical Fixing In the two-sided structural glazing system, only two mutually opposite glass or panel edges are bonded (horizontally or vertically) to a frame with Sikasil® SG silicone adhesive. The two other mutually opposite sides are ˚xed mechanically like capped CW systems. Mechanical ˚xing of the glass element at two sides does not a˙ect the loads on the two bonded sides. Since excessive bending of the glass must be prevented, the minimum dimensions of the joint must not be changed compared to a four-sided system. Advantages of this System ˛High mechanical safety ˛The silicone adhesive and the mechanical fasteners help distribute the dynamic forces ˛Metal cap pro˚les can be used as design elements to make the facade seem less severe For structural glazing silicone adhesive sealants Sikasil® SG see page 16. SIKA F&F SPECIFICATION GUIDE Œ FACADE TECHNOLOGIES FACADE TECHNOLOGIES STRUCTURAL GLAZING SYSTEMS can be either two-sided or four-sided, with each design having its own particular advantages. In general, for efficient and energy-saving building management, double and triple glazing is recommended. ˆˇ12Optimum Transparency Optimum Safety Durable Solutions for Every Design
PAGE – 8 ============
8STRUCTURAL GLAZING Sophisticated Architecture and Innovative Technology STRUCTURAL GLAZING MODULES are subject to extremely high stress -es. They must accommodate wind and snow loads as well as thermal expansion, and permanently transfer the forces to the support structure, while also withstanding weathering over many years. DURABLE CONSTRUCTION Sikasil® SG silicone adhesive sealants are used in structural glazing for bonding the glass elements to the metal support frames. The elements may be designed as single glazing or insulating glazing to provide an insulating facade, which forms the complete building envelope and guarantees excellent corrosion protection. Coated multifunctional insulating glazing provides the necessary protection against the sun. Other variants include double skin facades produced with single glazing elements. The elastic joints produced with Sikasil® SG silicone adhesives accommodate movements of the construction elements resulting from temperature changes, moisture, shrinkage of construction materials, sound, wind and vibrations. Permanently. ECONOMICAL CONSTRUCTION Structural glazing facades have both technical and economical advantages: ˛The factory-produced units can be installed quickly and economically (unitized glazing) ˛An e˜cient insulating facade slashes thermal losses, provi -ding a much improved energy balance ˛High solar heat recovery can be taken into account in the energy balance ˛Acoustic insulation is improved by insulating glazing and elastic silicone sealant ˛These easy-to-clean facades have low maintenance and cleaning costs ˛Repairs can be carried out much more economically by quick and easy module exchange INTEGRATED SYSTEMS A fully integrated structural glazing system is only possible if a number of conditions are met: ˛Project-speci˚c computation of the joint dimensions so that the system can be perfectly executed down to the last detail ˛Factory bonding of the industrially manufactured glass modules with extreme positional accuracy ˛Frame construction exactly tailored to the type of facade ˛Sealants and weatherseal gaskets of compatible high- quality materials, which meet the strictest construction regulations and international standards ˛Stringent quality control on all the products used, from production through to application Menara Bank Islam (Menara Wakaf), Kuala Lumpur, ˜˚˚˛ Architects RSP Architects Facade Puspajaya Aluminium SIKA F&F SPECIFICATION GUIDE Œ STRUCTURAL GLAZING
PAGE – 9 ============
STRUCTURAL GLAZING Œ THE PRINICIPLESTRUCTURAL GLAZING Œ CONVINCING ENERGY PERFORMANCE IN ALL DETAILS The illustration shows a structural glaz -ing module prototype. This drawing is not intended as a construction guide. More elaborate, additional structural elements may be needed to satisfy national construction regulations or project-speci˚c requirements. A Adapter frame B Weatherseal C Setting block D Mechanical support E Backing material F Structural glazing joint G Spacer tape H Secondary edge seal J Stepped insulating glass unit K Symmetric insulating glass unit Comparison of the U f values show the better energy per -formance of the SG system (Fig ˇ: ˆ.ˇ Wm -ˇK-ˆ ) vs capped curtain wall system (Fig ˆ: ˇ.m -ˇK-ˆ ) But some of the advantage is lost if the facade is not properly sealed. Compare Fig ˘ (gaskets, ˆ.m -ˇK-ˆ ) and Fiwet sealant, ˆ.m -ˇK-ˆ ) Fig. ˆ Fig. ˘ Fig. ˇ Fig. 3AJKHFBCDEGGBFCHAE˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜- – – – ˇ °C C -ˆ °C
PAGE – 10 ============
10SIKA F&F SPECIFICATION GUIDE Œ STRUCTURAL GLAZING FACADE SYSTEM COMPONENTS Œ GLASS AND METAL FRAME GLASS 1. Uncoated Float Glass Float glass is generally suitable for all bonded glass facades. To reduce the risk of damage from glass breakage, use tempered or laminated glass (with polyvinyl butyral ˚lm, PVB or alternative foil materials, e.g. ionomers.) Sikasil® SG silicone adhesives ensure excellent adhesion to tempered glass without additional tests. Where laminated glass is used, we recommend carrying out compatibility tests. 2. Pyrolytic Coatings for reˇective Glass (Hard Coatings) Coated glass optimizes the thermal performance of the facade while providing a particularly attractive optical e˙ect. Pyrolytic coatings (hard coatings) of metal oxides are ideal for structural glazing, since they resist environmental conditions. Before application of Sikasil® SG and IG silicone adhesives adhesion test must be performed on the coatings. 3. Magnetron Coatings for lowE Glass (Soft Coatings) These coatings contain precious metals (such as silver) and are generally not resistant enough for use in structural glazing bonds. If necessary, strip o˙ the coating around the bond. Adhesion must therefore be tested on the abraded specimens, since abrasion represents a modi˚cation of the surface, and is subject to various parameters. Always observe the glass manufacturer™s instructions. 4. Ceramic Coatings Ceramic coatings are used predominantly in the spandrel area. At the edge regions of the glass, they cover color di˙erences within the insulating glazing edge seal and between the edge seal and the structural glazing adhesive. The adhesive strength of Sikasil® SG silicone adhesives has been proven in numerous projects and tests according to the European guideline for bonded glass structures (EOTA ETAG 002). However, since the composition of the coatings may vary greatly, individual adhesion tests must be carried out for each project. ˙˚ and ˛˚˚ Victoria Street, London, ˜˚˚˘ Architects EPR Architects; Facade Josef Gartner GmbH ADAPTER FRAME The adapter frame is usually made of the following materials: ˛Anodized aluminum ˛Powder-coated aluminum ˛PVDF-coated aluminum ˛Stainless steel Sikasil® SG silicone adhesives and Sikasil® WS sealants adhere very well to these materials. Sika carries out additional tests to check the representative surface quality used in every individual project. Furthermore the organic coating system has to be approved for structural glazing application by both coating producer and coater (e.g. complying EOTA ETAG 002 part 2). The durability of the coating system must be adequate to the life expectancy of the structural bonding application. On organic coatings tried-and-tested pretreatment agents like Sika® Aktivator-205 and Sika® Primer-790 have proven to accelerate the formation of adhesion and optimize the adhesion pro˚le and durability.
PAGE – 11 ============
11SIKA F&F SPECIFICATION GUIDE Œ STRUCTURAL GLAZING Sikasil ® SILICONE SEALANTS IN DETAIL SPECIALIZED PRODUCTS High-modulus Sikasil® SG silicone adhesive sealants o˙er the best properties for this purpose. The latest development with highest design strength is described on page 22. Special high-modulus Sikasil® IG silicone secondary sealants allow very low argon loss rates in structural glazing facades. Sika™s low-modulus Sikasil® WS weatherseals accommodate the movements between the structural glazing modules and durably seal them against wind and weather. The elastic seal can even reduce damage in small to medium-scale earthquakes and bomb blasts. Sikasil® FS silicones comply with international ˚re standards. TAILORED PRODUCTS Sealants are classi˚ed according to their curing mechanism into acidic (which emit acetic acid on curing) and neutral systems (which emit oxime or alcohol on curing). For facades, solvent-free, non-corrosive neutral technology is used almost exclusively. The exceptions are all-glass structures, which can also be sealed with acetic-curing sealants. ADAC Headquarters, Munich, ˜˚˛˛ Architects Sauerbruch Hutton Architects; Facade Josef Gartner GmbH TYPICAL PROPERTIES OF NEUTRAL SEALANTS ˛A wide range of adhesion properties for a variety of applications ˛Outstanding adhesion and bonding power to glass and metal surfaces ˛Early load-bearing, thanks to high initial elasticity ˛Reliable and non-corrosive to sensi -tive materials when used in move -ment joints, expansion, construction and connection joints ˛Application-speci˚c curing time with di˙erent vulcanization rates and optimum curing ˛Uniform long-term elasticity ˛Good elastic recovery ˛Durable and extremely strong ˛Outstanding weathering and ageing resistance ˛Extremely good UV and oxidation stability ˛Good chemical resistance ˛Resistant and ˝exible even with ex -treme temperature ˝uctuations from Œ50 °C to +150 °C ˛Low shrinkage in vulcanization ˛Long-term resistance to continuous rainfall SEALANT COMPOSITION Sikasil® silicone sealants generally consist of the following components: ˛Silicone polymer ˛Silicone plasticizer ˛Silicone cross-linker ˛Silicone adhesion promoter ˛Reinforcing ˚llers (e.g. fumed silica) ˛Possibly non-reinforcing ˚llers, such as silicates, chalks, etc. ˛Optionally, additives such as emulsi -˚ers, pigments and fungicides
265 KB – 48 Pages