Structural design and construction with precast concrete elements requires versatile products, from wet precast production to erection on site. Sika, a full range supplier, meets the diverse complexity of the entire precast concrete element production and construction process with solutions for all requirements.
Systems and Knowhow
In wet precast concrete production and application, there are many factors to consider. Do you need swift concrete production with high concrete performance or extended service life and surface appearance that never loses its aesthetic integrity? When it comes to concrete, Sika provides more than admixtures. We provide both expertise and comprehensive systems to help solve your problems and challenges.
Concrete production
Surface appearance
Repair
Bonding
Anchoring
Grouting
Basement waterproofing
Protection
Sealing
1. Concrete Production
Workability Improvement
High Early Strength Development
Extended Durability
High range water reduction combined with required workability time with Sika® ViscoCrete®
Secured production of self-compacting concrete even in the presence of difficult raw materials with Sika® ViscoCrete® and Sika® Stabilizer VMA
High water reduction leading to fast early strength development and high final strengths with Sika® ViscoCrete®
Effective acceleration with SikaRapid®-1 / SikaRapid®-3 (hardening accelerators) and SikaRapid®-2 (set accelerator) for ensured early green strength
Extended longevity of concrete with the highest concrete impermeability with Sika® ViscoCrete® and SikaFume®
Durability enhancement with regard to shrinkage crack reduction, fire resistance or impact resistance with SikaFiber®
Protection against chloride-induced corrosion with Sika® FerroGard®-901 S integral corrosion inhibitor
2. Surface Appearance
Mold Release Agent
Production of Exposed Aggregate Concrete
Coating to Improve Appearance and Durability
Improved Concrete Surfaces and Finishing
Mineral oil-based standard mold release agent with Sika® Separol® W
Environmentally friendly water based emulsion mold release agent leading to best surface appearance with Sika® Separol® W
Efficient production of exposed aggregate surfaces with SikaCem® Désactivant 4-6
Surface retardation applied on the form work with Sika® Rugasol®-3 W paste
Aesthetic colored protective coating against aggressive atmospheric influences with Sikagard®-550 W Elastic and Sikagard®-675 W ElastoColor
Transparent glaze for protection against weathering with Sikagard®--680 S Betoncolor
Improved concrete cohesion leading to fast and easy finishing with Sika® ViscoCrete®
Surface improving admixture with no side effect on other concrete parameters with Sika® D-Foam
3. Repair
Repair of Cracks
Repair of Broken Edges
Refurbishment of Honey Combs and Pore Filling
Repair of Structural Concrete Spallings
Refurbishment of small cracks (< 5 mm) with Sikadur® 52 Injection Normal and Parex Epoxy Injection Grout
Repair of large cracks (> 5 mm) with Sika MonoTop® (repair mortars) and Sikadur®-31+, Sikadur®-31+ Rapid and Sikadur®-33.
Repair of broken edges with Sika MonoTop® (repair mortars)
Achieve a fine texture with Sika MonoTop® (leveling mortars)
Epoxy-based repair mortar Sikadur®-41+
Repair with high aesthetic appearance (fine texture) with Sika MonoTop® (leveling mortars)
High-quality repair with no special aesthetic requirements with Sika MonoTop®-4012 (repair mortar) and Sika MonoTop® 3020 (pore sealer)
Safe structural concrete decays with a thickness layer up to 120 mm with Sika MonoTop®-4012 (repair mortar).
4. Bonding
Bonding of Concrete Elements
Bonding of Gasket
Bonding with Special Application
Concrete – Sikadur®-31+ range / Sikadur®-33
Steel – Sikadur®-31+ range / Sikadur®-30 / Sikadur®-33
Carbon fibre – Sikadur®-30
Wood – Sikadur®-31+ range
Fresh concrete to old concrete – Sikadur®-32
Bonding with transmission of high forces with Sikadur®-33 and Sikadur®-30.
Highly durable, easy to install bonding of rubber gasket in connecting sleeve with Sikaflex®
Bonding of concrete elements with drinking water contact with Sikadur®-31 DW (with drinking water approvals) and Sikadur®-31 DW Rapid
5. Anchoring
Installation of Anchors After Element Production
Early Loading
Solution where Mechanical Anchors Do Not Work
Special Applications / Substrates
Anchoring for non regulated applications with Sika AnchorFix®-1
Post fixing of anchors for regulated applications with Sika AnchorFix®-3030
Post fixing of anchors & rebars for regulated applications with Sika AnchorFix®-2+ and Sika AnchorFix®-3030
Anchoring with shorter pot life for early loading and cold ambient conditions with Sika AnchorFix®-1 and Sika AnchorFix®-2+
Use of bonded anchors instead of mechanical anchors: Sika AnchorFix® 3030
Use of high performance bonded anchors to reduce the embedded depth with the same load performance: Sika AnchorFix®-2+ and Sika AnchorFix® 3030
Application in cracked concrete & seismic zones:
Sika AnchorFix®-2+ and
Sika AnchorFix® 3030
Application in drinking water areas:
Sika AnchorFix®-2+
Application for a declared resistance to fire:
Sika AnchorFix® 3030
6. Grouting
Grouting of Post Tensioned Prestressing Tendons
Load Requirements
Temperature Requirements
Special Requirements
Filling of post-tensioning ducts with cementitious Parex Cable Grout
Grouting with subsequently early applied loads: Sikadur®-42 series and Parex Speedsure S Grout
Grouting of parts exposed to dynamic loads with Sikadur®-42 series and Parex Epoxy E Series
Grouting at ambient temperatures below + 5 °C with Sikadur®-12 Pronto
Grout resisting service temperatures above 60 °C with SikaGrout® 800
Grouting with a good bond strength to steel with Sikadur®-42 series
Grouting of parts exposed to chemicals with Sikadur®-42 series
7. Underground Construction
N.B. When designing a basement please refer to the British Standard BS8102:2022 for guidance. Please note underground modular construction for waterproofing is considered high risk according to the British Standard.
Pre-applied: Sheet membrane SikaProof® A is applied already in the factory before reinforcement and concrete. The benefit is an efficient process, especially on-site, where only the joints have to be sealed (less time consuming)
Post-applied: Adhered SikaProof® P, SikaBit® S sheet membranes are applied on-site when the elements are set
Post-applied: Liquid applied membrane Sikalastic® ia applied on-site when the elements are set
Internal joint sealing with Sika® Waterbar®, SikaSwell® or SikaFuko® (re-injectable hose)
External joint sealing with Sikadur Combiflex® SG
Admixtures to create a waterproofed concrete for the precast elements and for the in-situ core concrete with Sika® ViscoCrete®, Sika®-1, or SikaControl® WT
Joint Sealing is the key and essential to creating a watertight concrete system: Sika® Waterbar®, SikaSwell®, Sikadur-Combiflex® SG, and SikaFuko® (re-injectable hose)
Simple, fast and efficient injections of cracks, joints or voids with Sika®-Injection (foams and resins) based on various technologies
Precaution or repair injection in a specific joint by pre-applied (before concreting) re-injectable hose: SikaFuko®-System
8. Protection
Protection of Fair Faced Concrete Elements
Protection Systems Against Weathering
Protection System Against Chemicals
Concrete Curing
High-performance hydrophobic impregnation with Sikagard®-706 Thixo and Sikagard®-705 L
Elastic protection system suitable for crack-bridging with Sikagard®-545 W Elastofill and Sikagard®-550 W Elastic
Rigid protection system for slight mechanical loading: Sikagard®-675 W ElastoColor and Sikagard®-680 S BetonColor (clear)
Secured protection against high chemical attack with epoxy coatings Sikagard®-63 N and Sikagard®-62
Protection against medium attack for tubbing segments with Sikafloor®-155 WN, Sikafloor®-81 EpoCem® and Sikagard®-720 EpoCem®
Efficient concrete curing on which organic-based coating can be applied without
substrate preparation with Sikafloor® ProSeal W
Curing with high water retaining action (substrate preparation required) with Sika® Antisol®
9. Sealing
Sealing of Movement Joints
Sealing of Connection Joints
Sealing of Floor Joints
Sealing of Special Applications
Precast expansion joint sealants to accommodate even the most demanding of movement requirements: SikaHyflex®-250 Facade, Sikaflex® Construction+, and Everbuild Tecnic® Silicone 825.
±25% movement capability and good adhesion to many substrates with SikaHyflex®-250 Facade and Everbuild Tecnic® Silicone 825.
High mechanical resistance and meets EN 15651-4 requirements with Sikaflex® PRO-3 Purform®, Sikaflex® PRO 3 SL, Sikaflex®-415 Universal and Sikaflex®-406 KC.
High mechanical resistance and high chemical resistance with Sikaflex® PRO 3, Sikaflex® PRO 3 SL, Sikaflex®-403 Tank & Silo and Sikaflex® Tank N.
For application in marine environments, such as sea wall defences we reccomend Sikaflex®-423 PowerCure.
