About us
DYWIDAG Concrete Technologies is a business unit of the DYWIDAG Group that focuses primarily on the production of reinforced concrete solutions for commercial, industrial and residential construction, civil engineering and energy.
The main European product brands belonging to DYWIDAG Concrete Technologies are:
We are Europe’s largest producer and distributor of reinforced concrete technologies products, manufacturing our products in Germany and Poland
Collaborating with specialist partners across Europe, our extensive network ensures easy access to our wide variety of concrete solutions for industrial, commercial, and residential construction projects.
Operating from multiple countries, including Germany, Poland, Scandinavia, France, and the United Kingdom, we're proud of our extensive reach and comprehensive product range.
What makes DYWIDAG Concrete Technologies special?
What makes DYWIDAG Concrete Technologies special?
QUALITY and SAFETY ORIENTATION: We manufacture our solutions in accordance with the requirements of EC 2 and ITB. RECOSTAL solutions have technical approvals: DIBt and CARES. The RECOSTAL® Starter Pack complies with DIN EN 1992-1-1/NA and meets the requirements set out in the DBV Bulletin. CONTEC® products have the German abP test certificate. DYWIDAG Form ties are manufactured in accordance with DIN 18.216 as well as the relevant recommendations of the building authority.
CLIENT ORIENTATION: Our clients are from all over Europe. We provide support when planning technical solutions. For our clients, we provide a free formwork design for foundations or foundation footings, as well as an assembly design with a diagram using our solutions.
We try to approach each project individually, adapting products to the client's project. At the customer's request, we produce solutions in any size according to the design.
Our core strength is the ability to adapt and customise our products to your project and support you in technical planning.
YEARS of EXPERIENCE: We started the production of permanent formwork and reinforcement in Germany in 1980, when a significant part of the products and systems currently used in reinforced concrete construction were completely unknown in the 1980s. Since our founding, we have played a significant role in the development of innovative specialty products - both for german market and many international markets. CONTEC® and RECOSTAL® system solutions are continuously developed to offer optimal solutions to constantly changing problems on the construction site. DYWIDAG Concrete Technologies is one of the business units of the DYWIDAG Group with history dates back to 1865, when Dyckerhoff and Widmann AG (DYWIDAG) founded a small concrete construction company.
PRODUCTION in EUROPE: We create our RECOSTAL® and CONTEC® system solutions in two production plants: Köthen in Germany and Gajków in Poland.
DYWIDAG Vision
DYWIDAG Vision
We strive to be the leading global supplier of post-tensioning and stay cable systems, geotechnical products and concrete technologies to the infrastructure and construction industries.
We aspire to be the best at what we do.
DYWIDAG Mission
We make infrastructure safer, stronger, and smarter
DYWIDAG Mission
We make infrastructure safer, stronger, and smarter
DYWIDAG History
Business Unit of DYWIDAG - DY.CO rebrands as DYWIDAG Concrete Technologies. Partec System company changes name into DYWIDAG Concrete Technologies.
New Business Unit of DYWIDAG – DY.CO with reinforced concrete accessories. Contec Bausysteme and PARTEC System become an integral part of new BU.
DYWIDAG acquires Polish company PARTEC System.
PARTEC System is established in Poland, which specializes in permanent formwork systems.
Private equity investor Triton becomes the new shareholder of DYWIDAG.
DYWIDAG enters the European concrete accessories market by making acquisitions in France and Germany: Arteon, Technique Beton, Mandelli-Setra, Contec Bausysteme.
Contec Bausysteme GmbH was established and started the production of lost formwork and reinforcement technologies in Germany.
DYWIDAG begins international expansion and invests in the R&D department and the second global segment: geotechnics.
DYWIDAG starts license business for construction systems with bridge post-tensioning at its core.
DYWIDAG is main contructor of the Centennial Hall in Wrocław, which is now a milestone in the history of reinforced concrete architecture and listed as a UNESCO Word Heritage Site.
Dyckerhoff & Widmann AG (DYWIDAG) founded a small concrete constrution company.
Eurocode 2 standards
CONTACT AREA - EUROCODE 2
Contact surfaces between concretes placed in different stages according to EUROCODE 2 (EN 1992-1-1), according to Polish standards of EUROCODE 2 (PN-EN 1992-1-1).
KEYPROFILED ACCRODING TO EC2
surfaces with indentations according EC2 shown in the diagram below.
ROUGH:
surfaces having a min. 3mm of roughness with spacing approx. 40mm, obtained by raking, uncovering aggregate or produced by similar methods with similar effects.
SMOOTH:
obtained in sliding forms or by pressing, free surfaces without further treatment after vibration.
VERY SMOOTH:
used in steel forms, forms made of plastics or specially prepared.
Geometry of key profiled joints according to EC 2: RECOSTAL® Starter Packs meet the EC 2 requirements for the highest category “key profiled“.
TYPE OF SURFACE | Μ | C |
|---|---|---|
Very smooth | 0.5 | 0.025 ÷ 0.010 |
Smooth | 0.6 | 0.20 |
Rough | 0.7 | 0.40 |
With indentations | 0.9 | 0.50 |
μ - coefficient depends on roughness of contact area
c - friction coefficient during abrasion
LOAD CAPACITY IN CONTACT
EUROKOD 2 ( PN-EN 1992-1-1)
VRdi = c * fctd + μ * σn + ρ * fyd ( μ * sin α + cos α)
c - coefficient depends on roughness of contact area
μ - friction coefficient during shear
σn - stress perpendicular to contact area (σn = 0)
α - angle between the contact area and stapling reinforcement (450 < α < 900)
fctd - designed tensile strength of concrete
fyd - reinforcement design tensile strength
ρ = AsAi
ρ - stapling reinforcement ratio
As - cross-sectional area of reinforcement in contact area
Ai - surface area of the contact area
CALCULATION EXAMPLE
Concrete: C25/30 > fctd = 1.33 Mpa Reinforcement ratio 3% > ρ = 0.03
Very smooth contact
VRdi= 0.20*1.33 Mpa+0.03*420Mpa*(0.5*sin900+cos 900) = 6.33 MPa
Stepped joint
VRdi = 0.50 *1.33 Mpa+0.03*420Mpa*(0.9*sin900+cos 900) = 12.0 MPa
COMPARISON OF LOAD CAPACITY: Key profile transfers bigger load.
KEY PROFILES
Key profile meets all requirements for Eurocode 2 and PN - EN 22768 - 1:1993
Approvals and certificates
CE mark
ITB Technical Approval
Certificate Quality Management System of the following standard ISO 9001:2015
Certificate of compliance and test report for B500B reinforcing bars in coils, compatibility with doc. References – Allgemeine bauaufsichtliche Zulassung DIBt TWR Z-1.2-260: 2018-03-15
The CARES technical approval
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Technical orientation
From initial planning through to construction, we support you, including provision of full layout and installation drawings.
APPROVALS AND CERTIFICATES:
| SYMBOL | APPROVAL / CERTIFICATE NAME | DOWNLOAD | PRODUCT WITH APPROVAL / CERTIFICATE |
|---|---|---|---|
| TECHNICAL APPROVAL ITB AT-15-6287/2015 |  | Anchor channels RECOSTAL® RSH |
 | NATIONAL CONFORMITY CERTIFICATE NO. 020-UWB-0653/Z | | |
| CARES Technical Approval Report TA2 5075 | | |
| Übereinstimmungszertifikat Nr. ÜZ 1.0/20-384-1 (Certificate of Compliance no. ÜZ 1.0/20-384-1) | | |
| TECHNICAL APPROVAL ITB AT-15-6259/2016 | ||
| TECHNICAL APPROVAL ITB AT-15-9695/2016 | | Sealing elements contaflex |
| TECHNICAL APPROVAL ITB AT-15-8018/2016 | | |
| Notified laboratory TU Braunschweig, nr 0761 | | |
| ISO 9001:2015 IQNET Certification | | |
| ISO DQS 9001:2015 Certification | |
DYWIDAG Concrete Technologies Sp. z o.o.
Swobodna 6, Gajków 55-002 Kamieniec Wrocławski, Poland
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