On behalf of a client, a technical and application-oriented comparison was carried out between the UHPC products of WPE-DK and the established Ductal® UHPC material system. The objective of this report is to provide future users of Ultra-High Performance Concrete with a clear understanding of the main differences between an industrially standardized UHPC brand system and an adaptable UHPC binder and formulation technology.

Both material approaches belong to the UHPC material class and are designed to offer significantly higher performance than conventional concrete. However, their technical philosophy, processing strategy, flexibility and application potential differ considerably.

Ductal® UHPC: Established Industrial UHPC Brand System

Ductal® is an internationally known and industrially standardized UHPC brand material developed by Lafarge/Holcim. It has been used worldwide in architecture, façade construction, bridges, structural strengthening, bridge overlays, precast elements and shotcrete applications.

Depending on the specific formulation, Ductal® reports compressive strengths in the range of approximately 100 MPa to more than 200 MPa. Its high flexural and tensile performance is typically achieved through the addition of fibres, often steel fibres, and in some applications through special curing or heat treatment.

This makes Ductal® a strong reference product in the global UHPC market. Its main advantages are brand recognition, international project experience, standardized material technology and established use in architectural and infrastructure applications.

However, a standardized premium UHPC system may not always be the most flexible solution when local raw materials, regional climate conditions, local production, special applications or project-specific performance requirements are decisive factors.

WPE-DK UHPC: Adaptable Binder and Formulation Technology

WPE-DK UHPC is better understood as an application-specific UHPC binder and formulation system rather than only as a fixed ready-made product. WPE-DK materials can achieve compressive strengths of more than 240 MPa, to a large extent without the mandatory addition of steel fibres or heat treatment.

This is a significant technical difference. The high compressive strength of WPE-DK UHPC is primarily achieved through an optimized binder matrix, dense particle packing, low water demand and carefully controlled formulation technology. Fibres are not used as a compulsory component for achieving high matrix strength. Instead, fibre concepts can be selected according to the actual project requirements.

This allows WPE-DK to offer a more flexible technical platform. Steel fibres, hybrid fibres, basalt fibres, carbon fibres, polymer fibres or fibre-free systems can be used depending on whether the project requires higher flexural strength, crack control, impact resistance, fire resistance, corrosion reduction, clean architectural surfaces or specific durability properties.

Key Technical Difference: Standardized UHPC Product vs. Adaptable UHPC Platform

The main difference between Ductal® and WPE-DK is not only the compressive strength. Both systems can provide very high mechanical performance compared with conventional concrete.

The decisive difference is the material philosophy:

Ductal® represents an established, standardized, branded UHPC material system.

WPE-DK represents an adaptable UHPC binder and formulation platform that can be adjusted to local raw materials, local production methods and project-specific applications.

This distinction is particularly important for future UHPC users in regions where construction materials must perform under extreme environmental conditions, such as Saudi Arabia, the GCC region, Africa, coastal areas, industrial facilities, military infrastructure, tunnel projects and large-scale precast production.

Processing Advantage of WPE-DK UHPC

One of the most important practical advantages of WPE-DK UHPC is its simple and robust processing concept. For many WPE-DK UHPC binder systems, only three basic components are required:

• WPE-DK UHPC binder

• suitable aggregates, such as quartz sand or selected desert sand

• a small amount of water

The mixing ratio is designed to be simple and easy to understand:

1 part WPE-DK binder : 1 part aggregate

This consistent mixing principle is a major advantage for contractors, precast factories and local production partners, especially in countries where skilled UHPC experience may still be limited.

No additional admixtures or complex additive packages are normally required on site. This reduces the risk of incorrect dosing, simplifies quality control and makes the material easier to introduce into new markets.

The installation and application instructions are adapted to the specific project, including the intended application method, ambient temperature, mixing equipment, substrate condition, layer thickness, curing requirements and final performance target.

Relevance for Saudi Arabia and the GCC Region

For Saudi Arabia and the wider GCC region, UHPC must be evaluated under conditions that are very different from moderate European climates. Construction materials are exposed to extreme heat, low humidity, high evaporation rates, chloride attack, salt spray, sand abrasion, heavy traffic, marine environments and large-scale infrastructure demands.

In this context, WPE-DK offers several strategic advantages:

• adaptation to local sands and selected desert sand fractions

• potential for local UHPC production

• reduced dependence on imported ready-made systems

• simple binder-to-aggregate mixing concept

• project-specific formulation design

• suitability for hot climate applications

• use in infrastructure, marine, military, industrial and architectural projects

• possibility to produce UHPC components in local precast factories

• fibre-free or alternative fibre solutions where steel fibres are not preferred

• high compressive strength without mandatory heat treatment

This is especially relevant for Saudi Arabia, where large infrastructure investments, Vision 2030 projects, coastal developments, military construction, ports, airports, logistics areas, luxury architecture and precast concrete production all create strong demand for durable high-performance materials.

Application Comparison

Ductal® has a strong international position in architectural elements, façades, bridge components, overlays, strengthening systems, precast solutions and shotcrete applications.

WPE-DK can address these applications as well, but its technical advantage lies in a broader adaptable platform for special project requirements, including:

• façade panels and architectural UHPC elements

• Mashrabiya-inspired shading screens

• bridge overlays and strengthening layers

• tunnel linings and protective coatings

• marine and port infrastructure

• quay walls, jetties and splash-zone protection

• desalination plant components

• industrial wear protection

• military and critical infrastructure protection

• high-temperature UHPC systems

• precast concrete elements

• repair mortars and castable systems

• thin protective layers

• desert sand UHPC components

• luxury hotel and resort architecture

• floating and subsea UHPC structures

This wider adaptability makes WPE-DK particularly attractive where the client does not only need a premium UHPC product, but a complete technical solution adapted to the project environment.

Fibre Concept and Performance Philosophy

In many UHPC systems, steel fibres are used to improve flexural strength, tensile behaviour, crack control, ductility and post-cracking performance. This is technically valuable and often necessary for structural or impact-loaded components.

However, fibres are not the only way to achieve high compressive strength. WPE-DK demonstrates that very high matrix strength can be achieved through binder optimization and dense microstructure design. This allows the material designer to decide whether fibres are technically necessary for the specific application.

For many applications, especially architectural surfaces, dense protective layers, repair mortars, high-temperature systems or corrosion-sensitive environments, a fibre-free or non-steel-fibre solution may be advantageous.

For structural, dynamic, impact-resistant or highly loaded bending applications, fibres can still be added. The difference is that, with WPE-DK, fibres are treated as an application-specific design option rather than as a mandatory component for all UHPC products.

Strategic Advantage for Future UHPC Users

Future UHPC users should not only compare material strength values. They should compare the complete technical and practical system behind the material.

Important questions include:

• Can the UHPC be adapted to local raw materials?

• Can it be produced locally?

• Is the mixing process simple enough for local contractors?

• Are additional admixtures required on site?

• Can the formulation be adjusted to climate, application and performance requirements?

• Is fibre reinforcement mandatory or optional?

• Can the system be used for more than one application field?

• Is technical training and project-specific support available?

From this perspective, WPE-DK offers a strong advantage. It is not limited to a single standardized UHPC product. It provides a flexible UHPC binder technology that can be adapted to the actual needs of the user, the local market and the project environment.

Conclusion

Ductal® is an established and internationally recognized UHPC brand material with strong references in architecture, infrastructure and precast applications. It represents a proven industrial UHPC system with standardized performance and broad market recognition.

WPE-DK UHPC, however, offers a different and highly relevant value proposition. It is an adaptable UHPC binder and formulation platform designed for project-specific performance, local production, local sands, extreme climates and a wide range of demanding applications.

For future UHPC users, especially in Saudi Arabia, the GCC region, Africa, marine infrastructure, military infrastructure, tunnel construction and precast production, the practical advantages of WPE-DK are significant:

• high compressive strength of more than 240 MPa

• largely achievable without mandatory steel fibres

• no mandatory heat treatment for many systems

• simple mixing concept

• 1 part binder to 1 part aggregate

• no additional on-site additives normally required

• adaptation to quartz sand or selected desert sand

• project-specific installation instructions

• local production potential

• broad application flexibility

For these reasons, WPE-DK UHPC should not be viewed simply as another UHPC material. It should be understood as a flexible high-performance concrete technology platform for modern construction, infrastructure, marine, defence, industrial and architectural applications.

WPE-DK UHPC combines high matrix performance, simple processing and local adaptability — three decisive factors for the next generation of UHPC users.