Cemex
Promptis Rapid Hardening Concrete
Promptis is an innovative, rapid-hardening concrete solution from Cemex that saves valuable time during construction. In today’s demanding and competitive environment, where tight deadlines and margins are the norm, speed and efficiency are crucial.
Promptis helps save valuable hours, making it an essential solution for fast-paced projects.
Design for Time-Critical Construction
Promptis transforms how projects are planned and delivered, enabling engineers to design around tighter timelines without compromising performance.
- Accelerated construction sequencing
- Reduced downtime for roads, rail, and facilities
- Faster precast production cycles
- Efficient delivery in constrained or live environments
DISCOVER PROMPTIS
Applications
Promptis is suited to a wide range of time-sensitive applications:
- Fast demoulding of columns, walls, beams, slabs
- Infrastructure works: Roads, railways, tunnels, airport pavements
- Precast manufacturing: Faster mould turnover cycles
- Renovation & repair: Rapid return-to-service projects
WHAT ARE THE
Benefits
Rapid Hardening concrete has a number of benefits including:
- Fast Formwork: Enables formwork removal within 6 hours, boosting productivity (subject to mix design).
- Rapid Construction: Quick & hassle-free pouring process.
- Reduces Costs & Delays: Lowers labor & equipment rental costs, eliminating on-site delays.
More About Promptis
How does Promptis Work?
Promptis is a rapid hardening concrete designed to achieve high early strength while maintaining normal workability during placement. Using a carefully engineered combination of admixtures, Promptis accelerates strength development immediately after placement, allowing structural elements to reach usable performance within hours rather than days. Unlike traditional accelerated concretes, Promptis maintains flow and workability for up to 120 minutes, enabling standard placing methods without compromising speed.
Time-Critical Construction
Promptis is engineered for projects where time is the critical constraint - this enables faster project completion, reduced downtime, and improved programme certainty.
- Early strength in as little as 4 hours
- Formwork removal possible in ~6 hours
- Full structural strength (≈40 MPa) achievable within 24 hours
- Traffic or operational reopening significantly accelerated
Performance Characteristics
Promptis delivers both speed and reliability without compromising long-term structural performance.
- High early strength: Rapid strength gain within hours
- Compressive strength: Up to ~40 N/mm² in 24 hours
- High strength range: 30 MPa to 150 MPa at 28 days
- Workability retention: Up to 90–120 minutes
- Consistent performance: Works across a wide range of cement types
Construction Advantages
Promptis improve sites productivity and reduces labour and equipment requirements.
- Fast formwork removal: Enables rapid cycling of construction elements
- Pumpable & easy placement: Similar to conventional concrete
- Accelerated construction programmes: Reduces project duration
- Cold weather performance: Reliable performance at low temperatures
More Specialist Concretes
That Work With The Cemex BIM Studio
Resilia
A high-performance fiber-reinforced concrete designed for strength, durability, and design flexibility. Enables slimmer elements, reduced steel reinforcement, and long-lasting structural performance.
Pervia
A high-performance permeable concrete designed for effective stormwater management, enabling rapid water infiltration while maintaining durable, hard-wearing surfaces. Ideal for SuDS-compliant and sustainable infrastructure.
Insularis
A high-performance insulating concrete designed to improve thermal and acoustic performance in buildings. Reduces thermal bridging, enhances energy efficiency, and supports more comfortable, durable structures.