Fiber-Reinforced Concrete Repair Mortar with Self-Healing Properties
ECOPAIR 303 concrete repair mortar is an advanced, one-component, fiber-reinforced repair mortar that leverages innovative self-healing technology. It's designed for repairing and rehabilitating concrete structures where there's a need for rapid setting, excellent early and ultimate strength, and maximum durability against destructive environmental factors. This product not only repairs existing defects but also, through the activation of internal biological or chemical mechanisms, can automatically heal new micro-cracks that form during the structure's service life, significantly extending its lifespan and stability.
ECOPAIR 303 comes as a pre-mixed compound. By simply adding a specified amount of water, it becomes a workable and ready-to-use mortar. This feature makes it an ideal choice for emergency and rapid repairs in critical infrastructure such as floor slabs, roads, high-traffic industrial areas, and marine structures.
Product Features & Technical Structure
ECOPAIR 303 is a polymer- and fiber-modified cement-based mortar specifically engineered for durable, rapid repair applications. Its standout feature is its ability to automatically repair micro-cracks that can arise from shrinkage, thermal loads, or mechanical stress. This self-healing capability is achieved by incorporating special agents (such as calcium carbonate-producing bacteria or encapsulated polymers) into the mortar matrix. These agents are activated by the presence of water and air, producing mineral or polymeric substances that fill and seal the cracks.
Key Features of ECOPAIR 303:
Rapid Setting: An initial setting time of approximately 40 minutes allows for quick return to service, which is critical for high-traffic areas and tight project schedules.
High Compressive Strength: Achieving very high early and ultimate compressive strengths ensures strong structural performance and long-term durability.
Excellent Adhesion: Creates a strong and durable bond with various concrete substrates and existing building materials, preventing delamination and flaking.
Superior Freeze-Thaw & De-icing Salt Resistance: Stability against repeated freeze-thaw cycles and the damaging effects of de-icing salts makes it ideal for cold climates and roadways.
Pre-mixed Formulation: Requires only the addition of water, ensuring ease of use, reducing human error, and guaranteeing consistent mixing quality on-site.
Minimal Traffic/Operation Delay: Due to its rapid setting, it allows for opening traffic lanes and resuming operations in the shortest possible time.
Self-Healing Property: Its unique ability to automatically heal micro-cracks significantly increases the structure's lifespan and reduces the need for future repairs.
Fiber Reinforced: The presence of fibers in the mortar matrix improves tensile, flexural, and crack resistance.
Specialized Applications
Due to its unique properties, ECOPAIR 303 is suitable for a wide range of concrete repair and maintenance projects:
Roads & Floor Slabs: Ideal for rapid repairs on highways, airports, streets, and parking lots that require quick reopening.
Factory & Workshop Floors: Repairing damaged concrete floors in industrial settings subjected to heavy loads, abrasion, and chemical exposure.
Marine Structures: Excellent resistance to saltwater, chloride ions, and wet-dry cycles makes it suitable for jetties, breakwaters, and coastal structures.
Manhole and Street Furniture Installation: Used for the rapid installation and stabilization of manholes, covers, and hydrants in streets.
Mounting Posts, Railings, & Concrete Structures: Serves as a grouting or setting mortar for quick stabilization of precast or attached elements.
How to Apply ECOPAIR 303
Proper application is essential to achieve maximum performance and durability.
1. Concrete Surface Preparation
Cleaning: The concrete surface must be completely clean and free of dust, oil, grease, paint, loose layers, efflorescence, or any other contaminants.
Preparation Methods: Use mechanical methods like chipping, sandblasting, grit blasting, high-pressure water jetting, or grinding to create a rough, textured surface with a minimum tensile surface strength of 1.5 MPa.
Defining Boundaries: The repair area should have a minimum thickness of 20 mm. Boundaries must be defined with clean, perpendicular cuts (using a concrete saw) to prevent thin, weak edges.
Rebar Preparation (if present): Exposed rebar must be thoroughly cleaned of rust, grease, and loose concrete. Use a wire brush, sandblasting, or other mechanical tools to achieve a cleanliness level of Sa 2.5 (according to ISO 8501-1). If needed, a suitable anti-corrosion primer can be used.
Pre-Wetting: The concrete surface must be fully saturated with clean water (at least 24 hours before application). This prevents the concrete from absorbing water from the mortar mix, ensuring optimal adhesion and proper curing. Before applying the mortar, remove any excess standing water to achieve a Saturated Surface Dry (SSD) condition.
2. Bonding Layer
For critical repairs or to maximize adhesion, a bonding agent can be used. This layer can be a cement-polymer slurry or an epoxy primer. The repair mortar must be applied while the bonding layer is still "wet-on-wet."
3. Mixing ECOPAIR 303
Mixing Ratio: Mix the contents of one 25 kg bag of ECOPAIR 303 with 3 to 4 liters of clean water (at approximately 20-25 °C). The water-to-powder ratio is crucial for achieving optimal properties.
Mixing Tool: Use a low-speed drill mixer with an appropriate paddle.
Mixing Time: Mix for a minimum of 1.5 to 3 minutes until a uniform, lump-free, and homogeneous mortar is achieved.
Warning: Adding too much water will severely reduce the mortar's strength, adhesion, and durability.
4. Application and Finishing
Pot Life: Due to its rapid setting, the mortar must be applied immediately after mixing and within its pot life, which is approximately 35 minutes.
Application Method: Apply the mortar to the prepared surface using a steel trowel or wooden float.
Compaction: For small areas, manual compaction with a trowel is recommended. For larger areas, small vibrators or other mechanical methods can be used to ensure full compaction and eliminate air bubbles.
Finishing: Use a wooden float or sponge trowel to achieve a uniform, non-slip surface.
Sectioning: For large areas, working in 1 to 1.5-meter sections can help with better control over the application, compaction, and final surface uniformity.
5. Curing and Care
Proper curing is critical for achieving high early strength and durability.
Methods: Immediately after the initial set, the repaired surface must be kept moist for at least 3 to 7 days. This can be done by covering it with plastic sheets, continuous misting with water, or using curing compounds.
Importance: Proper curing prevents rapid water evaporation, reduces plastic shrinkage, and helps the mortar achieve maximum strength and durability.
Technical Specifications
| Property | Value | Relevant Standard |
| Color | Gray | - |
| Hardened Density | 2350 kg/m³ | ASTM C642, EN 12390-7 |
| Initial Setting Time | 40 minutes (at ambient temp) | ASTM C191, EN 196-3 |
| 28-Day Compressive Strength | 53 N/mm² (53 MPa) | EN 1504-3 (R4), ASTM C109 |
| 28-Day Flexural Strength | 8 N/mm² (8 MPa) | ASTM C348, EN 12390-5 |
| Application Temperature | 0°C to 40°C | - |
| Average Water Requirement | ~20% (by weight) | ASTM C187, EN 1015-2 |
| Pot Life | 35 minutes | - |
The Self-Healing Mechanism of ECOPAIR 303
The self-healing mechanism in ECOPAIR 303 is a key innovation that automatically repairs micro-cracks in concrete, significantly extending the structure's lifespan. This process typically relies on one or a combination of two main mechanisms:
1. Biotic Self-Healing
When micro-cracks form, water and oxygen penetrate the mortar. ECOPAIR 303 contains microscopic capsules or spores of specific bacteria (typically Bacillus) that are dormant in dry conditions. As water and oxygen enter the cracks, these bacteria are activated and begin to metabolize. They feed on compounds in the mortar and, through a biological process, produce carbonate ions. These ions react with calcium ions in the concrete to form insoluble calcium carbonate (CaCO₃) deposits. These deposits gradually fill and seal the cracks, preventing further water and corrosive agents from penetrating the concrete, protecting the rebar from corrosion, and preventing further deterioration.
2. Chemical/Polymer Self-Healing
Some self-healing systems use microcapsules containing healing agents such as specific polymers, silicates, or active cementitious compounds. When a crack forms, these capsules rupture, releasing the healing agents. The released materials react with moisture or other substances in the crack, expanding or creating a bonding substance that fills and seals the crack.
ECOPAIR 303 leverages these mechanisms to provide a sustainable and preventative solution for increasing the durability of concrete structures, reducing the need for costly and time-consuming future repairs.
Packaging and Storage
Packaging: ECOPAIR 303 is supplied in 25 kg waterproof bags.
Shelf Life: In original, unopened packaging, the product can be stored for up to one year in a cool, dry place (5°C to 35°C), away from direct sunlight and high humidity. Freezing or excessive moisture can damage the product's properties.
Safety Precautions
Skin and Eye Contact: ECOPAIR 303 contains cement, which can cause skin and eye irritation. In case of contact, rinse immediately with plenty of water. If irritation persists, seek medical attention.
Inhalation: Avoid inhaling the powder dust. Use a suitable respiratory mask (such as N95 or FFP2) when mixing and applying the product.
Personal Protective Equipment (PPE): When working with the product, it is mandatory to use chemical-resistant gloves, safety glasses, and appropriate work attire.
Ventilation: Ensure proper ventilation in enclosed spaces.
Keep Out of Reach: Keep the product out of reach of children.
ECOPAIR 303, with its combination of rapid setting, high strength, and, most importantly, self-healing properties, offers an innovative and comprehensive solution to the challenges of concrete repair and maintenance. It not only quickly fixes defects but also, by activating internal mechanisms, prevents future crack propagation, significantly increasing the service life and stability of concrete structures. Strict adherence to application guidelines and relevant standards is essential to fully realize the potential of this advanced mortar.
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