ART-XFJ is a concrete crack repair agent jointly developed by the Research Center for Green Building Materials and Carbon Fixation Utilization of Southeast University and Jiangsu ARIT New Materials Co., Ltd. It utilizes the life activities of microorganisms to achieve a bionic function that can automatically sense and actively and promptly repair micro-cracks. Additionally, it offers secondary repair effects for repeated cracking, effectively addressing issues such as water leakage, ion transport, durability assurance, and aesthetics.
| Items | Performance |
| Appearance | Brownish-gray spherical particles |
| Soluble Calcium Ion Content | 2900–6900 mg/100g |
| Water Absorption Rate | ≤3.0% |
| Apparent Density | 1900–2100 kg/m³ |
| Particle Outer Diameter | 2.36–4.75 mm |
| Single Particle Compressive Crushing Strength | ≥70 |
| Chloride Ion Content | ≤0.06% |
| Sulfate Ion Content | ≤7.2% |
| Alkali Content | ≤0.5% |
Adjust the dosage of the microbial repair agent for concrete cracks reasonably according to the actual engineering requirements. Under normal circumstances, 20–25 kg is added per cubic meter of concrete.
Primary Repair Capability
Concrete mixed with the microbial repair agent for concrete cracks achieves a crack area repair rate of over 95% after the first cracking, a water penetration resistance repair rate of over 95%, a chloride ion penetration resistance repair rate of over 90%, an ultrasonic wave propagation speed of over 3.0 km/s after crack repair, and an average crack repair depth greater than 25 mm.
Secondary Repair Capability
After the second cracking, the crack area repair rate is over 80%, the water penetration resistance repair rate is over 80%, the chloride ion penetration resistance repair rate is over 80%, the ultrasonic wave propagation speed is over 2.5 km/s after crack repair, and the average crack repair depth is greater than 25 mm.
Effective Viable Bacteria Count
Tested according to the national standard “Food Safety National Standard—Microbiological Examination of Food: Determination of Total Viable Count,” the effective viable bacteria count of this product is above 2.5×10⁸ CFU/g.
Bacterial Alkali Resistance (Ratio of Viable Bacteria Count after 90 Days)
Tested according to the industry standard “Technical Regulations for the Application of Microbial Self-Healing Concrete,” the alkali resistance of bacteria in the microbial repair agent for concrete cracks is above 95%.
Microbial repair agents can be used for various types of concrete structures and are especially suitable for places where micro-cracks are prone to occur, where high crack control requirements exist, where manual repair is difficult, where repair construction space is limited, and where cracks are not easily detected in a timely manner. Recommended application fields:
Underground waterproof concrete structures
Hydraulic concrete structures
Marine concrete structures
Exterior walls of various industrial and residential buildings
Road and bridge concrete
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