ART-ZXF
Concrete Crack Microbial Repair Agent

ART-ZXF is a concrete-crack repair agent jointly developed by the Green Construction Materials & Carbon Utilization Research Center of Southeast University and Jiangsu ARIT New Materials Co., Ltd. Relying on the metabolic activity of embedded microorganisms, it automatically senses fine cracks and initiates timely self-repair, mimicking a biological response. The material can also re-heal if cracking recurs, effectively solving problems of leakage, ion transport, durability loss and visual defects.

 Products

Features of ART-ZXF

Automatically detects cracks and promptly repairs micro-cracks

Capable of secondary repair with high healing efficiency

Environmentally friendly, highly compatible with concrete, and easy to apply

Specification of ART-ZXF

Items	Performance
Appearance	Brownish-gray spherical particles
Soluble Ca2+ content(mg/g)	2 900~6 900/100
Water absorption(%)	≤3.0
Alkali content(%)	≤0.5
Apparent density(kg/m3)	1900~2100
Chloride-ion content（%)	≤0.06
Single-particle crushing load(N)	≥70
Sulfate-ion content(%)	≤7 2

Application Case

Metro station

At a station on Nanjing Metro Line S6, ART-ZXF microbial crack-repair agent was added to the side-wall mix. Cracks 0.5 mm wide were sealed and water leakage stopped.

Ship lock

In the lock chamber of a Yangzhou waterway, ART-ZXF was applied at the joint between base slab and side wall. Fresh cracks were promptly and effectively healed.

Basement wall

Basement side walls at Xiamen Jimei New Town were treated with ART-ZXF, giving good repair of wall cracks.

Underground structure

At a Jiangbei New Area site in Nanjing, ART-ZXF was used on side walls for both crack repair and prevention. Average crack spacing fell 60 %, length 65%, and count 55%. Post-repair ultrasonic velocity exceeded 3km/s , showing a clear gain in structural integrity.

Usage Instructions

Dosage: Adjust to project needs; typical dosage is 20–25 kg/m3 concrete.
First-heal capacity After initial cracking:

Crack-area healing ≥ 95 %

Water-penetration recovery ≥ 95 %

Chloride-penetration recovery ≥ 90 % Ultrasonic wave speed ≥ 3.0 km/s

Average healing depth ≥ 25 mm

Second-heal capacity After re-cracking:

Crack-area healing ≥ 80 %

Water-penetration recovery ≥ 80 %

Chloride-penetration recovery ≥ 80 % Ultrasonic wave speed ≥ 2.5 km/s

Average healing depth ≥ 25 mm

Viable cell count

≥ 2.5 × 10⁸ CFU/g (GB food-microbiology plate-count method)

Alkali resistance (90-day survival ratio)

≥ 95 % (industry code for microbial self-healing concrete)

Complies with the Following Standards

T/CECS 973-2021 “ Technical specification for application of microbial based self-healing concrete ”

Packaging

25kg bag or 50kg bag for customer demand

Storage

It should be stored in a cool and dry place, avoiding direct sunlight, and kept in a dedicated warehouse or a fixed location.
The effective storage period is 24 months. It can still be used after being tested and verified to be qualified if it exceeds the time limit.

Precautions

Control vibration time: vibrate only long enough to fully compact the mix and prevent the immobilized microbial repair particles from floating; when full compaction is achieved, vibration may be shortened.
During crack-healing curing, use covers, light misting or fogging; do NOT use membrane, spray-on or brush-on curing compounds that seal the surface and cut off air.
For winter work, maintain the concrete surface at 10 °C–40 °C (insulation, heating mats, etc.) to keep microbial mineralization active and ensure effective crack repair.

Legal Notes

Retaining or disclosing product samples without the company's explicit permission is strictly prohibited.
In addition to the product quality itself, the actual performance also depends on other uncontrollable factors. If there are uncontrollable factors, company cannot guarantee the performance of the product.
Users are requested to strictly follow the technical guidance and product instructions for use. The company shall not be liable for any consequences resulting from unauthorized changes to the product usage method without the company's authorization.