Ultrafine cement
Applications include grouting in underground mining operations in complex geological settings, drilling and production well cementing for oil and gas wells to prevent leaks, reinforcement and strengthening of hydraulic and hydroelectric dam structures, waterproofing and leak-stopping in metro systems and tunnels, repair and waterproofing of concrete cracks and delaminations in buildings, restoration of historic structures, seepage control in the surrounding rock of nuclear power plants, treatment of tailings and solid waste, preparation of ultra-high-strength concrete, and reinforcement of soft soil foundations, among other engineering applications.
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Keywords： Ultrafine cement
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Product Overview
Kangjing New Materials Research and Development Co., Ltd. manufactures and markets the “Panlongshan” brand ultra-fine cement, an innovative ultrafine inorganic mineral grouting material produced through physical crushing, grinding, shaping, classification, and sorting. The particle size is precisely controlled within the range of 1–10 μm, with the finest particles capable of reaching below 1 μm.
The product combines high permeability, volumetric stability, and strong consolidation capability, enabling it to penetrate microcracks and fine-grained formations to achieve integrated grouting, leak sealing, and structural reinforcement. Compared with conventional materials, it offers superior permeability, enhanced durability, and greater engineering reliability.
It has been widely applied in underground mining grouting in complex geological settings, drilling and oil-production well plugging to prevent leaks, reinforcement and strengthening of hydraulic and hydroelectric dam structures, waterproofing and leak-stopping in subway and tunnel construction, repair and waterproofing of concrete cracks and delamination in buildings, restoration of historic structures, seepage control in the surrounding rock of nuclear power plants, treatment of tailings and solid waste, preparation of ultra-high-strength concrete, and soft-ground improvement projects.
Core Advantages
1. Deep Penetration Capability
Can penetrate microfractures ranging from 1 to 10 μm and silty clay formations, achieving deep, dense filling.
2. High-Strength Consolidation
3-day strength ≥ 42 MPa; 28-day strength up to over 87 MPa.
3. Long-lasting durability
No aging issues, long-term stability, and prevention of secondary leakage.
4. Safe and Pollution-Free
Made of inorganic materials; non-toxic and pollution-free.
5. Construction-friendly
Compatible with various grouting equipment and maintains excellent performance even at high water-to-cement ratios.
Main Parameters
Parameters | Model | |||||||
K700 (800 mesh) | K1000 (1000 mesh) | K1300 (1340 mesh) | K2000 (2000 mesh) | |||||
Requirements | Measured value | Requirements | Measured value | Requirements | Measured value | Requirements | Measured value | |
Particle size D50 (µm) | ≤8 | 5.67 | ≤6 | 5.17 | ≤5 | 4.31 | ≤3 | 2.16 |
Particle size D90 (µm) | ≤20 | 17.83 | ≤13 | 12.57 | ≤10 | 9.77 | ≤6.5 | 6.39 |
Initial setting time (min) | ≥30 | 181 | ≥30 | 149 | ≥30 | 129 | ≥30 | 45 |
Final setting time (min) | ≤600 | 233 | ≤600 | 211 | ≤600 | 195 | ≤600 | 89 |
3-day compressive strength, MPa | ≥23 | 42.6 | ≥40 | 50.3 | ≥23 | 52.3 | ≥50 | 59.3 |
3-day flexural strength, MPa | ≥4 | 7.1 | ≥5.5 | 7.2 | ≥4 | 7.7 | ≥6.0 | 8.3 |
28-day compressive strength, MPa | ≥52.5 | 77.8 | ≥62.5 | 72.6 | ≥52.5 | 79.6 | ≥75 | 87.9 |
28-day flexural strength, MPa | ≥7 | 9.5 | ≥8 | 8.9 | ≥7 | 9.6 | ≥9 | 10.2 |
Packaging Specifications | 25 kg/bag or 1000 kg/bag | 15 kg/bag or 500 kg/bag | ||||||
Test Standards | The data verification method shall comply with Q/KJ 0001 or GB/T 35161. | |||||||
Friendly reminder: This table is not the sole basis for compliance; the factory inspection data for each production batch shall prevail.
Application Fields
● Reinforcement and seepage-control engineering for mine shafts and roadway surrounding rock;
● Grouting and sealing works for groundwater control in underground mining operations;
● Foundation reinforcement and seepage-control works for reservoir dams, as well as seepage-prevention and leak-stopping treatments for bedrock fractures and fissures around the reservoir;
● Applications in geotechnical drilling, including borehole wall stabilization, leak plugging, and borehole sealing;
● Leak prevention and repair for oil wells and geothermal wells;
● Subway and tunnel surrounding rock reinforcement and water-stopping works;
● Foundation reinforcement and grouting remediation of defects such as cracks in structures including buildings, highways, and bridges;
● Concrete matrix for large-scale electromagnetic and neutron shielding.
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Kang Jing's Official Account
Kang Jing WeChat Customer Service
Northwest Center: Shaanxi, Xi'an, Weiyang, Room 2002, Rongmin Group
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WhatsApp：8618809236578
Ms. Jin：+86 18165358316
International email：expor@kangjinggrouting.com
Domestic email：kjgf@crystalnew.cn