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Ordinary Portland Cement – Black Portland Cement
Main business：Building, infrastructure, industrial, mining, marine engineering, military engineering, expressway, tunnel, bridge, concrete repair, installation of large-scale mechanical equipment, wind power equipment, foundation bolt fixing, etc. High-performance, early-strength, micro-expansion, self-compacting, large-flow leveling, rapid repair cement grouting material
- Commodity name： Ordinary Portland Cement – Black Portland Cement
- Description
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1. Packaging and Logistics Delivery Date Guarantee
Packaging Three-ply film-composite bag Specifications 25KG/ bag Volume 60*40*15 cm³ Minimum order quantity 1000KG Minimum order quantity Delivery date 1-7 Workday Shelf life Dry and well-ventilated 180 days Transaction method FOB/EXW Payment method Telegraphic Transfer / Letter of Credit Ship goods FOB Shanghai / Ningbo 2. Product Description
Ordinary Portland Cement (OPC) is a high-performance, hydraulically setting cementitious material produced by precisely blending high-quality raw materials such as limestone, clay, and iron ore. After calcining these raw materials into clinker, a suitable amount of gypsum is added and the mixture is finely ground to produce the final product. The product complies with the international standards ASTM C150 and EN 197-1, exhibiting stable chemical properties and reliable mechanical performance, making it suitable for a wide range of construction environments. Currently, we offer four core grades—PC32.5, PO42.5, PII52.5, and PW62.5—that meet the strength and workability requirements of various construction applications, thereby laying a solid foundation for safe, durable, cost-effective, and efficient construction projects worldwide.
3. Technical Indicators
Manufacturing Unit: Wuxi Jianghuai Building Materials Technology Co., Ltd. Model: P042.5/50KG/bag Production date: April 15, 2024 Batch number: JH-20240415-5000T Serial number Testing items Unit Standard requirements Measured value Conclusion Testing basis 1 Residue on 80μm sieve % ≤10.0 1.2 Compliant GB/T1345-2005/7 2 Standard consistency water requirement % / 28.6 / GB/T1346-2011/7 3 Setting time Initial setting min ≥45 195 Compliant GB/T1346-2011/8 Final setting min ≤600 255 Compliant GB/T1346-2011/8 4 Stability (Test Cake Method) / Qualified Qualified Compliant GB/T1346-2011/1 5 Sulfur trioxide % ≤2.5 2.3 Compliant GB/T176-2017/6.5 6 Sulfate resistance % ≤0.06 0.05 Compliant GB/T749 7 Magnesium oxide / ≤5.0 2.79 Compliant GB/T176GB/T750 8 Flexural strength 3 days MPa ≥3.0 4.9 Compliant GB/T17671-1999 28 days MPa ≥6.5 8.2 Compliant GB/T17671-1999 9 Compressive strength 3 days MPa ≥17.0 25.4 Compliant GB/T17671-1999 28 days MPa ≥42.5 49.3 Compliant GB/T17671-1999 Note: Testing basis: GB/T175-2007 "Ordinary Portland Cement"
Our company complies with GB/T19001-2016/ISO 9001:2015 through its quality management system.
The data in this report are authentic; the production date has been postponed!4. Core Product Features
High strength and durability: The hydration products have a dense structure, offering excellent resistance to weathering, corrosion, and freeze-thaw cycles, ensuring a long service life.
Good workability: easy to mix, easy to pump, and easy to finish; even with complex structural designs, construction can still proceed smoothly.
Coagulation stability: No early or delayed coagulation occurs, making it suitable for various construction rhythms and climatic conditions.
Green and environmentally friendly: Utilizes low-carbon production processes that meet global environmental standards (such as LEED certification requirements).5. Scene Applications
This product is widely used in the field of infrastructure construction, and each model is specifically designed for particular application scenarios.
PC32.5: Residential buildings, rural construction, masonry mortar, wall plastering, non-load-bearing concrete components;
PO42.5: Mid- to high-rise buildings, bridges and roads, hydraulic engineering projects, industrial plants, and general-purpose concrete structures;
PII52.5: Supertall buildings, long-span bridges, dam tunnels, precast concrete components (beams/columns/slabs), and marine engineering.
6. Success Stories
7. Construction Method
1. Material Preparation: Ensure that the sand and aggregate (particle size 5–25 mm) are clean and free of impurities, and that the water quality meets the standards. Also, check the cement’s expiration date (valid for 3 months).
2. Mixing Process: Use a concrete mixer to mix the materials for 3–5 minutes until thoroughly homogeneous. For large-scale projects, manual mixing is strictly prohibited to ensure consistent mixture quality.
3. Pouring Operation: Complete the pouring within 2 hours after mixing is finished. Vibrate thoroughly to eliminate air bubbles and ensure that the formwork is completely filled.
4. Curing Treatment: Maintain moist curing for 7 to 14 days after pouring (spray water 2-3 times daily or cover with a curing membrane), and avoid exposure to direct sunlight or rapid drying.
8. Precautions for Use
Construction environment temperature: -5°C to 35°C. The water-to-cement ratio is an important performance indicator for this product. Please add water according to the manufacturer’s specified water-to-cement ratio, and use mechanical mixing equipment to ensure thorough and uniform blending before construction! If the water-to-cement ratio is improperly adjusted, it may affect the product’s performance. This product is a finished item—do not add any other substances arbitrarily, as this could compromise its functionality and quality system! If this product has expired, it should be properly disposed of and no longer used. Any leftover material that has been mixed but not fully used must never be combined with fresh material for further use! When carrying out outdoor construction in rainy weather, a rain shelter must be set up. The mixed material must be used within 30 minutes; once the initial setting time has passed, the slurry will begin to set and lose its effectiveness! Once the package is opened, the contents must be used up in one go to prevent moisture absorption and clumping.
9. Reasons to Choose Us
- Our company has a professional technical R&D team that provides free assistance in resolving all technical challenges you may encounter during construction.
- The raw materials used in our company’s products undergo rigorous screening, and we carefully select imported admixtures that are scientifically proportioned. The quality tolerance for the three-stage processing does not exceed one-thousandth, ensuring that their functional characteristics meet the diverse application requirements of our customers.
- High cost performance: Choose our company’s products. You’ll save 50% on labor, 50% on materials, and 50% on time—boosting construction efficiency and delivering significant economic benefits. We’ll ensure the quality of your project, giving you peace of mind and eliminating any future worries.
- Provide third-party type test reports, certificates of conformity, warranty certificates, special invoices, MSDS, and TCIR.
- Qualification Certifications: CCC, CMA, CNAS, ISO9001, CE/FCC; Product Implementation Standard GB/T175-2023
- We have successful track records in the supply chain for large-scale wind power projects both domestically and internationally. Quality commitment guaranteed!
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