EN
Introduction to Calcium Dihydroxide
Calcium dihydroxide, commonly known as slaked lime or hydrated lime, is a versatile inorganic compound with widespread applications in agriculture and construction. Derived from the hydration of calcium oxide (quicklime), it exhibits alkaline properties, high reactivity, and cost-effectiveness—making it an indispensable material in multiple industries. Shijiazhuang Shengping Minerals Co., Ltd. (SP-Mine), a trusted supplier with 11+ years of experience in non-metallic minerals, produces high-purity calcium dihydroxide through advanced processing technologies. With strict quality control, ISO certification, and SGS verification, the company’s product meets global standards, offering consistent performance for agricultural and construction needs. Backed by an annual production capacity of 100,000+ tons and factory-direct pricing, SP-Mine ensures stable supply and cost savings for clients worldwide.
Applications in Agriculture
Calcium dihydroxide plays a pivotal role in modern agriculture, addressing soil health, crop protection, and nutrient optimization:
Soil pH Adjustment and Improvement
Acidic soils (pH < 6.0) hinder nutrient absorption and crop growth. Calcium dihydroxide’s alkaline nature neutralizes soil acidity, raising pH to an optimal range (6.0–7.5) for most crops. SP-Mine’s high-purity calcium dihydroxide (Ca(OH)₂ content ≥ 95%) ensures effective neutralization without introducing harmful impurities. Unlike low-quality alternatives, its uniform particle size (200–400 mesh) guarantees even distribution in soil, preventing localized pH imbalance. This application enhances soil structure, promotes microbial activity, and improves the availability of essential nutrients like nitrogen, phosphorus, and potassium—boosting crop yields by 15–30% in acidic soil regions.
Crop Disease and Pest Control
Calcium dihydroxide acts as a natural bactericide and fungicide, suppressing soil-borne pathogens (e.g., Fusarium, Pythium) and pests (e.g., nematodes). When applied as a soil amendment or foliar spray, it creates an alkaline environment that inhibits pathogen growth and reduces pest infestations. SP-Mine’s product, free from heavy metals (meeting EU REACH and US FDA standards), is safe for organic farming and food crop production. It also helps control powdery mildew and blight in fruits and vegetables, reducing the need for synthetic pesticides—aligning with sustainable agriculture practices.
Nutrient Supplement for Crops
Calcium is a critical nutrient for plant cell wall formation, fruit development, and disease resistance. Calcium dihydroxide provides bioavailable calcium to crops, preventing calcium deficiency disorders like blossom-end rot in tomatoes and bitter pit in apples. SP-Mine’s calcium dihydroxide, processed with the same precision as its high-purity kaolin and silica sand, ensures consistent nutrient release. When combined with fertilizers, it enhances nutrient uptake efficiency, resulting in healthier plants, improved fruit quality, and longer shelf life for harvested crops.
Applications in Construction
In the construction industry, calcium dihydroxide is valued for its binding, protective, and functional properties:
Mortar and Plaster Formulation
Calcium dihydroxide is a key component in traditional and modern mortar, acting as a binder and plasticizer. It reacts with carbon dioxide in the air to form calcium carbonate, creating a strong, durable bond between bricks, stones, or concrete blocks. SP-Mine’s product offers excellent workability—its fine particle size (325-mesh sieve residue ≤ 0.1%) ensures uniform mixing with sand and water, reducing cracking and improving adhesion. Used in interior and exterior plaster, it provides a smooth, breathable finish that resists moisture and mold growth, ideal for residential and commercial buildings.
Concrete Additive for Durability
As a concrete admixture, calcium dihydroxide enhances compressive strength, sulfate resistance, and alkali-aggregate reaction (AAR) control. It neutralizes acidic compounds in concrete, preventing corrosion of steel reinforcements and extending the service life of structures like bridges, roads, and buildings. SP-Mine’s calcium dihydroxide meets JC/T standards for construction materials, ensuring compatibility with various concrete mixes. Its low moisture content (≤ 8%) avoids affecting concrete setting time, making it suitable for precast and cast-in-place concrete projects.
Wastewater and Odor Treatment in Construction
Construction sites often generate acidic wastewater and odorous gases (e.g., hydrogen sulfide) from concrete mixing and waste decomposition. Calcium dihydroxide effectively neutralizes acidic wastewater, adjusting pH to compliant levels, and absorbs odorous compounds through chemical reaction. SP-Mine’s bulk supply capability (1-ton bags or custom packaging) caters to large-scale construction projects, providing a cost-effective solution for environmental compliance. Its fast-acting alkaline properties reduce treatment time, minimizing environmental impact and ensuring regulatory adherence.
Wall Moisture Proofing and Preservation
Calcium dihydroxide is used in wall coatings and waterproofing materials to prevent moisture penetration. It forms a dense, water-resistant layer when applied to masonry walls, protecting indoor spaces from dampness and mold. In historical building restoration, it serves as a traditional lime wash, preserving stone and brick structures while maintaining breathability. SP-Mine’s product, free from synthetic additives, is compatible with natural building materials, making it a preferred choice for restoration and eco-friendly construction.
SP-Mine’s Product Advantages for Agricultural and Construction Use
SP-Mine’s calcium dihydroxide stands out for its tailored benefits in both industries:
Superior Quality and Purity
The product undergoes rigorous testing, with Ca(OH)₂ content ≥ 95%, low heavy metal levels, and consistent particle size. Backed by SGS certification and comprehensive test reports, it meets agricultural and construction standards worldwide—ensuring safe use in food crops and durable performance in structures.
Stable Supply and Cost Efficiency
With an annual production capacity of 100,000+ tons and a 10,000㎡ storage facility, SP-Mine fulfills bulk orders promptly. Its factory-direct pricing eliminates middleman markups, reducing client costs by 20–25%. Flexible packaging options (25kg bags, bulk tons) and 24-hour response support cater to diverse project scales.
Customization and Technical Support
SP-Mine offers OEM/ODM services, adjusting particle size, purity, and packaging to meet specific application needs—whether for precision agricultural use or high-strength construction materials. Its professional technical team provides online guidance on dosage, application methods, and compatibility, ensuring optimal results for every project.
Practical Application Cases
SP-Mine’s calcium dihydroxide has proven effective in real-world scenarios:
- A large-scale vegetable farm in North China used the product to adjust acidic soil (pH 5.2 to 6.8), resulting in a 22% increase in tomato yield and reduced blossom-end rot incidence by 80%.
- A construction company in Southeast Asia incorporated the product into mortar for a high-rise building project, improving mortar adhesion and reducing wall cracking by 30% compared to standard lime products.
- An organic orchard in Europe utilized SP-Mine’s calcium dihydroxide for pest control, cutting synthetic fungicide use by 40% while maintaining fruit quality and meeting organic certification requirements.
Conclusion
Calcium dihydroxide’s versatility, affordability, and effectiveness make it a cornerstone material in agriculture and construction. Its ability to improve soil health, protect crops, enhance building durability, and support environmental compliance aligns with the evolving needs of both industries. Shijiazhuang Shengping Minerals Co., Ltd., with its 11+ years of mineral expertise, strict quality control, and customer-centric services, delivers high-purity calcium dihydroxide that meets global standards. Whether for agricultural soil improvement, crop protection, construction mortar, or concrete enhancement, SP-Mine’s product offers consistent performance and cost savings. Backed by stable supply, customization options, and technical support, SP-Mine is the trusted partner for businesses seeking reliable calcium dihydroxide solutions in agriculture and construction.