Overview
Cement lime mortar is a traditional building material made by blending Portland cement, hydrated lime, sand, and water. It strikes a balance between the strength of cement and the flexibility of lime, making it ideal for masonry and plastering applications. Its composition typically ranges from 1:1:6 to 1:2:9 (cement:lime:sand by volume), allowing adjustments for specific project requirements. The lime component enhances workability and reduces shrinkage cracks, while cement provides compressive strength.
Physical and Chemical Properties
Cement lime mortar exhibits high plasticity, enabling easy application and shaping. It hardens through hydration (cement) and carbonation (lime), forming a durable matrix. The pH is alkaline (around 12–13), which deters mold growth. Key metrics include a 28-day compressive strength of 2.5–10 MPa, depending on the mix ratio. It has low thermal conductivity and moderate vapor permeability, contributing to energy efficiency and moisture management in buildings.
Main Applications
This mortar is widely used in bricklaying for load-bearing walls, due to its strong bond with clay bricks and concrete blocks. It’s also preferred for plastering interior/exterior surfaces, offering a smooth finish and resistance to weathering. In restoration projects, its compatibility with historic structures makes it a top choice. Specialty mixes may include additives like polymers or fibers for enhanced waterproofing or crack resistance.
Safety and Storage
Dry mortar mix should be stored in a cool, dry place to prevent premature hydration. Use within 6 months for optimal performance. During handling, avoid skin contact with wet mortar to prevent irritation or burns from alkalinity. Dispose of waste material responsibly, as hardened mortar is non-biodegradable. For large-scale projects, on-site mixing requires dust control measures to protect workers’ respiratory health.
B2B Procurement Guide
When sourcing cement lime mortar, prioritize suppliers with ISO 9001 certification or equivalent. Request test reports for consistency, setting time, and strength compliance. Bulk shipments (e.g., silo delivery) can reduce packaging costs for high-volume buyers. Consider regional availability of raw materials (e.g., local lime sources) to minimize logistics expenses. Negotiate contracts with clauses for batch consistency and timely delivery, especially for long-term projects.
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