Overview
LC7.5 lightweight aggregate is a manufactured or naturally occurring porous material with a bulk density below 1.2 g/cm³, classified by its 7.5 MPa minimum compressive strength. It is produced through high-temperature sintering of industrial byproducts like fly ash or shale, creating a honeycomb structure that reduces weight while maintaining durability. The material aligns with ASTM C330 standards for structural lightweight aggregates. Widely adopted in green building projects, LC7.5 reduces dead loads by up to 30% compared to conventional aggregates. Its thermal insulation properties contribute to energy-efficient designs, making it a preferred choice for LEED-certified constructions in commercial and infrastructure sectors.
Physical and Chemical Properties
The aggregate exhibits a closed-pore microstructure, yielding a dry loose bulk density of 700-1200 kg/m³ and water absorption rates between 5-15% by weight. Chemically inert, it resists alkali-silica reactions and maintains pH stability between 7-9. Particle sizes typically range from 5-20mm, with angular morphology enhancing mechanical interlock in concrete matrices. Thermal conductivity ranges from 0.15-0.35 W/(m·K), outperforming traditional gravel by 50-70%. Fire resistance exceeds 2 hours at 1000°C due to the non-combustible ceramic-like structure. The material demonstrates freeze-thaw durability with less than 5% mass loss after 25 cycles per EN 1367-1 testing.
Main Applications
In high-rise construction, LC7.5 reduces structural loads for foundations and columns while meeting C30-C50 concrete strength requirements. Precast concrete elements like sandwich panels utilize its insulation properties to achieve U-values below 0.4 W/m²K without additional insulation layers. Transportation infrastructure benefits include lightweight embankments for soft soil areas and vibration-damping railway track beds. Floating structures such as pontoons leverage the aggregate's buoyancy (specific gravity 0.7-1.0). Specialized uses include radiation shielding in medical facilities and acoustic barriers along highways.
Safety and Storage
Although non-hazardous per GHS classification, prolonged exposure to airborne dust requires NIOSH-approved N95 respirators. Storage silos should maintain relative humidity below 65% to prevent moisture absorption that could affect batching consistency. Bulk bags must be stacked no higher than 3 layers to prevent particle crushing. Fire protection measures are minimal due to the material's inherent fire resistance. However, electrostatic discharge precautions apply during pneumatic conveying. Spills require only mechanical sweeping without chemical treatment, though local environmental regulations may dictate disposal methods for contaminated batches.
B2B Procurement Guide
Specify particle size distribution (preferably 40% 5-10mm + 60% 10-20mm) and chloride content (<0.02% for reinforced concrete). Request third-party test reports for 28-day compressive strength (≥7.5MPa) and sulfate resistance (≤5% expansion per ASTM C1012). For large projects, consider on-site quality checks of delivered batches using nuclear density gauges. Price negotiations should account for transportation costs—regional suppliers within 300km often offer 15-20% savings. Contractual clauses should address moisture content tolerances (±1% from ordered specification) and replacement policies for off-spec deliveries.
Related Manufacturers
- 主营：轻集料、轻骨料、混凝土、地面垫层、复合泡沫
- 主营：轻集料混凝土、轻质混凝土、泡沫混凝土
- 主营：陶粒混凝土、卫生间垫层、地面垫层、轻集料混凝土、A型轻集料、B型轻集料、干拌复合轻集料混凝土、lc7.5型轻集料混凝土、AB型轻集料混凝土、干拌轻集料混凝土、Lc7.5轻集料混凝土、轻骨料混凝土、屋面垫层用轻集料、LC5.0轻集料发泡、聚氨酯颗粒轻骨料、干拌复合轻骨料、保温回填轻骨料、干拌轻集料LC5.0、找坡垫层轻质保温、楼顶找平垫层、地面垫层屋面找坡
- 主营：玻璃鳞片胶泥、聚氨酯保温喷涂、b1级聚氨酯喷涂、轻集料混凝土A型、双组份聚脲喷涂、环氧玻璃鳞片胶泥、高温玻璃鳞片胶泥
- 主营：挤塑板、岩棉板、硅酸铝针刺毯、丽江轻集料厂家、复合硅酸盐板、b1级挤塑板、保温板、外墙岩棉板、玻璃纤维棉、防火棉、国标挤塑板、xps挤塑板、保温棉、耐火保温棉、橡塑板、隔音棉、硅酸铝纤维毯、外墙保温板、岩棉管、昆明硅酸铝针刺毯厂家、昆明挤塑板厂家、玻化微珠保温砂浆、昆明硅酸铝卷毡厂、昆明玻璃棉厂家、昆明岩棉板厂家、高密度挤塑板
- 主营：轻集料、轻骨料混凝土、地面垫层、复合填充
- 主营：玻镁板、防火板、阻火包、L型防火隔板、720型阻火包、400型阻火包、250型阻火包、轻集料混凝土、LC5.0型轻集料混凝土、LC7.5型轻集料混凝土、屋面垫层轻集料混凝土、柔性有机堵料、防火布、阻火模块、防火密封胶、防火泥、集装箱防火地板、挡烟垂壁防火布、弹性防火密封胶、防火隔板、防火膨胀模块、硅钛防火布、电缆桥架防火板、电缆防火涂料、钢结构防火涂料
- 主营：岩棉管、岩棉板、橡塑保温管、钢骨架轻型板、钢结构保温棉、泡沫玻璃板、电梯井吸音板、太空板、橡塑管、铝箔玻璃棉毡、砂浆岩棉复合板、STP真空板、玻璃棉管、挤塑板、憎水钢网岩棉板、防水透气膜、天基板、岩棉毡、隔汽膜、匀质板、硅酸铝针刺毯、聚氨酯板、耐高温反射层、酚醛板、纳米气凝胶毡
- 主营：橡塑保温管、硅酸铝针刺毯、岩棉板、钢骨架轻型屋面板、钢骨架轻型板、硅酸盐纤维防火卷材、橡塑保温材料、保温装饰一体板、纳米气凝胶毡、天基板、酚醛板、防水透气膜、聚氨酯管壳、泡沫玻璃板、挤塑板、岩棉管、玻璃棉管、硅酸铝管、石墨聚苯板、STP真空绝热板、玻璃棉卷毡、复合硅酸盐板、岩棉毡、离心玻璃棉板
- 主营：玻璃鳞片胶泥、环氧富锌底漆、氰凝防水防腐涂料、LC5.0型轻集料、LC7.5型轻集料、轻集料混凝土、轻骨料混凝土、环氧防腐涂料、8710饮用级防腐涂、聚氨酯防腐涂料
- 主营：混凝土、纳米气凝胶、陶粒混凝土、轻集料混凝土、保温砂浆、抗裂砂浆
- 主营：玻纤网格布、玻璃纤维网格布、工地外墙玻璃纤维网格、轻集料混凝土、A型轻集料混凝土、轻集料混凝屋面垫层、室内垫层轻集料混凝土、国标轻集料混凝土、内墙玻璃纤维网格
- 主营：回填填充、灰色颗粒、楼顶垫层、轻集料、轻骨料、轻集料混凝土、干拌复合轻集料混凝土、LC7.5轻集料混凝土、复合轻集料混凝土、轻骨料混凝土、B型轻集料混凝土、A型轻集料混凝土、轻集料厂家、屋面垫层用轻集料、LC5.0轻集料发泡、LC5.0轻集料混凝、干拌复合轻骨料、a型b型轻骨料、地面垫层、卫生间填平、聚氨酯泡沫颗粒、塑料花盆、蓝莓花盆、陶粒混凝土
- 主营：吸音棉、玻璃板、钢骨架、lc5、复合板、隔热布、太空板、橡塑管、隔音棉、酚醛板、楼面板、真空板、玻璃棉、呼吸纸、鸡蛋棉、海绵板、聚苯板、水泥板、发泡板、屋顶板、透气膜、防火水、抗爆板、保温管、岩棉板、阁楼板
- 主营：垫层回填轻集料、混凝土