Overview
Autoclaved solid brick is a manufactured construction material produced by curing a mixture of lime, sand, and/or fly ash under high-pressure steam in an autoclave. This process creates calcium silicate hydrates, giving the bricks superior strength and durability compared to traditional clay bricks. Unlike fired bricks, autoclaved bricks don't require high-temperature kilns, making them more energy-efficient and environmentally friendly. They've become a preferred choice for modern construction projects in China and other countries with strict building codes.
Product Features
The key advantage of autoclaved solid bricks lies in their consistent quality and precise dimensions (typically 240×115×53mm). Their homogeneous composition ensures uniform strength throughout each brick, with compressive strength ratings ranging from MU10 to MU25. These bricks offer excellent thermal insulation properties due to their dense microstructure, helping buildings meet energy efficiency standards. They're also non-combustible (Class A fire rating) and resistant to frost damage, making them suitable for various climates.
Main Uses
Primarily used for load-bearing walls in residential and commercial buildings up to six stories high. Their high strength-to-weight ratio makes them ideal for foundation construction and basement walls where moisture resistance is critical. In industrial settings, they're employed for factory partitions and furnace linings due to their heat resistance. Architects often specify them for exposed brickwork facades because of their clean appearance and minimal efflorescence.
Culture and Development
The technology originated in Germany in the 1920s as an alternative to energy-intensive fired bricks. China adopted the method extensively during the 1990s construction boom, particularly utilizing fly ash from coal plants as raw material. Modern production follows GB/T 11945-2019 national standards in China, with continuous improvements in automation and quality control. Recent developments include colored varieties for architectural applications and larger-format blocks to speed up construction.
B2B Procurement Guide
Industrial buyers should verify manufacturer certifications (ISO 9001, CE marking if exporting) and request test reports for compressive strength, water absorption (<20%), and freeze-thaw resistance. Bulk orders typically require 15-30 day lead time. Quality checks should include visual inspection for cracks or chips, dimensional tolerance measurements (±2mm), and batch consistency. For large projects, consider sourcing from manufacturers near construction sites to reduce transportation costs of this heavy material.
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