Autoclaved brick from low-silicon tailings

作者：Zhao Feng qing^*; Zhao Jing; Liu Hong jie

来源：Construction and Building Materials, 2009, 23(1): 538-541.

DOI：10.1016/j.conbuildmat.2007.10.013

• Tailings
• Slag
• Fly ash
• Cementing material
• Autoclaved brick

The load-bearing brick is made from low-silicon tailings by pressing and autoclaving process, in the presence of alkali-activated slag/fly ash cementing material (AAFSC). Tailings accounts for 83% of the total mass of the brick. The compressive strength of the brick is up to 16.1 MPa, bending strength 3.8 MPa, and with low drying shrinkage and good freeze-thaw resistance. Some factors influencing the mechanical strength of the brick including forming pressure, forming water content and curing regime, are investigated. The hydration products, freeze-thaw durability and anti-carbonation characteristics of the products are discussed.

• 出版日期2009-1
• 单位河北大学