Experimental study of using Shanxi Lingqiu low-silica iron ore tailings to produce aerated concrete
Abstract：The samples of aerated concrete were successfully prepared in line with GB/T 11968-2006 of the A3.5, B06-class by low-silica iron ore tailings as the main raw material, aluminum powder as gas evolution agent. Iron ore tailings,silica sand,lime,cement and gypsum with the optimized ratio（mass ratio） was 40 ： 20 ： 25 ： l0 ： 5 in the case of maximizing the use of iron ore tailings, aluminum powder was added at 0. 057 % , water/solide ratio was 0. 57, the static stop curing at 70℃, the compressive strength and the calculated specific strength of the finished aerated concrete samples with the bulk density of 590 kg/m3 were 4. 11 and 6.97 MPa. The major mineral phases in the aera- ted concrete product were tobermorite with residue quartz and anhydrite. SEM and EDS results show that the finished product to form a network structure by CSH and tobermorite , the compressive strength of aerated concrete samples areeffectively improved.
Keywords：iron ore tailingsaerated concretecompressive strengthtobermorite
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1129-1133 )