钙质材料对铁尾矿加气混凝土砌块性能的影响

Influence of Calcium Materials for the Mechanical Properties of Autoclaved Aerated Concrete Based on Iron Ore Tailings

通过对钙质材料掺量不同的研究,得出了铁尾矿加气混凝土钙质材料的优化配比,并对各因素在加气混凝土中的作用机理进行了分析。由XRD测试分析可知,成品中主要的矿物成分为托贝莫来石,此外还有石膏和尾矿中残留的石英等。SEM结果显示,成品中形成了一种针状或板状的结晶相,相互交织成网状结构,有效地提高了制品的强度。

Based on the different research of calcium materials admixture,the optimum proportions of calcium materials were obtained,the action mechanism were also analyzed in the preparation process of autoclaved aerated concrete.The XRD results suggested that the major mineral phases in the AAC product were tobermorite with residue quartz and anhydrite.The examination by scanning electron microscope depicted a waving curved morphology of newly formed crystalline phases,which intertwined into mesh structure and played an important role in the development of products strength.