骨料对氧化铝质不烧砖性能的影响研究

Effect of Aggregate Types on Alumina Unburned Brick Performance

以板刚玉、棕刚玉、88高铝矾土等为骨料,加入铝镁结合剂和水,制备了不同骨料的氧化铝质不烧砖。研究了骨料对氧化铝质不烧砖气孔率、体积密度、抗折强度、耐压强度、抗渣性能以及高温抗折强度的影响。实验结果表明:骨料组成为棕刚玉或88高铝矾土和棕刚玉时,试样体积密度较大,气孔率较小,不烧砖制品结构致密;骨料组成为88高铝矾土、棕刚玉和板状刚玉时,试样的重烧线变化率最小,不烧砖制品在高温时体积变化率小,稳定性强;骨料组成为棕刚玉时试样高温耐压强度最高;骨料组成为88高铝矾土和棕刚玉时,试样的常温及中温耐压强度最高,不烧砖制品抗渣性能好。

With plate corundum,corundum,88 high bauxite etc. as aggregate,and aluminum magnesium bond binder and water as binder,different kinds of alumina unburned bricks are prepared. The effects of kinds of aggregate on porosity,bulk density,bending strength,compressive strength,slag resistance and the high temperature bending strength of alumina unburned bricks are studied. The experimental results show that the brick products have bigger volume density,smaller porosity and compact structure When aggregates are composed of corundum or 88 bauxite and corundum. The brick products have smaller reheating linear change rate,small volume change rate and strong stability when aggregate is composed of88 high aluminum bauxite,corundum and tabular corundum. The samples have highest compressive strength at high temperature when aggregate is composed of corundum. Samples have highest compression strength at room temperature and medium temperature,and unfired brick products have higher antierosion ability when aggregates are composed of 88 high aluminum bauxite and corundum.