掺磷石膏的加气混凝土的制备工艺研究

Preparation of Aerated Concrete by Adding Phosphor-Gypsum

用粉煤灰为原料,分别研究了磷石膏、氧化钙和砂的加入量对试样强度的影响。研究发现,磷石膏掺量增加,试样的强度下降;氧化钙的加入量增加,试样强度先上升后下降;加入100%的河砂对试样强度没有影响。磷石膏掺量为10%、氧化钙掺量为20%、河砂加入量为100%、铝粉加入量为0.4%,制备的加气混凝土在200℃保温5h后,加气混凝土强度为1.23MPa,干密度为318Kg/m3。

The effects of phosphor--gypsum, calcium oxide and sandon the sample strength were studied. The results indicated the sample strength decreased with increasing the amount of phosphor --gypsum. The sample strength firstly increased, finally decreased with increasing the amount of cal- cium oxide. The sample strength was not influenced by adding 100% sand. The aerated concrete was prepared by using 10% phosphor--gypsum, 20% calcium oxide, 100% sand and 4% aluminum pow der as the raw material and heating at 200℃ for 5h, with 1.23MPa in strength and 318Kg/m3 indensi- ty.