影响高磷石膏含量蒸压制品抗压强度的若干因素研究.pdfVIP

学兔兔 新癯建巍柑 全国中文核心期刊 影晌离磷石膏含量蒸压素Ij品抗压强度的 若干因素研究 孟家庆，曹德光，范俊杰，陆石强 (广西大学 化学化工学院，广西 南宁 530004) 摘要：按m(磷石膏)：m(矿渣)：m(细砂)：m(水泥熟料)：m(三水铝矿)：m(6-灰)：56．1：18．7：9．3：9．3：2．8：3．7制备高磷石膏含量蒸压 制品，探索了减水剂、成型压力、蒸压温度、蒸压时间和龄期等因素对高磷石膏含量蒸养制品抗压强度的影响规律。结果表明，所采 用萘系减水剂的最佳掺量为0．50％，最佳的蒸压温度为120℃，合理的成型压力在25～30 MPa，蒸压时间应不少于8 h。蒸压制品在 3～28 d内强度先下降后再增长，样品在后期自然养护过程中不存在 ‘般混凝土的收缩现象，且稍有膨胀。 关键词：磷石膏；蒸压制品；蒸压条件；抗压强度 中图分类号：TQ177．3~75 文献标识码：B 文章编号：1001—702X(2010)10—0091—03 Some factors affecting the compressive strength of high content phosphogypsum autoclaved product MENG Jiaqing，CA0 Deguang，FAN Junjie，LU Shiqiang (Schopl of Chemistry Chemical Engineering，GuangxiUniversity，Nanning 530004，Guangxi，China) Abstract：High content phosphogypsum autoclaved product was prepared by the mixing ratio m(phosphogypsum)：m(slag)： m(find sand)：m(cement clinker)：m(trihydrate bauxite)：m(1ime)=56．1：18．7：9．3：9．3：2．8：3．7，and the influence law of ractors factors af- fecting the compressive strength of the product，such as content of water reducer，molding pressure，autoclaving temperature，autoclav— ing time and age were studied．The results show that the optimum water reducer content is O．50％：the optimum autoclaving tern- perature is 120 oC：the reasonable molding pressure range is 25～30 MPa；autoclaving time is at least 8 hours．Within the age from 3 to 28 days，the compressive strength of autoclaved product decreased and then increased．And it was different from normal con- crete，shrink as we know，long natural cured autoclaving product swelled slightly． Key words：phosphogypsum；autoclaved product；aut