1、一、磷酸钾镁水泥基本配方的正交试验关于磷酸钾镁水泥的制备研究大致包括以下几个方面：磷酸二氢钾与氧化镁质量比（P/M）,用水量（W/C）,硼砂与氧化镁质量比（B/M）,复合缓凝剂与氧化镁和磷酸二氢钾质量和的比值（F（M+P）0本试验以P/M,W/C,缓凝剂三个因素作为正交试验的因子，各因子取五个不同水平，缓凝剂有两种类型，分别为硼砂和复合缓凝剂。在试探性试验的基础上，确定正交试验因素水平表（见表1-1）：采用五水平三因素的L25（53）的正交表，以流动性，凝结时间和7天的基本力学性能指标（抗压强度，抗折强度），来确定磷酸钾镁水泥的基准配合比，表12是正交试验方案。表1-1正交试验因素水平表因素水
2、平P/MW/C缓凝剂（%）11:20.123%21:30.145%31:40.168%41:50.1810%51:80.2012%因素水平P/M水胶比缓凝剂(%)11:20.123%21:20.145%31:20.168%41:20.1810%51:20.2012%61:30.125%71:30.148%81:30.1610%91:30.1812%101:30.203%111:40.128%121:40.1410%131:40.1612%141:40.183%151:40.205%161:50.1210%171:50.1412%181:50.163%101:50.185%201:50.208%
3、211:80.1212%221:80.143%231:80.165%241:80.188%251:80.2010%二、正交试验配合比根据表1-2的正交试验表格，制定出了表2-l(a),2l(b)的正交试验配合比,其中表2-l(a)以硼砂作为缓凝剂，表2-l(b)以复合缓凝剂作为缓凝剂。编号MgO(g)磷酸二氢钾(g)硼砂(g)水(g)P-I1333.3666.740240P-21333.3666.766.7280P-31333.3666.7106.7320P-41333.3666.7133.3360P-51333.3666.7160400P-6150050075240P-71500500120
4、280P-81500500150320P-91500500180360P-IO150050045400P-Il1600400128240P-121600400160280P-131600400192320P-14160040048360P-15160040080400P-161666.7333.3166.7240P-171666.7333.3200280P-181666.7333.366.7320P-191666.7333.3111.1360P-201666.7333.3177.8400P-211777.8222.2213.3240P-221777.8222.253.3280P-231777.
5、8222.288.9320P-241777.8222.2142.2360P-251777.8222.2177.8400编号MgO(g)磷酸二氢钾(g)硼砂(g)磷酸氢二钠(g)氯化钙(g)水(g)F-I1333.3666.7123612240F-21333.3666.7206020280F-31333.3666.7329632320F-41333.3666.74012040360F-51333.3666.74814448400F-61500500206020240F-71500500329632280F-815005004012040320F-915005004814448360F-IO150
6、0500123612400F-Il1600400329632240F-1216004004012040280F-1316004004814448320F-141600400123612360F-151600400206020400F-161666.7333.34012040240F-171666.7333.34814448280F-181666.7333.3123612320F-191666.7333.3206020360F-201666.7333.3329632400F-211777.8222.24814448240F-221777.8222.2123612280F-231777.8222.2206020320F-241777.8222.2329632360F-251777.8222.24012040400三、试验过程此次试验先按照表2-l(a)进行实验，试验过程中发现编号为P-I的配方做出来的磷酸钾镁水泥浆体较干且凝结时间较快，最后粘结在搅拌锅上，造成试验无法继续进行。准备这周以及下周进行余下的试验，测出相关数据，得到磷酸钾镁水泥的基本配方，然后进行下一步试验。以上是这两周的工作量，望老师批评指正。
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