[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3Ivp0KX45cDpndRPDWX_YSSyVhNu5NrRfNkvUWvvwpU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-12-08 20:59:07",112010528,[8,9,10,11],"钢筋表面刷油漆","钢筋表面用碱处理","提高混凝土的密实度","加入阻锈剂",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},99,"dba0c8b4dd023b586897f935f7aa8ea0","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93f1c1995b054801a7e873e60608d524.jpg","土木工程材料","work_31228394","单元自测9.2","防止混凝土中钢筋锈蚀的主要措施是( )",[21,32,41,50,59,68,77,80,89,99],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],112010522,[25,26,27,28],"空隙率小","总表面积小","总表面积大","空隙率和总表面积均较小","配制混凝土用砂的要求是尽量采用( )的砂","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],112010523,[36,37,38,39],"片状","针状","小立方体状","棱锥状","碎石的颗粒形状对混凝土的质量影响甚为重要,下列何者的颗粒形状最好?( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],112010524,[45,46,47,48],"&le;80","&le;60","&le;40","&le;25","混凝土拌合物塌落度试验只适用于粗骨料最大粒径( )mm者",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],112010525,[54,55,56,57],"增加混凝土中的游离水","增加混凝土的抗渗能力","延缓混凝土的凝结时间","使水泥水化作用正常进行","混凝土养护应注意夏天保持必要湿度、冬天保持必要温度,其主要原因是( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],112010526,[63,64,65,66],"混凝土强度要求","小于最大水灰比","大于最大水灰比","强度要求与最大水灰比的规定","设计混凝土配合比时,选择水灰比的原则是( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],112010527,[72,73,74,75],"1016","1316","564","654","试配混凝土,经计算砂、石总质量是1880kg,砂率是30%,则石子用量为( )kg",{"answer":78,"createTime":5,"id":6,"options":79,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],112010529,[84,85,86,87],"单位用水量","骨料级配","混凝土密实度","孔隙特征","在下列因素中,影响混凝土耐久性最重要的是( )",{"answer":90,"createTime":91,"id":92,"options":93,"question":98,"source":30,"type":31},[],"2023-12-08 21:05:23",112010530,[94,95,96,97],"抗拉","抗压","抗弯","抗剪","混凝土的( )强度最大",{"answer":100,"createTime":5,"id":101,"options":102,"question":107,"source":30,"type":31},[],112010531,[103,104,105,106],"0.90","0.95","1.05","1.00","普通混凝土立方体强度测试,采用100mm&times;100mm&times;100mm的试件,其强度换算系数为( )"]