天气预报15天查询> 其他> 混凝土抗渗的等级都包括哪些

混凝土抗渗的等级都包括哪些

更新时间: 2020-11-03 00:00:00     

混凝土试件在抗渗试验时所能承受的最大水压力,分为P4、P6、P8、P10、P12五个等级。

常用的办法是掺用引气型外加剂,使混凝土内部产生不连通的气泡,截断毛细管通道,改变孔隙结构,从而提高混凝土的抗渗性。此外,减小水灰比,选用适当品种及强度等级的水泥,保证施工质量,特别是注意振捣密实、养护充分等,都对提高抗渗性能有重要作用。

关键词: 混凝土 等级 包括 哪些

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-1797479/ | 耗时:0.1413 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=1797479 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1797479 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1797479 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1106619,1128521,1048878,1062870,1107058,1109118,1103971,1072797,1094053,1103556,1078332,1069889,1092225,1096354,1065049,1094683,1089058,1075551,1044565,1076696,1103780,1106725,1368851,1077960,1110620,1086904,1128910,1081197,1069505,1092129) ORDER BY field (ArticleID,1106619,1128521,1048878,1062870,1107058,1109118,1103971,1072797,1094053,1103556,1078332,1069889,1092225,1096354,1065049,1094683,1089058,1075551,1044565,1076696,1103780,1106725,1368851,1077960,1110620,1086904,1128910,1081197,1069505,1092129)