40Mpa孔道压浆配合比
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲一、设计依据：《公路桥涵施工技术规范》（JTJ041-2000）重点控制
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲1、稠度
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲2、泌水率及膨胀率
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲3、强度。
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲二、设计要求：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲1、配制40Mpa孔道压浆配合比；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲2、稠度要求14-18S；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲3、泌水率及膨胀率要求符合规范。
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲三、 设计条件：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲1、P.O 52.5R II；（经检测各项指标符合规范要求）
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲2、外加剂FDN-1（掺量暂取4%）
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲3、膨胀剂（低泌水、微膨胀，掺量暂取1%）
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲4、饮用水（经检测各项指标符合规范要求）
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲四、试配步骤：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲①计算试配强度：净浆配合比设计材料单纯，只要计量准确不存在太大的偏差，结合混凝土配制强度计算要求，标准偏差σ取2.5Mpa就完全可以了，Rp=R+1.645×2.5=40+4.1=44.1Mpa；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲②确定水灰比：暂取0.39；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲③假定容重1900㎏/m3(经验取值)；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲④计算每立方米各种材料用量
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲⑴水泥＋外加剂+膨胀剂+水=1900；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲⑵水/水泥=0.39；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲经计算得：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲水泥=1319㎏/m3取1320㎏/m3；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲外加剂=1320×4%=52.8㎏/m3；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲水=1320×0.39=514.8㎏/m3；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲膨胀剂=1320×1%=13.2㎏/m3；
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲五、 试拌0.01 m3材料用量：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲详细请下载附件：
öK§ xy_În#bbs.3c3t.comÔ :â3iî̲附件:
40Mpa孔道压浆配合比.doc