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¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥一、 设计依据：《公路桥涵施工技术规范》（JTJ041-2000）重点控制¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥1、稠度¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥2、泌水率及膨胀率¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥3、强度。 ¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥
二、 设计要求：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥1、配制40Mpa孔道压浆配合比；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥2、稠度要求14-18S；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥3、泌水率及膨胀率要求符合规范。 ¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥
三、 设计条件：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥1、P.O 52.5R II；（经检测各项指标符合规范要求）¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥2、外加剂FDN-1（掺量暂取4%）¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥3、膨胀剂（低泌水、微膨胀，掺量暂取1%）¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥4、饮用水（经检测各项指标符合规范要求）¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥四、试配步骤：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥①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；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥②确定水灰比：暂取0.39；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥③假定容重1900㎏/m3(经验取值)；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥④计算每立方米各种材料用量¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥⑴水泥＋外加剂+膨胀剂+水=1900；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥⑵水/水泥=0.39；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥经计算得：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥水泥=1319㎏/m3取1320㎏/m3；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥外加剂=1320×4%=52.8㎏/m3；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥水=1320×0.39=514.8㎏/m3；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥膨胀剂=1320×1%=13.2㎏/m3；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥五、 试拌0.01 m3材料用量：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥水泥1320×0.01=13.2㎏；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥外加剂52.8×0.01=0.528㎏；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥膨胀剂52.8×0.01=0.528㎏；¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥水514.8×0.01=5.15㎏； ¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥结果整理：¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥40Mpa孔道压浆配合比:¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥水泥:外加剂:膨胀剂:水=1:0.04:0.01:0.39=50:2:0.5:19.5¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥实测容重1910㎏/m3；稠度17S；泌水率及膨胀率符合规范要求；R7天抗压强度43.7Mpa；达到设计标号的99%，符合设计及JTJ041-2000规范要求。¡¼nýÇbbs.3c3t.com^}Sê¶ÞÚ¥ %20(2)_1.gif)
