春觉根据JGJ/T98-2010 砌筑砂浆配合比设计规程以下配比比例皆是以重量为单位。我们来看看M5、M7.5、M10、C20、C25水泥砂浆的配比。
一、M5水泥砂浆的配合比：
水泥：中砂=1：5.23。
条件：施工水平，一般；砂子，中砂；砂子含水率：2.5%；水泥实际强度：32.5 MPa
二、M7.5水泥砂浆配合比：
砂浆试配时各材料的用量比例： 水泥∶砂=260∶1541=1∶5.93
条件：用于砌筑沟井的水泥砂浆，强度为M7.5，稠度30~50mm。原材料的主要参数，水泥：32.5级水泥；中砂，堆积密度为1541kg/m3；施工水平：一般。
选取水泥用量260kg/m3，砂子用量QS=1541kg/m3，水量为280kg/m3
三、M10水泥砂浆配合比：
砂浆各材料的用量比例：水泥∶砂=240∶1221=1∶5.09
条件：用于砌筑毛石挡土墙的水泥砂浆，强度为M10，稠度30~50mm。原材料的主要参数，水泥：32.5级水泥；中砂，堆积密度为1221kg/m3；施工水平：一般。
水泥用量240kg/m3，砂子用量QS=1221kg/m3，水量为290kg/m3
四、C20混凝土配合比：水泥：砂：碎石：水=1：1.83：4.09：0.50
条件：坍落度35–50mm；砂子种类：粗砂，配制强度：28.2MPa；石子：河石；最大粒径：31.5mm;水泥强度等级32.5，实际强度35.0MPa .
每立方米混凝土中，水泥含量：326Kg;砂的含量：598Kg;碎石：1332Kg
五、C25混凝土配合比：水泥：砂：碎石：水=1:1.48:3.63:0.44
条件：坍落度35–50mm；砂子种类：粗砂，配制强度：28.2MPa；石子：河石（卵石）；最大粒径：31.5mm;水泥强度等级32.5，实际强度35.0MPa .
其中每立方米混凝土中，水泥含量：370Kg;砂的含量：549Kg;碎石：1344Kg
以上是M5、M7.5、M10、C20、C25水泥砂浆的配比。可以根据实际条件调整配合比。变化幅度不会太大。
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