水泥胶砂强度实验操作方法是什么?

2025-03-16 00:20:54
推荐回答(1个)
回答1:

 水泥胶砂强度检验方法
一、目的和适用范围
  本方法适用于硅酸盐水泥、普通水泥、矿渣水泥、火山灰水泥、粉煤灰水泥的抗折强度检验。风指定采用本方法的其他品种水泥经试验确定水灰比后亦可适用。

二、仪器设备
  胶砂搅拌机,胶砂搅拌台,试模及下料漏斗,抗折试验机,抗压试验机和抗压夹具,刮平刀。

三、试验步骤
  1、试体成型。
  2、养护。
  3、抗折强度试验。
  4、抗压强度试验

四、计算
抗折强度:
  Rf=1.5Ff*L/(b*h^2)
Rf-抗折强度(MPa)
Ff-破坏荷重(N)
L-支撑圆柱中心距即100mm
b、h-试体断面宽及高,均为40mm。
抗折强度计算值精确到0.1MPa

  抗折强度结果取三块试体平均值,精确至0.1MPa。当三个强度值中有超过平均值±10%的,应剔除后再平均,以平均值作为抗折强度试验结果。
抗压强度:
  Rc=F/A
Rc-抗压强度(MPa)
F-破坏荷重(N)
A-受压面积即40mm*40mm
  抗压强度计算值精确到0.1MPa
  六个抗压强度结果为6个试件抗压强度的平均值,精确至0.1MPa,如果6个强度值中有一个超过平均值的±10%的,应剔除后以剩下的5个值的算术平均值作为最后结果,如果5个值中再有超过平均值±10%,的,则该组试件无效。

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