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水泥砂浆的结石强度除与水泥标号有关外，还受搅拌时间的影响；水灰比仍是增加浆液结石强度和密实度最重要的因素．施工中表明，水灰比为0．38～0．55是比较合适的。
The stone strength of cement mortar is not only related to the cement grade, but also affected by the mixing time. The water-cement ratio is still the most important factor for increasing the strength and density of grout stone. Construction shows that the water-cement ratio of 0.38 ~ 0.55 is more appropriate.