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国内水泥混凝土路面建造量的逐步增加,需要耗用大量的水泥。根据道路混凝土抗折强度及耐磨等性能要求,水泥标号一般要求为425~＃以上,而我国地方水泥产量占70％以上,标号多为325~＃。采用真空脱水工艺可提高混凝土的强度和耐磨、抗裂等性能,抗折强度提高更多。实践证明,在道路混凝土中应用325~＃水泥,只要采用该工艺,即可满足各项性能要求,且可取得加快施工速度,降低工程造价等效益。
The gradual increase in the construction volume of domestic cement concrete pavement requires the consumption of a large amount of cement. According to the requirements of the road concrete’s flexural strength and wear resistance, the general cement labeling requirement is 425~#, while the output of local cement in China accounts for more than 70%, and the label is mostly 325~#. Vacuum dehydration process can improve the strength and wear resistance, crack resistance and other properties of concrete, and increase the bending strength. Practice has proved that in the application of 325~# cement in road concrete, as long as the process is adopted, it can meet various performance requirements, and the benefits such as quicker construction speed and lower project cost can be achieved.