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水泥中游离石灰和氧化镁含量过多,都会引起水泥安定性不良。一般用蒸煮试验即可检验出游离石灰的危害作用;要检验出游离氧化镁的危害作用,则必须进行压蒸试验。由于压蒸试验的试体尺寸规定为25×25×250毫米,压蒸釜的容积要求较大,同时要有良好的控制设备,所以目前用压蒸试验检验水泥安定性的尚不多。我们通过试验研究,拟订了一个小试体压蒸试验方法。此方法具有以下优点:1.试体尺寸为1×1×6厘米的棱柱体,
Excessive amounts of free lime and magnesium oxide in cement can cause poor cement stability. Generally, the harmful effects of free lime can be detected by cooking test; in order to test the harmful effects of free magnesium oxide, the pressure steaming test must be conducted. Since the size of the test body of the autoclave test is specified as 25×25×250 mm, the volume of the autoclave is required to be large, and good control equipment is required at the same time. Therefore, there are not many cement steam stability tests for the stability test at present. We have developed a pilot test method for pressure steaming through experimental studies. This method has the following advantages: 1. The prism size of the test body is 1×1×6 cm.