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二、测定方法混凝土气密性的测定方法很多,归纳起来,可以分成——气压降测定法和透气量测定法两类。前者是通过管内压降测定,求出Q、q值;后者是将透过混凝土的气体全部收集起来,直接测出其体积,求出Q、q值。现介绍如下: 1.管线压降测定法自应力钢筋混凝土输气管线的试压检验,一般在管线铺设完毕、半覆土并让管体充分吸湿后进行。空气由压缩机打入,待管内气体温度和压力稳定后,即行测定。
Second, the determination method Determination of concrete airtightness many methods, summed up, can be divided into - pressure drop measurement and permeability measurement two categories. The former is to determine the Q and q values by measuring the pressure drop in the pipe. The latter is to collect all the gas passing through the concrete and measure the volume directly to determine the Q and q values. Now it is introduced as follows: 1. Pipeline pressure drop test method Pressure test of self-stressed reinforced concrete gas transmission pipelines is generally carried out after the pipelines are laid, half-buried and the pipes are fully hygroscopic. The air is driven by the compressor and measured after the temperature and pressure of the gas in the pipe are stabilized.