水利水电科学研究院仪器工厂最近研制出一种混凝土含气量测定仪(见图1)。它的原理是以气体波义尔定理为基础,把有一定初始压力和一定体积的空气,引入装有新鲜混凝土的压力容器中,由于压力降低与新鲜混凝土中的含气量有关(见图2),在测定混凝土含气量时,可先从压力表上读出压力降低值,再由混凝土 Instrument Institute of Water Conservancy and Hydropower Research Institute recently developed a concrete air content analyzer (see Figure 1). Its principle is based on the gas Boyle theorem, the introduction of a certain initial pressure and a certain volume of air into the pressure vessel containing fresh concrete, due to the pressure reduction and fresh concrete gas content (see Figure 2) , In measuring the gas content of concrete, the pressure gauge can be read out from the pressure reduction, and then by the concrete