The apparent porosity of the samples was significantly decreased and the linear expansivity increased with increasing the forming pressure. 随着成型压力的增加,试样的显气孔率明显减小,线变化率增加。
In this paper, the linear expansivity of plaster mould mixture together with tensile strength, flowability and solidification time were studied mainly. 本文主要研究了石膏型混合料的线膨胀率,其次研究了抗拉强度、流动性和胶凝时间等工艺性能。