经两年九个月时间对三根预应力粉煤灰陶粒混凝土梁长期荷载试验的量测表明,长期荷载下预应力粉煤灰陶粒混凝土梁的挠度,并不比普通预应力混凝土梁大,挠度增长规律在半对数纸上并不呈现线性关系,平均应变沿截面高度基本按线性分布。根据这一试验结果,我们对未裂缝预应力粉煤灰陶粒混凝土梁的刚度提出了计算建议;同时, The long-term load test of three prestressed fly ash ceramsite concrete beams over two years and nine months shows that the deflection of prestressed fly ash ceramsite concrete beams under long-term loading is not greater than that of ordinary prestressed concrete beams. The law of deflection growth does not show a linear relationship on semi-logarithmic paper, and the average strain is basically linearly distributed along the height of the section. Based on the results of this experiment, we have proposed calculations for the stiffness of unconfined prestressed fly ash ceramsite concrete beams;