MgO混凝土自生体积变形过程线优化研究

Optimization of Autogenous Volume Deformation Process Curve of MgO Concrete

MgO微膨胀混凝土由于自生体积变形具有良好的延迟性而被工程界广泛应用,其膨胀量、膨胀时间、膨胀速率以及膨胀过程线的形态对补偿收缩的效果起着十分关键作用。通过对MgO混凝土自生体积变形的模型参数进行优化从而得到变形过程的最优曲线,达到了进一步降低拉应力的效果,为微膨胀混凝土材料的研制提供了一条目标曲线。还对自生体积变形过程线优化的初始可行点的选取进行了探讨。

MgO micro-expansionary concrete finds a wide application in the engineering field due to the good retarding effect of the autogenous volume deformation. The volume, time, speed and the shape of the process curve of expansion have important influence on the effects of shrink retrieve. The optimal deformation process curve is derived through optimization of the model parameters of autogenous volume deformation of MgO concrete in order to reach the effect of decreasing the pulling stress. Thus, the study provides an objective curve for the development of micro-expansionary concrete. The selection of initial feasible points for the autogenous volume deformation process curve is also discussed.