约束状态下成型的混凝土渗透性的研究

本文应用板武混凝土早期收缩开裂试验架成型约束状态的混凝土大板，并在大板的中心位置、对角线位置和十字区域取芯制取试件。结合ASTMC1202快速氯离子渗透法和CH2C12浸泡法评价了试件的渗透性。阐述了约束状态下混凝土渗透性规律及影响因素。通过布置光纤光栅传感器测得了约束状态下混凝土的收缩应变及其分布情况，结合渗透性结果研究了约束状态下混凝土的早期收缩开裂对混凝土渗透性的影响机理。

Permeability of concrete in restrained condition

Concrete plates under restrained condition were prepared using special plate molds and specimens drilled in the central position, diagonal position and crisscross position of the concrete plates. The permeability of the specimens were evaluated using the rapid chloride ion penetration test in ASTMC1202 and dichloromethane immersion test. The regularity and influencing factors of the permeability of concrete under restrained condition were indicated. The strain distribution in volume of plate specimen in restrained condition was determined through optical fiber sensors. The mechanism of the effect of shrinkage cracking of concrete at early age in restrained condition on the permeability was studied by combining the measured strain distribution and the results of the permeability test.