论文部分内容阅读
混凝土在使用期间发主的体积变化是一项与结构物受力性能有关的因素,在严重的情况下也是混凝土溃坏和腐蚀的征兆。拌制混凝土时掺入氯盐,或者结构物长时间浸润在含氯盐介质中时,混凝土的体积变化都将发生各种不同的改变。这种影响应当得到人们的重视和研究。混凝土的体积变化是种种与介质干湿程度以及其中有害物质浓度有关的时间过程。测定混凝土体积变化的试验一般采用截面边长不小于10cm的棱柱体试件,往
The volume change of the initiator during use of the concrete is a factor related to the mechanical properties of the structure, and in severe cases it is also a sign of concrete collapse and corrosion. When concrete is mixed with chlorine salts, or when the structure is infiltrated in a chlorine salt medium for a long time, various changes will occur in the volume change of the concrete. This influence should be given people’s attention and research. The volume change of concrete is a time course related to the degree of dryness and humidity of the medium and the concentration of harmful substances therein. The test for determining the volume change of concrete generally uses prismatic specimens with a side length of not less than 10 cm.