冻融循环作用下岩石的损伤研究

处于不同环境下的岩石在经过不同类型的风化作用之后会呈现不同程度的破坏;而在高寒地区修建工程冻融破坏是不可忽视的灾害之一,所以对于高寒地区的岩石的物理力学性质的研究有重大的意义。将采自中巴公路的砂岩、花岗岩、千枚岩来模拟冻融循环下的岩石风化,经过不同次冻融循环,测量解冻后的质量、波速、干燥质量、饱水质量。结合X射线光粉晶衍射试验、波速变化、干燥质量变化、含水率变化等分析冻融循环对岩石内部矿物质的影响。实验结果表明随着冻融时间的延长,岩石的力学性质逐渐下降,岩石内部发生着矿物成分的转化,实验可以为寒区修建工程提供一定的依据。

The study of rock injured in Freeze-thaw cycles

it will show different types of varying degrees of damage when rock under different circumstances After weathering, more attention should be pay to the rock damage while construction engineering in the alpine region, it has a significant means to research the mechanical properties of the rocks in alpine region.The sandstone, granite, phyllite which collected from Pakistan highway to simulate rock weathering under freeze-thaw cycles. Measurement melted mass, velocity, dry mass, saturated water quality after different cycles. Binding X-ray powder diffraction test, wave velocity, drying quality, moisture content analysis of the physical and chemical properties of freeze-thaw cycles. As time goes by, the mechanism of the rocks get more worse,There are some transformation in rock mineral composition. This experiment can give some advice for construct buildings.