Concrete frostbiting is the important factor that influence the concrete structure endurance. To ensure the endurance of some important project, more and more importance is attached to the concrete freezing resistance.

混凝土的凍害是影響混凝土結(jié)構(gòu)耐久性的重要因素，為了保證一些重大工程的耐久性国产一级做，混凝土的抗凍性已經(jīng)越來(lái)越引起人們的重視久久综合老熟女中文字幕。

At present there are mostly Hydrostatic Pressure Theory and Penetrative Pressure Theory with regard to concrete frostbiting principle after setting. But they are not the last word, because the pressure can not be measured directly or calculated exactly. The two theories can triumphantly explain much phenomenon about concrete in the freeze-thaw process.

混凝土硬化后的凍害機(jī)理目前主要有靜水壓學(xué)說(shuō)和滲透壓學(xué)說(shuō)www.bjct-laser.com，由于不能直接測(cè)定或進(jìn)行準(zhǔn)確計(jì)算人人摸,人人看，所以還沒(méi)有定論，但它們可以成功地解釋混凝土凍融過(guò)程中的很多現(xiàn)象新超碰免费男人网站。

frostbiting：駕滑冰船

frostbiter 賽艇 | frostbiting 駕滑冰船 | frostbitten 受霜害的