In this paper,a multifunctional environment simulation maintenance box has been used to simulate complex environments such as high winds,dryness,and large temperature differences on high-altitude railways.A comparative analysis was conducted on the development laws of mechanical properties and drying shrinkage of railway specific low-heat Portland cement and ordinary Portland cement in different complex environments.In complex environments,the advantage of high strength of low-heat Portland cement in the later age cannot be reflected due to severe water loss,but pre curing for 7～14 days can effectively alleviate or even avoid this phenomenon.Even in complex environments,the low-heat Portland cement still has lower drying shrinkage,with drying shrinkage rates of 30％～40％lower than ordinary Portland cement at all ages.
维普
万方数据