Research on Strength Characteristics of Salinized Cement Stabilized Macadam Base in Large Temperature Difference Regions
In order to study the influence of curing temperature and sulfate content on the strength characteristics of cement stabilized macadam materials in desert areas with large temperature differ-ences,based on the second phase of the S21 Urumqi-Altai Expressway project,combined with on-site research,the temperature and salt content of the cement stabilized macadam base were obtained,and the strength tests were carried out under the conditions of curing temperature of 10,20,30,40 ℃,and sulfate content of 0％,0.5％,1.0％,2.0％,respectively.And the hydration products and microstruc-ture of the specimens were analyzed.The results show that as the curing temperature increases,the hydration reaction rate of cement stabilized macadam material accelerates,and the amount of hydra-tion products such as calcium hydroxide and hydrated calcium silicate increases significantly.The strength performance of the specimens is enhanced.When the sulfate content in the mixture is 0.5％,the degradation effect on the strength performance of the specimen is weak.When the sulfate content reaches 1.0％,the amount of corrosion products such as ettringite increases significantly,and the strength performance of the specimen sharply decreases.
large temperature differencecuring temperaturesulfatestrength characteristics
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