Study on the Difference of Dry Shrinkage Deformation Behavior of Pavement Concrete Under Different Conditions
This paper mainly carried out experimental research on the difference of dry shrinkage deformation performance of pavement concrete under different conditions.The results show that curing conditions,water-cement ratio and age all affect the dry shrinkage deformation ability of concrete.When the water-cement ratio of condensate increases,the dry shrinkage rate increases;when the water-cement ratio is fixed,the dry shrinkage rate increases with the curing age,but the longer the curing age,the smaller the increase of dry shrinkage deformation.The dry shrinkage deformation of concrete at the curing age of 28 days and 180 days has reached 58%and 91%of the dry shrinkage deformation at the curing age of 540 days.Under fixed age conditions,the greater the water-cement ratio of concrete,the greater the dry shrinkage ratio.Appro-priate wet curing at the initial stage of pavement concrete curing can effectively alleviate the condition of dry shrinkage cracking.
Water-cement ratioConcreteDry shrinkage deformationCuring age
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