Study on Mechanical and Shrinkage Characteristics of Reactive Powder Concrete
In this study,the effects of the amount of 3ultrafine silica powder on the mechanical properties and shrinkage characteristics of reac-tive powder concrete were systematically investigated from the aspects of compressive strength,flexural strength and drying shrinkage perform-ance of concrete.The experiment shows that 10%silica powder can significantly increase the compressive and flexographic strength of reactive powder concrete,and effectively slow down the growth of shrinkage strain.When the age is 90 days,the compressive strength of the concrete mixed with 10%ultrafine silica powder is increased by 8.81%,the flexural strength is increased by 7.59%,and the shrinkage rate is reduced by 11.27%compared with the concrete mixed with 0.
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