RETRACTED: Study on the deterioration characteristics of aeolian sand concrete under the coupling effect of multiple factors in harsh environments.

stress (here is volume strain), as well as the current porosity of cement paste and ITZ; the research on the characteristics of ultrasonic wave velocity of concrete under the action of Ling Zhang [ 9 ] and other stresses points out that under the same loading conditions, the ultrasonic velocity has an increasing trend with the increase of age for C10 and C20 concrete samples, but for C30, C35, C40 and C45 concrete samples, the overall growth trend of velocity is not obvious; Guo Jun liu et al [ 10 ].

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