Preparation and Construction Technology of Ultra-high Density and Large Volume Barite Concrete in Proton Therapy Area
To explore the preparation and construction technology of large-volume barite heavy-density anti-radiation concrete,taking the Proton Therapy Center Project of Xi'an International Medical Center Hospital as an example,the control principles of cement,aggregate,iron aggregate,admixture,coal fly ash,mineral powder and mixed water in the raw materials of ultra-high density barite concrete are established through the test of concrete mix proportion.Meanwhile,through the layered pouring and the layout design of construction joints,the structural construction process of large-volume and heavy-density radiation-resistant concrete is reasonably planned,and the temperature change curve of this kind of radiation-resistant concrete is obtained through the temperature monitoring method of concrete hydration heat in the later stage,which verifies the feasibility of the construction scheme.According to the on-site construction situation and experimental data,the raw material control measures of ultra-high density barite concrete and the design principle of concrete mix ratio were obtained,and the construction parameters and construction technology of such anti-radiation concrete and the corresponding concrete crack resistance maintenance measures were clarified.Through the temperature monitoring of mass concrete,the temperature variation characteristics of the hydration heat of such anti-radiation concrete were obtained,and the construction and maintenance experience of controlling hydration heat has been summarized.
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