Research on key technology of mass concrete crack control in accelerator room of large hospital
LI Zhifeng
WANG Demin
XU Wei
ZHAO Wenbo
HAO Xuzhen
LIU Xinyao
CHENG Shunbo
Abstract：Based on the mass concrete project of accelerator room in a large hospital in Suzhou,under the condition of rea-sonable construction technology and maintenance measures,the crack control effect of shrinkage-compensating concrete technology prepared by calcium and magnesium oxides based expansive agent on concrete of solid structure was studied.The results show that the detemperature rate of side wall and roof mass concrete is 0.7℃/d～2.8℃/d within 7 days after the internal temperature of side wall and roof mass concrete reaches the peak value,and the cooling rate and temperature drop shrinkage are relatively small.The maximum micro-strain of the solid structure after temperature correction is 31 με～94 με,and slowly decreases to-127 με～-16 με within 28 days.The calcium and magnesium oxides based expansive agent compensates part of the shrinkage during the tempera-ture drop stage,which effectively improves the crack resistance of the concrete.
Keywords：accelerator roommass concretecrack controlshrinkage-compensatingcalcium and magnesium oxides based ex-pansive agentdetemperature rate
Publication Date：2025-07-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 26-30 )