Computational of Temperature and Stresses for Mujib Dam

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Journal HP 2004 Malakwi

Heat of Hydration

Heat of hydration of cementitious materials is the main reason for increasing

the temperature in the massive concrete structure. For Jordanian OPC used in Mujib

Dam, based on the results of several tests performed in the Civil Engineering

laboratory at Jordan University of Science ad Technology the heat of hydration was

obtained as a function of time and was found to be about 320 J/g at 28 days. Due to

the different cement contents, the input of heat of hydration in ANSYS program is not

the same for the RCC as that for the CVC at the Mujib dam.

Figure 6 shows the heat of hydration as a function of time used in the ANSYS

program for RCC and CVC simulated as a ramp input. Figure 7 shows the prediction

of adiabatic temperature rise for RCC using the input data from Figure 6. The

maximum RCC temperature is approximately 36

C for a placement temperature of 21

C. It agrees with typical values for adiabatic temperature rise of mass concrete

ranging from 11 to 19

C at 5 days to 17 to 25

C at 28 days (U.S. Army Crops of

Engineers, Engineer Technical Letter (ETL) 1110-2-542, 1997).

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