scholarly journals Development of high performance adiabatic temperature rise Measuring system for long-term measurement.

Netsu Bussei ◽  
2009 ◽  
Vol 23 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Seiichi Hagiwara ◽  
Etsuo Sakai ◽  
Hiroshi Sato ◽  
Kiyoshi Asaga
Keyword(s):  
Temperature Rise ◽  
High Performance ◽  
Adiabatic Temperature ◽  
Measuring System ◽  
Adiabatic Temperature Rise ◽  
Long Term Measurement

scholarly journals Effects of Steel Slag Powder and Expansive Agent on the Properties of Ultra-High Performance Concrete (UHPC): Based on a Case Study

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 683
Author(s):  
Shunkai Li ◽  
Shukai Cheng ◽  
Liwu Mo ◽  
Min Deng
Keyword(s):  
Temperature Rise ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
Adiabatic Temperature ◽  
Hydration Heat ◽  
Ultra High Performance Concrete ◽  
Adiabatic Temperature Rise ◽  
Slag Powder ◽  
Steel Slag Powder

In view of the performance requirements of mass ultra-high performance concrete (UHPC) for the Pang Gong bridge steel cable tower in China, the UHPC incorporating of steel slag powder and hybrid expansive agents is optimized and prepared. The effects of steel slag powder and hybrid expansive agents on the hydration characteristics and persistent shrinkage of UHPC are investigated. The results indicate that 15 wt.% steel slag powder and 5 wt.% hybrid expansive agents can effectively reduce the drying shrinkage deformation of UHPC with a slight decrease of strength. Heat flow calorimetry results show that the incorporation of steel slag powder and expansive agents decreases the hydration heat at three days. Moreover, the obtained adiabatic temperature rise of UHPC is 59.5 °C and the total shrinkage value at 180 days is 286 με. The hydration heat release changes of large volume UHPC in the steel-concrete section of cable tower is agreed with the result of adiabatic temperature rise in the laboratory.

scholarly journals Effects of Different Content of Phosphorus Slag Composite Concrete: Heat Evolution, Sulphate-Corrosion Resistance and Volume Deformation

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1293
Author(s):  
Kuisheng Liu ◽  
Yong Cui
Keyword(s):  
Temperature Rise ◽  
Control Sample ◽  
Drying Shrinkage ◽  
Strength Loss ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Rise ◽  
Binder Ratio ◽  
L 22 ◽  
Water Binder Ratio

Phosphorus slag (PS) and limestone (LS) composite (PLC) were prepared with a mass ratio of 1:1. The effects of the content of PLC and the water/binder ratio on the mechanical properties, durability and dry shrinkage of concrete were studied via compressive strength, electric flux, sulfate dry/wet cycle method, saturated drainage method, isothermal calorimeter, adiabatic temperature rise instrument and shrinkage deformation instrument. The results show that PLC can greatly reduce the adiabatic temperature rise of concrete. The adiabatic temperature rise is 55 °C with 33 wt.% PLC, 10 °C lower than that of the control sample. The addition in the content of PLC does not affect the long-term strength of concrete. When the water/binder ratio decreases by 0.1–0.15, the long-term strength of concrete with PLC increases by about 10%, compared with the control group. At the age of 360 days, the chloride permeability of L-11 (i.e., the content of PLC was 20%, the water/binder ratio was 0.418) and L-22 (i.e., the content of PLC was 33%, the water/binder ratio was 0.39) decrease to the “very low” grade. The strength loss rate of L-11 and L-22 after 150 sulfate dry/wet cycles is about 18.5% and 19%, respectively, which is 60% of the strength loss rate of the control sample. The drying shrinkage of L-11 and L-22 reduces by 4.7% and 9.5%, respectively, indicating that PLC can also reduce the drying shrinkage.

Effect of Slag Characteristics on Adiabatic Temperature Rise of Blended Concrete

2022 ◽  
Author(s):  
Hai Zhu ◽  
Dhanushika Gunatilake Mapa ◽  
Catherine Lucero ◽  
Kyle A. Riding ◽  
A. Zayed
Keyword(s):  
Temperature Rise ◽  
Adiabatic Temperature ◽  
Adiabatic Temperature Rise

Kinetic Model of Adiabatic Temperature Rise of Mass Concrete

2021 ◽  
Vol 13 (5) ◽  
pp. 771-780
Author(s):  
Shou-Kai Chen ◽  
Bo-Wen Xu
Keyword(s):  
Temperature Field ◽  
Temperature Rise ◽  
Initial Conditions ◽  
Dynamic Change ◽  
Adiabatic Temperature ◽  
Model Parameters ◽  
Hydration Reaction ◽  
Mass Concrete ◽  
Adiabatic Temperature Rise ◽  
Proposed Model

The adiabatic temperature rise model of mass concrete is very important for temperature field simulation, same to crack resistance capacity and temperature control of concrete structures. In this research, a thermal kinetics analysis was performed to study the exothermic hydration reaction process of concrete, and an adiabatic temperature rise model was proposed. The proposed model considers influencing factors, including initial temperature, temperature history, activation energy, and the completion degree of adiabatic temperature rise and is theoretically mature and definitive in physical meaning. It was performed on different initial temperatures for adiabatic temperature rise test; the data were employed in a regression analysis of the model parameters and initial conditions. The same function was applied to describe the dynamic change of the adiabatic temperature rise rates for different initial temperatures and different temperature changing processes and subsequently employed in a finite element analysis of the concrete temperature field. The test results indicated that the proposed model adequately fits the data of the adiabatic temperature rise test, which included different initial temperatures, and accurately predicts the changing pattern of adiabatic temperature rise of concrete at different initial temperatures. Compared with the results using the traditional age-based adiabatic temperature rise model, the results of a calculation example revealed that the simulated calculation results using the proposed model can accurately reflect the temperature change pattern of concrete in heat dissipation conditions.

scholarly journals Convenient Evaluation Method of Adiabatic Temperature Rise using Mortar Sample

2010 ◽  
Vol 48 (12) ◽  
pp. 15-22
Author(s):  
E. Maruya ◽  
H. Misumi ◽  
T. Takahashi ◽  
E. Sakai
Keyword(s):  
Temperature Rise ◽  
Evaluation Method ◽  
Adiabatic Temperature ◽  
Mortar Sample ◽  
Adiabatic Temperature Rise
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