scholarly journals A PROPOSAL OF TEMPERATURE-TIME FUNCTION ON THE STRENGTH DEVELOPMENT OF CONCRETE UNDER SUB-ZERO TEMPERATURE

2009 ◽  
Vol 74 (640) ◽  
pp. 995-1003 ◽  
Author(s):  
Madoka TANIGUCHI ◽  
Osamu KATSURA ◽  
Yukio HAMA
Keyword(s):  
Time Function ◽  
Strength Development ◽  
Zero Temperature ◽  
Temperature Time

scholarly journals Maturity and Strength Development of Mortar with Antifreezing Admixture at Temperatures Lower than 0 °C

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3172
Author(s):  
Hyeonggil Choi ◽  
Yukio Hama ◽  
Madoka Taniguchi
Keyword(s):  
Blast Furnace Slag ◽  
Reaction Rate ◽  
Chemical Potential ◽  
Time Function ◽  
Effect Of Temperature ◽  
Strength Development ◽  
Type B ◽  
Potential Reduction ◽  
Temperature Time ◽  
Furnace Slag

This study investigated the effect of temperature and time at temperatures lower than 0 °C on mortar mixed with antifreezing admixture to determine the temperature–time function with the aim of expressing the effect universally. As a result, the maturity equation for temperatures lower than 0 °C proposed in previous studies was verified to be applicable to type-B blast furnace slag cement. The applicability of this equation at temperatures lower than 0 °C had not been investigated hitherto. The strength development attributable to the effect of the antifreezing admixture can be expressed as the reference temperature, and the reduction in the chemical potential of water chemical potential reduction was found to depend on the reaction rate. A new maturity equation for temperatures lower than 0 °C was proposed considering the effect of the antifreezing admixture.

On Fire Severity of Flammable Gas

2014 ◽  
Vol 580-583 ◽  
pp. 831-834
Author(s):  
Wen Zhong Wu
Keyword(s):  
Spontaneous Combustion ◽  
Fire Severity ◽  
Time Function ◽  
Premixed Combustion ◽  
Classification Theory ◽  
Flammable Gas ◽  
Fire Scenarios ◽  
Protection Technology ◽  
Definition Of ◽  
Temperature Time

Flammable gases’s fire need more attention in spontaneous combustion study of coalmine. Their premixed combustion is modeled to deduce the corresponding temperature-time function. Basing on this function curve and Simon Ingberg’s early reports, their fire severity classification theory is established, including definition and equation of their fire severity, and definition of fire severity coefficient along with calculation of those coefficients of ordinary flammable gases. Applying this theory to a certain coalmine, calculate and audit fire severity of its 6 designed fire scenarios, in servitude to guidelines for fire protection technology there, and references for fire severity comparison among similar coalmines.

The temperature-time function of the mechanical strength and ageing of polyethylene

1969 ◽  
Vol 11 (6) ◽  
pp. 1467-1474 ◽  
Author(s):  
M.A. Natov ◽  
St.V. Vasil'eva ◽  
Vl.St. Kabaivanov
Keyword(s):  
Mechanical Strength ◽  
Time Function ◽  
Temperature Time

Research on the Strength Properties of the Magnesium Phosphate Cement (MPC) under the Sub-Zero Temperature Environment

2010 ◽  
Vol 150-151 ◽  
pp. 1517-1520
Author(s):  
Hong Tao Wang ◽  
Ming Xue ◽  
Ju Hui Cao
Keyword(s):  
Compressive Strength ◽  
Strength Properties ◽  
Magnesium Phosphate ◽  
Strength Development ◽  
Zero Temperature ◽  
Cement Ratio ◽  
Temperature Environment ◽  
Main Factors ◽  
Early Strength ◽  
Mixing Water

In this paper, the strength characteristics of magnesium phosphate cement (MPC) under the sub-zero temperature environment had been researched, the main factors of the strength development had been analyzed. The results show that: the MPC has high early strength under the sub-zero temperature environment, but the compressive strength dropped as the temperature decreased. The way of pre-curing the MPC for 30min at 20 could improve the strength of the MPC significantly. The strength of the MPC is influenced greatly by water-cement ratio under the sub-zero temperature environment, and the amount of the mixing water should be controlled strictly.

Spiritual transformation and character strength development

2008 ◽  
Author(s):  
Sarah A. Schnitker ◽  
Justin L. Barrett ◽  
Robert A. Emmons
Keyword(s):  
Spiritual Transformation ◽  
Strength Development ◽  
Character Strength
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