The mechanics characteristics of concrete affected by high temperature were probed in a systematic way, On the basis of the tests,the failure criterion of concrete subjected high temperature was established,The conclusions can provide theoretic basis for the design and analysis of concrete structures,...
After high temperature,such as a fire,reinforced concrete undergoes a series of changes in its mechanical properties such as compressive strength,tensile strength and bond strength between the steel and concrete.Mechanical properties of reinforcement and concrete and bond-anchorage properties of bars in ...
Experimental investigation on high temperature concrete using shockwave application The properties of concrete play an important role on the performance during its lifetime. Concrete generally provides subsequent fire resistance for most a... N Sumega,I Oviya,V Selvan - International Conference on Physi...
and the high temperature promotes the pozzolanic effect of silica fume; the mechanical strengths are therefore higher and the microstructures are denser than ambient cured UHPC. For UHPC, the shrinkage only occurs duringthe heat curing stage, and the heat curing process normally lasts for 48hours ...
The main objective of this research paper is to determine the current applications of ultra-high performance concrete (UHPC). A second objective is to determine the reason UHPC is used in various applications. More than 17 bridges in the United States have been built with UHPC components. A ha...
The fresh concrete was poured in the testing molds, vibrated to ensure proper filling, finished the top surface with a trowel, and left to set for 24 h. The samples are then demolded and cured in moist room with relative humidity of 95 % and ambient temperature of 20 ± 2 °C for te...
High temperatures can have significant effects on cement paste, which is the binding material in concrete. Understanding the effects of high temperature on cement paste is crucial for assessing the performance and durability of concrete structures exposed to fire or other elevated temperature environments...
(i.e., temperature and humidity). As a general rule, the ratio of the number of samples to the number of input variables should be of at least one order of magnitude86. Note that this is based on historical statistical models but may be insufficient for some of the most complex ML ...
The experimental results here presented are discussed in comparison to available literature data on high temperature heating of UHPC samples with reinforcement of PP and PP and steel (i. e. hybrid) fibres. Indications for the future developments are deduced. The use of PP and steel fibres is ...
enough to resist the mixing process, the high temperature, and all the years in road until the capsules are necessary. However, there are still some limitations restricting these capsules’ application. The main reason is that it is hard for rejuvenator flowing out from the porous sands when ...