An Experimental Study on Compressive Strength Properties of High Temperature Curing Method of High-strength Concrete

2014 ◽  
Vol 30 (10) ◽  
pp. 29-36
Author(s):  
Han-Yong Lee ◽  
Kyung-Yong Nam ◽  
Jung-Soo Ha ◽  
Nam-Gi Lim
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
High Temperature ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Properties ◽  
Strength Concrete ◽  
Curing Method

High-Temperature Compressive Strength of Steel Fiber High-Strength Concrete

2001 ◽  
Vol 13 (3) ◽  
pp. 230-234 ◽  
Author(s):  
Maria de Lurdes B. C. Reis ◽  
I. Cabrita Neves ◽  
A. J. B. Tadeu ◽  
João Paulo C. Rodrigues
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
High Strength ◽  
Strength Concrete ◽  
High Temperature Compressive Strength

scholarly journals Strength Properties of High-Strength Concrete Containing Coal Bottom Ash as a Replacement of Aggregates

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
In-Hwan Yang ◽  
Jihun Park ◽  
Nhien Dinh Le ◽  
Sanghwa Jung
Keyword(s):  
Compressive Strength ◽  
High Strength Concrete ◽  
Bottom Ash ◽  
High Strength ◽  
Ultrasonic Pulse Velocity ◽  
Strength Properties ◽  
Pulse Velocity ◽  
Coal Bottom Ash ◽  
Strength Concrete ◽  
Fine Aggregates

Most previous studies on the strength properties of coal bottom ash (CBA) concrete have focused on concrete with a normal compressive strength, and thus, studies on the strength properties of high-strength concrete (HSC) containing CBA are limited. Therefore, the effects of replacing fine aggregates with CBA and variations in the curing age on the strength properties of HSC with a compressive strength of greater than 60 MPa were investigated in this study. The different CBA contents included 25, 50, 75, and 100%, and the different curing ages were 28 and 56 days. The mechanical properties of the HSC with CBA incorporated as fine aggregates were examined. The experimental results revealed that CBA could be partially or totally substituted for fine aggregates during HSC production. The test results also showed that the compressive, splitting tensile, and flexural strengths of the HSC containing CBA fine aggregates slightly decreased as the CBA content increased. Moreover, useful relationships between the compressive strength, splitting tensile strength, and flexural strength were suggested, and the predictions reasonably agreed with the measurements. Compared to those of the control specimen, the pulse velocities of the HSC specimens at various CBA contents decreased by less than 3%. In addition, equations for predicting the strength values of CBA concrete by using the ultrasonic pulse velocity were suggested.

scholarly journals Reduction of Postfire Properties of High-Strength Concrete

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Neno Torić ◽  
Ivica Boko ◽  
Bernardin Peroš
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
High Temperature ◽  
Ambient Temperature ◽  
Modulus Of Elasticity ◽  
High Strength Concrete ◽  
High Strength ◽  
Maximum Temperature ◽  
Secant Modulus ◽  
Strength Concrete

This paper presents an experimental study of behaviour of high-strength concrete at high temperature. Reduction of the mechanical properties of concrete was determined starting from the period when the concrete specimens were heated to the maximum temperature and cooled down to ambient temperature and the additional 96 hours after the initial cooling of the specimens. The study includes determination of compressive strength, dynamic and secant modulus of elasticity, and stress-strain curves of concrete specimens when exposed to temperature level up to 600°C. The study results were compared with those obtained from other studies, EN 1994-1-2 and EN 1992-1-2. Tests point to the fact that compressive strength of concrete continues to reduce rapidly 96 hours after cooling of the specimens to ambient temperature; therefore indicating that the mechanical properties of concrete have substantial reduction after being exposed to high temperature. The study of the dynamic and secant modulus of elasticity shows that both of the properties are reduced but remain constant during the period of 96 hours after cooling. The level of postfire reduction of compressive strength of the analyzed concrete is substantial and could significantly affect the postfire load bearing capacity of a structure.

scholarly journals Residual Compressive Strength of High-Strength Concrete Exposed to Elevated Temperatures

2019 ◽  
Vol 2019 ◽  
pp. 1-22 ◽  
Author(s):  
Hussein M. Elsanadedy
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
High Strength Concrete ◽  
Elevated Temperatures ◽  
High Strength ◽  
Strength Concrete ◽  
Residual Properties ◽  
Binder Ratio ◽  
Strength In Compression ◽  
Normal Strength

High-strength concrete (HSC) has several well-known technical, aesthetic, and economic advantages over normal-strength concrete (NSC), which explains the increasing popularity of the former material in the construction domain. As in the case of NSC, however, high temperature adversely affects HSC mechanical properties even more than in NSC, as indicated by the many studies performed so far on HSC at high temperature (hot properties) or past a thermal cycle at high temperature (residual properties). Since many code provisions concerning concrete properties versus high temperature were developed for ordinary concrete and the available models (in terms of stress-strain relationship) come mostly from the tests on NSC—as the tests on HSC are less numerous—developing predictive relationships for HSC exposed to high temperature is still an open issue, especially with reference to many parameters affecting concrete compressive strength, like temperature as such, heating rate, water-to-binder ratio, and strength in compression, to cite the most relevant parameters. To this purpose, a large database (more than 600 tests) is examined in this paper, which is focused on HSC residual properties and on the variables affecting its residual strength. Available design models from various guidelines, standards, codes, and technical reports are tested against the database, and new regression-based models and design formulae are proposed for HSC strength in compression, after the exposure to high temperature.

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