high strength concrete at high temperature an overview

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  • Phan LT, Carino NJ (2003) Code provisions for high strength concrete strength-temperature relationship at elevated temperatures. Mater Struct 36(2):91–98 Article Google Scholar 9. Kodur V, Mcgrath R (2003) Fire

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  • 2002/01/01· Request PDF High-Strength Concrete at High Temperature − An Overview This paper presents results of NIST's experimental program on the effects of elevated temperature

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  • High-Strength Concrete at High Temperature An Overview 2 however, has been observed inconsistently, and there is not a complete understanding of the factors that control explosive spalling in HSC. The general feeling is that its

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  • This paper includes a compilation of materials that are expected to have high strength at high temperatures. A list of 235 single-phase materials with melting (or dissociation) temperatures (Tm) that are 2000°C or aboue and a supplementary list of 140 metals and intermetallic compounds with Tm between 1500°C and 2000°C, have been assembled. Based on the simple, structure-insensitive

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  • Stress-Strain Curves of High Strength Concrete at Heightened Temperatures Abstract—the stress-strain curve of High Strength Concrete (HSC) depends on temperature conditions. Elevated temperatures affect the strength, ductility, elastic modulus and brittleness of concrete. A study will be conducted to investigate the effect of elevated temperatures on the stress

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  • become widely available and is referred to as high-strength concrete (HSC). When compressive strength exceeds MPa, it is o en referred to as ultrahigh performance concrete (UHP). e strength of concrete degrades with in uenced

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  • A very high-strength microconcrete (f c = 125 MPa) containing polymeric fibers and quartzitic aggregates, but no silica fume, has been investigated both at high temperature and after cooling, in order to evaluate the thermal diffusivity and the mechanical decay as a function of the temperature, since there is still scanty information in the literature on the high-temperature behavior

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  • 1999/12/01· High temperatures also affect the compressive strength of concrete. Above 212º F, the cement paste begins to dehydrate (loses chemically combined water of hydration), which gradually weakens the paste and paste-aggregate bond. The temperature that concrete has reached often can be determined by observing color changes in the aggregate.

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  • This paper includes a compilation of materials that are expected to have high strength at high temperatures. A list of 235 single-phase materials with melting (or dissociation) temperatures (Tm) that are 2000°C or aboue and a supplementary list of 140 metals and intermetallic compounds with Tm between 1500°C and 2000°C, have been assembled. Based on the simple, structure-insensitive

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  • 2001/03/01· The specimens were heated to a maximum core temperature of 600 degrees C, at a heating rate of 5 degrees C/min. Experimental results indicate that HSC with lower w/cm and with silica fume retain more residual strength after elevated temperature exposure than those with higher w/cm and without silica fume.

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  • The surface textures of concrete specimens exposed to high temperatures are illustrated in Figure 1. There was no visible effect on the surface of the specimens heated up to 400 C. The concrete started to crack when the temperature reached to 600 C, but the effect was not significant at that temperature level.

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  • 1973/02/04· Experiment on the Mechanical Behaviors of High Strength Steel Reinforced Concrete Beam at High Temperature in Fire Yunchun Xia School of Civil Engineering, Anhui Jianzhu University, No.856, Rd. Jinzhai South

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  • This paper includes a compilation of materials that are expected to have high strength at high temperatures. A list of 235 single-phase materials with melting (or dissociation) temperatures (Tm) that are 2000°C or aboue and a supplementary list of 140 metals and intermetallic compounds with Tm between 1500°C and 2000°C, have been assembled. Based on the simple, structure-insensitive

    MORE
  • This paper presents results of NIST's experimental program on the effects of elevated temperature exposure on the mechanical properties and potential for explosive spalling of high strength concrete (HSC). Mechanical properties of HSC were measured by heating 100 x 200 mm cylinders at 5 °C/min to temperatures of up to 600 °C, and heat-induced pore pressure buildup was measured by heating

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  • strength concrete (NSC, according to the current ACI definition [2]). Thus, in light of the results of recent studies, which have shown that high-strength concrete (HSC) behavior at elevated temperature may be significantly different

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  • Baker, in 1996, conducted a study in normal strength concrete with W/C of 0.5 where the effect of exposure to high temperatures on the fracture energy of normal concrete was studied. Baker concluded that the fracture energy increases with the temperature up to 300 °C but for temperatures higher than this one there is a rapid decrease [16] .

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  • high-strength concrete after exposure to high temperatures", Cement and Concrete Composites, Vol. 30, pp. 106–112. Castillo, C. and Durrani, A.J. 1990. "Effect of transient high temperature on high-strength concrete",ACI

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  • 2011/10/01· In this study, the effect of temperature on compressive strength, spalling and mass loss of High Strength Concretes (HSCs) by f c ′ > 65 MPa is discussed. Average compressive strength of the HSCs was from 65 to 93 MPa, which was optimized by Taguchi's method as a powerful tool for optimizing the performance characteristic of a product/process.

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  • 2001/03/01· Abstract. This report describes results of NIST's experimental program that focuses on effects of elevated temperature exposure on mechanical properties of hing strength concrete (HSC). Mechanical properties were measured by heating, with and without preload, the 102 mm x 204 mm HSC cylinders to steady state thermal conditions at a target

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  • Study on concrete at high temperature in China—an overview Fire Saf. J., 39 (1) (2004), pp. 89-103, 10.1016/S0379-7112(03)00093-6 Article Download PDF View Record in Scopus Google Scholar Eurocode 2 Actions on (2004) ()

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  • 2004/02/01· From Table 1, it can be noted that in China, concrete of grade C25–C85, i.e. from normal strength concrete (NSC) to high strength concrete (HSC) and high performance concrete (HPC), has been tested at high temperature.

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  • By using an electrohydraulic servo fatigue testing machine, fatigue tests were performed on C60 high strength concrete (HSC) under low cyclic compressive loading after undergoing normal temperature, 200°C, 400°C, 600°C, and 800°C. Failure patterns of high strength concrete under low cyclic compressive loading were observed. The influence of the high temperature

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  • This paper presents results of NIST's experimental program on the effects of elevated temperature exposure on the mechanical properties and potential for explosive spalling of high strength concrete (HSC). Mechanical properties of HSC were measured by heating 100 x 200 mm cylinders at 5 °C/min to temperatures of up to 600 °C, and heat-induced pore pressure buildup was measured by heating

    MORE
  • 1999/12/01· High temperatures also affect the compressive strength of concrete. Above 212º F, the cement paste begins to dehydrate (loses chemically combined water of hydration), which gradually weakens the paste and paste-aggregate bond. The temperature that concrete has reached often can be determined by observing color changes in the aggregate.

    MORE
  • 2020/04/09· High strength concrete is a useful material for high-rise buildings, long-span bridges, heavy-duty industrial floors, pre-stressed concrete, etc. Concrete is a mixture of cement, water, coarse and fine aggregates with or without chemical and mineral admixtures.

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  • High-Strength Concrete at High Temperature An Overview 2 however, has been observed inconsistently, and there is not a complete understanding of the factors that control explosive spalling in HSC. The general feeling is that its

    MORE
  • 2002/01/01· Request PDF High-Strength Concrete at High Temperature − An Overview This paper presents results of NIST's experimental program on the effects of elevated temperature

    MORE
  • Ahmad, G.N.,Hurst, J.P. : An analytical approach for investigating the causes of spalling of high-strength concrete at high-temperatures: in Proceedings of International Workshop on Fire Performance of High-Strength Concrete,

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  • 2002/06/01· High-Strength Concrete at High Temperature An Overview Published June 1, 2002 Author(s) Long T. Phan Abstract This paper presents results of NIST's experimental program on the effects of elevated temperature exposure on

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  • 2004/02/01· First, the basic mechanical behavior of concrete at high temperature, including strength, elastic modulus, peak strain and Poisson's ratio. Second, the effect of high temperature on the yield strength and elastic modulus of rebar. And last but not the least, the high temperature response to the bond behavior between concrete and rebar.

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  • High-strength concrete, independent of the binder material type used, experienced weight loss and the relationship between the weight loss and maximum temperature was non-linear. Compressive and tensile strengths showed noticeable losses (above 15%) even at the temperature of 200oC, however the elastic modulus dropped marginally by about 5%.

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  • Mechanical Properties of Concrete depending on Cooling Conditions After High Temperature Heating Gyu Yong Kim 1),Gyeong Choel Choe 1),Yeon Woo Kang 2),Tae Gyu Lee 1) 1) Chungnam National University, Daejeon, Korea.

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  • 2002/07/01· With the increasing use of high-strength concrete (fc > 60 MPa) in building construction, the risk of exposing these structures to high temperatures during a fi Title: Effect of High Temperature on Residual Mechanical Properties of Confined and Unconfined High-Strength Concrete

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  • Researchers have suggested that spalling in high strength concretes can be mitigated by adding polypropylene fibres to the concrete composition,. The polypropylene fibres will sublime for temperatures of about 160–170 °C, creating micro-pores in the concrete matrix sufficient for water vapour realising to outside.

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  • EXTENSION OF CP65 FOR HIGH STRENGTH CONCRETE 14 2.1 Overview of Changes to CP65 14 2.2 Changes to CP65 : Part 1 : 1999 14 Clause 2.5.3 Analysis of sections for the ultimate limit state Clause 3.4.4.2 Design

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  • high-temperature in the concrete, in terms of significant losses of resistance and durability, is the application of UPV tests with the purpose to evaluate the deterioration state of material after the accident.

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  • strength concrete (NSC, according to the current ACI definition [2]). Thus, in light of the results of recent studies, which have shown that high-strength concrete (HSC) behavior at elevated temperature may be significantly different

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  • T1 High Strength Polypropylene Fibre Reinforcement Concrete at High Temperature AU Aslani, Farhad AU Samali, B. PY 2014 Y1 2014 N2 Concrete is an inherently brittle material with a relatively low tensile strength

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  • The surface textures of concrete specimens exposed to high temperatures are illustrated in Figure 1. There was no visible effect on the surface of the specimens heated up to 400 C. The concrete started to crack when the temperature reached to 600 C, but the effect was not significant at that temperature level.

    MORE
  • 2002/06/01· High-Strength Concrete at High Temperature An Overview Published June 1, 2002 Author(s) Long T. Phan Abstract This paper presents results of NIST's experimental program on the effects of elevated temperature exposure on

    MORE
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