Concrete at high temperatures above 1000/spl deg/C

Chang,; Giang,; Wang, Hong; Huang, Biao

doi:10.1109/ccst.1993.386790

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Document [10] points out that at temperature close to 900℃, calcium carbonate in the concrete begins to decompose, and dehydration of free water, crystal water and hydrate is almost completed, resulting in crisp crack damage of concrete, and the compressive strength is close to zero, therefore take melting temperatur m T of concrete material as 1273K (1000℃) and reference temperature r T (room temperature is 16℃ in tests) as 289K. Based on the test data of concrete under high-temperature dynamic conditions, temperature weakening effect coefficient fitting is conducted at various impact velocity, then m = 1.5, temperature softening effect…”

Section: Advanced Materials Research Vols 228-229 305mentioning

confidence: 99%

Mechanical Behavior and Constitutive Equation of Concrete under High-Temperature Dynamical Conditions

Jia

Tao

et al. 2011

AMR

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SPHB tests of concrete under different temperatures and various loading conditions are completed, and high-temperature dynamical behavior of concrete is obtained. Dynamical mechanical behavior of concrete with high temperature is affected by not only the strain rate effect, but also the high temperature weakening effect, and the strain rate hardening effect is coupled with high temperature weakening effect, but the latter has greater influence. Concrete failure evolution is described on basis of the damage factor, the intercoupling strain rate hardening effect and temperature weakening effect are simply set as mutually independent factors, each parameter is respectively fitted with test data, finally, concrete constitutive equation under high-temperature dynamical conditions is established, and comparative analysis with test data are conducted, indicating good coincidence with test results.

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Section: Advanced Materials Research Vols 228-229 305mentioning

confidence: 99%

Mechanical Behavior and Constitutive Equation of Concrete under High-Temperature Dynamical Conditions

Jia

Tao

et al. 2011

AMR

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Transport Properties of Fire-Exposed Concrete

Vichit-Vadakan

Kerr

2009

ACT

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Concrete has a good reputation for fire resistance because it has low thermal conductivity and is non-combustible. However, concrete loses strength when exposed to elevated temperatures as a result of damage to the pore structure and chemical degradation of the calcium silicate hydrate. Reports on strength loss due to fire exposure are ubiquitous in the literature. However, there have been limited reports on the changes in the pore structure, which greatly affects the durability of the concrete. In cases where the strength is sufficient for the structural element to remain in service, other considerations, such as the durability of the structural element comes into play. The ingress of aggressive agents is typically through means, such as water, which leads to sorptivity being a particular important transport property of the degraded concrete. The sorptivity of the concrete will depend on the age of the sample at the time of damage, the cement content, w/c of the original mix design, as well as the length of time the damaged concrete has been re-exposed to water. These properties are reported along with mechanical properties to better demonstrate the complexity in the relationship between transport properties and strength. Furthermore, sorptivity can become crucial to predicting long term durability as well as identifying potential repair mechanisms.

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Concrete at high temperatures above 1000/spl deg/C

Cited by 2 publications

References 3 publications

Mechanical Behavior and Constitutive Equation of Concrete under High-Temperature Dynamical Conditions

Mechanical Behavior and Constitutive Equation of Concrete under High-Temperature Dynamical Conditions

Transport Properties of Fire-Exposed Concrete

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