Compressive strength–color change relation in mortars at high temperature

Yüzer, Nabi; Aköz, Fevziye; Öztürk, Leyla

doi:10.1016/j.cemconres.2004.01.015

Cited by 164 publications

(99 citation statements)

References 6 publications

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“…Yuzer et al studied compressive strength-colour change relation in mortars at high temperatures. They observed that the hue of colour changed a little from yellow into greenish yellow when the temperature rose from 20 to 600 • C, it was yellow at 600 • C and it became reddish yellow when the temperature increased from 600 to 1200 • C [18].…”

Section: Visual Inspectionsmentioning

confidence: 99%

“…The integrity and load-bearing capacity of the structure may be imperilled. Furthermore, the explosive thermal spalling of concrete during fire occurs mostly without advance notice [9,10,18,24]. It should also be noted that the presence of loading during heating influences the strength of concrete since the failure mode is generally thermal spalling when concrete is exposed to high temperature [25].…”

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confidence: 99%

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Retained properties of concrete exposed to high temperatures: Size effect

Arıöz

2009

Fire and Materials

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SUMMARYConcrete as a construction material is likely exposed to high temperatures during fire. The retained properties of concrete after such exposures are still of great importance in terms of the serviceability of structures. This paper presents the effects of high temperatures on the physical, mechanical, and microstructural properties of concrete. Specimens with different sizes were exposed to high temperatures ranging from 200 to 1200 • C. The compressive strength, splitting tensile strength, ultrasonic pulse velocity, and rebound numbers of the specimens were determined. The microstructures of the specimens were examined by scanning electron microscope (SEM) analyses. The test results indicated that the retained compressive strength of concrete considerably decreased with increase in temperature. The effect of specimen size on the retained compressive strength was not pronounced. The retained splitting tensile strength of concrete remarkably reduced as the temperature was increased. The specimen size played an important role on the retained splitting tensile strength of concrete up to 400 • C. The test results revealed that ultrasonic pulse velocity (UPV) test can be successfully used in order to check the uniformity of fire-damaged structures. The rebound numbers decreased with increase in exposure temperature. SEM studies on specimens exposed to 800 • C revealed significant changes in the microstructure of the concrete.

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Section: Visual Inspectionsmentioning

confidence: 99%

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confidence: 99%

Retained properties of concrete exposed to high temperatures: Size effect

Arıöz

2009

Fire and Materials

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“…The pore structure and the mechanical properties of normal strength and high strength concrete as well as the permeability of the concrete exposed to high temperature were investigated [30,31]. Another study examined the changes in pressure and colour of the concrete exposed to high temperatures [32].…”

Section: Introductionmentioning

confidence: 99%

The Investigation of Heat Performance and Thermal Conductivity of Different Wall Materials at High Temperatures

Görhan

Kürklü

2018

SDÜ Fen Bil Enst Der

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Abstract:The current study investigated heat transfers at high temperatures and compressive strength after exposure to high temperatures of gas concrete, clay brick, rice husk bricks used as wall materials, and gypsum plaster and common plaster used as coating materials. Tests measuring apparent porosity, water absorption, bulk density and compressive strength were performed on the samples prepared in 100 mm x 100 mm x 100 mm size. In the high-temperature experiment, the samples with K-type NiCr-Ni thermocouple were placed in a specially designed laboratory furnace. The internal temperature of the furnace was set at 800 o C. The researchers found that out of the samples exposed to high temperatures compressive strength and thermal conductivity of the gypsum plaster mortar were better than those of the common plaster mortar. Furthermore, the gas concrete, a wall material, was found to have a low thermal conductivity. As a result, the gas concrete and common plaster mortar, which were exposed to high temperature, were found to be more durable than other materials and, therefore, more advantageous when used in construction.

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“…In the critical cases the high temperature effect also plays an important role, since concrete exposed to the high temperatures loses significantly its strength [7,8]. When construction materials are heated to 1200…”

Section: Introductionmentioning

confidence: 99%

Influence of High Temperature on Concrete Produced from Portland Cement with Boron Additives

2017

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The boron compounds have been widely used as additives in the production of cement and concrete to enhance their engineering properties. In this study, three series of concrete specimens were produced using B2O3 additive materials, boron modified active belite cement and Portland cement. After 28 days of curing period the specimens were exposed to temperatures of 250, 500 and 750• C. Mass loss and compressive strength were determined and recorded after the specimens were cooled to room temperature. It was concluded that the effect of the boron becomes more apparent at high temperatures.

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Compressive strength–color change relation in mortars at high temperature

Cited by 164 publications

References 6 publications

Retained properties of concrete exposed to high temperatures: Size effect

Retained properties of concrete exposed to high temperatures: Size effect

The Investigation of Heat Performance and Thermal Conductivity of Different Wall Materials at High Temperatures

Influence of High Temperature on Concrete Produced from Portland Cement with Boron Additives

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