The use of surface coating in enhancing the mechanical properties and durability of concrete exposed to elevated temperature

Yuan, Guanglin; Li, Qingtao

doi:10.1016/j.conbuildmat.2015.07.120

Cited by 23 publications

(5 citation statements)

References 27 publications

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“…Various methods for improving the thermal resistance of cement-based composites exist: the use of proper aggregates [ 11 ], the use of various fibers (especially polypropylene fibers—PP) [ 18 , 19 ], the application of surface coatings [ 20 ], and the incorporation of supplementary cementitious materials (SCMs) [ 3 , 5 , 21 ]. It has been reported that the inclusion of SCMs, such as fly ash (FA) or ground granulated blast-furnace slag (GGFBS), can contribute to strength improvements at lower temperatures (up to 400 °C), as well as to minimizing strength loss up to 600 °C, as compared to plain Portland cement concrete.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

2018

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Exposure to elevated temperatures has detrimental effects on the properties of cementitious composites, leading to irreversible changes, up to total failure. Various methods have been used to suppress the deterioration of concrete under elevated temperature conditions. Recently, nanomaterials have been introduced as admixtures, which decrease the thermal degradation of cement-based composites after exposure to high temperatures. This paper presents a comprehensive review of recent developments related to the effects of nanoparticles on the thermal resistance of cementitious composites. The review provides an updated report on the effects of temperature on the properties of cement-based composites, as well as a detailed analysis of the available literature regarding the inclusion of nanomaterials and their effects on the thermal degradation of cementitious composites. The data from the studies reviewed indicate that the inclusion of nanoparticles in composites protects from strength loss, as well as contributing to a decrease in disruptive cracking, after thermal exposure. From all the nanomaterials presented, nanosilica has been studied the most extensively. However, there are other nanomaterials, such as carbon nanotubes, graphene oxide, nanoclays, nanoalumina or nano-iron oxides, that can be used to produce heat-resistant cementitious composites. Based on the data available, it can be concluded that the effects of nanomaterials have not been fully explored and that further investigations are required, so as to successfully utilize them in the production of heat-resistant cementitious composites.

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Section: Introductionmentioning

confidence: 99%

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

2018

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“…Most of the structural damage to reinforced concrete in various countries of the world is caused by corrosion of steel [3][4] [5] [6]. Corrosion of steel in concrete can be considered an economic problem because some major countries in Europe and North America annually repair structural damage caused by corrosion of steel by spending hundreds of millions of moneys [7]. Red Sea State, eastern Sudan, is the only coastal region in Sudan.…”

Section: Introductionmentioning

confidence: 99%

Study Of The Impact Of Several Coatings In Minimizing The Rebar Corrosion In Concrete

Mohammed

Bass

Kambal

2024

JKUES

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This paper represents experimental study to examine the influence of several coatings to decrease the rebar corrosion. The experiments were carried out for three types of coatings. Those have been painted on the steel and select the best type of coatings in decreasing the steel corrosion rate. Testing program included experiments to select the best one within three types of coatings (Isonem MS Polymers, Sika Zink Rich-1, Isonem PU Floor) are used and available in market. The result of corrosion rate for rebar in uncoated samples in level five (after 70-days) was loss of more than 50% from its weight. While, the result of corrosion rate for rebar in samples with coating type (C) "Isonem PU Floor" was loss of less than 2 % from its weight which is the most effective type and the best coating.

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“…There are few publications concerning the use of NS for the modification of concrete. However, investigations described in [ 41 , 42 , 43 , 44 , 45 ], carried out on the cement concrete at the high temperature, show that the concrete behavior in these circumstances can be different due to the presence of the coarse aggregate. The aggregate makes up about 70% of the volume of concrete, so it mainly decides on the mechanical performance of concrete at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-SiO2 on the Microstructure and Mechanical Properties of Concrete under High Temperature Conditions

et al. 2021

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The aim of the research was to determine how the admixture of nanosilica affects the structure and mechanical performance of cement concrete exposed to high temperatures (200, 400, 600, and 800 °C). The structural tests were carried out on the cement paste and concrete using the methods of thermogravimetric analysis, mercury porosimetry, and scanning electron microscopy. The results show that despite the growth of the cement matrix’s total porosity with an increasing amount of nanosilica, the resistance to high temperature improves. Such behavior is the result of not only the thermal characteristics of nanosilica itself but also of the porosity structure in the cement matrix and using the effective method of dispersing the nanostructures in concrete. The nanosilica densifies the structure of the concrete, limiting the number of the pores with diameters from 0.3 to 300 μm, which leads to limitation of the microcracks, particularly in the coarse aggregate-cement matrix contact zone. This phenomenon, in turn, diminishes the cracking of the specimens containing nanosilica at high temperatures and improves the mechanical strength.

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The use of surface coating in enhancing the mechanical properties and durability of concrete exposed to elevated temperature

Cited by 23 publications

References 27 publications

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

The Influence of Nanomaterials on the Thermal Resistance of Cement-Based Composites—A Review

Study Of The Impact Of Several Coatings In Minimizing The Rebar Corrosion In Concrete

Effect of Nano-SiO2 on the Microstructure and Mechanical Properties of Concrete under High Temperature Conditions

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