Materials for Construction and Civil Engineering

Gonçalves, M. Clara; Margarido, F.

doi:10.1007/978-3-319-08236-3

Cited by 43 publications

(8 citation statements)

References 21 publications

(69 reference statements)

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“…Cement production in Poland in 2019 amounted to 19.0 million tons, which is 10% more than in 2017. Cement is a hydraulic binder, which means that after mixing with water it sets, hardens, and achieves proper strength characteristics, even in underwater conditions [30,31]. Due to its properties, cement is widely used as a binding material in the construction industry performing the role of a component of concrete mixtures, mortars, plasters, and many other products of construction chemistry.…”

Section: Cement Manufacturing Processmentioning

confidence: 99%

Conventional and Alternative Sources of Thermal Energy in the Production of Cement—An Impact on CO2 Emission

2021

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The article evaluates the reduction of carbon dioxide emission due to the partial substitution of coal with alternative fuels in clinker manufacture. For this purpose, the calculations were performed for seventy waste-derived samples of alternative fuels with variable calorific value and variable share in the fuel mixture. Based on annual clinker production data of the Polish Cement Association and the laboratory analysis of fuels, it was estimated that the direct net CO2 emissions from fossil fuel combustion alone were 543 Mg of CO2 per hour. By contrast with the full substitution of coal with alternative fuels (including 30% of biomass), the emission ranged from 302 up to 438 Mg of CO2 per hour, depending on fuel properties. A reduction of 70% in the share of fossil fuels resulted in about a 23% decrease in net emissions. It was proved that the increased use of alternative fuels as an additive to the fuel mix is also of economic importance. It was determined that thanks to the combustion of 70% of alternative fuels of calorific value from 15 to 26 MJ/kg, the hourly financial profit gain due to avoided CO2 emission and saved 136 megatons of coal totaled an average of 9718 euros. The results confirmed that the co-incineration of waste in cement kilns can be an effective, long-term way to mitigate carbon emissions and to lower clinker production costs. This paper may constitute a starting point for future research activities and specific case studies in terms of reducing CO2 emissions.

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Section: Cement Manufacturing Processmentioning

confidence: 99%

Conventional and Alternative Sources of Thermal Energy in the Production of Cement—An Impact on CO2 Emission

2021

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“…The bulk density of the studied dolomitic aggregate samples ranges from 1.30 to 1.36 g/cm 3 with an average value of 1.32 g/cm 3 . While natural sand sample shows the highest recorded bulk density value (1.47 g/cm 3 ) and considered the densest aggregate ( Fig.…”

Section: Bulk Densitymentioning

confidence: 99%

“…5). Dolomitic mortars show similarity in dry density which range from 2.39 to 2.41 g/cm 3 . Mortar with natural sand show the dense value (2.42 g/cm 3 ), that related to the good packing shown by sand particles.…”

Section: 21physico-mechanical Propertiesmentioning

confidence: 99%

“…Cementitious materials are defined as compounds that are mixed easily and react with water results in hydration products of calcium silicates (C-S-H), which bind the constituents together. These hydrated phases contribute to cement matrices densification and thus, to improve the mechanical properties and durability [3]. Cementitious repairing mortars mixed with local dolomitic aggregate can offer a number of advantages such as availability, cheapness, easy production with large volume and its compatibility with the older local common concrete.…”

Section: Introductionmentioning

confidence: 99%

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Performance of dolomitic cementitious mortars as a repairing material for normal concrete in Egypt

El-Fakharany¹,

Ezzat²,

Gad³

et al. 2019

Epitoanyag - JSBCM

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“…Specimens are tested up to failure under the effect of uniaxial compression 2 of 18 load. The compressive strength of concrete is calculated by dividing the recorded maximum load by the cross-sectional area [5].…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

El‐Zohairy

Hammontree

et al. 2020

Materials

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Concrete is one of the most common and versatile construction materials and has been used under a wide range of environmental conditions. Temperature is one of them, which significantly affects the performance of concrete, and therefore, a careful evaluation of the effect of temperature on concrete cannot be overemphasized. In this study, an overview of the temperature effect on the compressive behavior of plain hardened concrete is experimentally provided. Concrete cylinders were prepared, cured, and stored under different temperature conditions to be tested under compression. The stress–strain curve, mode of failure, compressive strength, ultimate strain, and modulus of elasticity of concrete were evaluated between the ages of 7 and 90 days. The experimental results were used to propose constitutive models to predict the mechanical properties of concrete under the effect of temperature. Moreover, previous constitutive models were examined to capture the stress–strain relationships of concrete under the effect of temperature. Based on the experimental data and the proposed models, concrete lost 10–20% of its original compressive strength when heated to 100 °C and 30–40% at 260 °C. The previous constitutive models for stress–strain relationships of concrete at normal temperatures can be used to capture these relationships under the effect of temperature by using the compressive strength, ultimate strain, and modulus of elasticity affected by temperature. The effect of temperature on the modulus of elasticity of concrete was considered in the ACI 318-14 equation by using the compressive strength affected by temperature and the results showed good agreement with the experimental data.

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Materials for Construction and Civil Engineering

Cited by 43 publications

References 21 publications

Conventional and Alternative Sources of Thermal Energy in the Production of Cement—An Impact on CO2 Emission

Conventional and Alternative Sources of Thermal Energy in the Production of Cement—An Impact on CO2 Emission

Performance of dolomitic cementitious mortars as a repairing material for normal concrete in Egypt

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

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