Use of thermal analysis in the hydration studies of a type 1 portland cement produced from mineral tailings

Bhatty, Javed I.; Reid, Ken

doi:10.1016/0040-6031(85)85205-9

Cited by 59 publications

(16 citation statements)

References 6 publications

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“…The first stage occurs between 35°C and 70°C, where the water present in the large dimensions pores evaporates. In the second stage, which occurs between 70 and 105°C, there is the liberation of water retained by capillary pressure in the capillary pores [30][31][32][33]. The second peak, that occurs at 761°C, is related with the decarbonation of calcium carbonate (CaCO 3 ) [30,34].…”

Section: Microstructurementioning

confidence: 99%

Influence of adding phase change materials on the physical and mechanical properties of cement mortars

Cunha

Lima

Aguiar

2016

Construction and Building Materials

112

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h i g h l i g h t sFour compositions were developed with incorporation of non-encapsulated PCM. The influence of the non-encapsulated PCM in mortars was evaluated. The incorporation of PCM did not affect the density and the mechanical strengths. The incorporation of PCM leads to a decrease in the water absorption. The ambient temperature did not affect the compressive strength. a b s t r a c tDuring the last years several studies of construction materials with incorporation of encapsulated phase change material (PCM) have been published. However, the utilization of non-encapsulated PCM is one of the main gaps. The main objective of this work was the study of physical and mechanical properties of cement mortars with incorporation of non-encapsulated PCM. It was possible to conclude that the utilization of non-encapsulated phase change materials can be seen as a good and more economical solution for the energy efficiency of the buildings, without prejudice of the properties.

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Section: Microstructurementioning

confidence: 99%

Influence of adding phase change materials on the physical and mechanical properties of cement mortars

Cunha

Lima

Aguiar

2016

Construction and Building Materials

112

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“…Reactions that occur with an increase of temperature in cement paste and concrete can be summarized as: evaporable water and a part of the bound water escapes at 30-102°C [4]. The decomposition of gypsum [15] and ettringite [16] takes place at 110-170°C, The decomposition of the C-S-H and carboaluminate hydrates undergoes at 180-300°C [17]. Dehydroxylation of the portlandite [18] occurs at 450-550°C.…”

Section: Introductionmentioning

confidence: 99%

Understanding the mechanism of decomposition reactions of neat and superplasticized ordinary Portland cement pastes using thermal analysis

Gad¹,

Habib²,

Mousa³

2018

Epitoanyag - JSBCM

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the effect of polycarboxylate superplasticizer on thermal stability and the kinetic thermal decomposition of oPc without and with 1.0 and 1.5% wt% plasticizer has been studied at temperature range of 30-1000 o c. the study was done by means of thermogravimetry (tG) technique under non-isothermal condition at a heating rate of 10 k/min. the results showed that the decomposition occurs for the superplasticized and neat oPc paste in three steps. the neat oPc was found to decompose at higher temperatures than those for the superplasticized paste. the kinetic parameters for each one of the decomposition steps were calculated through four calculation methods and the kinetic mechanisms were determined from the thermal data analysis using 35 solid state reaction models. the results showed that the mechanisms of decomposition steps depend on the percentage of the superplasticizer added to the paste. the thermodynamic parameters ΔS # , Δh # and ΔG # were also computed and discussed. keywords: Hydration kinetics, ordinary Portland cement oPc, thermogravimetric analysis tGA Prof. dr. elshafie A. GAd Professor of Petrochemicals. my interests are surfactants applications, QsPr, computational chemistry and recently solid state kinetics. dr. Amr osman hAbib received his m.sc and Ph.D from Ain shams university, cairo, egypt. He is currently a lecturer at Faculty of engineering, Ain shams university. He is a member of technology of Building materials and Pore structure of solids unit, (r & D unit), Faculty of science, Ain shams university, and member of the engineering consultants centre, Faculty of engineering, Ain shams university. Prof. dr. emeritus, mahmoud m. mouSA, Faculty of science, Benha university, his interests are treatment of industrial solid wastes, renal function studies, iminodiacetic Acid Analog, nanomaterials application and solid state kinetics.

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“…The third phenomenon (III) corresponds to de-hydration of CH which begins at about 370 1C up to 460 1C. The fourth event (IV) is associated with an uncontrolled carbonation of the sample between 600 1C and 700 1C (Bhatty and Reid, 1985;Alarcon-Ruiz et al, 2005;Baert et al, 2008;Esteves, 2011).…”

Section: Pozzolanic Activity Evaluationmentioning

confidence: 97%

The effect of rice husk ash as pozzolan in addition to cement Portland class G for oil well cementing

Soares

Braga

Freitas

et al. 2015

Journal of Petroleum Science and Engineering

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Use of thermal analysis in the hydration studies of a type 1 portland cement produced from mineral tailings

Cited by 59 publications

References 6 publications

Influence of adding phase change materials on the physical and mechanical properties of cement mortars

Influence of adding phase change materials on the physical and mechanical properties of cement mortars

Understanding the mechanism of decomposition reactions of neat and superplasticized ordinary Portland cement pastes using thermal analysis

The effect of rice husk ash as pozzolan in addition to cement Portland class G for oil well cementing

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