Hydration of a Portland cement blended with calcium carbonate

Dweck, Jo; Büchler, Pedro Maurício; Coelho, A. C. Vieira; Cartledge, Frank K.

doi:10.1016/s0040-6031(99)00369-x

Cited by 230 publications

(82 citation statements)

References 11 publications

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“…Thermogravimetry (TG) and derivative thermogravimetry (DTG) have proven to be valuable tool for evaluating the nature of hydration products according to different stages of cement hydration, as well as quantify the different phases [1,[6][7][8][9] .…”

Section: The Importance Of the Thermal Analyses The Importance Of Thementioning

confidence: 99%

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Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

Gomes

Ferreira

2005

Polímeros

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Abstract:Recently, modern techniques have been applied for analysis of the influence of polymers on microstructural properties of Portland cement, such as Thermogravimetric Analyses (TG), Scanning Electronic Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and Mercury Intrusion Porosimetry (MIP). In this study, thermogravimetric analyses were used to study the influence of vinyl acetate-versatic vinylester copolymer (VA/VeoVA) in seven pastes of 28-day old Portland cement, in which distinct polymer contents and water/cement ratios were employed. In addition, analyses of FT-IR and MIP on Portland cement pastes modified by the copolymer were employed. The results showed that the addition of polymer interferes significantly in the reduction of Portlandite formation and increases the porosity of the matrices. A possible chemical interaction between the copolymer and hydrated products of Portland cement was also observed.

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Section: The Importance Of the Thermal Analyses The Importance Of Thementioning

confidence: 99%

“…This patent refers to the use of cement as filler in a polymer matrix. In 1924, the first patent was published using the concept of polymer modification for cement mortar and concrete [2,4,6] .…”

Section: Introductionmentioning

confidence: 99%

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

Gomes

Ferreira

2005

Polímeros

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“…For mortars or pastes based on Portland cement, the decomposition/dehydration associated to mass loss of hydrated products can be measured [2]. Several papers reported the use of thermogravimetric analysis (TG) to assess the formation of hydrates in Portland cement pastes [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Use of high-resolution thermogravimetric analysis (HRTG) technique in spent FCC catalyst/Portland cement pastes

Soriano

Tashima

Bonilla

et al. 2015

J Therm Anal Calorim

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Thermogravimetric analysis (TG) is one of the most common instrumental techniques used for the characterization of pastes, mortars and concretes based on both calcium hydroxide or Portland cement.Important information about pozzolanic materials can be assessed concerning to calcium hydroxide consumption and the formation of new hydrated products. Nevertheless, in some cases, problems associated to the overlapped decomposition processes for hydrates difficult the analysis of obtained data.In this paper the use of high resolution thermogravimetric analysis (HRTG), a powerful technique that allows separating decomposition processes in analysis of hydrated binders, was performed for spent FCC catalyst -Portland cement pastes. These pastes were monitored for 1, 4, 8 hours and 1, 2, 3, 7 and 28 curing days. In order to study the influence of the pozzolanic material (spent FCC catalyst), Portland cement replacements of 5, 15 and 30 % by mass were carried out. The presence of spent FCC catalyst in blended pastes modified the amount and the nature of the formed hydrates, mainly ettringite and stratlingite.

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“…The main composition of limestone powder is calcium carbonate which is easily to be suffered from acid attack. Although they have been implemented about this kind of concrete, most of the researches were limited to the static erosion environment [9][10][11][12]. While in practical projects, the concrete structures such as piers and foundations are usually located where the seepage of groundwater is positive or the erosion of the flowing water is intense.…”

Section: Introductionmentioning

confidence: 99%

Study on Strength and Microstructure of Cement Pastes Containing Limestone Powder under Flowing Acid Solution Condition

Liu

Wang

et al. 2012

ISRN Ceramics

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Different cement pastes containing limestone powder were prepared and soaked, respectively, in flowing acetic acid solution with pH value of 4 and sulfuric acid solution with pH value of 2. The strength and microstructure of the pastes after different flowing acid attack periods were investigated by using strength test, X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques in this study, which reveals the effect of limestone powder on flowing acid resistance mechanism of cement paste. Testing results show that the strength of pastes suffered flowing acid attack decreases with the increase of water-binder ratio and the content of limestone powder. In flowing acetic acid solution, calcium hydroxide and calcium carbonate react with acetic acid, which therefore made deterioration of pastes proceed from the exterior to the interior. In flowing sulfuric acid solution, although calcium hydroxide and calcium carbonate could react with sulfuric acid and form gypsum, the flowing liquid would dissolve it out and thus the crystallization of gypsum was difficult which would somewhat inhibit the swell of pastes.

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Hydration of a Portland cement blended with calcium carbonate

Cited by 230 publications

References 11 publications

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

Use of high-resolution thermogravimetric analysis (HRTG) technique in spent FCC catalyst/Portland cement pastes

Study on Strength and Microstructure of Cement Pastes Containing Limestone Powder under Flowing Acid Solution Condition

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