Hydration of portland cement clinker in the presence of carbonaceous materials

Dutta, Dipak Kumar; Bordoloi, D. N.; Borthakur, P. C.

doi:10.1016/0008-8846(95)00104-k

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…FTIR spectra of the powder form of the collected three different branded OPC cement of Patan city were taken to identify their functional groups and the results of the FTIR spectra are shown in Figs 1-3. The FTIR absorption peak at 3642 cm -1 is assigned to the O-H stretching of Ca (OH) 2 formed [11]; [12]; [13]; [14] and the intensity of this peak is generally increased with the hydration time. However, two different branded cement samples of the Brand-1 and Brand-3, except Brand-2 sample used in this study did not show a wide absorption peak in the region of 3000-3700 cm -1 which indicates that these two cement samples of the Brand-1 and Brand-3 analyzed here does not contain a large amount of water molecule, but the cement sample of Brand-2 sample has a very broad absorption band between this region as sown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Some Cement Samples of Nepal Using FTIR Spectroscopy

2018

International Journal of Advanced Research in Chemical Science

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Cement is a heterogeneous fine grained material consists mainly of four solid phases of tricalcium silicate (C 3 S; 3CaO.SiO 2), dicalcium silicate (C 2 S; 2CaO.SiO 2), tricalcium aluminate (C 3 A; 3CaO.Al 2 O 3) and tetracalcium alumino ferrite (C 4 AF; 4CaO. Al 2 O 3. Fe 2 O 3) [1] and these chemical components contain various infrared active functional groups. More than 3.4 billion tonnes of cement were produced annually worldwide in the year of 2013 and it was estimated a four-fold increase in the annual production of the cement to the year 2050 [2]. There is no indication that the cement production will be decreased. The ordinary Portland cement is made by firing raw materials-limestone, clay minerals, sand and iron minerals at around 1500° C in a rotary kiln and a series of chemical reaction take place at this temperature and the clinker synthesized. The clinker is cooled, mixed with setting regulators (e.g. gypsum) grounded to a fine powder to obtain the cement [3]. During hydration of the ordinary Portland cement, calcium silicate hydrate (C-S-H) gel and calcium hydroxide, Ca(OH) 2 , are formed from silicates phases and ettringite (AFt), monosulphate (AFm) are formed from aluminate phases [4]. The C-S-H, a major hydration product is the main strength forming phase in the cement paste. The versatility of ordinary Portland cement (OPC) has warranted it continuous interest for the last 150 years [5] and it is expected to draw such interest well into the future. The OPC has now plainly established itself as one of the commodity materials and the mainstay of the construction industry [6, 7]. The OPC is a widely used as a binder in construction industries and it is the most common type of cement around the world. Cement is not a well-defined material since it contains a variety of chemical compositions and additives. Improving the cement within concrete is an essential part of addressing the concerns of concrete durability, maintenance and environmental issues. It is said that the most frequently used analytical technique for the characterization of such construction materials is X-ray diffraction, thermal analysis and microscopic techniques. Nowadays, infrared and other spectroscopic techniques have become as a useful, non-destructive and easy technique to study the phase composition of initial but also the evolved materials due to their Abstract: Cement is one of the most vital ingredients to the construction industries since it forms glue that holds concrete together and it plays a significant role in determining the cost of concrete, its environmental impact and durability, although it comprises only less than 15% of the mass of the concrete. FTIR spectroscopic study was carried out for three different branded Nepali ordinary Portland cement (OPC) collected from the local cement dealers of Patan city of Kathmandu valley (Nepal) to characterize their constituent properties in this study. The properties of the locally available cements in Nepal can be determined quickly and cost effectively using a simple met...

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Section: Resultsmentioning

confidence: 99%

Characterization of Some Cement Samples of Nepal Using FTIR Spectroscopy

2018

International Journal of Advanced Research in Chemical Science

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“…[27]. The presence of calcite is confirmed by the intensification of the band at 3652 cm -1 [28]. The intensity of the broad stretching vibration at around 3400 cm -1 increases This result suggests that the former band was due to the vibrations of the hydroxide of CSH [19,[27][28][29] and of the physisorbed water.…”

Section: Chemical and Mineralogical Characterizationmentioning

confidence: 85%

Thermal, hydric and mechanical behaviours of adobes stabilized with cement

Dao

Ouédraogo

Millogo

et al. 2018

Construction and Building Materials

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The main objectives of this work were to manufacture adobes with good mechanical properties, even in a wet environment, and low thermal conductivity so as to give the population homes that provided better thermal comfort than cement-based constructions. For this purpose, clayey raw material from Burkina Faso, mainly composed of quartz (49 wt.%), kaolinite (28 wt.%), goethite (7 wt.%) and muscovite (9 wt.%) was mixed with up to 12 wt.% of cement to manufacture adobes. Various characterization techniques were implemented to assess the microstructure of these materials: X-ray diffraction, infrared spectrometry, differential scanning calorimetry, scanning electron microscopy and energy dispersive spectrometry. Their physical properties were also investigated (through water absorption, spray test, apparent density, porosity and thermal conductivity) as their mechanical

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“…In the high zone, the C0 spectrum presents a very acute peak at 3645 cm -1 , whose intensity increases with the hydration time. This is assigned to the O-H stretching of Ca(OH) 2 formed [13][14][15][16] .…”

Section: Ir-analysismentioning

confidence: 99%

Hydration study of ordinary portland cement in the presence of zinc ions

Trezza

2007

Mat. Res.

128

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Hydration products of Portland cement pastes, hydrated in water and in the presence of zinc ions were studied comparatively at different ages. Hydration products were studied by X ray diffractions (XRD) and infrared spectroscopy (IR). Although IR is not frequently used in cement chemistry, it evidenced a new phase Ca(Zn(OH)3)2. 2H2O formed during cement hydration in the presence of zinc. The significant retardation of early cement hydration in the presence of zinc is assessed in detail by differential calorimetry as a complement to the study carried out by IR and XRD, providing evidence that permits to evaluate the kinetic of the early hydration

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Hydration of portland cement clinker in the presence of carbonaceous materials

Cited by 17 publications

References 2 publications

Characterization of Some Cement Samples of Nepal Using FTIR Spectroscopy

Characterization of Some Cement Samples of Nepal Using FTIR Spectroscopy

Thermal, hydric and mechanical behaviours of adobes stabilized with cement

Hydration study of ordinary portland cement in the presence of zinc ions

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