Effect of raw mix design and of clinkering process on the formation and mineralogical composition of (ternesite) belite calcium sulphoaluminate ferrite clinker

Bullerjahn, Frank; Schmitt, Dirk; Haha, Mohsen Ben

doi:10.1016/j.cemconres.2014.02.004

Cited by 141 publications

(90 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bullerjahn et al 23 also found a mixture of cubic and orthorhombic ye'elimite in their cements and the cubic polymorph increased at the expense of the orthorhombic one with increasing the iron content. A reverse correlation between the amount of ye'elimite and tetracalcium aluminoferrite (C 4 AF) was found, which agrees with the incorporation of iron into ye'elimite framework 23 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pseudocubic Crystal Structure and Phase Transition in Doped Ye’elimite

Cuesta

Torre

Losilla

et al. 2014

Crystal Growth & Design

View full text Add to dashboard Cite

Sodalites are tridimensional alumino-silicate materials containing cages where loosely bonded anions are located. Ye'elimite, Ca 4 [Al 6 O 12 ]SO 4 , is outstanding as an aluminate sodalite with a flexible framework accepting several type of dopants with important structural consequences. Moreover, ye'elimite is also important from an applied perspective as it is the most relevant phase in calcium sulfoaluminate cements. The crystal structure of stoichiometric ye'elimite has recently been unraveled but the structure of dopant-containing ye'elimite, which is presents in cements, is not well studied. Here, we report the pseudo-cubic crystal structure of doped ye'elimite, Ca 3.8 Na 0.2 Al 5.6 Fe 0.2 Si 0.2 O 12 SO 4 , from high-resolution synchrotron powder diffraction data. The powder pattern is indexed with a cubic cell and a structural model is reported based on the I4 ̅ 3m space group. However, this compound displays diffraction peak narrowing on heating. Furthermore, some high-angle split peaks become single peak on heating and a phase transition is measured at 525ºC. Therefore, it is concluded that the crystal structure at room temperature has lower symmetry although it can be described as cubic. The structural study at 800ºC suggests a truly cubic structure and we speculate that this phase transition, on heating, is likely related with the dynamical disordering of the sulfate anions. Finally it is concluded that the high temperature cubic state was not quenchable to ambient, even when the tested chemical substituents are introduced into the structure.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The overall CO 2 emission reduction can amount up to 40%. 21 The effect of iron in the formation of ye'elimite in belite calcium sulfoaluminate clinkers has been also studied 22,23 . The iron content of ye'elimite in these industrially produced clinkers was analyzed and it resulted relatively low 24,25 .…”

Section: Introductionmentioning

confidence: 99%

Pseudocubic Crystal Structure and Phase Transition in Doped Ye’elimite

Cuesta

Torre

Losilla

et al. 2014

Crystal Growth & Design

View full text Add to dashboard Cite

show abstract

“…As a result of many researches [5], an optimized formulation based on a clinker containing C 4 A 3 $, belite (C 2 S) and Ternesite (C 5 S 2 $) was developed [6]. As a consequence, the clinkerization temperature of this type of cement is low (1200°C) compared to Ordinary Portland Cement (1400-1450°C).…”

Section: Cmss-2017mentioning

confidence: 99%

“…The ternesite phase C 5 S 2 $ is a calcium sulphosilicate known also as sulphospurrite, its formation is based on the presence of belite and anhydrite [6] according to the formula (1)…”

Section: Cmss-2017mentioning

confidence: 99%

See 1 more Smart Citation

Mineralogical stabilization of Ternesite in Belite Sulfo-Aluminate Clinker elaborated from limestone, shale and phosphogypsum

et al. 2018

View full text Add to dashboard Cite

Abstract. This paper investigates the mineralogical evolution of sulfoaluminate clinker elaborated from moroccan prime materials limestone, shale and phosphogypsum as a byproduct from phosphoric acid factories. The advantage of the production of this type of clinker is related to the low clinkerisation temperature which is known around 1250°C, and to less consumption quantity of limestone thus enabling less CO 2 emissions during the decarbonation process compared to that of Portland cement. In this study we determine the stability conditions of belite sulfoaluminate clinker containing belite (C 2 S) ye'elimite (C 4 A 3 $) and ternesite (C 5 S 2 $). The hydration compounds of this clinker are also investigated. The monitoring of the synthesized and hydrated phases is performed by X-Ray Diffraction and Infrared spectroscopy. The results show the formation of ternesite at 800°C and the stabilization of clinker containing y'elminite, belite and ternesite at temperatures between 1100 and 1250°C.

show abstract