Discussion of the paper “Understanding expansion in calcium sulfoaluminate–belite cements” by I.A. Chen et al., Cem. Concr. Res. 42 (2012) 51–60

Valenti, Gian Lorenzo; Marroccoli, Milena; Pace, Maria Lucia; Telesca, Antonio

doi:10.1016/j.cemconres.2012.08.002

Cited by 32 publications

(15 citation statements)

References 19 publications

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“…Later on, one set of samples was aged at 20°C under tap water, the other stored in a controlled humidity (H) chamber at 70% R.H. and 20°C. The length changes were determined as average values of four measurements with a caliper accurate to ±1 m; the reference length for them was that evaluated just after demolding [Telesca et al, 2014b;Valenti et al, 2012].…”

Section: Measurements On Pastesmentioning

confidence: 99%

Synthesis and characterization of belite calcium sulfoaluminate cements produced by oxyfuel combustion residues

Telesca¹,

Marroccoli²,

Ibriş³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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In this work, the possibility of reusing ashes issued by an oxyfuel combustion process (OC) as a source of material in the production of belite calcium sulfoaluminate BCSA cements has been investigated. OF process is one of the most promising combustion technologies for CO2 reduction from power plants. Combustion tests were carried out in an oxyfuel bubbling fluidized bed pilot plant. Four BCSA clinker-generating raw mixes were heated in a laboratory electric oven in the temperatures range 1150°-1350°C: one included only natural materials (limestone, clay, bauxite and gypsum), the others contained OC ashes as total substitute for clay. X-ray diffraction (XRD) analysis on the burning products showed high conversion of reactants toward the main BCSA clinker components (C2S and C4A3$), especially at 1200° or 1250°C. Moreover, physical-mechanical tests associated with XRD and differential thermal-thermogravimetric analyses accomplished on all the cements (obtained by adding natural gypsum to the clinkers produced at the best synthesis temperatures) generally displayed a similar hydration behaviour.

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Section: Measurements On Pastesmentioning

confidence: 99%

Synthesis and characterization of belite calcium sulfoaluminate cements produced by oxyfuel combustion residues

Telesca¹,

Marroccoli²,

Ibriş³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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“…The porosity of the CSA mortar decreases with the increase in anhydrite content and the decrease in w/c ratio. 27 A series of factors can influence the expansion of CSA concrete, 8,29 but ye'elimite content plays an important role. If the proportion of ye'elimite is more than 50% in CSA cement, expansion, cracking, and loss of strength appear at later stage; the appropriate content of ye'elimite seems to range from 30% to 40%.…”

Section: Sulfoaluminate Cementsmentioning

confidence: 99%

Binders alternative to Portland cement and waste management for sustainable construction—part 1

Coppola

Bellezze

Belli

et al. 2018

Journal of Applied Biomaterials & Functional Materials

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“…BCSA cements represent a promising alternative to OPC as they exhibit comparable physical and mechanical properties [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41]. The technical behavior of BCSA cements mostly depends on the ability of C 2 S and C 4 A 3 $ (their main components) to generate, upon hydration, CSH (calcium silicate hydrates, at medium and longer periods) and C 6 A$ 3 H 32 (ettringite, at early ages), respectively.…”

Section: Introductionmentioning

confidence: 99%

Study of Eco-Friendly Belite-Calcium Sulfoaluminate Cements Obtained from Special Wastes

2020

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Belite-calcium sulfoaluminate (BCSA) cements are special binders obtained from non-Portland clinkers; they have become increasingly more important due to their environmental impact during the manufacturing process compared to Portland cements, such as lower energy consumption and CO2 emissions. The aim of this paper was to assess the possible use of titanogypsum (T) and water potabilization sludge (W) to reduce the amount of natural raw materials (natural gypsum and clay, respectively) used in the production of BCSA cements. Three BCSA clinker generating raw mixes, containing T and/or W, and a reference mix based only on natural materials (limestone, clay, bauxite and natural gypsum) were heated in an electric furnace at temperatures ranging from 1200 to 1350 °C. Quantitative X-ray diffraction (XRD) analysis of the burnt products showed high conversion of reactants towards the main hydraulically active BCSA clinkers components of C2S and C4A3$, particularly at temperatures of 1300 and 1350 °C. Isothermal calorimetric measurements, differential thermal–thermogravimetric and XRD analyses as well as porosimetric measurements showed that all BCSA cements, from mixing the clinkers (at optimum temperatures) with commercial anhydrite, exhibited similar hydration behavior.

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Discussion of the paper “Understanding expansion in calcium sulfoaluminate–belite cements” by I.A. Chen et al., Cem. Concr. Res. 42 (2012) 51–60

Cited by 32 publications

References 19 publications

Synthesis and characterization of belite calcium sulfoaluminate cements produced by oxyfuel combustion residues

Synthesis and characterization of belite calcium sulfoaluminate cements produced by oxyfuel combustion residues

Binders alternative to Portland cement and waste management for sustainable construction—part 1

Study of Eco-Friendly Belite-Calcium Sulfoaluminate Cements Obtained from Special Wastes

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