Effect of sulfur on the ion concentration of pore solution and the hydration of calcium aluminate cement

Zhang, Yefan; Li, Nan; Yan, Wen

doi:10.1016/j.cemconcomp.2015.05.004

Cited by 19 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The X‐ray diffractogram of the sample B sintered at 1600°C for 3 h, which is presented in Figure , suggests that the major crystalline phase was α‐alumina, while calcium hexaluminate was also registered, as a minor phase. These results suggest that, after its introduction to the slurry, CAC passes through the stages of hydration…”

Section: Resultsmentioning

confidence: 76%

“…Small changes in viscosity were recorded for curing times up to 20 min, whereas viscosity markedly increases when the hydration time increases from 30 to 40 min. The hardening of CAC is primarily due to the hydration of CA (according to cement notation, C = CaO, A = Al 2 O 3 , and H = H 2 O), and the hydration of CAC depends on the curing time . At small values of time, hydration reaction is very slow.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes

et al. 2019

View full text Add to dashboard Cite

The rapid development of engineering filtering process suggests that it is imperative to produce membrane substrates with a fine pore size, high gas permeation, and antifouling properties for efficient and long-term application. This study reports on a novel fabrication method of a porous Al 2 O 3 /CaAl 12 O 19 ceramic membrane substrate by a direct foaming method combined with cement solidification and tape-casting technology. The microstructure of the produced ceramic membrane consisted of pores with a size of 50-150 μm, which were interconnected with each other with a large number of small filtering functional pores of <10 μm. By increasing the amount of the foaming agent, the porosity of the porous Al 2 O 3 /CaAl 12 O 19 ceramic membranes was tailored from 64.8% to 80.5%, and the bending strength decreased from 32.1 ± 1.0 to 9.6 ± 0.9 MPa, respectively. The sintered hydrophilic ceramic substrate was successfully modified to a hydrophobic one (with water contact angles of 143°) by pyrolysis of dimethyldichlorosilane and dichloromethylsilane. The resultant membrane displayed high chemical stability and self-cleaning features. The membrane with a porosity of 64.8% had a N 2 permeation of 3.0 (±0.5) × 10 7 L m −2 h −1 at 0.5 bar and a water flux which could be totally suppressed at a liquid entry pressure of 0.45 bar.

show abstract

Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The N 2 permeation through the sample was measured by a soap bubble flow meter [15]. The following procedures are carried out [16][17][18] once the calcium aluminate cement is added to the slurry to produce the finalized ceramic membrane: hydration process:…”

Section: Materials and Experimentalmentioning

confidence: 99%

Novel Fabrication Processing of Porous Al2O3/CaAl12O19 Membrane by Combining Emulsion, Cement Curing and Tape-Casting Methods

et al. 2022

View full text Add to dashboard Cite

This paper presented an innovative method for fabrication of a porous Al2O3/CaAl12O19 ceramic membrane by combining emulsion method, cement curing and tape-casting technologies. The ceramic membrane featured a smooth surface and a porous internal structure. By adjusting the oil–water volume ratio from 1:1 to 4:1, the porosity of the samples increases from 45.6 to 67.3%, density decreases from 2.07 to 1.32 g/cm3 and bending strength decreases from 64.3 ± 1.2 to 31.7 ± 0.6 MPa. More significantly, the membranes showed great gas permeability (1.2 × 107–2.3 × 107 Lm–2 h–1 bar–1), opening up a wide range of applications in the field of gas filtration processes.

show abstract

“…At higher pH, the formation and stability of AFm phases are promoted over ettringite [58,[92][93][94][95]. The (initial) pH of CSA/BYF and ye'elimite which varies from about 10.0 to 11.5 [47,48,73,[96][97][98][99][100] favours the formation of ettringite.…”

Section: Hydrates At Early Ages 351 Calcium Rich Aluminium Hydratesmentioning

confidence: 99%

Advances in understanding ye'elimite-rich cements

Haha

Winnefeld²,

Pisch³

2019

Cement and Concrete Research

119

View full text Add to dashboard Cite

In this review, we discuss the recent advances in understanding ye'elimite-rich cements. These cements can be classified as follows:(1) low belite one namely called calcium sulphoaluminate cements (CSA) where the main use is in special applications or when combined with OPC and calcium sulphate sources in structural application (2) High belite one namely Belite Ye'elimite ferrite cement (BYF) where their development as an alternative low carbon binders is aimed to replace Portland clinker in structural applications.The main hydrating phase at early age in both systems is ye'elimite. Its formation, its reactivity and its extent of reaction and space filling when hydrating define the properties of the cement. Recent advances in understanding these properties are critically analyzed.Recent activities on the clinker formation and production at laboratory and industrial scale are reported. Additionally, the effects of aluminates rich minerals are reviewed in detail, with a focus on their influence on the hydration mechanism and the resulting hydrates assemblage and its stability in ye'elimite rich systems. Applicability of thermodynamic calculation and its limitations are discussed to underline the role of the environment at each reaction step on the hydrates assemblage.

show abstract

Effect of sulfur on the ion concentration of pore solution and the hydration of calcium aluminate cement

Cited by 19 publications

References 25 publications

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes

Novel Fabrication Processing of Porous Al2O3/CaAl12O19 Membrane by Combining Emulsion, Cement Curing and Tape-Casting Methods

Advances in understanding ye'elimite-rich cements

Contact Info

Product

Resources

About

Effect of sulfur on the ion concentration of pore solution and the hydration of calcium aluminate cement

Cited by 19 publications

References 25 publications

Production and characterization of durable self‐cleaning and engineering porous Al2O3/CaAl12O19 ceramic membranes

Production and characterization of durable self‐cleaning and engineering porous Al2O3/CaAl12O19 ceramic membranes

Novel Fabrication Processing of Porous Al2O3/CaAl12O19 Membrane by Combining Emulsion, Cement Curing and Tape-Casting Methods

Advances in understanding ye'elimite-rich cements

Contact Info

Product

Resources

About

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes

Production and characterization of durable self‐cleaning and engineering porous Al₂O₃/CaAl₁₂O₁₉ ceramic membranes