Studies About the Hydration of Hybrid “Alkaline-Belite” Cement

Sánchez-Herrero, M. J.; Fernández-Jiménez, Ana; Palomo, A.

doi:10.3389/fmats.2019.00066

Cited by 5 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 4 shows a high percentage of Al 2 O 3 and ratios of CaO/SiO 2 = 3.07 and Al 2 O 3 /SiO 2 = 2.54, indicating the formation of the C-A-S-H gel [99]. Formation of the C-A-S-H gel was also reported by Martin and Sánchez-Herrero in their studies focusing on the CSA-FA blends [28,114]. The microstructure of the sample containing CSA, VA, and SCGs is shown in Figure 9c.…”

Section: Scanning Electron Microscopy and Energy Dispersive Electron ...supporting

confidence: 69%

“…The image shows unreacted spherical particles of the morphology typical for FA, and the irregular shapes belong to the SCGs and CSA. The region near the cenospheres of the FA showed a high amount of CaO and Al 2 O 3 , which was associated with the C-A-S-H gel [ 79 , 114 , 115 ]. Table 4 shows a high percentage of Al 2 O 3 and ratios of CaO/SiO 2 = 3.07 and Al 2 O 3 /SiO 2 = 2.54, indicating the formation of the C-A-S-H gel [ 99 ].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Strength and Microstructure Assessment of Partially Replaced Ordinary Portland Cement and Calcium Sulfoaluminate Cement with Pozzolans and Spent Coffee Grounds

Pushpan,

Ziga-Carbarín,

Rodríguez-Barboza

et al. 2023

Materials

View full text Add to dashboard Cite

Supplementary cementitious materials are considered a viable and affordable way to reduce CO2 emissions from the cement industry’s perspective since they can partially or nearly entirely replace ordinary Portland cement (OPC). This study compared the impact of adding spent coffee grounds (SCGs), fly ash (FA), and volcanic ash (VA) to two types of cement: OPC and calcium sulfoaluminate cement (CSA). Cement samples were characterized using compressive strength measurements (up to 210 days of curing), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), attenuated total reflection infrared spectroscopy, and hydration temperature measurements. In all the studied systems, the presence of SCGs reduced compressive strength and delayed the hydration process. CSA composite cement containing 3.5% SCGs, 30% FA, and 30% VA showed compressive strength values of 20.4 MPa and 20.3 MPa, respectively, meeting the minimum requirement for non-structural applications. Additionally, the results indicate a formation of cementitious gel, calcium silicate hydrate (C-S-H) in the OPC-based composite cements, and calcium alumino-silicate hydrate (C-A-S-H) as well as ettringite in the CSA-based composite cements.

show abstract

Section: Scanning Electron Microscopy and Energy Dispersive Electron ...supporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Strength and Microstructure Assessment of Partially Replaced Ordinary Portland Cement and Calcium Sulfoaluminate Cement with Pozzolans and Spent Coffee Grounds

Pushpan,

Ziga-Carbarín,

Rodríguez-Barboza

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…In studies of supplementary cementitious materials (SCMs), researchers have observed the simultaneous formation of N-(C)-A-S-H, C-(N)-A-S-H, and C-A-S-H gels within the cementitious matrix. The specific types and amounts of precursors used contribute to the presence of these different gel formations [27,32,41,42].…”

Section: Introductionmentioning

confidence: 99%

Composite Cements Using Ground Granulated Blast Furnace Slag, Fly Ash, and Geothermal Silica with Alkali Activation

Salas Montoya,

Rodríguez-Barboza,

Colmenero Fonseca

et al. 2023

Buildings

View full text Add to dashboard Cite

In recent decades, alkali activated and blended cements have attracted great interest worldwide due to their advantages of low energy cost, high strength, and good durability. This study evaluated the effects of replacing 50% of Portland cement with a mixture of three waste materials: ground granulated blast furnace slag (GGBFS), fly ash (FA), and geothermal waste (GS), with and without external alkaline activation, and activated with different alkali agents: 4 and 7% Na2O equivalent of sodium hydroxide, sodium silicate (water glass), and sodium sulfate. After 90 days of curing, samples were characterized using compressive strength tests, scanning electron microscopy, X-ray diffraction, and thermogravimetric analyses. The results showed that sodium hydroxide caused an alkali–silica reaction and reduced the strength, while sodium silicate and sodium sulfate improved the strength and hydration products formation. Moreover, the addition of fly ash decreased the compressive strength but increased the workability, while the addition of slag and geothermal waste increased strength and densified the matrix with the formation of additional hydration products. The blended cements without activation also showed better performance than pure cement and a more compact matrix of hydration products. The study demonstrated the feasibility of using waste materials to produce blended cements with low energy costs and high durability.

show abstract

Characterization of a fly ash-based hybrid well cement under different temperature curing conditions for natural gas hydrate drilling

Liu,

Zhao,

et al. 2024

Construction and Building Materials

View full text Add to dashboard Cite

Studies About the Hydration of Hybrid “Alkaline-Belite” Cement

Cited by 5 publications

References 38 publications

Strength and Microstructure Assessment of Partially Replaced Ordinary Portland Cement and Calcium Sulfoaluminate Cement with Pozzolans and Spent Coffee Grounds

Strength and Microstructure Assessment of Partially Replaced Ordinary Portland Cement and Calcium Sulfoaluminate Cement with Pozzolans and Spent Coffee Grounds

Composite Cements Using Ground Granulated Blast Furnace Slag, Fly Ash, and Geothermal Silica with Alkali Activation

Characterization of a fly ash-based hybrid well cement under different temperature curing conditions for natural gas hydrate drilling

Contact Info

Product

Resources

About