C-A-S-H gels formed in alkali-activated slag cement pastes. Structure and effect on cement properties and durability

Puertas, Francisca; Palacios, Marta; Manzano, Hegoi; Dolado, Jorge S.; Rico, A.; Doña-Rodrı́guez, J.M.

doi:10.1051/matecconf/20141101002

Cited by 11 publications

(2 citation statements)

References 20 publications

(34 reference statements)

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“…All are recognizable from the absorption peaks of the binder components, mainly calcite CaCO3. This is evident from the sharp peaks of in-plane C-O bending (ʋ4) at 710 cm -1 and out-of-plane C-O bending (ʋ2) at 870 cm -1 [11][12][13]. The sharp peak at 870 cm -1 demonstrates the detection of carbonates in the spectra of the old mortar samples of al-Muwaqqar.…”

Section: Ftir Spectroscopymentioning

confidence: 92%

Untitled

2023

Int J Conserv Sci

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This paper aims to analyze and evaluate the function of two types of ancient mortars in the bathhouse at al-Muwaqqar archaeological site in Jordan to promote the awareness level of cultural heritage conservation of ancient buildings and mortars in Jordan. The conservation of archaeological structures requires a thorough characterization and identification of the mortar components before carrying out the restoration, after the preserved results, and during the restoration process to decide how it responds. This work creates an experimental contribution through FTIR to study the influence of organic components on the mechanical performance of the mortar. The application of new techniques in terms of sustainability and compatibility is nowadays more and more important to preserve historical monuments, especially in the context of the increasing damage to the mortar joints in the al-Muwaqqar site. The paper presents new results concerning the identification of the binding materials of mortars, especially the organic parts as egg white or other organic components used in the bathhouse to connect the mosaics, and the collection of further information for compatibility challenges. The results will provide a new pioneering approach application in Jordan in the field of ancient restoration using mortar. The study concludes that it is easy to identify all the organic components of the mortar using Fourier Transform Infrared spectroscopy (FTIR) in the different bands of the organic material supported by thermogravimetric analysis TGA/SEM-EDX. The investigations of both methods have provided accurate information about the technology of mortar production and have indicated a proteinaceous additive in the mortar.

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Section: Ftir Spectroscopymentioning

confidence: 92%

Untitled

2023

Int J Conserv Sci

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“…Ambient temperature curing was achieved by partially replacing Fly Ash with Grounded Granulated Blast Furnace Slag (Davidovits, 2013a;Puertas et al, 2014). This was achieved due to the high calcium content in slag.…”

Section: Introductionmentioning

confidence: 99%

Effect of Micro Lime on The Ambient Cured Sugarcane Bagasse Ash-Based Geopolymer Concrete

Kamau,

Omondi,

Oyaro

2023

jts

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Geopolymer concrete has been the ideal replacement for Ordinary Portland cement concrete in producing green concrete. The binder in geopolymer concrete is a cementitious paste made from amorphous Aluminosilicate and activated by an Alkaline solution. The geopolymerization process is initiated at elevated temperatures. Thus, the curing requires elevated temperatures. This curing method limits the application of geopolymer concrete in the construction industry. In a geopolymer mix, the presence of Calcium ions allows the formation of Calcium Aluminate Silicate and Calcium Silicate Hydrate gels, allowing ambient temperature curing. Therefore, this study investigates the effect of micro lime on the Sugarcane Bagasse Ash-based geopolymer concrete. The micro lime was added to the geopolymer concrete in 1, 3, 5 and 7% by the Sugarcane Bagasse Ash weight. A mix design was based on a Densified Mix Design Algorithm. The tests carried out included compressive strength and water absorption. Ambient curing of the SCBA-based geopolymer concrete was achieved with 1% of the micro lime. The compressive strength increased with the increase of the micro lime, 10N/mm2 at 1%, to 18.25N/mm2 at 7% micro lime. The ambient temperature-cured geopolymer concrete at 3% micro lime had the lowest water absorption rate.

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