A Fourier transform infrared spectroscopic investigation of the early hydration of Portland cement and the influence of sodium lignosulfonate

Mollah, M. Yousuf A.; Yu, Wei; Schennach, Robert; Cocke, David L.

doi:10.1016/s0008-8846(99)00243-4

Cited by 396 publications

(158 citation statements)

References 10 publications

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“…In 24 h old samples, the Si-O stretching band was shifted by only 5 cm −1 . This low shift suggests that there was very little polymerization of the silicates in the wood-cement composites, as proposed by Mollah et al [28]. This result is confirmed by the slight change of the relative intensity of the Si-O bending vibration at 525 cm −1 .…”

Section: Resultssupporting

confidence: 80%

Modification of cement hydration at early ages by natural and heated wood

Govin

Peschard

Guyonnet

2006

Cement and Concrete Composites

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International audienceHeat treatments of wood are widely used for the reduction of wood swelling and dimensional instability of wood-cement composites. The effect of natural and heated wood on the hydration of cement at early ages was investigated by isothermal calorimetry, thermogravimetry (TGA) and Fourier transform infrared (FTIR) spectroscopy. The addition of wood strongly delays and inhibits the hydration of the silicate phases. Consequently, the amount of portlandite is lower in composites than in neat cement. Approximately 30% of the inhibition of portlandite precipitation is due to an increase of calcium carbonate content in cement paste. The absorption of a part of water by wood produces a decrease in gypsum consumption. Nevertheless, the ettringite formation is not significantly affected since a diffusion of sulfate ions from wood occurs

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Section: Resultssupporting

confidence: 80%

Modification of cement hydration at early ages by natural and heated wood

Govin

Peschard

Guyonnet

2006

Cement and Concrete Composites

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“…In the 1hour OPC spectrum (Fig. 2a), the OH stretching band at 3640cm -1 , symmetric stretching ( 1 ) (Harchand et al, 1980;Mollah et al, 1999;Hassaan M Y & Abdel N. Hakeem, 1989;Mollah et al, 2000;Ghosh S N & Chatterjee A K, 1974;Hanna et al, 1995). The 3 sulphate doublet bands transform to a singlet (1102cm -1 ) on 1day hydration (Taylor H F W, 1990).…”

Section: Ftir Studymentioning

confidence: 96%

Investigation on the Hydration Properties of the Rice Husk Ash Cement Using Ftir and Sem

Sivakumar¹,

Ravibaskar²

2009

APR

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Effect of Rice husk ash on hydration properties of rice husk ash cement paste are reported in this paper. Rice Husk Ash (RHA) is used to replace 20% of Portland cement and water to solid ratio is 0.4. The hydration products observed due to rice husk ash addition were confirmed using the characteristic peak of Fourier Transform Infrared (FTIR) spectra and the micro structural changes were noted using Scanning Electron Microscope (SEM) micrographs. The rice husk ash cement paste gains more strength due to the production of more Calcium Silicate Hydrate (CSH) gel (pozzolanic reaction products).

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“…In particular, the FT-IR results have been used to resolve the hydroxyl bands, to understand the degree of silicate polymerization occurring, and to monitor the dynamics of changes in the sulfate region during hydration reaction. Also, the effect of atmospheric carbon dioxide on hydration has been characterized [5] .…”

Section: Introductionmentioning

confidence: 99%

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

Gomes

Ferreira

2005

Polímeros

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Abstract:Recently, modern techniques have been applied for analysis of the influence of polymers on microstructural properties of Portland cement, such as Thermogravimetric Analyses (TG), Scanning Electronic Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and Mercury Intrusion Porosimetry (MIP). In this study, thermogravimetric analyses were used to study the influence of vinyl acetate-versatic vinylester copolymer (VA/VeoVA) in seven pastes of 28-day old Portland cement, in which distinct polymer contents and water/cement ratios were employed. In addition, analyses of FT-IR and MIP on Portland cement pastes modified by the copolymer were employed. The results showed that the addition of polymer interferes significantly in the reduction of Portlandite formation and increases the porosity of the matrices. A possible chemical interaction between the copolymer and hydrated products of Portland cement was also observed.

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A Fourier transform infrared spectroscopic investigation of the early hydration of Portland cement and the influence of sodium lignosulfonate

Cited by 396 publications

References 10 publications

Modification of cement hydration at early ages by natural and heated wood

Modification of cement hydration at early ages by natural and heated wood

Investigation on the Hydration Properties of the Rice Husk Ash Cement Using Ftir and Sem

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

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