Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics

Hanna, Rosângela Abdala; Barrie, Patrick J.; Cheeseman, Christopher R.; Hills, Colin D.; Büchler, Pedro Maurício; Perry, R.

doi:10.1016/0008-8846(95)00138-3

Cited by 68 publications

(24 citation statements)

References 14 publications

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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: 97%

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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Section: Ftir Studymentioning

confidence: 97%

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

Sivakumar¹,

Ravibaskar²

2009

APR

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“…2(D)) displays a sharp band at 3640 cm −1 associated to O H stretching vibrations of portlandite [Ca(OH) 2 ]; a weak band at 1110 cm −1 and a sharp peak at 660 cm −1 corresponding, respectively, to S O 4 stretching mode (ν 3 ) and out-ofplane bending mode (ν 4 ) of ettringite; and also a shoulder near 530 cm −1 probably due to out-of-plane Si O bending vibrations (ν 4 ). 16,17 All samples with the exception of the GP sample contain carbonate species pointed out by the presence of the large absorption band near 1450 cm −1 and of the small one at 870 cm −1 , respectively, related to anti-symmetric stretching (ν 3 ) and outof-plane bending (ν 2 ) modes of CO 3 2− ions. 15,16 This observation suggests that geopolymers are less sensitive to atmospheric carbonation than ordinary Portland cement or alkali-activated slag cement.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

(Micro)-structural comparison between geopolymers, alkali-activated slag cement and Portland cement

Lecomte

Henrist

Liégeois

et al. 2006

Journal of the European Ceramic Society

486

152

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“…The chemical reason, the main reason for intensive decrease in compressive strength at early curing ages (1 and 3 days), was attributed to contamination with heavy metals (Asavapisit et al, 1997;Fernández Olmo et al, 2001;Hamilton and Sammes, 1999;Hanna et al 1995;Hills et al, 1992;Tashiro et al, 1977;Youn et al, 1995). Heavy metal oxides such as zinc, lead, chromium and iron cause retardation of cement paste and prevent the formation of the main cement hydration products, such as C-S-H and Influence of CSF on characteristics of cement-based solidified heavy metalscontaminated soil for road pavement Hassani, Ganjidoust and Rajabpour Ashkiki portlandite (Ca(OH) 2 ) crystals which bear the mechanical forces (Asavapisit et al, 1997).…”

Section: Resultsmentioning

confidence: 96%

Influence of condensed silica fume on characteristics of cement-based solidified heavy metals-contaminated soil for road pavement

Hassani¹,

Ganjidoust²,

Ashkiki³

2011

Advances in Cement Research

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The solidification/stabilisation of heavy metals-contaminated soil using ordinary Portland cement and the influence of condensed silica fume (CSF) on the characteristics of solidified soil for possible pavement application were investigated in the present study. The soil to cement ratio was 1 : 12 . 5 and CSF was added at 3, 5 and 8% of cement by weight to mixtures during specimen preparation. The tests carried out included compressive strength, water absorption and toxicity characteristic leaching procedure, X-ray diffraction and scanning electron microscopy. At early curing ages, heavy metals-contaminated soil intensively decreased the compressive strength from 12 . 3 N/mm 2 in cement mixture to 0 . 14 N/mm 2 in the soil-cement mixture; and CSF had no noticeable effect on compressive strength but increased the consolidation of the relevant mixtures which satisfied the minimum US Environmental Protection Agency's regulatory limit for safe land disposal. During ageing, CSF gradually enhanced the retarded and diverted cement hydration reactions and the relevant solidified mixtures met the ACI 299R-99 requirement for controlled low strength materials in limited constructions. As an important result, the 28-day-cured soil-cement mixture which included CSF (8% by cement weight) achieved compressive strength of 45 N/mm 2 , which was greater than UK transportation requirement for pavement concrete. Leaching results showed that CSF with a particle size finer than 150 ìm and at the added amounts had no significant and noticeable effect on the leaching characteristics. Based on X-ray diffraction patterns, the hydration reactions appeared to be diverted through the production of subsidiary products and as a result, major crystalline phases grew and developed irregularly and consequently coated the aggregates poorly, as observed in scanning electron micrographs. CSF decreased the water absorption of the solidified mixtures in which it was included and their structure became dense.

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Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics

Cited by 68 publications

References 14 publications

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

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

(Micro)-structural comparison between geopolymers, alkali-activated slag cement and Portland cement

Influence of condensed silica fume on characteristics of cement-based solidified heavy metals-contaminated soil for road pavement

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