Utilisation of lime activated GGBS to reduce the deleterious effect of flooding on stabilised road structural materials: A laboratory simulation

Obuzor, G.N.; Kinuthia, John; Robinson, R. B.

doi:10.1016/j.enggeo.2011.06.010

Cited by 36 publications

(17 citation statements)

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“…The results suggested that there was potential for using these nonfired bricks for low-medium cost housing and energy efficient masonry wall construction. Later, investigation into the durability behavior of lime-GGBS stabilized clay in overcoming the deleterious effect of flooding also yielded promising results (Obuzor et al 2011a(Obuzor et al , 2011b(Obuzor et al , 2012. Soft ground improvement is another application for lime-GGBS soil stabilization.…”

Section: Introductionmentioning

confidence: 95%

Carbide slag–activated ground granulated blastfurnace slag for soft clay stabilization

Liu

et al. 2015

Can. Geotech. J.

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This study addresses the use of an industry by-product, carbide slag (CS), to activate another industry by-product, ground granulated blastfurnace slag (GGBS), for soft clay stabilization in comparison to Portland cement (PC). The properties of CS-GGBS stabilized clays were investigated through unconfined compressive strength (UCS) test, mercury intrusion porosimetry (MIP), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results indicated that the optimum CS content for the CS-GGBS stabilized clay to yield the highest UCS was 4%-6%, varying slightly with curing age and GGBS content. The UCS of the optimum CS-GGBS stabilized clays was more than twice that of the corresponding PC stabilized clays. The main hydration products detected for the CS-GGBS stabilized clays included calcium silicate hydrates (CSH), calcium aluminate hydrates (CAH), and alumino-ferrite monosulfate (AFm).Résumé : La présente étude traite de l'utilisation d'un sous-produit de l'industrie, les scories de carbure (SC) pour activer un autre sous-produit de l'industrie, le laitier granulé broyé de haut-fourneau (LGBH), en vue de la stabilisation de l'argile plastique, en comparaison avec l'emploi de ciment Portland (CP). Les propriétés d'argiles stabilisées par des SC et du LGBH ont été analysées par le biais d'essais de résistance à la compression non confinée (RCNC) et par porosimétrie au mercure (PM), diffractométrie de rayons X (DRX) et microscopie électronique à balayage (MEB). Les résultats ont montré que la teneur optimale en SC permettant à l'argile stabilisée par les SC et le LGBH d'offrir une RCNC maximale était comprise entre 4 et 6 %, intervalle qui varie légèrement selon le niveau de cure et la teneur en LGBH. La RCNC des meilleures argiles stabilisées par des SC et du LGBH représente plus du double de celle des argiles stabilisées par le CP. Les principaux produits d'hydratation détectés dans les argiles stabilisées par des SC et du LGBH sont notamment les hydrates de silicate de calcium (HSC), les hydrates d'aluminates de calcium (HAC) et le monosulfate d'aluminoferrite (AFm). [Traduit par la Rédaction]Mots-clés : scories de carbure, laitier granulé broyé de haut-fourneau, stabilisation de l'argile plastique, résistance à la compression non confinée, microstructure.

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Section: Introductionmentioning

confidence: 95%

Carbide slag–activated ground granulated blastfurnace slag for soft clay stabilization

Liu

et al. 2015

Can. Geotech. J.

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“…In this context, alkaline-earth hydroxides such as Ca(OH) 2 , Sr(OH) 2 and Ba(OH) 2 have also been studied and have been found to be able to facilitate the hydration of GGBS [5,8]. Quicklime (CaO) has also been used in the activation of slags [11,12].…”

Section: Introductionmentioning

confidence: 97%

Strength and hydration properties of reactive MgO-activated ground granulated blastfurnace slag paste

Jin

Al‐Tabbaa

2015

Cement and Concrete Composites

252

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a b s t r a c tGround granulated blastfurnace slag (GGBS) is widely used as a partial replacement for Portland cement or as the major component in the alkali-activated cement to give a clinker-free binder. In this study, reactive MgO is investigated as a potentially more practical and greener alternative as a GGBS activator. This paper focuses on of the hydration of GGBS, activated by two commercial reactive MgOs, with contents ranging from 2.5% to 20% up to 90 days. The hydration kinetics and products of MgO-GGBS blends were investigated by selective dissolution, thermogravimetric analysis, X-ray diffraction and scanning electron microscopy techniques. It was found that reactive MgO was more effective than hydrated lime in activating the GGBS based on unconfined compressive strength and the efficiency increased with the reactivity and the content of the MgO. It is hence proposed that reactive MgO has the potential to serve as an effective and economical activator for GGBS.

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“…Manufacturing 1 t GGBS induces only 0.07 t CO 2 emissions and 1300 MJ energy consumption (Higgins, 2007). GGBS is usually activated by hydrated lime or quick lime for soil stabilisation applications, including treatment of sulphate-bearing expansive soils (Wild et al, 1996(Wild et al, , 1998Tasong et al, 1999;Wild et al, 1999;Puppala et al, 2003;Higgins, 2005;Puppala et al, 2007;Celik and Nalbantoglu1, 2013), manufacture of unfired masonry (Oti et al, 2008a(Oti et al, , 2008b(Oti et al, , 2009a(Oti et al, , 2009b(Oti et al, , 2009c(Oti et al, , 2010Kinuthia and Oti, 2012), treatment of acid sulphate soils (Islam et al, 2014a(Islam et al, , 2014b, reducing flooding effects on road embankment (Obuzor et al, 2011a(Obuzor et al, , 2011b(Obuzor et al, , 2012 and other applications (Hughes and Glendinning, 2004;Osinubik, 2006;James et al, 2008;Wilkinson et al, 2010aWilkinson et al, , 2010bHughes et al, 2011;Yi et al, 2015). A summary of the use of lime-GGBS for soil stabilisation can be found in Higgins (2005) and Nidzam and Kinuthia (2010).…”

Section: Introductionmentioning

confidence: 99%

Comparison of reactive magnesia- and carbide slag-activated ground granulated blastfurnace slag and Portland cement for stabilisation of a natural soil

Zheng

Liu

et al. 2015

Applied Clay Science

111

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Utilisation of lime activated GGBS to reduce the deleterious effect of flooding on stabilised road structural materials: A laboratory simulation

Cited by 36 publications

References 3 publications

Carbide slag–activated ground granulated blastfurnace slag for soft clay stabilization

Carbide slag–activated ground granulated blastfurnace slag for soft clay stabilization

Strength and hydration properties of reactive MgO-activated ground granulated blastfurnace slag paste

Comparison of reactive magnesia- and carbide slag-activated ground granulated blastfurnace slag and Portland cement for stabilisation of a natural soil

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