Study of the effect of alkalis on the slag cement systems

Zeghichi, Leila; Mezghiche, Bouzidi; Chebili, Rachid

doi:10.1139/l05-041

Cited by 13 publications

(7 citation statements)

References 1 publication

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“…Recently it has been demonstrated by Zeghichi et al (2005) that the compressive strength of a mortar containing 80% slag, 20% cement using sodium hydroxide activator was around 11 N/mm 2 at 7 days, which is comparable with the results of the present study using clay in mortar. These findings also agree with results reported by other authors (Dai and Cheng, 1988;Shi, 1996) indicating that the strength obtained with sodium hydroxide activation was very low.…”

Section: Chemical Activationsupporting

confidence: 91%

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Activation of clay in cement mortar applying mechanical, chemical and thermal techniques

Amin

Alam

Gul

et al. 2012

Advances in Cement Research

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Different techniques such as mechanical activation, chemical activation and thermal activation have been employed to activate clay used as a cement replacement material. The clay was activated mechanically by grinding it to 250, 360 and 420 m 2 /kg Blaine surface areas; chemically by mixing clay with two alkalis (potassium hydroxide (KOH) and sodium hydroxide (NaOH)) with different concentrations and thermally by keeping the mortar samples at 20, 40 and 608C. Samples were tested for compressive strength at the ages of 3, 7 and 28 days. All these methods were found to enhance the reactivity of clay. It was found that an increase in the fineness of clay increased the strength development and the fineness should be greater than that of cement in order to enhance the performance.

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Section: Chemical Activationsupporting

confidence: 91%

“…At early age the strength of clay mortar containing sodium hydroxide was less than 30% of that of cement mortar. It was found that the strength of the alkali activator has a greater impact on the strength of the clay-cement system (Zeghichi et al, 2005) This fact may explain the low strength obtained in this study.…”

Section: Mechanical Activationmentioning

confidence: 51%

Activation of clay in cement mortar applying mechanical, chemical and thermal techniques

Amin

Alam

Gul

et al. 2012

Advances in Cement Research

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“…The blast furnace slag is a by-product of iron ore processing obtained from plant for steel manufacturing located in Annaba (North-East Algeria) (Kellouche et al, 2010;Zeghichi et al, 2005). Its chemical composition is also presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Long-term strength and resistance to chemical aggressive environments of blast furnace slag, pozzolan and limestone ternary cements

Noui,

Zeghichi,

Elbahi

et al. 2024

SEES

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In the cement industry, the search for a less expensive binder using mineral additions from industrial by-products or natural resources has become a major concern on the one hand to compensate for the deficit in the manufacture of Portland cement and on the other hand to reduce the environmental impact linked to the massive use of Portland cement. This research aims studying the feasibility to produce ternary cement systems by replacing clinker with a binary combination of two different mineral additions. Two types of ternary cement systems were studied: type A with 65% clinker and 35% (natural pozzolan and limestone), and type B with 65% clinker and 35% (blast furnace slag and limestone), were the combination of mineral additions was 10%+25%, 17,5%+17,5%, and 25%+10%, respectively. Study of mortars (type A or B, and sand) compressive strength at the ages of 28 days, 1 year and 3 years was carried on. Resistance to chemical aggressive environments, namely sulphuric acid (H2SO4) and hydrochloric acid (HCl) solutions, was also studied after an initial 28 days curing and for six months period of immersion, by compressive strength test, weight and pH changes. The effect of aggressive environment on the internal microstructure was also studied by mercury intrusion porosimetry (MIP).

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“…The curing temperature has a significant impact on the hydration of blast furnace slag [9]. Zeghichi et al [10] investigated the effect of the alkaline activation of slag cement with clinker. The results showed that alkaline activators accelerate hydration and stimulate the hardening process.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Recycled Construction and Demolition Materials for Deep Soil Mixing

et al. 2023

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Reusing construction and demolition wastes for geotechnical and geo-environmental purposes has already become a research hotspot. This study was carried out to evaluate the feasibility of using recycled construction and demolition wastes in a partial substitution of cement to enhance the mechanical properties of soft soil. The strength and stiffness development of two types of recycled material (RM1 and RM2), incorporated with peat and clayey soil under 7, 14, and 28 days’ curing time, was investigated based on unconfined compressive strength and free–free resonance frequency test methods. The findings demonstrated that clayey soil showed an average of 2.5 times higher strength than peat with the addition of recycled materials, regardless of the type. However, after 14 days of curing, the strength remained constant for peat soil. Moreover, it is concluded that the studied granular recycled materials could be used to replace a part of the cement content to improve the strength and stiffness properties.

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Study of the effect of alkalis on the slag cement systems

Cited by 13 publications

References 1 publication

Activation of clay in cement mortar applying mechanical, chemical and thermal techniques

Activation of clay in cement mortar applying mechanical, chemical and thermal techniques

Long-term strength and resistance to chemical aggressive environments of blast furnace slag, pozzolan and limestone ternary cements

Feasibility of Using Recycled Construction and Demolition Materials for Deep Soil Mixing

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