Production of more durable and sustainable concretes using volcanic scoria as cement replacement

al-Swaidani, Aref M.

doi:10.3989/mc.2017.00716

Cited by 12 publications

(11 citation statements)

References 21 publications

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“…This can be explained by the reduction of hydration heat on the binder system with the presence of VS [91]. A significant relationship (R 2 ≈ 0.9) between initial and final setting times was obtained by the author depending on data collected from other papers [20,62,71,72,75,79,89,91], as clearly shown in Figure 4. So, knowing initial setting time, the final setting time of the VS-based cement paste can be predicted by using the equation shown in Figure 4.…”

Section: Setting Timesmentioning

confidence: 86%

Volcanic Scoria as Cement Replacement

al-Swaidani¹

2018

Volcanoes - Geological and Geophysical Setting, Theoretical Aspects and Numerical Modeling, Applications to Industry and Their

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Numerous volcanic scoria (VS) cones are found in many places of the world. Many of them have not yet been investigated, although few have been used as binders for a very long time. The use of natural pozzolans as cement replacement could be considered as a common practice in the construction industry due to the related economic, ecologic and performance benefits. This chapter highlights the advantages and disadvantages of the use of volcanic scoria as cement replacement in concrete mixes in terms of fresh and hardened concrete properties. The chemical and mineralogical composition of volcanic scoria samples collected from 36 countries is presented in this chapter, with some further analysis. The effects of using volcanic scoria as cement replacement on some paste, mortar and concrete properties, such as the setting times, the heat of hydration, the compressive strength, the water permeability and the chloride penetrability, have been studied. The improvement in resistance against the chemical attack of volcanic scoria-based cement mortar has also been highlighted. Some estimation equations depending on the data available in literature have also been derived from the analyzed data. The modification of the microstructure of VS-based cement paste has been confirmed, as well.

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Section: Setting Timesmentioning

confidence: 86%

Volcanic Scoria as Cement Replacement

al-Swaidani¹

2018

Volcanoes - Geological and Geophysical Setting, Theoretical Aspects and Numerical Modeling, Applications to Industry and Their

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“…In EN 197-1 [32], early strength (3 days) values should be greater than 10 MPa and standard strength (28 days) values should be between 42.5 MPa and 62.5 MPa. A literature survey shows that the compressive strength of a mortar is decreased by scoria content, due to the reduction of clinker content in the cement mixture [10][11][12]. However, according to comparison of the obtained results with the EN 197-1 [32], the strength requirements were satisfied by the scoria blended cements up to 12% content.…”

Section: Cement Propertiesmentioning

confidence: 99%

“…World PC clinker production is responsible for about 7% of the total CO 2 emissions [6][7][8]. For this reason, particular attention has recently been given to the exploitation of scoria in many countries, including Turkey [9,10], Syria [11,12] and Yemen [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Scoria can be utilized in several industrial applications including the manufacturing of lightweight concrete, as a source of pozzolan to manufacture Portland-pozzolan cement additives, as a heat insulating material, in low cost fillers in paint, filter materials and absorbents, in architectural applications [15], for producing geopolymer mortar [16][17][18] and as a sand in PC mortar [19]. Scoria is abundant in various parts of the world including Turkey [9,10], Syria [11,12], Saudi Arabia [15,21,22] and Cameroon [16,17,19].…”

Section: Introductionmentioning

confidence: 99%

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Preliminary Assessment of Utilization of Al-Jaif Scoria (NW Sana’a, Yemen) for Cement Production

Al-Akhaly

Ahmed

Mohammed

2018

SQU Journal for Science

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This paper presents the results of investigations on the potential industrial utilization of scoria, collected from Al-Jaif quarry, NW Sana'a, Yemen as a cement additive. Scoria was chosen as a cement additive material due to its availability and low cost from the Sana’a-Amran volcanic field in Yemen. The chemical composition of scoria was determined by X-ray fluorescence (XRF). The studied scoria is mainly composed of volcanic glass with a few zeolites (e.g. clinoptilolite) as revealed from petrographic investigation and X-ray diffraction (XRD). The scoria was added to the clinker in the range of 2, 4, 6, 8, 10 and 12% by weight. The fineness, surface area, water demand, setting time and compressive strength were conducted on scoria blended cement. According to experimental results, the high volcanic glass allows the addition of up to 12% scoria to the clinker to maintain a good potential of manufacturing blended cement. The results satisfy the European Standard EN requirements and confirm the viability of using scoria as a cement additive.

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“…The type of cement, with regard to the incorporation of supplementary cementitious materials (SCM's), has been revealed to be among the factors which have the greatest influence on the resistance of concrete to chloride penetration (7)(8)(9)(10)(11)(12)(13)(14). Blast furnace slag (BFS) is one of the most commonly used SCM's in the manufacture of concretes which are intended for exposure to chloride-contaminated environments, especially marine ones (15), due to its ability to retard the entrance of chloride (16,17).…”

Section: Introductionmentioning

confidence: 99%

The influence of curing and aging on chloride transport through ternary blended cement concrete

2018

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The effect of the extension of the curing period and exposure time to a chloride source on the transport of these ions has been studied in concrete with 100% Portland cement (OPC) and with ternary cement composed of 64% OPC, 30% blast furnace slag (BFS) and 6% limestone filler (LF). The extension of the curing time (from 28 to 90 days) did not significantly affect the transport, even in concretes with supplementary cementitious materials (SCM’s). The exposure time to the chloride source (3, 6 and 12 months) is a parameter which had a major influence on the transport. At least 6 months of exposure were necessary to achieve stable chloride diffusion coefficients with more noticeable stabilization occurring when SCM’s were used. The presence of BFS significantly decreased the transport, due to its ability to combine chloride rather than the refinement of capillary pores as a consequence of its late hydration.

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Production of more durable and sustainable concretes using volcanic scoria as cement replacement

Cited by 12 publications

References 21 publications

Volcanic Scoria as Cement Replacement

Volcanic Scoria as Cement Replacement

Preliminary Assessment of Utilization of Al-Jaif Scoria (NW Sana’a, Yemen) for Cement Production

The influence of curing and aging on chloride transport through ternary blended cement concrete

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