Effects of combined natural volcanic powders on the thermo-physical and mechanical properties of structural eco-concrete

Dif, Fodil; Douara, Taha-Hocine; Zaitri, Rebih; Mohamed, Mazlan

doi:10.1016/j.jobe.2020.101835

Cited by 12 publications

(14 citation statements)

References 53 publications

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“…The advantage of the results of the compressive strength at 28 days and at 90 days is in favor of the sand concretes with mineral powder (D) for 5%, 10% and 15% compared to the sand concretes with 5%, 10% and 15% of the mineral powders (A, B and C) used separated. This observation confirms the advantage of several types of research on the use of both mineral powders [14][15][16]36] , and the use of three mineral powders [10,37] . For example, the test results showed that the addition of limestone filler, blast furnace slag, and natural pozzolan, incorporated simultaneously in cement improves the mechanical behavior of limestone mortars [37] .…”

Section: Discussionsupporting

confidence: 81%

“…The third one is the partial substitution of artificial Portland cement or Portland cement compound by other mineral powders. In this context, Itim et al used limestone, pozzolan separated with different percentages [12] ; Burgos-Montes et al substituted a part of cement by limestone, fly ash and silica fume [13] ; Dif et al used combined natural volcanic powders: pozzolan and perlite [14] ; Zaitri et al used dune sand powder and limestone [15,16] ; Deepankar used silica fume, and metakaolin [17] .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Substitution of Cement by Mineral Powders on the Physicomechanical Properties and Microstructure of Sand Concretes

Belhadj¹,

Houessou²,

Montrelay³

et al. 2023

j. of archit. environ. & struct. eng. res.

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The approach that contributes to the development of eco-materials in construction is the use of mineral powders, which can improve mechanical properties and reduce cement consumption. This article aims to study the effect of substitution by mass of cement with mineral powders on the physicomechanical properties and microstructure of sand concretes. The used mineral powders are A: the limestone, B: the natural pozzolan, C: the hydraulic lime, D: (1/3 limestone + 1/3 natural pozzolan + 1/3 hydraulic lime), and E: (1/2 natural pozzolan + 1/2 hydraulic lime). The studied percentages are 5%, 10% and 15%, in both separated and combined states. The studied properties are workability, compressive strength, the elasticity modulus in compression, shrinkage and microstructure analysis. The objective is to target the optimal percentage of the substitution of cement with mineral powders, which ensures the best compromise between the main properties of the studied sand concretes. The obtained results show that the optimal percentage is in favor of the substitution of cement by 10% D (1/3 limestone, 1/3 natural pozzolan and 1/3 hydraulic lime). Even the 15% of mineral powder D, presented similar performances compared to the sand concrete (without mineral powders). Finally, in the context of the development of eco-materials, it should be noted that the 10% D and 15% D (1/3 limestone, 1/3 natural pozzolan and 1/3 hydraulic lime) contribute to decrease the use of cement and consequently to reduce of CO2 emissions.

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Section: Discussionsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Effect of Substitution of Cement by Mineral Powders on the Physicomechanical Properties and Microstructure of Sand Concretes

Belhadj¹,

Houessou²,

Montrelay³

et al. 2023

j. of archit. environ. & struct. eng. res.

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“…The main reason is that BP is usually inert admixtures, which only plays a filling role in concrete and does not have pozzolanic activity with less contribution of the development of compressive strength. By contrast, the traditional mineral admixtures, FA and GGBS, can not only play a filling effect but also have certain pozzolanic activity, which can react with cement hydration products for secondary hydration, further compact concrete and improve the compressive strength of concrete [1][2][3]. In general, adding BP to prepare concrete sample will put an adverse effect on compressive strength of concrete, and it can be foreseen that when recycling BP to replace cement mass, the dosage of BP should be limited.…”

Section: Admixture Typesmentioning

confidence: 99%

Influence of boulder machine-made sand powder on compressive strength of concrete

Wang¹

2021

E3S Web Conf.

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In order to recycle the boulder powder produced in the process of manufactured sand production and reduce the cost of engineering concrete, this article studied the influence of boulders powder on the compressive strength of concrete. The results show that in the early stage of concrete test, the compressive strength of rock powder concrete is slightly lower than of fly ash and mineral powder concrete. With the development of curing age, the strength of boulders powder concrete developed slower. As the increase of boulders powder content, the compressive strength of different curing age gradually decreased, and it was suggested that the content of boulders powder should be controlled within 20% of cementitious materials mass. The positive effect of boulders powder fineness on the strength of concrete is limited, so it is suggested to use unprocessed collected boulders powder in the project, which is economical and environmentally friendly. With the adjustment of water-to-binder ratio, boulders powder can be prepared with different strength grades of concrete to meet the needs of engineering; the composite of boulders powder with traditional mineral admixtures, such as fly ash, and especially granulated blast furnace slag powder, can significantly improve the strength of concrete.

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“…Eco-mortar provides an alternative to traditional mortar, which typically includes cement, sand, and water. In addition to being eco-friendly, eco-mortar offers several other benefits [1]. For instance, it is more resistant to cracking and shrinking than traditional mortar and provides better insulation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Natural Pozzolan and Perlite as Alternatives to Cement in Mortar

2024

Arch Environ Sci Environ Toxicol

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In this study, mineral materials sourced from northwest Algeria are examined as a specific case study. The main focus is on evaluating the feasibility of incorporating natural pozzolan and perlite as eco-friendly alternatives to traditional cement in the composition of mortar. The study involves assessing the mechanical properties and water absorption of the mortars at different time intervals. Additionally, scanning electron microscopy is employed to scrutinize the compositions and structures of the mortar. While mortars with pozzolanic elements initially exhibited reduced strength compared to the reference mortar, enhancements became evident over time. Despite a higher water absorption rate in pozzolanic mortars, the addition of 10% perlite resulted in the least absorption among all pozzolanic mixes. The research underscores the potential of natural pozzolan as an eco-friendly substitute for cement in mortar applications, emphasizing its viability and substantial contributions to environmentally conscious construction practices.

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Effects of combined natural volcanic powders on the thermo-physical and mechanical properties of structural eco-concrete

Cited by 12 publications

References 53 publications

Effect of Substitution of Cement by Mineral Powders on the Physicomechanical Properties and Microstructure of Sand Concretes

Effect of Substitution of Cement by Mineral Powders on the Physicomechanical Properties and Microstructure of Sand Concretes

Influence of boulder machine-made sand powder on compressive strength of concrete

Investigation of Natural Pozzolan and Perlite as Alternatives to Cement in Mortar

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