Durability of mortar matrices of low-cement concrete with specific additions

Soldado, Eliana; Antunes, Ana; Costa, Hugo; Carmo, Ricardo do; Júlio, Eduardo

doi:10.1016/j.conbuildmat.2021.125060

Cited by 15 publications

(8 citation statements)

References 36 publications

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“…It was found that there was a reduction in the water absorption percentage of all the specimens, both those with the partial substitution of cement by MS and NS, as compared with MB-1. The experimental results indicate that the specimens gave a lesser degree of the penetrability due to the filler and pozzolanic effects of the pozzolanic substituents [ 76 ]. These findings showed that the impact of NS on the specimens was relatively higher than that of MS [ 70 ].…”

Section: Resultsmentioning

confidence: 99%

Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete

Bansal,

Bahrami

et al. 2024

PLoS ONE

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The intent of this study is to explore the physical properties and long-term performance of concrete made with metakaolin (MK) as a binder, using microsilica (MS) and nanosilica (NS) as substitutes for a portion of the ordinary Portland cement (OPC) content. The dosage of MS was varied from 5% to 15% for OPC-MK-MS blends, and the dosage of NS was varied from 0.5% to 1.5% for OPC-MK-NS blends. Incorporation of these pozzolans accelerated the hardening process and reduced the flowability, consistency, and setting time of the cement paste. In addition, it produced a denser matrix, improving the strength of the concrete matrix, as confirmed by scanning electron microscopy and X-ray diffraction analysis. The use of MS enhanced the strength by 10.37%, and the utilization of NS increased the strength by 11.48% at 28 days. It also reduced the penetrability of the matrix with a maximum reduction in the water absorption (35.82%) and improved the resistance to the sulfate attack for specimens containing 1% NS in the presence of 10% MK. Based on these results, NS in the presence of MK can be used to obtain cementitious structures with the enhanced strength and durability.

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Section: Resultsmentioning

confidence: 99%

Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete

Bansal,

Bahrami

et al. 2024

PLoS ONE

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“…The property of the durability was increased when the waste materials were treated properly [14]. The durability was increased in the concrete when the cement content was reduced up to 50% and the different materials were added to the concrete [15]. The technology of SEM was used for the concrete to understand the analysis of the morphology.…”

Section: Durabilitymentioning

confidence: 99%

Concrete with Manufactured Sand and the Effects on the Property of Durability

Chitkeshwar¹,

Naktode²

2022

cea

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The concrete is the material generally used in the construction industry. The natural aggregates are the essential materials used in the concrete, but it is observed that there is a shortage of these materials. Therefore, the cost of the material and eventually the construction cost go on increasing across the globe. The manufactured sand i.e. m-sand is a material which can replace the natural fine aggregates if used in proper proportion. Also, the m-sand can be produced in a good amount so that the construction cost is also not affected. In the present work, manufactured sand concrete is studied for the durability properties. Other materials like zinc oxide are also used in the concrete by weight of the cement. The partial replacement of river sand by m-sand is carried out in the percentage varying from 25% to 100%. The tests for the durability which involve water permeability test, acid attack test, sea water test and sulphate attack test have been carried out for the concrete. When the river sand is replaced by m-sand with 50% then the results for the durability obtained hold good results.

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“…As an example, carbonation, shrinkage, creep, and water absorption of low-cement concretes is addressed in [9]. An optimization analysis of the mix of low-cement concretes to improve durability is provided in [10]. The consequences of the crystallization pressure during the hydration of Portland reaching the ultimate tensile strength of concrete matrix, thus getting worse durability, is discussed in [11].…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, a wide experimental campaign was devoted to identifying and quantifying the main chemical and physical properties of SE, with specific reference to density, porosity, water absorption [9][10][11], and resistance to specific aggressive agents such as HCl, HNO 3 , and H 2 SO 4 [11][12][13]. As confirmation of the extrapolated data, a XRD spectra analysis post acid attacks was conducted, enabling the identification of primary phases susceptible to chemical degradation within the SE, contrasting it with conventional cementitious composites.…”

Section: Introductionmentioning

confidence: 99%

Shot-Earth as Sustainable Construction Material: Chemical Aspects and Physical Performance

Barbieri,

Lanzoni,

Marchetti

et al. 2024

Sustainability

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Soil has long been one of the most widely used building materials globally. The evolution of soil-based construction materials has seen steady improvement over the centuries, even as traditional materials have given way to newer options like reinforced concrete. Nonetheless, soil-based construction has maintained its relevance and, in recent decades, has garnered increased attention due to sustainability concerns and renewed research interest. Among the innovative earth-based materials, shot-earth (SE) stands out as one of the most advanced. Research on SE has facilitated efficient handling of soil variability in mix design and provided structural engineers with relevant models for dimensioning and detailing reinforced SE constructions. This paper focuses on studying the durability characteristics of various types of SE to ascertain their ability to withstand environmental degradation over their intended lifespan. The tests conducted indicate that SE can serve as a viable construction material in numerous real-life scenarios, offering a sustainable alternative to existing materials.

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Durability of mortar matrices of low-cement concrete with specific additions

Cited by 15 publications

References 36 publications

Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete

Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete

Concrete with Manufactured Sand and the Effects on the Property of Durability

Shot-Earth as Sustainable Construction Material: Chemical Aspects and Physical Performance

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