Optimal nanosilica dosage in mortars and concretes subject to mechanical and durability solicitations

Suárez, Julián D. Puerto; Uribe, C Sandra Liliana; Lizarazo-Marriaga, Juan; Cárdenas-Pulido, Jhon

doi:10.1080/19648189.2020.1731715

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…The mortar and concrete, with nanosilica (nS) dosages of 1.5% to 2.0% by weight and coarser nanoparticles (264 nm) provide enhanced in mechanical and durability properties compared to the finer nanoparticles (36 nm). (Puerto Suárez et al, 2022). In other works, nS dosages of 0.5-2% by weigh, enhanced in 25% the mechanical properties in cement concrete, and dosages of 4% enhanced the compressive strength at 28 days (Raheem et al, 2021).…”

Section: Introductionmentioning

confidence: 78%

Polycarboxylate-based superplasticizer with added silica sub-microspheres for use in Portland cement materials

Ungsson-Nieblas,

Rubio-Rosas,

Vargas-Ortíz

et al. 2023

RMIQ

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Section: Introductionmentioning

confidence: 78%

Polycarboxylate-based superplasticizer with added silica sub-microspheres for use in Portland cement materials

Ungsson-Nieblas,

Rubio-Rosas,

Vargas-Ortíz

et al. 2023

RMIQ

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“…on the incorporation of NS, a more homogeneous ITZ is observed which significantly increases the STS. Suárez et al (2020).…”

Section: Resultsmentioning

confidence: 99%

Mechanical and microstructural behavior of concrete containing marble and nano silica

Sancheti

Kashyap

Yadav

2021

JEDT

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Purpose The purpose of this study is to perform comprehensive investigation to assess the mechanical properties of nano-modified ternary cement concrete blend. Nano silica (NS) (1%, 2% and 3%) and waste marble dust powder (MD) (5%, 10% and 15%) was incorporated as a fractional substitution of cement in the concrete matrix. Design/methodology/approach In this experimental study, 10 cementitious blends were prepared and tested for compressive strength, flexural strength, splitting tensile strength and static modulus of elasticity. The microstructural characteristics of these blends were also explored using a scanning electron microscope along with energy dispersive spectroscopy and X-ray reflection. Findings The results indicate an enhancement in mechanical properties and refinement in pore structure due to improved pozzolanic activities of NS and the filling effect of MD. Originality/value To the best of the authors’ knowledge, no study has reported the mechanical and microstructural behavior of concrete containing marble and NS.

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“…The load is applied using a hydraulic press at a rate of 0.25 MPa/s and an average compressive strength of 3 samples is considered [31,73,87]. The partial replacement of cement with nano-silica (Figure 5a) results in an improvement in compressive strength up to an optimum dosage, beyond which any addition of nano-silica causes a gradual decrease in strength [33,34,83,88,126,127]. This strength enhancement can be attributed to the accelerated cement hydration process, along with the pozzolanic reaction of the nano-silica.…”

Section: Compressive Strengthmentioning

confidence: 99%

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

et al. 2021

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Nanotechnology has emerged as a field with promising applications in building materials. Nanotechnology-based mortars are examples of such building materials that have widespread applications in the construction industry. The main nanomaterials used in mortars include nano-silica, nano-magnesium oxide, nano-alumina, nano-titanium oxide, nano-zinc oxide, nano-clay, and nano-carbon. This review paper presents a summary of the properties and effects of these nanomaterials on cement mortar in terms of its fresh-state and hard-state properties. The fresh-state properties include the setting time, consistency, and workability, while the hard-state properties include mechanical properties such as compressive, flexural, tensile strengths, as well as the elasticity modulus, in addition to durability properties such as water absorption, shrinkage strain, strength loss due to freeze–thaw cycles, and chloride penetration, among others. Different nanomaterials cause different physical and chemical alterations within the microstructures of cement mortar. Therefore, the microstructural characterization and densification of mortar are discussed in detail at varying temperatures. In general, the involvement of nanomaterials in cement mortar influences the fresh-state properties, enhances the mechanical properties, and impacts the durability properties, while reducing the porosity present in the mortar matrix. Cementitious nanomaterials can create a pathway for the easy injection of binding materials into the internal microstructures of a hydration gel to impact the hydration process at different rates, whereas their non-cementitious counterparts can act as fillers. Furthermore, the research gaps and future outlook regarding the application of nanomaterials in mortar are discussed.

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Optimal nanosilica dosage in mortars and concretes subject to mechanical and durability solicitations

Cited by 12 publications

References 47 publications

Polycarboxylate-based superplasticizer with added silica sub-microspheres for use in Portland cement materials

Polycarboxylate-based superplasticizer with added silica sub-microspheres for use in Portland cement materials

Mechanical and microstructural behavior of concrete containing marble and nano silica

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

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