Effects of nano-silica and nano-limestone on flowability and mechanical properties of ultra-high-performance concrete matrix

Li, Wengui; Huang, Zhiyong; Cao, Fuyang; Sun, Zhihui; Shah, Surendra P.

doi:10.1016/j.conbuildmat.2015.05.137

Cited by 292 publications

(94 citation statements)

References 35 publications

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“…6(b,c). In addition, the NC accelerates the hydration of paste as they provide additional surface for the nucleation and growth of hydrated products 28 . The EDX analysis shows that the FA mortar with NC exhibits lower sulphate to alumina ratio than the control one.…”

Section: Resultsmentioning

confidence: 99%

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Yang

Che

Leng

2018

Sci Rep

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The mechanisms underlying the effects of nano-calcium carbonate (NC) on the strength of high volume fly ash (FA) mortar are discussed. Two NCs are used as 2%, 4%, 6%, and 8% by weight of cementitious materials. Hydrated products of fly ash mortar containing NC was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TG) and differential thermal gravity (DTG) analysis. Results indicate that NC could improve strength of FA mortar due to the more rapid growth of hydrated products induced by NC through additional nucleation sites. Corresponding to the highest measured strength of FA mortar, the optimal contents of NC are around 2%. In addition, the presence of 2% NC improved the microstructure of FA mortar after 180 days due to the formation of calcium carbonaluminate hydrate.

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Section: Resultsmentioning

confidence: 99%

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Yang

Che

Leng

2018

Sci Rep

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“…Nanosilica can not only reduce the porosity of the cement paste, but also helps to densify the ITZ between the aggregate particle and the cement paste [23]. Studies [18,24,25] have shown that the addition of nanosilica results in increased compressive, tensile, and exural strength of conventional concrete. Studies on the use of nanosilica to upgrade the performance of RAC are very limited [26].…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, several types of materials with nanoparticles have been used to improve the mechanical properties, durability behavior, and microstructure of cement paste, mortar, and concrete, for example, nano-SiO 2 [16][17][18], nano-TiO 2 [15,19], nano-Al 2 O 3 [20,21], nano-Fe 2 O 3 [21], carbon nanotubes [22], nanoclay [15], and nanolimestone [18]. However, among these nanoparticles, nano-SiO 2 (nanosilica) can be considered as the most frequently used one in improving the performance of concrete [15,17].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Younis

Mustafa

2018

Advances in Materials Science and Engineering

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e aim of this paper was to examine the feasibility of using nanoparticles of SiO 2 (nanosilica) to improve the performance of recycled aggregate concrete (RAC) containing recycled aggregate (RA) derived from processing construction and demolition waste of concrete buildings. e examined properties include compressive strength, splitting tensile strength, and water absorption. e study also includes examining the microstructure of RA and RAC with and without nanoparticles of SiO 2 . In total, nine mixes were investigated. Two mixes with RA contents of 50% and 100% were investigated and for each RA content; three mixes were prepared with three different nanoparticles dosages 0.4%, 0.8%, and 1.2% (by mass of cement). A control mix with natural aggregate (NA) was also prepared for comparison reasons. e results show that nanoparticles of silica can improve the compressive strength, tensile strength, reduce the water absorption, and modify the microstructure of RAC.

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“…Concrete is the most widely used man-made construction material in the world, and the mechanical property and durability are focused in recent studies [1][2][3][4][5]. Nanomaterials, as products of nanotechnology, are defined as materials with particle sizes less than 100 nm and have many superior properties that differ from traditional materials [6,7]. Nanomaterials can enhance the physical and mechanical properties of the cement-based materials effectively, reduce the porosity, and help in manufacturing the concrete with better performance [8].…”

Section: Introductionmentioning

confidence: 99%

Hydration of Early Age Cement Paste with Nano-CaCO₃ and SAP by LF-NMR Spectroscopy: Mechanism and Prediction

Zhao

Sun

et al. 2019

Modelling and Simulation in Engineering

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In this paper, by testing the evolution of the physically bound water using the low-field nuclear magnetic resonance (LF-NMR) technology, the hydration process of cement paste with nano-CaCO3 (NC) and superabsorbent polymer (SAP) at early age is investigated. Results indicate that the hydration process can be divided into four periods according to the zero points of the second-order differential hydration curve: initial period, acceleration period, deceleration period, and steady period. Firstly, with the increase in the water to cement ratio, the starting time of the hydration period is delayed, and the duration becomes longer. Secondly, the addition of NC leads to the speedy arrival of each period and shortens the duration of each period in the hydration process, and the optimal NC content is 1.5%. Thirdly, with the increase in SAP content, the starting time of the hydration period is delayed and the duration becomes longer. Finally, based on the experimental results and the existing hydration model, the modified hydration model considering the content of NC and SAP is proposed.

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Effects of nano-silica and nano-limestone on flowability and mechanical properties of ultra-high-performance concrete matrix

Cited by 292 publications

References 35 publications

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Hydration of Early Age Cement Paste with Nano-CaCO₃ and SAP by LF-NMR Spectroscopy: Mechanism and Prediction

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Effects of nano-silica and nano-limestone on flowability and mechanical properties of ultra-high-performance concrete matrix

Cited by 292 publications

References 35 publications

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

High volume fly ash mortar containing nano-calcium carbonate as a sustainable cementitious material: microstructure and strength development

Feasibility of Using Nanoparticles of SiO2 to Improve the Performance of Recycled Aggregate Concrete

Hydration of Early Age Cement Paste with Nano-CaCO3 and SAP by LF-NMR Spectroscopy: Mechanism and Prediction

Contact Info

Product

Resources

About

Feasibility of Using Nanoparticles of SiO₂ to Improve the Performance of Recycled Aggregate Concrete

Hydration of Early Age Cement Paste with Nano-CaCO₃ and SAP by LF-NMR Spectroscopy: Mechanism and Prediction