Investigating pore structure of nanoengineered concrete

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Investigating pore structure of nano-engineered concrete ...

Sep 16, 2020  Pore structure, the most important structural feature of reactive powder concrete (RPC) with nanofillers, is closely related to the dispersion quality, content

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Investigating pore structure of nano-engineered concrete ...

Investigating pore structure of nano-engineered concrete with low-field nuclear magnetic resonance

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Investigating pore structure of nano-engineered concrete ...

Request PDF Investigating pore structure of nano-engineered concrete with low-field nuclear magnetic resonance Pore structure, the most important structural

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Interfacial characteristics of nano-engineered concrete ...

Oct 30, 2020  Characteristics of interfacial transition zone (ITZ) in nano concrete were studied. • Interfacial bond strength of nano concrete is 65% higher than that of plain

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Nano-engineered Concrete SpringerLink

Portland cement concrete is a complex nanostructured, multiphase, multiscale composite material that evolves over time [1, 2].The elementary block

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Investigation of pore structure and ITZ of concrete ...

Sep 01, 2015  The pore structure and interfacial transition zone (ITZ) in seawater concrete as indicators of marine concrete durability are explored and analysed. Mercury

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Experimental Investigation on Pore Structure ...

The density and the pore structure of concrete is thought to be changed undesirably, along with the ongoing consumption of Ca(OH) 2. With the increasing the

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Systematic investigation into mechanical strength, pore ...

In this study, high performance concrete (HPC) containing two types of nanoparticles: carbon nano tubes (CNTs) and nano silica (NS) and hybrid nanoparticles (CNTs + NS) were prepared. The compressive strength, phase composition, pore size distribution, surface area, surface morphology and microstructural characteristics were investigated at 7 and 28 days of hydration.

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‪Chunsheng, ZHOU‬ - ‪Google Scholar‬

Investigating pore structure of nano-engineered concrete with low-field nuclear magnetic resonance J Wang, S Dong, C Zhou, A Ashour, B Han Journal of Materials Science 56 (1), 243-259 , 2021

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IRJET- An Experimental Investigation on the Effect of Nano ...

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 08 Issue: 04 Apr 2021 irjet p-ISSN: 2395-0072 An Experimental Investigation on the Effect of Nano- Silica Particles on the Properties of Concrete Mohammed Ayub Ghori1, Syed Ahmed Uddin Fahad2, Mohammad Zeeshan3, Mr. K Sri Charan 1, 2, 3B.EStudents, Dept. of Civil Engineering, ISL ...

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New mix could double concrete’s carbon uptake - Purdue ...

Feb 10, 2021  This paper studies the effects of nano-TiO2 in CO2 sequestration of hardened cement paste depending on the water-to-cement ratio (w/c) and the pore structure. Twelve cement paste mixtures were prepared with four different percentages of nano-TiO2 (0%, 0.5%, 1%, 2%) and three w/c (0.45, 0.50, 0.55).

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Experimental Investigation on Pore Structure ...

In this paper, the pore structure characterization of concrete exposed to deionised water and 5% NaCl solution was evaluated using mercury intrusion porosity (MIP), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effects of calcium leaching, fly ash incorporation, and chloride ions on the evolution of pore structure characteristics were investigated.

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Construction and Building Materials

a Zachry Department of Civil Engineering, Texas AM University, ... which can cause the refinement of the pore structure. Also, nano-TiO ... of concrete with the addition of nano-Al 2O

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The effect of nano-SiO2 on concrete properties: a review

The incorporation of nano-SiO 2 can optimize the pore structure of recycled aggregate concrete and limit the diffusion capacity of chloride ions . Adding nano-SiO 2 to the cementing system can accelerate the early hydration of concrete, which is very beneficial for strengthening the early strength of concrete

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Beneficial Use of Nano-Silica in Concrete: A Review

the nano-structure of cementitious matrix in order to evaluate its effects on concrete performance using advanced characterization techniques. Furthermore, the manipulation of the nano-structure of the cementitious matrix can create superior qualities like enhanced mechanical properties, reduced porosity and even self-healing capabilities [1-3].

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Microstructural properties of nano-rice husk ash concrete ...

Jan 28, 2019  In modern science, the material behavior can be controlled by incorporating nano-building blocks or objects in concrete. Nanoparticle used in this study is rice husk ash. By using SEM analysis, the size of the nanoparticle was found to be in a range of 70–90 nm. In this investigation, the durability characteristics of concrete modified with fly ash and nano-rice husk ash in M35 grade are ...

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Self Healing Concrete: Nano Tailored Material

Current Overview: Aiming at establishing novel approaches to corrosion control, this project represents a non-traditional investigation, involving the application of polymeric nano-aggregates in reinforced concrete.The emphasis is on self-healing of corrosion damages in reinforced concrete, by tailoring the material properties of both steel and concrete via initially admixed micelles and/or ...

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Professor Ashraf Ashour, Professor of Structural ...

Aug 27, 2021  Prof. Ashour was the Editor-in-Chief of the Structures and Buildings Journal (ICE). He is also a member of many other journal and conference editorial boards and professional committees. Professor Ashour was the Head of the Civil Engineering at the University of Bradford between 2007-2012. He has been the external examiner for more than 20 PhD ...

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Dispersion characteristics of various contents of nano ...

Aug 08, 2018  Effect of nano‐TiO 2 on the compressive strength and permeability of cement paste was studied, and the mechanism was revealed through investigating the hydration evolution and hydration products distribution of cement containing various contents of nano‐TiO 2.Hydration Heat of cement, microstructure and pore structure of cement paste indicated that nano‐TiO 2 could act as “nuclear ...

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Assessment of Nano Silica effects on Self-Compacting Concrete

SCC has become the most revolutionary development in concrete construction and nanotechnology, which has attracted the interest of researchers, is considered as a special research prospective. The present work is carried out for self-compacting concrete M40 grade by replacing fly ash and nano-silica partially. The replacement of cement with fly ash is kept consistent in all the cases and the ...

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Microstructure analysis and Strength properties of ...

Though use of nano particles as a partial replacement for cement play a major role in increasing the compressive strength of concrete, improving microstructure and pore structure of concrete specimen the cost of manufacturing nano sized particles is very high which limits their use liberally. In

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1 1,2,* and Jicun Shi 2

Mar 02, 2021  Materials 2021, 14, 1170 4 of 15 where l is pore diameter. N is total number of pores. n l is number of pores per unit volume. S1 and S are the pore area and whole concrete area, respectively. P is the volume rate of hardened cement paste without air pores, %. In order to characterize the propagation mechanism of pore structures under freeze–

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Investigation of the bond strength and microstructure of ...

In addition, concrete prepared with the RM-modified aggregate had a low voidage, a compact ITZ structure and strong interfacial adhesion, resulting in considerably enhanced mechanical properties. This study provides novel applications for RM that can be widely used in building materials and waste reduction and a new method for improving the ...

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The effect of nano-SiO2 on concrete properties: a review

The incorporation of nano-SiO 2 can optimize the pore structure of recycled aggregate concrete and limit the diffusion capacity of chloride ions . Adding nano-SiO 2 to the cementing system can accelerate the early hydration of concrete, which is very beneficial for strengthening the early strength of concrete

Get Price

An Experimental Investigation on the Effect of Nano ...

concrete. Nano-silica on wet condition and nano clay dry condition have remarkable improvement strength of high performance concrete. There also appears improvement for flexural strength concrete due to use nano particles. Min-Hong Zhang et.al (2011) “Use of nano

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Beneficial Use of Nano-Silica in Concrete: A Review

the nano-structure of cementitious matrix in order to evaluate its effects on concrete performance using advanced characterization techniques. Furthermore, the manipulation of the nano-structure of the cementitious matrix can create superior qualities like enhanced mechanical properties, reduced porosity and even self-healing capabilities [1-3].

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Influence of Pore Structure on Compressive Strength of ...

This paper describes an experimental investigation into the pore structure of cement mortar using mercury porosimeter. Ordinary Portland cement, manufactured sand, and natural sand were used. The porosity of the manufactured sand mortar is higher than that of natural sand at the same mix proportion; on the contrary, the probable pore size and threshold radius of manufactured sand mortar are finer.

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Dispersion characteristics of various contents of nano ...

Aug 08, 2018  Effect of nano‐TiO 2 on the compressive strength and permeability of cement paste was studied, and the mechanism was revealed through investigating the hydration evolution and hydration products distribution of cement containing various contents of nano‐TiO 2.Hydration Heat of cement, microstructure and pore structure of cement paste indicated that nano‐TiO 2 could act as “nuclear ...

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Microstructure of Concrete IntechOpen

Oct 05, 2016  Microstructure of concrete. Concrete has a heterogeneous microstructure, which consists of three components, namely, cement paste, pore structure, and interfacial transition zone between the cement paste and aggregates. Improving these three components leads to enhance mechanical strength and durability of concrete. 3.1.

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Self Healing Concrete: Nano Tailored Material

Current Overview: Aiming at establishing novel approaches to corrosion control, this project represents a non-traditional investigation, involving the application of polymeric nano-aggregates in reinforced concrete.The emphasis is on self-healing of corrosion damages in reinforced concrete, by tailoring the material properties of both steel and concrete via initially admixed micelles and/or ...

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Study the Characterizations of Cement Mortar by Nano ...

shares of pozzolanic and filling effects on the pore structure refinement which depends on the percentage of nano silica addition [3]. The influences of nano silica particles, which its size is (19 nm) have been used as a cement addition by (1, 3, 5, 7 and 10 %) by weight of cement content. Scanning electron microscope (SEM) analysis of

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Compressive strength prediction of nano-silica ...

Abstract Effect on strength characteristics of nano-engineered concrete when cement content is replaced with nano-silica at small replacement levels is analysed experimentally and numerically in this paper. The reactivity of nano-silica within the cement paste is quantified through investigating microstructural images of cement pastes. A multiscale finite element model based on quantification ...

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PORE STRUCTURAL AND FRACTAL ANALYSIS OF THE INFLUENCE

In the present work, the effects of fly and/or silica fume on the mechanical properties, drying shrinkage, as well the cracking and abrasion resistance of concrete were investigated, then the pore structures of concrete added with fly ash and silica fume and the pore surface fractal dimensions (D s) were determined by the mercury intrusion ...

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Frontiers Editorial: New Technologies for Investigating ...

Apr 06, 2021  The MIP results confirmed that the pore structure became finer with increasing hydration age and the expansion caused by MgO hydration would not damage the concrete structures.In this special issue, 6 papers associated with the new technologies for investigating cementitious materials and enhancing performance are published.

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