Preliminary study on the water permeability and microstructure of concrete incorporating nano-SiO2

Ji, Tao

doi:10.1016/j.cemconres.2005.07.004

Cited by 621 publications

(232 citation statements)

References 7 publications

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“…Jo et al (2007) have shown in their experiments that the increase in compressive strength for mortars containing nano-silica is 3 to 12 percent [13]. T. Ji (2005) has shown that the permeability of concretes containing nanosilica decreases [14]. The use of nano-silica in high-strength concrete can increase short-term and long-term strength.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Compressive Strength of Micro- and Nano-silica Concrete by Statistical Method

Zarehparvar-Shoja

Eskandari‐Naddaf

2017

CivileJournal

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In recent years, the use of nano-particles to improve the properties of concrete has created a new perspective on concrete technology. Studies in this field indicate improved concrete properties and higher strength by adding nano and micro silica particles to concrete mixes. In this regard, 12 mixing designs with different amounts of these admixtures with three types of cement strength classes (525,425,325) and 36 cubic samples (10 × 10 × 10) were designed and tested to measure compressive strength, of which we have only used 6 mixing plans in this research. The purpose of this research is to present a new method for concrete mix design by optimizing principles. Therefore, in this paper, the Taguchi statistical methods and the factorial design of the optimal mixing plan for this type of concrete are used to reduce the number of experiments to predict the optimal composition of the materials. The results obtained from the MINITAB software show that the effect of combined micro-silica and nano-silica on the compressive strength is in one direction and the effect of these two factors is more than cement strength grade of the cement and also the optimal value for micro-silica and nano-silica are estimated to have an optimum amount of micro-silica and nano-silica of 95 and 38 grams, respectively.

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Section: Introductionmentioning

confidence: 99%

Optimizing Compressive Strength of Micro- and Nano-silica Concrete by Statistical Method

Zarehparvar-Shoja

Eskandari‐Naddaf

2017

CivileJournal

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“…Some researchers [4,5] investigated the durability of concrete in relation with carbonation reactions, such as aggregate alkali, to the corrosion of reinforcement, and resistance to sulphate Meanwhile conducted a study on permeability based on microstructure observations of concrete, which said that concrete with Nano Silica had a good impermeability, and produced more solid concrete [6].…”

Section: Introductionmentioning

confidence: 99%

Untitled

Pattinaja¹,

Jonbi²,

Tjahjani³

2015

Proceedings of the 2nd International Conference on Green Materials and Environmental Engineering

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Abstract-The latest trend of concrete technology declared that concrete is not only needs strength but also durability. It is concurrently with the environmental issues that material durability is something that needs to be prioritized in its use. Various attempts have been made to produce concrete that has high durability. Many studies and experiments have been done partly by using admixtures of fly ash, and silica fume (FS). The latest development was the application of nano silica (NS) to improve the performance of concrete especially its durability. In this study, further experiments were done by using admixtures of nano silica with and without silica fume. The additives were applied to the concrete mix design of high performance concrete (HPC) with ƒ'c 100 MPa as a reference, then mixed with NS in a percentage of 3%, 5%, 10%, 15% with and without silica fume. Further compressive strength, and durability testing were done with a standard DIN 1045, and RCPT standard ASTM C 1202. The experimental results shown that the optimum admixtures proportion were the application of NS 5% and SF 5%, which given the best of concrete compressive strength and durability. Furthermore, the combination of the used of nano silica with silica fume is more effective than nano silica without silica fume.

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“…Furthermore, the simultaneous use of nSO and ash presents a higher performance in the properties of mortars at early ages, resistance to corrosion and as a consequence an increased durability [14,15,16,17,18,19]. However, researches that combine the use of nSO and ash are scarce [12,13,14], in particular scientific papers related to reinforced mortars with replacements of OPC by nSO and RHA which address the issue of durability and corrosion of reinforcement [20].…”

Section: Introductionmentioning

confidence: 99%

Chloride Penetration in mortars with replacements of rice husk Ash and nano-SiO2

Almeraya‐Calderón¹,

Fajardo-San-Miguel²,

Martínez‐Villafañe³

2013

IOSRJEN

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-Ashes and nanoparticles (NP) have been incorporated individually in mortars to improve its macrostructure and microstructure. However, regarding the simultaneous use of ashes and NP there are few reports addressing the study of resistance to corrosion. It was evaluated in this work the mechanical, physical and electrochemical performance in mortars with plastic consistency according to ASTM C 1437-99, replacement of ordinary Portland cement (OPC) by rice husk ash (RHA) and nano Silica Oxide (nSO), conducting studies of mechanical resistance to simple compression, porosity, superficial absorption, rapid chloride penetration test (RCPT) and accelerated corrosion in mortars with replacements of OPC of 1.0% of nSO and 20.0% of RHA. According to results, the simultaneous use of nSO + RHA has a higher performance in the properties of mortars with decreases in porosity and total charge passed of 3.9% and 75.6%, and increase in compressive strength, and corrosion of 7.1% and 37.6 %, respectively. Mortars of plastic consistency with replacement of OPC by RHA and nSO in simultaneous use count with higher performance in their physical, mechanical and electrochemical properties than in individual use of RHA and nSO.

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Preliminary study on the water permeability and microstructure of concrete incorporating nano-SiO2

Cited by 621 publications

References 7 publications

Optimizing Compressive Strength of Micro- and Nano-silica Concrete by Statistical Method

Optimizing Compressive Strength of Micro- and Nano-silica Concrete by Statistical Method

Untitled

Chloride Penetration in mortars with replacements of rice husk Ash and nano-SiO2

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