Effect of nanomaterials additives on performance of concrete resistance against magnesium sulfate and acids

In this experimental study, we synthesized geopolymer materials with different amounts of nano-ZnO (0.3%, 0.5% and 0.7%). The effects of the nano-ZnO concentration on the mechanical, structural and thermal properties were studied in detail. XRD investigation revealed the formation of a glassy phase in all the samples and a small shift of the intense peak, which confirmed the incorporation of nano-ZnO into the geopolymer matrix. FTIR analyses showed an increase in the geopolymerization after the addition of nano-ZnO to geopolymer paste. The morphology of the inorganic polymers was studied by mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). The addition of nano-ZnO improved the ultrasonic pulse velocity and increased the compressive strength from 30 to 38 MPa. It was found that the strength reached its maximum value at a critical nano-ZnO concentration of 0.5 at.%. The thermal properties of geopolymer nano-ZnO were also investigated using thermogravimetric analysis (TGA), which showed that the incorporation of nano-ZnO decreased weight loss by the geopolymers. The density and the absorption water were also tested and all the results were discussed. ARTICLE HISTORY * The title of this manuscript should define any chemical symbols or structures by the names, so I suggest that authors change the title to "Study the effect of nano zinc oxide on structural, thermal, and mechanical properties of geopolymerbased metakaolin". "Study the effect of nano-ZnO on structural, mechanical and thermal properties of geopolymer-based metakaolin" → Effect of nano-ZnO on mechanical and thermal properties of geopolymer Abstract * Please, authors, clarify and rephrase the concept of the sentences in lines 20 and 21.Furthermore, infrared specters showed an increase of geopolymer gel content with the addition of nano-ZnO → FTIR analyses showed an increase in the geopolymerization after the addition of nano-ZnO to the geopolymer paste. * The sentences in the lines 25 and 26 need rephrasing and English grammar check, please.

show abstract

“…0.5% and then decreased with the addition of 0.7%. The same behavior was obtained by Diab et al [31].…”

Section: Ultrasonic Pulse Velocity (Upv)supporting

confidence: 88%

Effect of nano-ZnO on mechanical and thermal properties of geopolymer

Zidi

Ltifi

Ayadi

et al. 2019

Journal of Asian Ceramic Societies

View full text Add to dashboard Cite

show abstract

“…The immersion of concrete in the sodium sulfate solution leads to portlandite leaching and gypsum formation, which further leads to AFM conversion into ettringite. Ahmed M. Diab et.al [10] The effect of nanomaterial, represented by Nano-SiO2 (NS) and NanoMetakaolin (NMK), on the absorption, total porosity, magnesium sulfate resistance and acid resistance of High Strength Concrete (HSC) and High-Performance Concrete (HPC). This study was performed on three grades of concrete (55 MPa, 80 MPa and 90 MPa) with cement content of 350, 450 and 600 kg/m3 and water/binder ratio of 0.45, 0.29 and 0.24 respectively.…”

Section: IImentioning

confidence: 99%

A Review Paper on the Effect of Sulphate Attack on Concrete Durability

Kanaujia¹

2021

IJRASET

View full text Add to dashboard Cite

Durability of concrete is a vital property that affects its serviceability. One of the factors that affect concrete durability is sulphate attack, which can result to expansion, cracking, deterioration and deformation of concrete structures. However the present study focuses on affect of sulphate on concrete durability In this research the findings of various research papers were studied wherein different tests were performed on different types of concrete specimens. The specimens varied in size were and subjected to multiple test settings. These different tests are compressive strength, Elastic modulus, Weight evolution, Load displacement curve, Erosion age etc. For each of the aforementioned tests the results were different for eg. The result of compressive strength tests of the specimen were found to have reduced in the beginning when the concentration of solution is increased but with the passages of time it shows an increasing trend.

show abstract

“…Estos incrementos fueron de 114%, 151% y 197% para las pastas P1, P2 y P3, respectivamente. Puesto que se trata de adición de NS en la matriz cementante, estos resultados pueden ser atribuidos a la reactividad de las NS con la portlandita, que resulta en la producción del C-S-H secundario conllevando a una mayor densificación de la matriz, conforme reportan algunos autores (Nazari y Riahi, 2010;Atahan y Dikme, 2011;Jalal et al, 2012;Li et al, 2013;Moslemi et al, 2014;Tobón et al, 2015;Gómez-Zamorano y Castillo-Linton, 2016;Arel y Thomas, 2018;Diab et al, 2019). Asimismo, se puede notar que la resistividad eléctrica de la pasta control se mantiene prácticamente constante, mientras que en las pastas producidas con 0.1% de NS, hubo un incremento generalizado promovido por el desarrollo de la hidratación.…”

Section: Resistividad Eléctrica De Las Pastasunclassified

“…Las NS en adición y/o sustitución mejoran la resistencia a compresión, la resistencia a flexión, la resistencia agentes agresivos como los sulfatos cloruros y el dióxido de carbono incrementando sustancialmente la durabilidad de las ECR. Cabe mencionar que, en estas investigaciones, el contenido de NS se mantuvo en un rango de 0.25% a 15% con respecto al peso del cemento (Nazari y Riahi, 2010;Atahan y Dikme, 2011;Jalal et al, 2012;Li et al, 2013;Moslemi et al, 2014;Tobón et al, 2015;Gómez-Zamorano y Castillo-Linton, 2016;Arel y Thomas, 2018;Diab et al, 2019). Asimismo, otros investigadores aplicaron las NS en matrices cementicias mediante tratamiento superficial durante el curado y/o por migración eléctrica, los resultados mostraron un incremento de resistividad eléctrica que resultó en un incremento de la resistencia de los morteros a la carbonatación y al ingreso de iones cloruros.…”

Section: Introductionunclassified

Mitigación De Los Efectos Del Ataque Por Sulfatos en Morteros Por Tratamiento Superficial Con Nanopartículas Base Silicio

Silva¹,

Romero²,

Miguel³

et al. 2019

Memorias Conpat 2019

View full text Add to dashboard Cite

El objetivo de este trabajo es estudiar la influencia del tratamiento superficial en edades tempranas con nanopartículas base silicio simple (NS) y funcionalizada (NF) en la reducción del ataque por sulfatos en morteros. Este trabajo aún se encuentra en desarrollo, por lo que se están llevando a cabo pruebas preliminares. Inicialmente se realizó una búsqueda en la plataforma SCOPUS de las investigaciones desarrolladas en México (últimos 5 años) que abarcan el tema de la durabilidad. Se produjeron las NS por el método sol-gel y fueron añadidas a pastas de cemento Portland Ordinario-CPO como adición o aplicadas mediante un tratamiento superficial, usando una concentración de 0.1%. Posteriormente, se realizaron pruebas de caracterización fisicoquímica en las NS y de resistividad eléctrica en las pastas. Los resultados mostraron que las pastas producidas con adición de 0.1% de NS presentaron un incremento de resistividad hasta un 197%. Por su parte las pastas tratadas superficialmente presentaron un incremento alrededor de 240%. Además, se observó que el tema de los sulfatos aún es poco estudiado en México, dado que presentó un porcentaje de 13.33% de los casos, contra 57.33% de iones cloruros y 29.33% de carbonatación.

show abstract

Effect of nanomaterials additives on performance of concrete resistance against magnesium sulfate and acids

Cited by 70 publications

References 42 publications

Effect of nano-ZnO on mechanical and thermal properties of geopolymer

Effect of nano-ZnO on mechanical and thermal properties of geopolymer

A Review Paper on the Effect of Sulphate Attack on Concrete Durability

Mitigación De Los Efectos Del Ataque Por Sulfatos en Morteros Por Tratamiento Superficial Con Nanopartículas Base Silicio

Contact Info

Product

Resources

About