Influence of nano waste materials on the mechanical properties, microstructure, and corrosion resistance of self-compacted concrete

Hussien, Reham M.; El-Hafaz, L.M. Abd; Sadeek, Rabiee Ali; Faried, A. Serag; Fahmy, Naglaa G.

doi:10.1016/j.cscm.2021.e00859

Cited by 12 publications

(12 citation statements)

References 39 publications

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“…Chen et al [ 22 ] used mullite as raw material, coarse and fine ZrO 2 (Y 2 O 3 ) as admixtures, and prepared zirconia reinforced mullite ceramics with a compressive strength of 378 MPa by isostatic pressing. Hussien et al [ 23 ] used fused mullite, α -Al 2 O 3 micropowder and semistable zirconia as raw materials, polycrystalline alumina fiber as admixture, and sintered at 1500°C for 3 h to prepare a composite material with good dimensional stability and flexural strength. and compressive strength of 56 MPa and 203 MPa, respectively, and the number of thermal shocks up to 36 times of alumina fiber reinforced mullite-zirconia composite ceramics [ 24 ].…”

Section: Results Analysismentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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Because of its excellent properties, mullite porous ceramics are widely used in thermal insulation materials, catalyst carriers, gas-liquid filtration, separation materials, etc. At the same time, zirconia not only has the advantages of high melting point, good chemical stability, and high strength but also can significantly improve the strength of ceramics through phase transformation and particle dispersion in the matrix and is widely used in the reinforcement of ceramics. In this paper, using mullite powder as the raw material, Al2O3 and SiO2/ZrSiO4 as the starting material for the mullite self-bonding phase, and AlF3·3H2O, ZrO2, and Y2O3 as additives, the zirconia-reinforced mullite was prepared by the foaming-injection method. The volume density, linear shrinkage rate, microstructure, room temperature, etc. of nanozirconia-reinforced mullite porous ceramics were studied by the amount of the foaming agent, the amount of mullite self-bonding phase powder, the type and amount of additives, etc. Effects of mechanical properties and thermal conductivity were also analyzed. The research results show that zirconia-reinforced mullite porous ceramics were prepared with mullite powder and 6 wt% AlF3·3H2O as raw materials, and ZrO2 and Y2O3 as additives. Adding an appropriate amount of ZrO2 and Y2O3 can significantly improve the mechanical properties of porous ceramics. When ZrO2 is 6 wt% and Y2O3 is 8 wt%, the porosity is 66.4% and the flexural strength and compressive strength of porous ceramics with a large pore size of 168 μm can reach 14.3 MPa and 36.3 MPa, respectively, which are obviously better than the strength of mullite porous ceramics without adding Y2O3 (flexural strength 11.3 MPa, nanocompressive strength 29.4 MPa).

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Section: Results Analysismentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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“…According to Figure 9, there are findings which indicated that the CS could increase with the increase of NS content (within 6%). 4,15,29,[40][41][42][43] Nearly half of the published findings have shown that the optimal NS content for CS promotion is 2%-3%, [30][31][32][33]37,39,44,49 after exceeding the optimal ratio, the increase rate of CS decreases, though still higher than the control group. This conclusion is also supported by the systematic multiscale models developed by Faraj et al, 86 for predicting CS of SCC modified with NS using three model techniques such as linear regression, nonlinear regression, and multi-logistic regression.…”

Section: Discussionmentioning

confidence: 99%

“…30,34,43 For the normal strength concrete in which the CS is below 60 MPa, after adding 0%-6% NS, the 28-days CS increases more (by 10%-47%). 4,15,29,33,37,39,40,42,44,49 As a SCM for SCC, NS usually plays two roles. One is that the high pozzolanic activity of NS can promote hydration, the reaction between SiO 2 and cement hydration product Ca(OH) 2 produces C-S-H gels, subsequently the generated C-S-H gels can fill the pores in SCC.…”

Section: Discussionmentioning

confidence: 99%

“…Most of the research results from Figure 6 show that adding 0%-12% NS to SCC leads to an increase of SFT500 value. 4,6,29,31,34,40,41,44,47,50 The main reason for increasing the viscosity of SCC is similarly due to NS, which promotes the hydration reaction of SCC and thus increases the water demand. According to Figure 7, adding NS in SCC can increase the VT generally, but in almost all the reviewed studies, 4,[29][30][31][32][33]40,41,44,47,48,50 the VT of SCC after adding NS did not exceed 25 s as recommended by EFNARC, 80 which indicates that the viscosity of SCC can still be controlled to an acceptable level.…”

Section: Viscositymentioning

confidence: 99%

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Recent developments in utilization of nano silica in self‐compacting concrete: A review

Wang

Yang

Chu

et al. 2023

Structural Concrete

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Self‐compacting concrete (SCC) is a type of flowable, high‐strength and high‐performance concrete in the construction field, which can flow and compact under its own weight. The damage of concrete is often caused by internal microstructural defects. Nano silica (NS) has excellent pozzolanic properties, and with an appropriate content of NS as auxiliary cementing material, it can promote the generation of C‐S‐H gels in addition to serve as internal filler, thus improves the micro‐scale defects in concrete. This paper extracts data from studies published over the last decade which focus on the application of NS in SCC and discusses the similarities and differences between the studies. Ultimately, a systematic review of the physical and chemical characteristics of NS, and the effect of NS on the workability, mechanical and durability properties of SCC is presented. Based on the review, the most common NS content is 0%–6%, where the negative effect of 0%–6% NS on the workability of SCC can be controlled by increasing the dosage of superplasticizer. The NS content of 2%–3% is optimum for improving the mechanical strength and the ability of SCC to resist water permeability, corrosion, acid and sulfate attacks, elevated temperature as well as shrinkage.

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“…However, in terms of the selection of cement paste corrosion factors under actual working conditions, these secondary parameters usually need to be ignored. To better simulate the corrosion environment of cement paste under actual working conditions, it is necessary to master the solubility relationship of CO 2 acid corrosion medium under Srivastava et al, 2020;Mei et al, 2019;Mahmoud and Elkatatny, 2020;Hussien et al, 2022 Alkali activated mineral natural volcanic ash/Metakaolin/fly ash/ blast furnace slag, etc…”

Section: Environmental Factorsmentioning

confidence: 99%

Application of anticorrosive materials in cement slurry: Progress and prospect

et al. 2022

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During gas well cementing operation, the erosion of acidic formation corrosive medium will destroy the cementation between the cement slurry and the sidewall in the well sealing section, reduce the mechanical properties of the cement paste, cause problems such as sidewall collapse and casing damage, seriously endanger the normal exploitation of oil and gas resources, and cause major safety accidents. Therefore, improving the corrosion resistance of cement paste is the key to ensuring long-term stable cementing of high-temperature sour gas wells. This paper summarizes the influencing factors, corrosion mechanism, corrosion test methods and research status of anti-corrosion oil well cement additives, discusses the advantages and disadvantages of each anti-corrosion additive, summarizes the latest progress and challenges of anti-corrosion oil well cement, and aims to provide some reference for researchers in related fields.

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Influence of nano waste materials on the mechanical properties, microstructure, and corrosion resistance of self-compacted concrete

Cited by 12 publications

References 39 publications

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Recent developments in utilization of nano silica in self‐compacting concrete: A review

Application of anticorrosive materials in cement slurry: Progress and prospect

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