Performance evaluation of self-compacting concrete containing fly ash, silica fume and nano titanium oxide

Chinthakunta, Raghavender; Ravella, Durga Prasad; Madduru, Sri Rama Chand; Yadav, Maganti Janardhan

doi:10.1016/j.matpr.2021.01.681

Cited by 13 publications

(4 citation statements)

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“…The results showed that the tensile and flexural strength increased with increasing NT content to 3 wt.%. The addition of 3% NT improved the compressive strength by 19.2% [ 148 ]. In turn, the influence of TiO 2 particle size has also been identified by scientists.…”

Section: Results Of Mechanical Properties Of Modified Cement Mortarsmentioning

confidence: 99%

Photoactive Cements: A Review

Dudek

Janus

2022

Materials

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This article presents a short overview of modified cements with photocatalytic activity. First, the types and three main methods of obtaining photoactive cements are presented. The most frequently used modification method is the incorporation of a photocatalyst into the total mass of the cement. The second group analyzed is cements obtained by applying a thin layer of photoactive materials, e.g., paints, enamels, or TiO2 suspensions, using various techniques. The third group is cement mortars with a thick layer of photoactive concrete on the top. In addition, methods for determining the photoactivity of cement composites, mechanical properties, and physicochemical parameters of such materials are briefly presented. Finally, examples of investments with the use of photoactive cements and development prospects are shown.

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Section: Results Of Mechanical Properties Of Modified Cement Mortarsmentioning

confidence: 99%

Photoactive Cements: A Review

Dudek

Janus

2022

Materials

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“…In the same context, several investigations have been carried out to study the influences of nanomaterial's inclusion on the mechanical performance and chemical durability of GPC composites [18,19], structural performance [20], fresh and microstructural properties [21], physio-mechanical properties [22], permeability [23] and fire resistance [24]. Moreover, in the literature, a variety of nano-materials like nS [18][19][20][21][22][23][24][25][26][27], nano-alumina [28], nano-titanium oxide [29], nano-clay [30], nano-metakaolin [31] and carbon nanotubes [32] were used in GPC. Among them, the most widely used nanomaterial is the nS due to its chemical composition that has the nano-filing effect and pozzolanic reactivity [33,34].…”

Section: Nanomaterials In Gpcmentioning

confidence: 99%

Fresh and Mechanical Characteristics of Eco-efficient GPC Incorporating Nano-silica: An Overview

Sharif¹

2021

KJAR

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Nanotechnology can be regarded as one of the most active studies regions with both novel technological know-how and useful packages which have gradually received attention, especially over the past two many years. The nanotechnology development offers new performance to the materials. Recently efforts have been made to incorporate nanoparticles in construction materials to enhance properties and produce concrete with improved performance. progress in the improvement of geopolymer concrete is fast becoming a feasible alternative to conventional cement-based totally concrete because geopolymer concrete is measured as an eco-efficient green concrete that consumes a large quantity of commercial and agro byproduct substances consisting of fly ash, floor granulated blast furnace slag, rice husk ash. To improve the overall performance of geopolymer concrete several methods have been investigated including using nanomaterials to enhance the chemical reactivity of the geopolymer concrete mixture and provide fine particles to fill nanopores and voids. In this paper, a state-of-the-art review was carried out on the impact of nano-silica inclusion on the fresh and the mechanical characteristics of geopolymer concrete. So that current and The majority of the most current studies previously published were investigated to draw attention to the influences of nano-silica on the workability, compressive strength, splitting tensile strength, and flexural strength. Based on the analyzed data, the incorporation of nano-silica affected the fresh properties adversely while improves the mechanical performance up to the appropriate dosage of geopolymer concrete.

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“…In the study of Van Der Wegen et al [55], wherein MIBA was used as aggregate, higher chloride ion penetration had also been observed with increasing replacement level. Conventional fly ash presents pozzolanic activity in the presence of the products of hydration of cement, the result of which decreased the penetration of chloride ions [56]. MIBA, on the other hand, apart from presenting little pozzolanicity, which translates into little additional products of hydration, also led to a greatly porous microstructure, due to the oxidization of aluminium, that facilitated the diffusion of chloride ions.…”

Section: Chloride Ion Migrationmentioning

confidence: 99%

Binary Mixes of Self-Compacting Concrete with Municipal Solid Waste Incinerator Bottom Ash

Simões

Silva

2021

Applied Sciences

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With the objective of establishing a viable alternative to the use of cement, the main objective of this study is to verify the possibility of using municipal solid waste incinerator bottom ash (MIBA) as a partial cement replacement, thereby reducing the environmental impact associated with the use of concrete as a building material. To this end, self-compacting concrete (SCC) binary mixes of cement and MIBA were evaluated in their fresh and hardened state (i.e., self-compactability, mechanical and durability related performance). Four SCC mixes were produced to cover a wide range of replacement levels of cement with MIBA, namely: 20%, 30%, 40% and 50%. A fifth SCC mix, without MIBA, was produced with 30% fly ash to carry out a comparative analysis with composites with well-established performance. The results showed that the use of bottom ash from municipal solid waste incinerators caused an overall decline in the performance of self-compacting concrete. Apart from the smaller number of reactive phases in the bottom ash when compared with fly ash, which led to a slower rate of strength development, the decline was also caused by the increased porosity from the oxidation of aluminium particles. Nevertheless, the results showed promising indicators regarding the durability of mixes with 20% MIBA, with values very similar to those of reference concrete.

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Performance evaluation of self-compacting concrete containing fly ash, silica fume and nano titanium oxide

Cited by 13 publications

References 13 publications

Photoactive Cements: A Review

Photoactive Cements: A Review

Fresh and Mechanical Characteristics of Eco-efficient GPC Incorporating Nano-silica: An Overview

Binary Mixes of Self-Compacting Concrete with Municipal Solid Waste Incinerator Bottom Ash

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