A comparative study of natural pozzolan and fly ash: Investigation on abrasion resistance and transport properties of self-consolidating concrete

Sharbaf, MohammadReza; Najimi, Meysam; Ghafoori, Nader

doi:10.1016/j.conbuildmat.2022.128330

Cited by 20 publications

(3 citation statements)

References 28 publications

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“…Material measures that can be taken to mitigate frost-related problems are, for example, adjustments of the water-cement ratio, increasing the air content, and addition of supplementary cementitious materials, as discussed in Table 4. Some other important or recent advancements in concrete mix design include the development of new concrete materials such as ultra-high-performance concrete [157], self-consolidating concrete [158], fiber-reinforced concrete [159], and nanotechnologically enhanced concrete [160].…”

Section: Advanced Concrete MIX Designsmentioning

confidence: 99%

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Nilimaa

Zhaka

2023

Eng

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Cold weather conditions pose significant challenges to the performance and durability of concrete materials, construction processes, and structures. This paper aims to provide a comprehensive overview of the material-related challenges in cold weather concrete construction, including slow setting, reduced curing rate, and slower strength development, as well as frost damage, early freezing, and freeze–thaw actions. Various innovative materials and technologies may be implemented to address these challenges, such as optimizing the concrete mix proportions, chemical admixtures, supplementary cementitious materials, and advanced construction techniques. The paper also examines the impact of weather-related challenges for personnel, equipment, and machinery in cold environments and highlights the importance of effective planning, communication, and management strategies. Results indicate that the successful implementation of appropriate strategies can mitigate the challenges, reduce construction time, and enhance the performance, durability, and sustainability of concrete structures in cold and freezing temperatures. The paper emphasizes the importance of staying updated about the latest advancements and best practices in the field. Future trends include the development of smart and functional concrete materials, advanced manufacturing and construction techniques, integrated design, and optimization of tools, all with a strong focus on sustainability and resilience.

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Section: Advanced Concrete MIX Designsmentioning

confidence: 99%

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Nilimaa

Zhaka

2023

Eng

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“…Furthermore, increasing the fineness of NP in concrete decreases the slump flow and increases the viscosity [50,62]. However, it can improve the flow ability, passing ability, and place ability of concrete [63,64]. In addition to these, incorporating NP in concrete significantly lowers the heat of reactions which can give an enormous advantage in mass concrete production by making a denser microstructure of concrete [51,[65][66][67].…”

Section: Introductionmentioning

confidence: 99%

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

Fode,

Jande,

Kivevele

2024

Advances in Civil Engineering

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Construction industries are rapidly growing, sacking high amounts of concrete which has a highly dense microstructure with excellent mechanical properties, more durable, and highly eco-friendly materials. Hence, many of the researchers are interested in solving this problem with replacing concrete by natural pozzolana (NP) which is a supplementary cementitious material mostly from volcanic sources having much active silica content that can improve the durability and mechanical properties of concrete. However, it is not well-known which common optimum replacement range can give the most desirable concrete properties. So, the present study sought to review the effects of replacing NP from volcanic sources on the durability, physical, mechanical, and microstructural properties of concrete, also, to identify the most common dose of a positive effect as a replacement in concrete. The review shows that many of NP used by different literature from different places satisfy ASTM replacement standard in concrete, especially, based on its chemical compositions. Also, the review observed that employing NP in concrete significantly improves concrete workability, lengthens setting time, and reduces bulk density, porosity, water absorption, and chloride ion migration by making denser concrete microstructure. In general, adding 5%–20% of NP in concrete significantly improves compressive strength, split tensile strength, and flexural strength. Specifically, most of the studies found 15% replacement of NP having volcanic sources can give optimum strength. Besides these, most of the studies indicated that the improvement of the strength was more visible at the concrete age of 7–28 days.

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“…Many authors note that ash as a pozzolan in concrete shows the same effect as a natural pozzolan, which indicates its great potential for use. It was shown in [ 11 ] that the use of ash contributes to the improvement of characteristics in terms of mechanical properties, especially at later stages of artificial stone hardening. Researchers also use natural pozzolans and ash together in the composition, which in turn achieves the best concrete characteristics [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

et al. 2023

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The article considered the issues of the modification of gypsum stone to improve its performance properties. The influence of mineral additives on the physical and mechanical characteristics of the modified gypsum composition is described. The composition of the gypsum mixture included slaked lime and an aluminosilicate additive in the form of ash microspheres. It was isolated from ash and slag waste from fuel power plants as a result of their enrichment. This made it possible to reduce the carbon content in the additive to 3%. Modified compositions of the gypsum composition are proposed. The binder was replaced with an aluminosilicate microsphere. Hydrated lime was used to activate it. Its content varied: 0, 2, 4, 6, 8 and 10% of the weight of the gypsum binder. Replacing the binder with an aluminosilicate product for the enrichment of ash and slag mixtures made it possible to improve the structure of the stone and increase its operational properties. The compressive strength of the gypsum stone was 9 MPa. This is more than 100% higher than the strength of the control composition of gypsum stone. Studies have confirmed the effectiveness of using an aluminosilicate additive—a product of enrichment of ash and slag mixtures. The use of an aluminosilicate component for the production of modified gypsum mixtures allows the saving of gypsum resources. Developed formulations of gypsum compositions using aluminosilicate microspheres and chemical additives provide the specified performance properties. This makes it possible to use them in the production of self-leveling floors, plastering and puttying works. Replacing traditional compositions with a new composition based on waste has a positive effect on the preservation of the natural environment and contributes to the formation of comfortable conditions for human habitation.

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A comparative study of natural pozzolan and fly ash: Investigation on abrasion resistance and transport properties of self-consolidating concrete

Cited by 20 publications

References 28 publications

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

The Use of Aluminosilicate Ash Microspheres from Waste Ash and Slag Mixtures in Gypsum-Lime Compositions

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