Natural Pozzolans a Comparative Study: A Review

Shukla, Ashish; Gupta, Nakul; Goel, Rajesh Kumar; Kumar, Sanjeev

doi:10.1088/1757-899x/804/1/012040

Cited by 34 publications

(8 citation statements)

References 49 publications

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“…NPs are widely used as a supplementary cementing materials which can establish promised outcomes in grasping the expansion of cementitious materials [28,29]. That is through using as a partial substitution of cement by NP to reduce cement consumption and at the same time improve concrete performance [30][31][32][33][34][35][36][37][38]. Besides these, the employment of NP is beneficial in the reduction of deformations while improving the compressive strength of concrete [14,30,35,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

“…Also, NP can improve concrete resistance to chloride ion penetration which is directly indicated by electric resistivity and durability of concrete by reducing shrinkage cracks and significantly reducing crack width of concrete matrices [1,12,[54][55][56]. In addition to these, increasing the content of NP in concrete increases resistance of chloride ion migration [57], and decreases permeability and water absorption which can improve the long-term strength gain of concrete [1,36,[58][59][60]. That is due to natural pozzolanic powder can higher the tortuosity of the pore thereby preventing the permeability or absorption of water into the concrete matrix [61].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

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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“…However, finding practical natural substitutes that perform similarly to FA to improve mechanical and rheological concrete properties is essential because upcoming environmental and safety laws threaten its availability and quality. Therefore, there has been a great trend recently to use Natural Pozzolana (NP) as a natural material resulting from volcanoes with variable mineral, chemical and reactivity properties (Hossain et al, 2021;Shukla et al, 2020;Camacho et al, 2002;Ghrici et al, 2007). In addition to its abundance in different geographical locations, it is an economically viable option as a supplementary cementitious material in concrete production (Khan & Alhozaimy, 2011).…”

Section: Introductionmentioning

confidence: 99%

A Comparison between Natural Pozzolana and Fly Ash Replacements on the Mechanical Properties of Concrete

Aburumman,

Al-diseet,

Mohsen

et al. 2023

The International Conference on Civil Infrastructure and Construction

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This study investigates the effect of Natural Pozzolana (NP) and Fly Ash (FA) substitutes on concrete's mechanical and microstructural properties. Mixes containing 10 - 50 % cement substitute ratios were prepared and tested for flexure and compressive strength after 28 days of curing. Then, qualitative microstructural analysis was performed using Scanning Electron Microscope (SEM). In terms of compressive strength, the mixes containing only 10 % replacement ratios of both NP and FA showed an improvement of 10 % compared to the plain control mix. On the other hand, all mixes containing FA could attain at least a 25 % development in their flexural strength compared to the control mix. The microstructural analysis illustrated that adding FA and NP enhances cement hydration by improving the formation of dense hydration products such as calcium silicate hydrate (C-S-H) and calcium hydroxide (C-H), which are mainly responsible for the performance of the improved mechanical properties of concrete.

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“…In a similar vein, the compression strength of Bio-Concrete was the subject of a great deal of research in order to evaluate the efficacy of bacteria-based self-healing in the existing body of scholarly work. is is due to the fact that the strength of concrete is regarded as an essential metric that represents the uniformity of a concrete mix as well as the components of the material being used [18][19][20]. e compressive strength test has a direct bearing on the general performance of the concrete as well as its attributes.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Bio Concrete by Cluster and Regression Analysis for Environment Protection

Shukla

Gupta

Singh

et al. 2022

Computational Intelligence and Neuroscience

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The focus of this research is to isolating and identifying bacteria that produce calcite precipitate, as well as determining whether or not these bacteria are suitable for incorporation into concrete in order to enhance the material’s strength and make the environment protection better. In order to survive the high “potential of hydrogen” of concrete, microbes that are going to be added to concrete need to be able to withstand alkali, and they also need to be able to develop endospores so that they can survive the mechanical forces that are going to be put on the concrete while it is being mixed. In order to precipitate CaCO3 in the form of calcite, they need to have a strong urease activity. Both Bacillus sphaericus and the Streptococcus aureus bacterial strains were evaluated for their ability to precipitate calcium carbonate (CaCO3). These strains were obtained from the Department of Biotechnology at GLA University in Mathura. This research aims to solve the issue of augmenting the tension and compression strengths of concrete by investigating possible solutions for environmentally friendly concrete. The sterile cultures of the microorganisms were mixed with water, which was one of the components of the concrete mixture, along with the nutrients in the appropriate proportions. After that, the blocks were molded, and then pond-cured for 7, 28, 56, 90, 120, 180, 270, and 365 days, respectively, before being evaluated for compressibility and tensile strength. An investigation into the effect that bacteria have on compression strength was carried out, and the outcomes of the tests showed that bacterial concrete specimens exhibited an increase in mechanical strength. When compared to regular concrete, the results showed a maximum increase of 16 percent in compressive strength and a maximum increase of 12 percent in split tensile strength. This study also found that both bacterial concrete containing 106, 107, and 108 cfu/ml concentrations made from Bacillus sphaericus and Streptococcus aureus bacteria gave better results than normal concrete. Both cluster analysis (CA) and regression analysis (RA) were utilized in this research project in order to measure and analyze mechanical strength.

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Natural Pozzolans a Comparative Study: A Review

Cited by 34 publications

References 49 publications

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

Effect of Natural Pozzolana on Physical and Mechanical Properties of Concrete

A Comparison between Natural Pozzolana and Fly Ash Replacements on the Mechanical Properties of Concrete

Performance Evaluation of Bio Concrete by Cluster and Regression Analysis for Environment Protection

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