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Journal articles on the topic 'Pozzolanic reactivity'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Vyšvařil, Martin. "Monitoring the reactivity of pozzolans by thermogravimetric method." Acta Polytechnica CTU Proceedings 53 (July 12, 2025): 102–7. https://doi.org/10.14311/app.2025.53.0102.

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This work focuses on comparing the effect of ten different types of pozzolans on the strength of lime pastes in relation to their pozzolanic activities as determined by the Chapelle test and monitoring the reactivity of these pozzolans using the thermogravimetric method. It was found that the Chapelle test can in some cases overestimate the reactivity of the pozzolan due to differences between the conditions during the test and in reality. The strengths of lime-pozzolan pastes did not correlate well with the pozzolanic activity values of the pozzolans used. On the contrary, the amount of react

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2

Shi, Caijun. "An overview on the activation of reactivity of natural pozzolans." Canadian Journal of Civil Engineering 28, no. 5 (2001): 778–86. http://dx.doi.org/10.1139/l01-041.

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Natural pozzolan is one of the oldest construction materials. Lime-pozzolan cements have been used for several thousands of years and have an excellent reputation for their durability. Pozzolans are being widely used as a cement replacement in Portland cement concrete. The use of pozzolans has the advantage of lower costs and better durability, but the disadvantage of a longer setting time and a slower early strength development. Different techniques have been tried to increase the reactivity of natural pozzolans to overcome these disadvantages. This paper has reviewed various methods used to

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3

Juimo Tchamdjou, Willy Hermann, Sophie Grigoletto, Frédéric Michel, Luc Courard, Toufik Cherradi, and Moulay Larbi Abidi. "Effects of Various Amounts of Natural Pozzolans from Volcanic Scoria on Performance of Portland Cement Mortars." International Journal of Engineering Research in Africa 32 (September 2017): 36–52. http://dx.doi.org/10.4028/www.scientific.net/jera.32.36.

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The aim of this paper is to assess the possibility of using natural pozzolans (NPs) from Cameroonian volcanic scoria as supplementary cementitious materials (SCMs) in the production of Portland cement mortars. Four natural pozzolans (Black Natural Pozzolan: BNP, Dark-Red Natural Pozzolan: DRNP, Red Natural Pozzolan: RNP and Yellow Natural Pozzolan: YNP) with 3600, 4500, 4700 and 5200 cm2/g Blaine fineness respectively were produced from different colors (Black, Dark red, Red and Yellow) volcanic scoria in a laboratory mill. Natural pozzolans were characterized with regard to particle size dist

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4

Pontes, Jorge, António Santos Silva, and Paulina Faria. "Evaluation of Pozzolanic Reactivity of Artificial Pozzolans." Materials Science Forum 730-732 (November 2012): 433–38. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.433.

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Pozzolanicity is a very interesting issue regarding building materials, as a way to enhance mortars and concrete durability. This property results from the reaction between calcium hydroxide and silica and alumina based materials. Different types of natural and artificial pozzolans show pozzolanic activities that differ depending on the materials characteristics. Therefore, the study of this property, namely its reactivity with calcium hydroxide, reveals itself to be important in the selection of the type and content of these materials. This paper presents the results of several pozzolanic rea

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5

Merida, Ahcene, and Fattoum Kharchi. "Corrosion of the Pozzolan Concrete in Sulfates." Advanced Materials Research 911 (March 2014): 494–98. http://dx.doi.org/10.4028/www.scientific.net/amr.911.494.

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Sulfate attack and its effects are important from both scientific and industrial viewpoints. Itis perceived that cements containing pozzolan have better performance in sulfate solutions,since the pozzolanic reactions reduce the quantity of calcium hydroxide and increasecalcium silicate hydrate. This paper investigates the physical and mechanical properties ofconcretes made by blended cement containing Algerian natural pozzolan of volcanic origin, and Portland cement. in order to better determine the pozzolanic effect of the pozzolan addition in the concrete, the analysis of the experimental re

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Sierra, Oscar M., Jordi Payá, José Monzó, María V. Borrachero, Lourdes Soriano, and Javier Quiñonez. "Characterization and Reactivity of Natural Pozzolans from Guatemala." Applied Sciences 12, no. 21 (2022): 11145. http://dx.doi.org/10.3390/app122111145.

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The possibility of using pozzolanic materials as a partial substitute for Portland cement (PC) to develop mortars and concretes promotes environmental and economic benefits. The present paper includes an in-depth investigation into the characterization of natural pozzolans from Guatemala for the valorization of these materials. An exhaustive physico-chemical characterization of the starting materials was first carried out. Second, an analysis of the pozzolanic reactivity of both pozzolans was performed using an evolution test of the pH and electrical conductivity measurements and a Frattini te

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7

Likes, Lauren, Ananya Markandeya, Ali Zarei, et al. "Recycled Glass Powder Produced by Steel and Ceramic Milling as a Supplement to Portland Cement for More Sustainable Concrete." Advances in Civil Engineering Materials 14, no. 1 (2025): 23–53. https://doi.org/10.1520/acem20230142.

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Abstract This study demonstrates the successful use of eco-friendly recycled glass powders (RGPs) in mortar and concrete as pozzolanic substitute for portland cement. As part of the evaluation, two RGPs were produced by steel and ceramic ball mills, namely, RGP (SB) and RGP (CB), respectively. Also included in the experiment as a reference was a commercial ceramic ball-milled RGP. All three evaluated RGPs were found to be reactive pozzolans based on a series of reactivity test results, including a strength activity index of greater than 80 % on all ages of 7, 28, and 56 days in mortar and conc

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8

Villar-Cociña, Ernesto, Moisés Frías, Holmer Savastano, et al. "Quantitative Comparison of Binary Mix of Agro-Industrial Pozzolanic Additions for Elaborating Ternary Cements: Kinetic Parameters." Materials 14, no. 11 (2021): 2944. http://dx.doi.org/10.3390/ma14112944.

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In this research work, the quantitative characterization of a binary blend comprised of two pozzolans (sugar cane straw (SCSA)–sugar cane bagasse ashes (SCBA), bamboo leaf ash (BLAsh)–SCBA and paper sludge (PS)–fly ash (FA)) taking into account the calculated values of the kinetic parameters of the reaction in the pozzolan/calcium hydroxide system is shown. The paper shows the most significant and important results obtained by the authors in the quantitative assessment (calculation of kinetic parameters) of the pozzolanic reaction of different mixtures of pozzolanic materials that are residues

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9

Lim, Chung Han. "Enhancing the Pozzolanic Reactivity of Spent Bleaching Earth Ash (SBEA) in Binary Blended Cement Mortar through Calcination." ASM Science Journal 17 (November 21, 2022): 1–11. http://dx.doi.org/10.32802/asmscj.2022.1292.

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The effects of calcination on spent bleaching earth ash (SBEA) were investigated in terms of its contribution to pozzolanic reactivity as well as the strength of blended cement mortar when used as partial cement substitution. SBEA waste, which is plentiful in the global stock, showed some potential as pozzolanic material to reduce reliance on the traditional clinker cement. However, actual research on its use as cement replacement and how it may benefit from calcination was still very limited. This paper can conclude that SBEA contains sufficient silica and alumina oxides as well as satisfacto

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Lim, Andrew, Abdul Karim Mirasa, Hidayati Asrah, and Xiaoping Tian. "MAXIMIZING VOLUME OF SPENT BLEACHING EARTH ASH (SBEA) POZZOLAN USED AS CEMENT REPLACEMENT IN MORTAR THROUGH MECHANICAL ACTIVATION." Jurnal Teknologi 84, no. 5 (2022): 105–16. http://dx.doi.org/10.11113/jurnalteknologi.v84.18177.

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Spent bleaching earth ash (SBEA) is harmful waste from the oil refining industry that has previously exhibited pozzolanic properties and potential for use as cement replacement. Conventional pozzolanic replacements in cements are typically limited to 30 % only as excessive amounts have detrimental on cement strength. This research aimed to investigate the feasibility of increasing the level of replacement past 30 % through mechanical activation. Preliminary investigations revealed that SBEA contains sufficient silica and alumina oxides to be classified as Class N pozzolan in accordance with AS

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Yagüe García, Santiago, and Cristina González Gaya. "Reusing Discarded Ballast Waste in Ecological Cements." Materials 12, no. 23 (2019): 3887. http://dx.doi.org/10.3390/ma12233887.

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Numerous waste streams can be employed in different cement production processes, and the inclusion of pozzolans will, moreover, permit the manufacture of concrete with improved hydraulic properties. Pozzolanic materials can be added to Ordinary Portland Cement (OPC) in the range of 10%–20% by mass of cement. One such example is the phyllosilicate kaolinite (K), and its calcined derivative metakaolin (MK), incorporated in international cement manufacturing standards, due to its high reactivity and utility as a pozzolan. In the present paper, discarded ballast classed as Construction and Demolit

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12

Malathy, Ramalingam, Ragav Shanmugam, Ill-Min Chung, Seung-Hyun Kim, and Mayakrishnan Prabakaran. "Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash." Processes 10, no. 7 (2022): 1424. http://dx.doi.org/10.3390/pr10071424.

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A mixture of hydraulic lime and pozzolanic material can be used as a binder in making concrete and mortar for energy-efficient construction purposes. Generally, lime possesses lower strength and higher setting time. By introducing pozzolans in the lime mortar, their cementitious properties could be increased and could compete with the cement mortars. The use of pozzolan-lime binder in mortar reduces the utilisation of cement, and hence reduces the environmental problem originating from cement production. This study mainly deals with the mechanical and microstructural properties of lime and lim

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Lim, Chung Han, and Syaza Syazvina Anwar. "Assessment of Pozzolanic Reactivity for Calcined Spent Bleaching Earth Ash (SBEA) using Strength Activity Index (SAI), Frattini Test and X-Ray Diffraction (XRD)." MATEC Web of Conferences 397 (2024): 03003. http://dx.doi.org/10.1051/matecconf/202439703003.

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This research briefly investigates and compares three different and distinct methods of assessing the pozzolanic reactivity of a cementitious replacement material, Spent Bleaching Earth Ash (SBEA). SBEA is waste by-product of the edible oils refining industry and has some pozzolanic properties that could possibly be enhanced through calcination. Many methods have been developed to assess the reactivity of pozzolans and three of the most common ones were employed in this research; namely the Strength Activity Index (SAI), Frattini Test and X-Ray Diffraction (XRD) methods. These three methods we

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14

Záleská, Martina, Milena Pavlíková, and Zbyšek Pavlík. "Classification of a-SiO₂ Rich Materials." Materials Science Forum 824 (July 2015): 33–38. http://dx.doi.org/10.4028/www.scientific.net/msf.824.33.

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The powder materials containing active SiO2, which are used as pozzolanic active materials in cement mixtures, can be classified in consideration of their pozzolana activity, particle size or reactivity. In this paper, several types of metakaoline are studied using Frattini and modified Chapelle test for pozzolanic activity determination. The particle size analysis is measured using the laser diffraction analyser and the differences in the chemical composition are characterized by FTIR spectroscopy. The obtained data show influence of particle size and chemical composition of tested powders on

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15

Hassan, Maan S. "Adequacy of the ASTM C1240 Specifications for Nanosilica Pozzolans." Open Civil Engineering Journal 13, no. 1 (2019): 42–49. http://dx.doi.org/10.2174/1874149501913010042.

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Background: Nano-silica is a new pozzolan that is boosting the field of nanomaterials and can be used effectively in the concrete industry. ASTM C1240 is used to qualify silica fume pozzolans for use in concrete and for marketing purposes. Objective: The present study aims to assess the adequacy of ASTM C1240 in qualifying nanosilica for use in concrete and to introduce a modified procedure to measure the pozzolanic activity of nanosilica used with cementitious composites. Methods: The effects of various particle sizes and dosages on the compressive strength of blends in standard mortar were i

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16

Poudel, Sushant, Utkarsha Bhetuwal, Prabin Kharel, et al. "Waste Glass as Partial Cement Replacement in Sustainable Concrete: Mechanical and Fresh Properties Review." Buildings 15, no. 6 (2025): 857. https://doi.org/10.3390/buildings15060857.

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The significant anthropogenic carbon dioxide (CO2) emissions from cement production and the disposal of the majority of post-consumer waste glass into landfill sites have increased environmental pollution. In order to reduce the environmental impact, ground glass pozzolan (GGP) as a partial cement replacement has drawn interest from the concrete industry. This review examines the potential of GGP as a supplementary cementitious material (SCM), exploring the chemical composition of pozzolans, the different types of glass used for GGP, and the impact of glass color on pozzolanic reactivity. In a

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17

Quarcioni, V. A., F. F. Chotoli, A. C. V. Coelho, and M. A. Cincotto. "Indirect and direct Chapelle's methods for the determination of lime consumption in pozzolanic materials." Revista IBRACON de Estruturas e Materiais 8, no. 1 (2015): 1–7. http://dx.doi.org/10.1590/s1983-41952015000100002.

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In this work, comments are made about indirect methods and direct Chapelle's method applied to the determination of the reactivity of pozzolanic materials. The Chapelle's method is based on the lime-pozzolan reaction and quantifies the pozzolanic reactivity of any material intended to be applied by the cement industry. This lime consumption determination by the pozzolan through this reaction can be made with mass proportions - lime:pozzolan 1:1, as originally proposed by Chapelle or 2:1, as specified in Brazilian and French Standards. Comparative results with both proportions are presented for

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18

Askarinejad, Azadeh, Ali Reza Pourkhorshidi, and Tayebeh Parhizkar. "Evaluation the pozzolanic reactivity of sonochemically fabricated nano natural pozzolan." Ultrasonics Sonochemistry 19, no. 1 (2012): 119–24. http://dx.doi.org/10.1016/j.ultsonch.2011.05.005.

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19

Danner, Tobias, and Harald Justnes. "The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays." Nordic Concrete Research 59, no. 1 (2018): 1–12. http://dx.doi.org/10.2478/ncr-2018-0011.

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Abstract Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy, the right production conditions can affect the pozzolanic activity of calcined clays. In this paper, the pozzolanic reactivity of two calcined natural clays in dependence of burning temperature, residence time in the furnace, cooling conditions and particle size of the final product is investigated. The highest pozzolanic reactivity was found at calcination temperatures between 600 and 800°C. While different cooling conditions had

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20

Zhang, Min-Hong, and Odd E. Gjørv. "Pozzolanic reactivity of lightweight aggregates." Cement and Concrete Research 20, no. 6 (1990): 884–90. http://dx.doi.org/10.1016/0008-8846(90)90050-8.

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21

Wu, Ya Lei, Jun Jie Yang, Si Chen Li, and Man Wang. "Experimental Study on Mechanical Properties and Micro-Mechanism of All-Solid-Waste Alkali Activated Binders Solidified Marine Soft Soil." Materials Science Forum 1036 (June 29, 2021): 327–36. http://dx.doi.org/10.4028/www.scientific.net/msf.1036.327.

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Utilizing granulated blast furnace slag (GBFS), coal fly ash (FA), and furfural residue incineration ash (FRIA) as pozzolanic materials, then activated with calcium carbide residue (CCR) respectively to prepare all-solid-waste alkali activated binders (ASW binders). The laboratory tests were performed to research the effects of pozzolanic materials with different reactivity on the macro- and micro- characteristics of solidified marine soft soil. Results show that the mechanical properties and alkali-activation process of ASW binders solidified soil was determined mainly by the reactivity of po

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Pereira, A. M., J. C. B. Moraes, M. J. B. Moraes, et al. "Valorisation of sugarcane bagasse ash (SCBA) with high quartz content as pozzolanic material in Portland cement mixtures." Materiales de Construcción 68, no. 330 (2018): 153. http://dx.doi.org/10.3989/mc.2018.00617.

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Portland cement (OPC) production is one of the most contaminating greenhouse gas producing activities. In order to reduce OPC consumption, several alternatives are being assessed, and the use of pozzolanic material is one of them. This paper presents study on the reactivity of sugarcane bagasse ash (SCBA), a residue from sugarcane industry, as a pozzolanic material. In order to evaluate SCBA reactivity, it was mixed in pastes with hydrated lime and OPC, which were microstructurally characterised. These studies showed that SCBA presents some pozzolanic characteristics. Studies on mortars in whi

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Jia, Qiong, Jinsuo Lu, and Jing Yang. "Investigation on the feasibility of resource utilizing drinking water treatment sludge as a pozzolan to prepare cement-based materials." E3S Web of Conferences 267 (2021): 02006. http://dx.doi.org/10.1051/e3sconf/202126702006.

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The characteristics of four kinds of sludge obtained from different drinking water treatment plants in Australia and China were contrastively analyzed in this study using x-ray fluorescence, scanning electron microscopy, and x-ray diffraction. The conducted SAI test determined the pozzolanic reactivity of drinking water sludge ash (DWSA), which was derived from the grinding and calcination of drinking water treatment sludge (DWTS). The results indicated that the Al2O3 and SiO2 were the main components of DWTS, and the main crystalline minerals in DWTS were quartz, kaolinite, and aluminum sulfa

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Frías, Moisés, Ana María Moreno de los Reyes, Ernesto Villar-Cociña, Rosario García, Raquel Vigil de la Villa, and Milica Vidak Vasić. "New Eco-Cements Made with Marabou Weed Biomass Ash." Materials 17, no. 20 (2024): 5012. http://dx.doi.org/10.3390/ma17205012.

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Biomass ash is currently attracting the attention of science and industry as an inexhaustible eco-friendly alternative to pozzolans traditionally used in commercial cement manufacture (fly ash, silica fume, natural/calcined pozzolan). This paper explores a new line of research into Marabou weed ash (MA), an alternative to better-known conventional agro-industry waste materials (rice husk, bagasse cane, bamboo, forest waste, etc.) produced in Cuba from an invasive plant harvested as biomass for bioenergy production. The study entailed full characterization of MA using a variety of instrumental

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Hollanders, Sofie, Rieko Adriaens, Jørgen Skibsted, Özlem Cizer, and Jan Elsen. "Pozzolanic reactivity of pure calcined clays." Applied Clay Science 132-133 (November 2016): 552–60. http://dx.doi.org/10.1016/j.clay.2016.08.003.

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Elyasigorji, Farzaneh, Farhad Farajiani, Milad Hajipour Manjili, et al. "Comprehensive Review of Direct and Indirect Pozzolanic Reactivity Testing Methods." Buildings 13, no. 11 (2023): 2789. http://dx.doi.org/10.3390/buildings13112789.

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The production of portland cement is among the major contributors to greenhouse gas emissions that adversely affect the environment. Identifying sustainable materials to partially replace portland cement in concrete, such as pozzolanic materials, is crucial in addressing this issue. These materials mainly consist of silica and alumina that react with the available calcium hydroxide to form strength-bearing phases such as calcium silicate hydrates. Understanding the degree of pozzolanic reactivity of materials using efficient reactivity test methods is an important consideration. The paper thor

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da Cunha, Armando Lucas Cherem, Jardel Pereira Gonçalves, Frank K. Cartledge, Romildo Dias Toledo Filho, and Jo Dweck. "Evaluation of the Metakaolin Pozzolanic Reactivity in Cement Pastes." Materials Science Forum 591-593 (August 2008): 827–32. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.827.

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The pozzolanic reactivity of a commercial metakaolin (MK) manufactured in Brazil, was evaluated in pastes prepared with a type II Portland cement, when used in cement substitution degrees from 10 to 40 mass % by thermal analysis techniques. The reactivity during the early stages of hydration was studied in real time from Non-Conventional Differential Thermal Analysis curves, normalized by the effect of the specific heats of the raw materials. The total pozzolanic reactivity after 28 days of hydration was evaluated by the calcium hydroxide consumption, calculated from thermogravimetric and deri

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Basar, Imren, David Torrens-Martín, Lucía Fernández-Carrasco, Cristhian Caiza, Joan Martínez-Bofill, and Marcel Hürlimann. "Sample Origin Effect on Chemical Reactivity of Tajogaite Volcanic Ashes for Ancient Mortar Repair." Sustainable Chemistry 6, no. 3 (2025): 18. https://doi.org/10.3390/suschem6030018.

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Volcanic ashes (VA) ejected by the Tajogaite Volcano were studied to determine their potential as pozzolanic materials for construction applications. A representative number of VA samples (15 in total) were collected from different geolocations and altitudes during and immediately after the volcanic eruption, in order to assess their reactivity as a function of position and environmental exposure. Various analytical techniques—XRD, FTIR, and SEM/EDX—were used to determine the initial microstructural composition of the VA samples. Additionally, saturated lime testing and the Frattini test were

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Embong, Rahimah, Andri Kusbiantoro, Azrina Abd Wahab, and Khairunisa Muthusamy. "Soluble Pozzolanic Materials from Coal Bottom Ash as Cement Replacement Material." Key Engineering Materials 879 (March 2021): 68–80. http://dx.doi.org/10.4028/www.scientific.net/kem.879.68.

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Nowadays, intensive research in production of highly reactive pozzolanic materials from industrial waste to replace cement is crucial. This action expected to increase industrial waste recycling rate and at the same time reduce extraction of non-renewable resources of limestone. Unique characteristics of coal bottom ash as one of the industrial based pozzolan gained less popularity because of its low reactivity and heavy metal leaching due to conventional method used for disposal. Therefore, an alternative approach was deliberated in this research to utilize coal bottom ash into soluble form a

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Myint, T. M., and N. Tuntiwiwattanapun. "Evaluation of pozzolanic activity in rice husk biochar and ash activated by ball milling for enhanced cement-based composites." IOP Conference Series: Earth and Environmental Science 1500, no. 1 (2025): 012081. https://doi.org/10.1088/1755-1315/1500/1/012081.

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Abstract Rice husk, an abundant agricultural waste rich in silica (SiO2), is a promising material for use in cement-based composites. When thermally treated, rice husk is converted into rice husk ash (RHA) and rice husk biochar (RHB), both containing silica in different forms (amorphous and crystalline) and ratios that may affect pozzolanic reactivity. This study evaluated the pozzolanic activity of rice husk biochar (RHB) produced at 450°C and 650°C, and rice husk ash (RHA) as well as the effect of ball milling activation, for use in cement-based composites. The X-ray diffraction (XRD) analys

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Menéndez, Esperanza, Cristina Argiz, and Miguel Ángel Sanjuán. "Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement." J 4, no. 3 (2021): 223–32. http://dx.doi.org/10.3390/j4030018.

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Ground coal bottom ash is considered a novel material when used in common cement production as a blended cement. This new application must be evaluated by means of the study of its pozzolanic properties. Coal bottom ash, in some countries, is being used as a replacement for natural sand, but in some others, it is disposed of in a landfill, leading thus to environmental problems. The pozzolanic properties of ground coal bottom ash and coal fly ash cements were investigated in order to assess their pozzolanic performance. Proportions of coal fly ash and ground coal bottom ash in the mixes were 1

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Adamiec, Pierre, Jean-Charles Benezet, and Ali Benhassaine. "Pozzolanic reactivity of silico-aluminous fly ash." Particuology 6, no. 2 (2008): 93–98. http://dx.doi.org/10.1016/j.partic.2007.09.003.

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Benezet, J. C., and A. Benhassaine. "Grinding and pozzolanic reactivity of quartz powders." Powder Technology 105, no. 1-3 (1999): 167–71. http://dx.doi.org/10.1016/s0032-5910(99)00133-3.

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Shi, Caijun, Yanzhong Wu, Chris Riefler, and Hugh Wang. "Characteristics and pozzolanic reactivity of glass powders." Cement and Concrete Research 35, no. 5 (2005): 987–93. http://dx.doi.org/10.1016/j.cemconres.2004.05.015.

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., C. M. G. de Souza. "EVALUATION OF POZZOLANIC REACTIVITY OF CALCINED KAOLINITE." International Journal of Research in Engineering and Technology 03, no. 25 (2014): 209–13. http://dx.doi.org/10.15623/ijret.2014.0325033.

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Pinheiro, Valber Domingos, Jonas Alexandre, Gustavo de Castro Xavier, Markssuel Teixeira Marvila, Sergio Neves Monteiro, and Afonso Rangel Garcez de Azevedo. "Methods for Evaluating Pozzolanic Reactivity in Calcined Clays: A Review." Materials 16, no. 13 (2023): 4778. http://dx.doi.org/10.3390/ma16134778.

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The search for alternative materials to replace ordinary Portland cement has been the object of work that enhances the investigation of the use of pozzolanic materials and the reduction of the carbon footprint with supplementary cementitious materials. However, not all materials are available to meet the large-scale demand for cement replacement. A relevant exception is the calcined clay, a material found worldwide that, when subjected to appropriate heat treatment, presents pozzolanic reactivity and can be used as a supplementary material to cement. This review presents, through a systematic

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Tuter, Rukiye, Cem Baccioglu, Cansel Ozkan, and Leyla Tanacan. "A Research on Developing Zeolite Based Lime Mortars." MATEC Web of Conferences 403 (2024): 03001. http://dx.doi.org/10.1051/matecconf/202440303001.

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Zeolites are aluminosilicate materials that possess a crystalline structure characterized by an interlinked three-dimensional framework of AlO4 and SiO4 tetrahedra. This framework contains open cavities in the form of channels and cages, leading to the designation of zeolites as molecular sieves. The characteristics of molecular sieves enable zeolites to have high adsorption capacity, ion exchange capability, and catalytic properties, which also contribute to improving indoor environmental quality. Zeolites also exhibit pozzolanic reactivity due to their high silica content. These chemical and

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Fares, Galal, and Abdulrahman M. Alhozaimy. "Assessment of Pozzolanic Activity of Ground Scoria Rocks under Low- and High-Pressure (Autoclave) Steam Curing." Materials 15, no. 13 (2022): 4666. http://dx.doi.org/10.3390/ma15134666.

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Two sources of natural scoria rocks were procured and ground for use in concrete as natural pozzolans (NP1 and NP2). The evaluation of their pozzolanic reactivity is carried out using different techniques and approaches. The primary goal of employing these techniques is to monitor the amount of portlandite (CH=Ca(OH)2) consumed during steam curing at low or high pressure. The pozzolanicity of NP powders is determined either directly by monitoring CH variation or indirectly by compressive strength and microstructure development. Autoclave curing is known to stimulate the pozzolanicity of the in

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Rahhal, Viviana Fátima, Mónica Adriana Trezza, Alejandra Tironi, et al. "Complex Characterization and Behavior of Waste Fired Brick Powder-Portland Cement System." Materials 12, no. 10 (2019): 1650. http://dx.doi.org/10.3390/ma12101650.

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Two waste fired brick powders coming from brick factories located in Argentine and Czech Republic were examined as alternative mineral admixtures for the production of blended cements. In pastes composition, local Portland cements (Argentine and Czech) were substituted with 8–40%, by mass, with powdered ceramic waste. For the ceramic waste-Portland cement system, workability, the heat released, pozzolanity, specific density, compressive strength, hydrated phases, porosity, and pore size distribution were tested. The relevance of the dilution effect, filler effect, and pozzolanic activity was a

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Costafreda, Jorge Luis, and Domingo Alfonso Martín. "New Deposit of Mordenite–Clinoptilolite in the Eastern Region of Cuba: Uses as Pozzolans." Molecules 26, no. 15 (2021): 4676. http://dx.doi.org/10.3390/molecules26154676.

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This work describes the newly discovered zeolites in the eastern region of Cuba. In the researched area, there have been no previous studies of natural zeolite exploration. Therefore, the results shown here are new. The main object of this research is to analyse five samples of zeolites and demonstrate their pozzolanic capacity and the possibility of their usage in the industrial manufacturing of pozzolanic cements. The study of the samples was performed by X-ray diffraction (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM). A chemical analysis (CAQ) to determine the quali

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Teker Ercan, Ece Ezgi, Rafał Panek, Maciej Szeląg, Andrzej Cwirzen, and Karin Habermehl-Cwirzen. "The Impact of the High-Energy Grinding of Wood Ash on Its Pozzolanic Activity." Materials 18, no. 13 (2025): 3100. https://doi.org/10.3390/ma18133100.

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Wood ash is a promising supplementary cementitious material (SCM) due to its inherent pozzolanic properties. Intensive grinding has been shown to enhance this aspect and reduce the negative effects of variability in the chemical composition. This study investigated the influence of grinding through ball milling on the pozzolanic properties of wood ash. Four different types of wood ash were studied, each subjected to grinding durations of 10 and 20 min. Coal fly ash was used as a reference material. The pozzolanic activity of raw and ground wood ashes was evaluated using the strength activity i

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Khan, Kaffayatullah, Muhammad Nasir Amin, Muhammad Usman, Muhammad Imran, Majdi Adel Al-Faiad, and Faisal I. Shalabi. "Effect of Fineness and Heat Treatment on the Pozzolanic Activity of Natural Volcanic Ash for Its Utilization as Supplementary Cementitious Materials." Crystals 12, no. 2 (2022): 302. http://dx.doi.org/10.3390/cryst12020302.

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The aim of this study was to investigate the influence of fineness and heat-treatment on the pozzolanic and engineering properties of volcanic ash. To this end, two different fineness levels of volcanic ash, ultra-fine (VAF) and fine (VA), without and after heat treatment at different temperatures (VA550, VA650, and VA750), were partially substituted for cement. In addition to the control (100% cement), five binary mortar mixes, each containing 20% of the different types of volcanic ash (VAF and VA; heat-treated and not), were prepared. First, X-ray fluorescence (XRF), X-ray powder diffraction

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Wang, Lei, Zhen He, and Yun Dong. "Investigation of the Pozzolanic Reaction in Silica Fume-Cement Paste by ²⁹Si MAS NMR." Advanced Materials Research 634-638 (January 2013): 2774–77. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2774.

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Pozzolanic reactivity of silica fume(SF) in silica fume-cement (SFC)pastes was studied by 29Si MAS NMR combined with deconvoluton technique, respectively. The experimental results indicate that SF possess an high pozzolanic reactivity. About 41% of SF at 3d and about 96% at 120d have reacted in a paste with SF of 10% in mass. In the highly alkaline environment of the cement paste, monomers formed after the covalent bonds of Si-O-Si in SF were broken, which can connect C-S-H dimers to form highly polymerized C-S-H, and increase the ACL of C-S-H.

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Weise, Kira, Neven Ukrainczyk, Aaron Duncan, and Eduardus Koenders. "Enhanced Metakaolin Reactivity in Blended Cement with Additional Calcium Hydroxide." Materials 15, no. 1 (2022): 367. http://dx.doi.org/10.3390/ma15010367.

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This study aims to increase the pozzolanic reactivity of metakaolin (MK) in Portland cement (PC) blends by adding additional calcium hydroxide (CH_add) to the initial mixture. Cement paste samples were prepared with PC, MK and water with a water-to-binder ratio of 0.6. Cement replacement ratios were chosen from 5 to 40 wt.% MK. For higher replacement ratios, i.e., 20, 30 and 40 wt.% MK, CH_add was included in the mixture. CH_add-to-MK ratios of 0.1, 0.25 and 0.5 were investigated. Thermogravimetric analysis (TGA) was carried out to study the pozzolanic reactivity after 1, 7, 28 and 56 days of

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Hamadache, M., M. Mouli, F. Dif, N. Bouhamou, and A. S. Benosman. "Non-Destructive Testing for the Evaluation of Pozzolanic Mortar Reinforced to Corrosion." Advanced Materials Research 1064 (December 2014): 42–48. http://dx.doi.org/10.4028/www.scientific.net/amr.1064.42.

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Our work aims to studying the addition of the natural pozzolan located in Beni Saf (Algeria) at non-destructive testing for the evaluation of pozzolan mortar reinforced to corrosion. We chose to study this natural addition because of its low cost and its pozzolanic reactivity. To do this, we have carried out tests on mortars made to Portland cement CEM I 42,5 N and substituted by weight based percentages of different natural pozzolan (10%, 20% and 30%). We have measured the corrosion potential and the corrosion speed of different deadlines. The results indicated that is it possible to highligh

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Bonilla, Mercedes, M. V. Borrachero, J. M. Monzó, Jorge Luís Akasaki, Daniel Ma-Tay, and Jordi Payá. "Study of Pozzolanic Properties of Two Sugarcane Bagasse Ash Samples from Honduras." Key Engineering Materials 668 (October 2015): 357–66. http://dx.doi.org/10.4028/www.scientific.net/kem.668.357.

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It is well known that the combustion of agricultural waste such as rice husk, bamboo leaf and bagasse among others, depending on the combustion process, may produce powders with pozzolanic properties. Two samples of sugarcane bagasse ash (SCBA) from Honduras were studied (from Ingenio Santa Matilde, close to the city of San Pedro Sula, and from Ingenio Los Mangos, close to the city of Choluteca). The samples were physico-chemically characterized and pozzolanic reactivity was checked. Both samples of ash have a chemical composition comprising mainly oxides of silicon, iron and aluminum and have

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Sinthaworn, Suppachai, and Pichai Nimityongskul. "Quick monitoring of pozzolanic reactivity of waste ashes." Waste Management 29, no. 5 (2009): 1526–31. http://dx.doi.org/10.1016/j.wasman.2008.11.010.

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Ramanujam, I. V. Ranga, K. Ramachandra Reddy, and N. Venkata Ramana. "Evaluation of Pozzolanic activity and lime reactivity of fly ash, GGBS, mica powder and pumice as binders." E3S Web of Conferences 529 (2024): 01008. http://dx.doi.org/10.1051/e3sconf/202452901008.

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This article presents the effect of the pozzolanic activity and lime reactivity of various siliceous materials, like fly ash, GGBS (Ground granulated blast furnace slag), mica and pumice powders. The pozzolanic activity is evaluated as per ASTM and lime reactivity test as per IS 1727. Based on the ASTM C311 tests, at 28 days GGBS, pumice and fly ash showed 71%,12% and 9% improvement in strength respectively in comparison with the control mix for 20% replacement of binder. Mica powder showed decrease of strength in comparison with the control mix. It has been observed that all binders satisfy t

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Chong, J. Z., N. M. Sutan, and I. Yakub. "Characterization of Early Pozzolanic Reaction of Calcium Hydroxide and Calcium Silicate Hydrate for Nanosilica Modified Cement Paste." Journal of Civil Engineering, Science and Technology 4, no. 3 (2013): 6–10. http://dx.doi.org/10.33736/jcest.120.2013.

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This study intends to investigate the early pozzolanic reaction of Nanosilica (nS) modified cement paste (NMCP) by the characterization technique of Calcium Hydroxide (CH) and Calcium Silicate Hydrate (C-S-H ) using Fourier Transform Infrared Spectroscopy (FT-IR). NMCP samples were prepared with water-binder ratio of 0.50. nS of 5-15nm particle size were used as 1%, 3% ,5% ,7% and 10% replacement of cement by weight. All samples were cured in the concrete laboratory at daily room temperature (T) and relative humidity (RH) in the range of 18-28oC and 65-90%, respectively. Powdered samples were

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Reiterman, Pavel, and Martin Keppert. "Effect of Ceramic Powder Particle Size Distribution on its Reactivity in Lime-Based Binders." Materials Science Forum 908 (October 2017): 40–44. http://dx.doi.org/10.4028/www.scientific.net/msf.908.40.

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Application of various pozzolanic materials is the current approach to obtain suitable environmental, economic and durability parameters of composites, in which they are used. Considerable interest is focused on the possibilities of finely ground ceramic powder (CP) exhibiting pozzolanic activity. Present paper is aimed at the experimental study on the monitoring of reaction kinetics in lime-ceramic powder system (1:1). Ceramic powders with controlled grading were used. Reaction capacity was assessed in time by means of thermogravimetry. The dominant effect of the finest fractions (up to 0.030

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