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Journal articles on the topic 'Alkali-activated Portland composite cement'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Rovnaník, Pavel, Ivo Kusák, Pavel Schmid, and Patrik Bayer. "A Comparison of the Resistance- and Capacitance-Based Sensing of Geopolymer and Cement Composites with Graphite Filler Under Compression." Materials 18, no. 4 (2025): 750. https://doi.org/10.3390/ma18040750.

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Aluminosilicate binders, such as Portland cement or geopolymers, are generally considered electrical insulators. In order to decrease their electrical resistance, electrically conductive fillers are added. This brings new application possibilities, such as the self-sensing and self-monitoring of smart structures. In this study, three different aluminosilicate composites with the same amount of fine graphite filler (6% with respect to the basic aluminosilicate raw material) were tested for resistance- and capacitance-based self-sensing properties. Portland cement and two geopolymer binders were

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2

Smirnova, Olga M., Ignacio Menendez Pidal, Aleksandr V. Alekseev, Dmitry N. Petrov, and Mikhail G. Popov. "Strain Hardening of Polypropylene Microfiber Reinforced Composite Based on Alkali-Activated Slag Matrix." Materials 15, no. 4 (2022): 1607. http://dx.doi.org/10.3390/ma15041607.

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A comparative study of the fracture features, strength and deformation properties of pseudo strain-hardening composites based on alkali-activated slag and Portland cement matrices with polypropylene microfiber was carried out. Correlations between their compositions and characteristics of stress–strain diagrams under tension in bending with an additional determination of acoustic emission parameters were determined. An average strength alkali-activated slag matrix with compressive strength of 40 MPa and a high-strength Portland cement matrix with compressive strength of 70 MPa were used. The m

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3

Boháčová, Jana, and Lukáš Janalík. "Preparation and Verification of Properties of Alkali-Activated Composite." Solid State Phenomena 296 (August 2019): 209–14. http://dx.doi.org/10.4028/www.scientific.net/ssp.296.209.

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The paper deals to create alkali activated composite based on the recipe of high-strength concrete. The paper includes the review of conditions for high-strength concrete proposing and preparation. Principles of design of high performance concrete based on Portland cement as a binder were described. The experiment was focused on the strength investigation of composites with different ratios of cement to slag, and also the effect of used activator on strength parameters was investigated.

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Krivenko, Pavel V., Myroslav Sanytsky, and Tetiana Kropyvnytska. "The Effect of Nanosilica on the Early Strength of Alkali-Activated Portland Composite Cements." Solid State Phenomena 296 (August 2019): 21–26. http://dx.doi.org/10.4028/www.scientific.net/ssp.296.21.

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Significant reduction of carbon footprint of the construction industry is achieved through the use of composite Portland cements. However, substitution levels of additives in the composite cements are limited due to slow strength development arising from low reactivity of the pozzolana compared to clinker phases especially at the early age. The aim of the study was to evaluate effect of nanosilica on formation of strength properties and structure at the early age. The Portland composite cement containing clinker, granulated blast furnace slag, zeolite tuff as natural pozzolana and limestone wi

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5

Rovnaník, Pavel, and Ivo Kusák. "Electrical Properties of Steel Fibre Reinforced Alkali-Activated Slag Composite." Key Engineering Materials 760 (January 2018): 55–60. http://dx.doi.org/10.4028/www.scientific.net/kem.760.55.

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Alkali-activated slag is an alternative binder to the ordinary Portland cement. In order to improve its tensile properties steel fibres as dispersed reinforcement can be used. Since steel is very good conductor it changes the electrical properties of alkali-activated slag composite that can have a potential to be used as self-sensing material then. In this study up to 20% of steel fibres by mass of the slag was added to alkali-activated slag mortar and the mechanical properties, electrical resistance, capacitance and microstructure of the composites were investigated. The results showed that t

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6

Filazi, Ahmet, Nesrin Kurtoğlu, and Fatih Kural. "The Production of Rice Husk Ash and Blast Furnace Slag-Based Alkali-Activated Composites under High-Temperature Effects." Journal of Advanced Applied Sciences 3, no. 2 (2024): 66–78. https://doi.org/10.61326/jaasci.v3i2.318.

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Alkali-activated concretes offer several advantages over conventional Portland cement-based concretes, including environmental sustainability, cost-effectiveness, and improved permeability. The use of alkali-activated concretes, as a replacement for Portland cement, provides significant environmental benefits, such as reducing carbon dioxide emissions by up to 80%, and facilitates the recycling and reuse of industrial and agricultural by-products. This study focuses on the development of alkali-activated concrete by incorporating industrial by-products like blast furnace slag and rice husk ash

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7

Sithole, Thandiwe, Nelson Tsotetsi, and Tebogo Mashifana. "Synthesis of Ambient Cured GGBFS Based Alkali Activated Binder Using a Sole Alkaline Activator: A Feasibility Study." Applied Sciences 11, no. 13 (2021): 5887. http://dx.doi.org/10.3390/app11135887.

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Utilisation of industrial waste-based material to develop a novel binding material as an alternative to Ordinary Portland Cement (OPC) has attracted growing attention recently to reduce or eliminate the environmental footprint associated with OPC. This paper presents an experimental study on the synthesis and evaluation of alkali activated Ground granulated blast furnace slag (GGBFS) composite using a NaOH solution as an alkaline activator without addition of silicate solution. Different NaOH concentrations were used to produce varied GGBFS based alkali activated composites that were evaluated

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8

Hung, Chi-Che, Yuan-Chieh Wu, Wei-Ting Lin, Jiang-Jhy Chang, and Wei-Chung Yeih. "Effect of Mixture Variables on Durability for Alkali-Activated Slag Cementitious." Materials 11, no. 11 (2018): 2252. http://dx.doi.org/10.3390/ma11112252.

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In this study, the influence of three mixture variables named Sand/Aggregate ratio, Liquid/Binder ratio, and Paste/Aggregate ratio on the cementitious properties were studied. The durability of cementitious including absorption, absorption rate, resistivity, rapid chloride permeability index, and carbonation rate were examined. Results showed that the alkali-activated slag cementitious has superior durability. The trends of influences on the composites properties for these three mixture variables are similar to those for the ordinary Portland cement concrete. It means that the experiences for

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9

Salas Montoya, Andres, Loth I. Rodríguez-Barboza, Fabiola Colmenero Fonseca, Javier Cárcel-Carrasco, and Lauren Y. Gómez-Zamorano. "Composite Cements Using Ground Granulated Blast Furnace Slag, Fly Ash, and Geothermal Silica with Alkali Activation." Buildings 13, no. 7 (2023): 1854. http://dx.doi.org/10.3390/buildings13071854.

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In recent decades, alkali activated and blended cements have attracted great interest worldwide due to their advantages of low energy cost, high strength, and good durability. This study evaluated the effects of replacing 50% of Portland cement with a mixture of three waste materials: ground granulated blast furnace slag (GGBFS), fly ash (FA), and geothermal waste (GS), with and without external alkaline activation, and activated with different alkali agents: 4 and 7% Na2O equivalent of sodium hydroxide, sodium silicate (water glass), and sodium sulfate. After 90 days of curing, samples were c

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10

Ranger, Maxime, and Marianne Tange Hasholt. "Relationship between Chloride Migration, Bulk Electrical Conductivity and Formation Factor of Blended Cement Pastes." Nordic Concrete Research 69, no. 2 (2023): 33–53. http://dx.doi.org/10.2478/ncr-2023-0009.

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Abstract This study investigates the links between the non-steady-state chloride migration coefficient, the bulk electrical conductivity and the formation factor of blended cement paste specimens. 18 different binders were tested: two Portland cements (low- and high-alkali) in combination with limestone filler, fly ash, calcined clay, two biomass ashes, sewage sludge ash and crushed brick, as well as two Portland composite cements. In addition, the latter and the low-alkali Portland cement were tested in concrete as well for comparison. Mixes with high-alkali cement showed better resistance to

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11

Amiraliyev, Baurzhan, Bakhitzhan Taimasov, Ekaterina Potapova, et al. "Heat Treatment of Clay Shales and Their Utilization as Active Mineral Additives for the Production of Composite Cements." Journal of Composites Science 9, no. 6 (2025): 269. https://doi.org/10.3390/jcs9060269.

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A structure of composite cement with 15 wt.% thermally activated clay shales has been developed. The phase composition and properties of aluminosilicate rocks of the Kazakhstan deposits—Mynaral and Kuyuk—have been studied. It has been shown that aluminosilicates are related to clay shales by their composition. The regularities of thermal activation processes of aluminosilicates have been established, and it has been shown that pozzolanic activity increases for all compositions with an increase in the heat treatment temperature from 700 to 900 °C. The clay shale of the Mynaral deposit is charac

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12

Bonilla, Ashley, Mónica A. Villaquirán-Caicedo, and Ruby Mejía de Gutiérrez. "Novel Alkali-Activated Materials with Photocatalytic and Bactericidal Properties Based on Ceramic Tile Waste." Coatings 12, no. 1 (2021): 35. http://dx.doi.org/10.3390/coatings12010035.

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Ceramics tile wastes (CWs) were mechanically conditioned for the preparation of alkali-activated hybrid-cements from CW (90 wt.%) and Portland cement (10 wt.%) mixtures using sodium silicate (SS) + NaOH as alkaline activators. Molar ratios of SiO2/Al2O3 (6.3 to 7.7) and Na2O/SiO2 (0.07 to 0.16) were used. The cements were prepared at room temperature (25 °C) and characterized by mechanical and physical properties and microstructure. The optimized cement was used for the preparation of novel photoactivated composite materials by incorporating 5 and 10 wt.% TiO2 (Ti) and ZnO (Z) nanoparticles, a

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13

Thomsen, René Mossing, Sergio Ferreiro Garzón, Duncan Herfort, Jørgen Skibsted, and Yuanzheng Yue. "Physical performances of alkali-activated portland cement-glass-limestone blends." Journal of the American Ceramic Society 100, no. 9 (2017): 4159–72. http://dx.doi.org/10.1111/jace.14955.

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14

Kaefer, Lucas, Letícia Andreolli Dias, Alice Helena Meinhart, et al. "Evaluation of the Alkali-Aggregate Reaction Mitigation Potential of Alkali-Activated Fly Ash-Based Matrices Containing Different Reactive Aggregates." Key Engineering Materials 948 (June 6, 2023): 117–28. http://dx.doi.org/10.4028/p-u9f987.

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The present study evaluated the use of alkali-activated fly ash-based matrices containing different reactive aggregates (quartz, basalt and limestone) to mitigate the alkali-aggregate reaction (AAR). The fly ash activation was performed with sodium hydroxide (NaOH) solution, with a molar ratio (Na2O/SiO2) of 0.4. Reference matrices were prepared using Portland cement type V (ARI). All composites were prepared with a mass ratio of 1:2.25:0.47 (binder: aggregate: water/agglomerant ratio). The petrographic analyses allowed the identification of potentially reactive phases in the three studied agg

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15

Kothari, Ankit, Karin Habermehl-Cwirzen, Hans Hedlund, and Andrzej Cwirzen. "A Review of the Mechanical Properties and Durability of Ecological Concretes in a Cold Climate in Comparison to Standard Ordinary Portland Cement-Based Concrete." Materials 13, no. 16 (2020): 3467. http://dx.doi.org/10.3390/ma13163467.

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Most of the currently used concretes are based on ordinary Portland cement (OPC) which results in a high carbon dioxide footprint and thus has a negative environmental impact. Replacing OPCs, partially or fully by ecological binders, i.e., supplementary cementitious materials (SCMs) or alternative binders, aims to decrease the carbon dioxide footprint. Both solutions introduced a number of technological problems, including their performance, when exposed to low, subfreezing temperatures during casting operations and the hardening stage. This review indicates that the present knowledge enables

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16

Kharchenko, Alexey I., Vyacheslav A. Alekseev, Igor Ya Kharchenko, and Andrey A. Alekseev. "Application of slag-alkali binders in jet cement grouting for soil consolidation." Vestnik MGSU, no. 6 (June 2019): 680–89. http://dx.doi.org/10.22227/1997-0935.2019.6.680-689.

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Introduction. The study proves actuality of the problem connected with obtaining efficient slag-alkali binders for usage in soil jet cement grouting. Replacement of usual portland cement for a slag-alkali binder in geotechnical underground construction activities allows solving a problem of waste (slag) utilization and increase economic efficiency of the soil jet cement grouting. In view of cement grouting technology features and possibility of usage cementation mixtures with various engineering characteristics for different soil types, a broad nomenclature of slag-alkali compositions can be u

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17

Mintsaev, Magomed, Sayd-Alvi Murtazaev, Madina Salamanova, et al. "Structural Formation of Alkali-Activated Materials Based on Thermally Treated Marl and Na2SiO3." Materials 15, no. 19 (2022): 6576. http://dx.doi.org/10.3390/ma15196576.

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Modern materials science is aimed towards abandoning Portland cement in the production of building materials. The scientific novelty of this study lies in its being the first time a comprehensive study of the structure formation of alkali-activated materials (AAM) based on thermally treated marl and Na2SiO3 is carried out. The tasks for achieving this goal were to characterize the thermally treated marl as a new binder, and to comprehensively research the microstructure, fresh, physical, and mechanical properties of the AAM based on the binder. Received active particles of marl with a smaller

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18

Gandel, R., J. Jeřábek, Z. Marcalíková, and P. Ćmiel. "The effect of NaOH and KOH on the strength-mechanical properties of alkali-activated composites based on granulated blast-furnace slag." Journal of Physics: Conference Series 2792, no. 1 (2024): 012001. http://dx.doi.org/10.1088/1742-6596/2792/1/012001.

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Abstract Alkali-activated systems are a more sustainable alternative to Portland cement concrete. The activation of latently hydraulic and pozzolanic raw materials in these composites is one of the many investigated factors, where the price ratio and the ability to optimally activate the mentioned precursors with the given activator play a major role. The subject of the presented work is a comparison of the influence of NaOH and KOH on the development of the strength-mechanical properties of alkali-activated materials based on granulated blast furnace slag - the secondary raw material of metal

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19

Wu, Ting, Si Tang, Yao-Rong Dong, and Jiang-Hua Luo. "A Review of the Thermal and Mechanical Characteristics of Alkali-Activated Composites at Elevated Temperatures." Buildings 15, no. 5 (2025): 738. https://doi.org/10.3390/buildings15050738.

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Alkali-activated materials (AAMs) are promoted as a sustainable alternative to ordinary Portland cement (OPC). They not only have excellent resistance to high temperatures and chemical corrosion, but they can also help to reduce greenhouse gas emissions and reduce energy consumption. Despite their superior resistance to high temperatures compared to conventional cement-based concretes, studies have indicated that AAMs still face challenges related to performance degradation under elevated temperatures. This paper systematically reviews and summarizes the thermal properties (i.e., thermal expan

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20

Emmanuel, Opara Uchechukwu, Aldi Kuqo, and Carsten Mai. "Non-conventional mineral binder-bonded lignocellulosic composite materials: A review." BioResources 16, no. 2 (2021): 4606–48. http://dx.doi.org/10.15376/biores.16.2.emmanuel.

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The construction industry suffers from unsustainability and contributes more than any other industrial sector to carbon emissions that lead to global warming. Increasing economic and environmental concerns related to conventional energy- and CO2-intensive building materials have propelled the rapid and sustained expansion of research in the area of plant-based inorganic mineral binder-bonded materials for the construction industry. The resulting composites can be qualified as eco-responsible, sustainable, and efficient multifunctional building materials. So far, most of these research efforts

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21

Manzi, Stefania, Luisa Molari, Maria Chiara Bignozzi, Giulia Masi, and Andrea Saccani. "Geopolymeric Composites Containing Industrial Waste Reinforced with Arundo donax Fibers." Buildings 14, no. 5 (2024): 1191. http://dx.doi.org/10.3390/buildings14051191.

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Traditional Portland cement-based composites have a great environmental impact. Alkali-activated binders can offer an alternative, particularly if they can be obtained even partially from waste. Two residuals derived from the finishing steps of the traditional ceramic industry have been used as possible polymerizable sources mixed with metakaolin. Moreover, to contrast the low dimensional stability of alkali-activated materials and their mechanical brittleness, natural fibers derived from the Arundo donax plant have been added to the mortars. The use of renewable natural fibers instead of synt

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22

Nalewajko, Marta. "Research on cement-free composites based on alkaline-activated waste materials." Economics and Environment 86, no. 3 (2023): 453–67. http://dx.doi.org/10.34659/eis.2023.86.3.678.

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The article presents a review of research conducted on cement-free concretes based on alkaline-activated waste materials. Research is conducted in order to create concretes that are in line with the doctrine of sustainable development. Their main assumption is the reuse of recycled materials in newly produced building materials without compromising their properties. In addition, attempts are made to eliminate Portland cement, replacing it partially or completely with fly ashes or metakaolin. Another modification of concrete consists of replacing natural aggregate with artificial aggregate. The

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23

Manzi, Stefania, Luca Baldazzi, and Andrea Saccani. "Formulating Geopolymer Mortars through Construction and Demolition Waste (CDW) Recycling: A Comprehensive Case Study." Materials 16, no. 23 (2023): 7304. http://dx.doi.org/10.3390/ma16237304.

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The overall amount of construction and demolition waste (CDW) is steadily increasing due to urbanization-related phenomena in metropolitan cities. Only a small fraction is recycled to produce new concrete, a practice that would avoid the exploitation of natural aggregates. Furthermore, the Portland cement production process causes the release of high values of CO2 emissions into the atmosphere, increasing the global warming potential. For these reasons, materials alternative to ordinary Portland cement (OPC) are becoming more and more widespread, such as alkali-activated materials, which, when

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24

Dener, Murat, Mehmet Karatas, and Mehrzad Mohabbi. "High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate." Construction and Building Materials 290 (July 2021): 123250. http://dx.doi.org/10.1016/j.conbuildmat.2021.123250.

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25

Lemougna, Patrick Ninla, Guillermo Meza Hernandez, Nicole Dilissen, Felicite Kingne, Jun Gu, and Hubert Rahier. "Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants." Applied Sciences 14, no. 5 (2024): 2081. http://dx.doi.org/10.3390/app14052081.

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Copper slag is an industrial residue with a large unutilized fraction. This study presents the development of alkali-activated composites from a copper slag named Koranel®. The effects of metakaolinite, ordinary Portland cement (OPC) and surfactants were investigated. The reactivity of Koranel with potassium silicate solutions with molar ratio R = SiO2/K2O varying from 1 to 2.75, with 0.25 intervals, was investigated using isothermal calorimetry. The reactivity was relatively low at 20 °C; the reaction started after a few hours with a low silica modulus, to several weeks with the highest silic

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26

Mahmoud Abo El-Wafa. "Comparative evaluation of high- and low-calcium fly ash in alkali-activated slag composites under steam curing conditions." World Journal of Advanced Engineering Technology and Sciences 14, no. 3 (2025): 392–98. https://doi.org/10.30574/wjaets.2025.14.3.0150.

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This study explores the feasibility of utilizing sustainable composites made from alkali-activated slag-fly ash as an eco-friendly alternative to traditional Portland cement. It further evaluates the influence of high-calcium fly ash (HCFA) and low-calcium fly ash (LCFA) on the fresh and hardened properties of alkali-activated slag cement (AASC) composites under steam curing conditions. The fresh properties examination indicates that increasing fly ash (FA) content reduces workability, with HCFA exhibiting a more pronounced slump flow reduction than LCFA. Compressive strength results reveal th

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27

Saccani, Andrea, Luca Baldazzi, and Stefania Manzi. "Effects of Biochar Addition on the Properties of Alkali-Activated Materials." Materials 18, no. 3 (2025): 486. https://doi.org/10.3390/ma18030486.

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The addition of biochar to Portland cement composites has been proven to increase some of the material properties. The effect on alkali-activated materials has not been fully investigated. In this study, different recipes of metakaolin pastes at different biochar amounts are tested. Their physical and mechanical properties are analyzed to understand if any beneficial effects can be found even for alkali-activated binders. The results show that the addition of small amounts of biochar (<2 wt%) increases the compressive strength of metakaolin pastes (+15% after 28 days) and decreases the wate

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28

Lalinde, Luis Felipe, Ana Mellado, María Victoria Borrachero, José Monzó, and Jordi Payá. "Durability of Glass Fiber Reinforced Cement (GRC) Containing a High Proportion of Pozzolans." Applied Sciences 12, no. 7 (2022): 3696. http://dx.doi.org/10.3390/app12073696.

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Glass fiber reinforced cement (GRC) is an excellent composite for architects and engineers because it can be molded to produce laminar panels or to create complicated designs. GRC is a fine concrete reinforced with alkali-resistant glass fibers at 3–5% per mass. However, fiber durability is limited because of the aggressiveness of the alkaline medium produced during Portland cement hydration (effect of portlandite). The objective of this study is to assess GRC with high Portland cement replacement with pozzolans (ground fly ash or a mixture of ground fly ash and sonicated silica fume) in order

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29

Allahverdi, A., M. Akhondi, and M. Mahinroosta. "A composite cement of high magnesium sulphate resistance." Materiales de Construcción 68, no. 330 (2018): 154. http://dx.doi.org/10.3989/mc.2018.11316.

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This study investigates the magnesium sulphate resistance of chemically activated phosphorus slag-based composite cement (CAPSCC). Enough mortar specimens were prepared from phosphorus slag (80 wt.%), type II Portland cement (14 wt.%), and compound chemical activator (6 wt.%) and were exposed to 5% magnesium sulphate solution after being cured. Mortar specimens of both type II and V Portland cements (PC2 and PC5) were also prepared and used for comparison purpose. According to the test results, after 12 months of exposure, PC2, PC5 and CAPSCC exhibited 43.5, 35.2 and 25.2% reduction in compres

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30

Zhao, Yanbing, Caiqian Yang, Kefeng Li, Jing Yang, Zhiren Wu, and Chengyu Yan. "Mechanical Performances and Frost Resistance of Alkali-Activated Coal Gangue Cementitious Materials." Buildings 12, no. 12 (2022): 2243. http://dx.doi.org/10.3390/buildings12122243.

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The coal gangue after composite activation treatment is considered a potential low-carbon and green cementitious material, so the feasibility of employing composite-activated gangue to partially or entirely replace cement for building materials is systematically studied in this paper. The effects of alkali content, slag content, and water-to-binder ratio on the mechanical properties and frost resistance of alkali-activated coal gangue mortar (AACGM) were experimentally investigated. An ESEM was employed to observe the microstructure of the AACGM. Moreover, the microstructure damage to the AACG

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Bondarenko, N., D. Bondarenko, and E. Evtushenko. "STUDY OF THE CHEMICAL INTERACTION OF GLASS FIBER WITH CEMENT HYDRATION PRODUCTS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 5, no. 12 (2021): 119–25. http://dx.doi.org/10.34031/2071-7318-2020-5-12-119-125.

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Reinforcement of concrete with fiberglass improves the performance properties of concrete. The object of the study is fiberglass concrete, where Portland cement or alumina cement is used as a binder, and silica fiberglass is used as a filler. The chemical and phase compositions of Portland cement and alumina cement have been studied. The influence of the products of hydration of Portland cement and alumina cement on the chemical resistance of glass fiber has been investigated. The phase composition of Portland cement and alumina cement after hydration is studied using X-ray phase analysis. It

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32

Kocot, Agnieszka, Andrzej Ćwirzeń, Tomasz Ponikiewski, and Jacek Katzer. "Strength Characteristics of Alkali-Activated Slag Mortars with the Addition of PET Flakes." Materials 14, no. 21 (2021): 6274. http://dx.doi.org/10.3390/ma14216274.

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The production of ordinary Portland cement is associated with significant CO2 emissions. To limit these emissions, new binders are needed that can be efficiently substituted for cement. Alkali-activated slag composites are one such possible binder solution. The research programme presented herein focused on the creation of alkali-activated slag composites with the addition of PET flakes as a partial substitute (5%) for natural aggregate. Such composites have a significantly lower impact in terms of CO2 emissions in comparison to ordinary concrete. The created composites were differentiated by

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33

Özkan, Ömer, and Mehmet Sarıbıyık. "ALKALI SILICA REACTION OF BOF AND BFS WASTES COMBINATION IN CEMENT." Journal of Civil Engineering and Management 19, no. 1 (2013): 113–20. http://dx.doi.org/10.3846/13923730.2012.734854.

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This study reports the results of an experimental study conducted to determine composite cements manufactured with the combination of Basic Oxygen Furnace (BOF) Slag and Blast Furnace Slag (BFS). The overall objective of this work is to determine whether a combination of BOF slag and BFS can be used as a cementations material to produce Composite Portland Cement (CPC). Three groups of cement are produced for testing. The first group contains BOF slag, the second group contains BFS and the last group contains the mixture of BOF slag and BFS together. Physical properties and Alkali Silica Reacti

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34

Balun, Bilal, and Mehmet Karataş. "Influence of curing conditions on pumice-based alkali activated composites incorporating Portland cement." Journal of Building Engineering 43 (November 2021): 102605. http://dx.doi.org/10.1016/j.jobe.2021.102605.

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35

Šimonová, Hana, Libor Topolář, Pavel Rovnaník, Pavel Schmid, and Zbyněk Keršner. "Crack Initiation of Alkali-Activated Slag Based Composites with Graphite Filler." Key Engineering Materials 761 (January 2018): 57–60. http://dx.doi.org/10.4028/www.scientific.net/kem.761.57.

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The alkali-activated slag is an alternative building material to ordinary Portland cement based materials. This type of material is effective in reducing CO2 emissions and energy consumption. Addition of graphite powder increases its electric conductivity, hence, introducing new functionality to building materials such as self-sensing and self-heating properties. In this study, the effect of graphite filler on the crack initiation of alkali-activated slag composite is investigated. The graphite powder was added in the amount of 5, 10 and 15% with respect to the slag mass. Beam specimens with a

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36

Seitl, Stanislav, Vlastimil Bílek, Hana Šimonová, and Zbyněk Keršner. "Mechanical and Fatigue Parameters of Two Types of Alkali-Activated Concrete." Key Engineering Materials 665 (September 2015): 129–32. http://dx.doi.org/10.4028/www.scientific.net/kem.665.129.

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The alkali-activated concrete is prepared as a new potential material for the production of concrete elements developed by ZPSV, a. s. company. Note that civil engineering structures are usually made of ordinary Portland cement (OPC) based concrete but today, the cement industry is responsible for emitting between 6% and 7% of all the CO2 emission into the atmosphere. Therefore, it is essential to seek different binders to provide environmental friendly materials. One possible alternative is the application of alkali-activated concrete. The optimal design of concrete mixture was studied in thi

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Salamanova, Madina, Sayd-Alvi Murtazaev, Magomed Saidumov, Arbi Alaskhanov, Tamara Murtazaeva, and Roman Fediuk. "Recycling of Cement Industry Waste for Alkali-Activated Materials Production." Materials 15, no. 19 (2022): 6660. http://dx.doi.org/10.3390/ma15196660.

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The cement industry is recognized as an environmental nuisance, and so there is a need to not only minimizes the consumption of cement, but also to completely recycle the waste of the cement industry. This paper’s originality lies in the fact that, for the first time, a comprehensive study of the structure formation of alkali-activated materials (AAM) based on aspiration dust and clinker dust has been carried out. The tasks for achieving this goal were to characterize cement production waste as a new binder and comprehensively research the microstructure, fresh, physical, and mechanical proper

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Al Bakri Abdullah, Mohd Mustafa, Ahmad Mohd Izzat, M. T. Muhammad Faheem, et al. "Feasibility of Producing Wood Fibre-Reinforced Geopolymer Composites (WFRGC)." Advanced Materials Research 626 (December 2012): 918–25. http://dx.doi.org/10.4028/www.scientific.net/amr.626.918.

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Wood fibres have long been known as a fibre reinforcement for concrete. Due to its availability and low production cost, this natural fibre has been used in less developed country where conventional construction materials were very expensive. In Japan, the production of these types of composites such as high performance fibre-reinforced cement-based composite (HPFRCB), ultra high performance (UHPFRCB) and strain-hardening (SHCC) fibre-reinforced cement-based composite has been developed rapidly in last decades. Geopolymer, future composite and cement produced by the alkali-activation reaction

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Kraft, Bettina, Rebecca Achenbach, Horst-Michael Ludwig, and Michael Raupach. "Hydration and Carbonation of Alternative Binders." Corrosion and Materials Degradation 3, no. 1 (2022): 19–52. http://dx.doi.org/10.3390/cmd3010003.

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The cement industry gains increasing public attention because of the high CO2 emissions for which it is accountable. One approach to improve the carbon footprint of cement production is the development of alternative binders, which can be produced with less energy consumption. These alternative binders have a reduced clinker to cement ratio or contain no Portland cement at all. For the corrosion protection of the reinforcement, the same requirements apply as for standardized types of cement. To perform this evaluation, a basic understanding is necessary of the products formed during hydration,

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Yoon, Seyoon, and Inhwan Park. "Micropore Structures in Cenosphere-Containing Cementitious Materials Using Micro-CT." Advances in Materials Science and Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/3892683.

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Cenospheres have been recently applied to increase the volume of uniform micropores in hardened cementitious materials. Therefore, application of micro-CT to cenosphere-containing binders will help better understand the micropores formed by cenospheres in the hardened materials. Accordingly, the present study prepared Portland cement paste, alkali-activated fly ash/silica fume, and alkali-activated fly ash with 60% weight replacement by cenospheres and reconstructed their micropore structures using micro-CT. From the pore structure, individual micropores were extracted and analyzed using the p

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Procházka, Lukáš, and Jana Boháčová. "Possibilities of Processing of Slag Aggregate from Heap Koněv." Solid State Phenomena 292 (June 2019): 79–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.292.79.

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The aim of this work is to find out whether the slag aggregates from heap Koněv can be used in hydraulic mixtures based on traditional Portland cement as well as in alternative binders based on alkali activated blast furnace slag.In the experiment the basic physical-mechanical parameters of prepared mixtures were determined and the durability properties of these composites were verified. The composition of the aggregate extract and its influence on the properties of the prepared mixtures and the subsequent determination of the alkaline ions in slag aggregates were also verified.

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Kraft, Bettina, Matthias Müller, Rebecca Achenbach, Horst‐Michael Ludwig, and Michael Raupach. "Carbonation behaviour of concretes with alternative binders at different CO₂ concentrations." ce/papers 6, no. 6 (2023): 1334–41. http://dx.doi.org/10.1002/cepa.3000.

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AbstractIn order to reduce CO2 emissions in the construction sector, alternative binders are attracting more and more attention. Whether these alternative binders contain a lower clinker‐cement ratio or no Portland cement clinker at all, to be truly sustainable they must not compromise durability and must therefore be durable.The progress of carbonation and the associated reduction of the pH value have a major influence on the corrosion protection of steel reinforcement, especially as such “low carbon” concretes are typically less resistant against CO2 exposure. Previous research has shown tha

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Dieckmann, Phoebe, Dirk Mohn, Matthias Zehnder, Thomas Attin, and Tobias T. Tauböck. "Light Transmittance and Polymerization of Bulk-Fill Composite Materials Doped with Bioactive Micro-Fillers." Materials 12, no. 24 (2019): 4087. http://dx.doi.org/10.3390/ma12244087.

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This study investigated the effect of bioactive micro-fillers on the light transmittance and polymerization of three commercially available bulk-fill resin composites. These were mixed with 20 wt% bioactive glass 45S5, Portland cement, inert dental barium glass, or nothing (controls). Composites were photo-activated and light transmittance through 4 mm thick specimens was measured in real time. Moreover, degree of conversion (DC) and Knoop hardness (KHN) were assessed. Light transmittance of all bulk-fill composites significantly decreased (p < 0.05) with addition of 20 wt% bioactive glass

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Azevedo, Adriano, Carolina Lombardi, Luis Tonholo, and Kurt Strecker. "PRODUCTION AND PROPERTIES OF LOW-DENSITY ALKALI-ACTIVATED COMPOSITES BY INCORPORATION OF EXPANDED POLYSTYRENE (EPS)." Rev. LatinAm. Metal. Mat. 42, no. 1 (2022): 3–19. https://doi.org/10.5281/zenodo.7213553.

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The increasing consumption of Portland cement raised concerns about the large amount of CO2generated during its production, Alkali-Activated Materials (AAM) being an alternative for its replacement in some applications. This research investigated the production of lightweight Alkali-Activated Composites (AAC), based on metakaolin and expanded polystyrene (EPS) as an agglomerate. The effects of the amount and size of EPS incorporated in the matrix (18, 35and 53vol.-% and varied average sizes of 0.85, 2.16, and 6.00 mm) were evaluated. Increasing amounts of EPS reduced strength, from 42 MPa to 2

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Barabash, І. V., I. N. Babiy, and K. O. Streltsov. "INTENSIVE SEPARATE TECHNOLOGY AND ITS INFLUENCE ON THE PROPERTIES OF CEMENT-WATER COMPOSITIONS, SOLUTIONS AND CONCRETES ON THEIR BASIS." Modern construction and architecture, no. 2 (December 28, 2022): 44–51. http://dx.doi.org/10.31650/2786-6696-2022-2-44-51.

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The article reviews the issues related to the mechanical activation of Portland cement in the separate technology of the production of concrete mixtures in the production of concrete and reinforced concrete products. Usually, an essential characteristic of composite building materials based on Portland cement and its varieties used in building processes is their rapid setting of strength. Therefore, scientific researches related to the development of technologies aimed at the intensification of cement hydration processes and the growth of the speed of concrete strength gaining are relevant. Th

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Cho, Chang Geun, and Hyun Jin Lim. "Experiments of Green High-Ductile Fiber Low Cementitious Composites." Applied Mechanics and Materials 316-317 (April 2013): 979–82. http://dx.doi.org/10.4028/www.scientific.net/amm.316-317.979.

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The carbon dioxide (CO2) emission during the ordinary Portland cement (OPC) manufacturing process is up to about 7.0 % of global manmade CO2. The OPC is also known to have toxic substances. The purpose of current research is to develop an environmentally green and high-ductile fiber low-cement composite (HDFLC) in which the binder is mixed by replacing the amount of the cement of 60% as the ground granulated blast-furnace slag (GGBS) with or without using alkali activators. The material and mechanical characteristics of the HDFLC were evaluated experimentally by the slump flow, compression, an

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Zhao, Wenhua, Ceyao Ji, Qi Sun, and Qi Gu. "Preparation and Microstructure of Alkali-Activated Rice Husk Ash-Granulated Blast Furnace Slag Tailing Composite Cemented Paste Backfill." Materials 15, no. 13 (2022): 4397. http://dx.doi.org/10.3390/ma15134397.

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At present, the research on rice hull ash and cement-based materials as cementitious materials continues to deepen. Low-cost rice hull ash replaces part of Portland cement, which plays a dual role in saving material costs and improving environmental benefits. In this study, alkali-activated rice husk ash (RHA) and ground granulated blast furnace slag (GGBS) were used to prepare cementitious material. The influence of RHA dosage on the strength, slump degree, and coagulation time of cementitious material was studied. On this basis, tailing was used as an aggregate based on the orthogonal design

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Azevedo, Afonso, Thuany Lima, Noan Simonassi, Matheus Pereira Ribeiro, Fabio Garcia Filho, and Sergio Monteiro. "Piassava Fiber: A Novel Reinforcement for Cement-Based Matrix Composites." Concilium 22, no. 1 (2022): 379–90. http://dx.doi.org/10.53660/clm-150-166.

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The addition of 2 and 5 wt% of piassava fiber, a natural lignocellulosic fiber extracted from a Brazilian palm tree botanically named Attallea funifera, into cement-based matrix composites was investigated. Both alkali-treated piassava fibers by NaOH and non-treated fibers were embedded in Portland cement, lime, and sand to fabricate mortars intended for civil construction. The non-aged fresh mortars were tested for paste consistency, water retention, and relative volume of incorporated air. Preliminary results showed that the addition of NaOH-treated piassava slightly increased the water rete

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Shіshkina, Aleхandra, and Andriy Domnichev. "Ensuring uniformity of strength of fine-grained concrete based on modified composite cement." Eastern-European Journal of Enterprise Technologies 1, no. 6 (127) (2024): 47–53. http://dx.doi.org/10.15587/1729-4061.2024.296898.

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Insufficient determination of the effect of surface-active substances introduced in extremely low concentrations on the formation of the stability of the properties of fine-grained concrete based on composite Portland cements determined the feasibility of conducting research in this area. The studies investigated the influence of the modification of composite cement with water activated by the use of the hydrophilic hydration mechanism. It has been proven that these factors include the type and amount of applied water nano modifiers. The analysis of the study results confirmed that the introdu

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Šimonová, Hana, Barbara Kucharczyková, Vlastimil Bílek, Lucie Malíková, Petr Miarka, and Martin Lipowczan. "Mechanical Fracture and Fatigue Characteristics of Fine-Grained Composite Based on Sodium Hydroxide-Activated Slag Cured under High Relative Humidity." Applied Sciences 11, no. 1 (2020): 259. http://dx.doi.org/10.3390/app11010259.

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A typical example of an alternative binder to commonly used Portland cement is alkali-activated binders that have high potential as a part of a toolkit for sustainable construction materials. One group of these materials is alkali-activated slag. There is a lack of information about its long-term properties. In addition, its mechanical properties are characterized most often in terms of compressive strength; however, it is not sensitive enough to sufficiently cover the changes in microstructure such as microcracking, and thus, it poses a potential risk for practical utilization. Consequently,

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