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Journal articles on the topic 'Hybrid cement'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

du Toit, Grizelda, Elizabet M. van der Merwe, Richard A. Kruger, James M. McDonald, and Elsabé P. Kearsley. "Characterisation of the Hydration Products of a Chemically and Mechanically Activated High Coal Fly Ash Hybrid Cement." Minerals 12, no. 2 (2022): 157. http://dx.doi.org/10.3390/min12020157.

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Cement companies are significant contributors of the planet’s anthropogenic CO2 emissions. With increased awareness of the substantial volume of CO2 emissions from cement production, a variety of mitigation strategies are being considered and pursued globally. Hybrid cements are deemed to be technologically viable materials for contemporary construction. They require less clinker than that for ordinary Portland cement, leading to a decrease in CO2 emissions per tonne of hybrid cement manufactured. The hybrids produced in this study consist of 70% siliceous coal fly ash and 30% Portland cement,

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Barboza-Chavez, Adriagni C., Lauren Y. Gómez-Zamorano, and Jorge L. Acevedo-Dávila. "Synthesis and Characterization of a Hybrid Cement Based on Fly Ash, Metakaolin and Portland Cement Clinker." Materials 13, no. 5 (2020): 1084. http://dx.doi.org/10.3390/ma13051084.

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Hybrid cement has become one of the most viable options in the reduction of CO2 emissions to the environment that are generated by the cement industry. This could be explained by the reduction of the content of clinker in the final mixture and substitution of the remaining percentage with supplementary cementitious materials with the help of an alkaline activation. Following that, properties that are provided by an Ordinary Portland Cement and of a geopolymer are mixed in this type of hybrid material and could be achieved at room temperature. Thereafter, the main objective of this research was

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Shagñay, Segundo, Leticia Ramón, María Fernández-Álvarez, Asunción Bautista, Francisco Velasco, and Manuel Torres-Carrasco. "Eco-Efficient Hybrid Cements: Pozzolanic, Mechanical and Abrasion Properties." Applied Sciences 10, no. 24 (2020): 8986. http://dx.doi.org/10.3390/app10248986.

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One of the most polluting industries is the cement industry and, for this reason, alternative lines of research recommend the use of substitute materials for traditional Portland cement. This study proposes the use of industrial (slag and fly ash) and ceramic wastes for the total or partial replacement of Portland cement in the manufacturing of both alkaline-activated and hybrid cements. To carry out this study and evaluate the behavior of the proposed materials, different mortars were manufactured: Portland cement (CEM I), two alkaline-activated slag systems and six hybrid systems, with an 80

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Frías, Moisés, Manuel Monasterio, and Jaime Moreno-Juez. "Physical and Mechanical Behavior of New Ternary and Hybrid Eco-Cements Made from Construction and Demolition Waste." Materials 16, no. 8 (2023): 3093. http://dx.doi.org/10.3390/ma16083093.

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Construction and demolition waste (CDW) currently constitutes a waste stream with growing potential use as a secondary raw material in the manufacture of eco-cements that offer smaller carbon footprints and less clinker content than conventional cements. This study analyzes the physical and mechanical properties of two different cement types, ordinary Portland cement (OPC) and calcium sulfoaluminate (CSA) cement, and the synergy between them. These cements are manufactured with different types of CDW (fine fractions of concrete, glass and gypsum) and are intended for new technological applicat

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Iskandarova, Mastura, Gulruh Begjanova, Dilshod Mukhitdinov, Zukhra Yakubzhanova, and Burxon Botirov. "Technological foundations for solving problem of metallurgy and TPP waste utilization for development of "Green" technology for composite cements production." E3S Web of Conferences 365 (2023): 01001. http://dx.doi.org/10.1051/e3sconf/202336501001.

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The chemical-mineralogical compositions and physic-chemical properties of slag waste from the Angren TPP and Uzmetkombinat JSC were determined. A Conclusion was issued on their suitability for use as additives in cement and the possibility of using them for producing new types of hybrid additives for the production of composite Portland cements. With different combinations and ratios of Portland cement clinker, natural gypsum stone, and hybrid additives, the compositions of composite Portland cements were obtained and optimized, and Conclusions were issued on their compliance with the requirem

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Bílek, Vlastimil, Filip Khestl, and Pavel Mec. "Hybrid Cements with Non Silicate Activators." Solid State Phenomena 259 (May 2017): 30–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.259.30.

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Hybrid cements represent a relatively new type of binders which combines some of the advantages of Ordinary Portland Cement and an application of mineral admixtures and alkali activation. Hybrid cements form then blends containing a low portion of OPC and a high proportion of mineral additions (such as blast furnace flag, fly ash, metakaoline, ...). This paper discusses the properties of mortars based on carbonate based activators. Mixtures composed from Ordinary Portland Cement, ground granulated blast furnace slag, fly ash and mechanically pre-activated fly ash were optimised with the target

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Martín-Rodríguez, Pablo, Ana Fernández-Jiménez, María del Mar Alonso, Angel Palomo, and Inés García-Lodeiro. "Valorisation of “La Palma” Volcanic Ash for Making Portland-Blended, Alkaline and Hybrid Portland–Alkaline Cements." Materials 17, no. 1 (2024): 242. http://dx.doi.org/10.3390/ma17010242.

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The present work evaluates the feasibility of using volcanic fly ash (VFA) generated by the eruption of the Tajogaite volcano on the island of La Palma (Spain) in 2021, as a precursor in the preparation of cementitious materials with different Portland cement (PC) replacement levels (0%, 30%, 70% and 100%), in the absence (Blended Cement, BC) and presence of an alkaline activator (Hybrid Alkaline Cement, HAC, and Alkaline Cements, AC). Hydration kinetics (isothermal conduction calorimetry), paste mechanical strengths and reaction products were characterised by XRD, FTIR, TG/DTG and BSEM/EDX. T

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Šmilauer, Vít, Lenka Dohnalová, and Pavel Martauz. "Shrinkage and Creep Properties of Low-Carbon Hybrid Cement." Materials 17, no. 17 (2024): 4417. http://dx.doi.org/10.3390/ma17174417.

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Hybrid cements combine clinker with large amount of supplementary cementitious materials while utilizing hydration and alkali activation processes. This paper summarizes shrinkage and creep properties of industrially produced H-cement, containing only 20% of Portland clinker. In comparison with a reference cement CEM II/B-S 32.5 R, autogenous shrinkage is smaller after 7 days, and drying shrinkage is similar at similar times. A different capillary system of H-cement leads to faster water mass loss during drying. Basic and total creep of concrete remains in the standard deviation of B4 and EC2

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Bílek, Vlastimil, Jan Hurta, Petra Done, Libor Zidek, and Tomas Zajdlik. "Hybrid Alkali Activated Concretes - Conception and Development for Practical Application." Solid State Phenomena 249 (April 2016): 3–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.3.

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Hybrid cements represent a relatively new type of binders which combine some of the advantages of Ordinary Portland Cement (OPC), the application of mineral admixtures and alkali activation. Hybrid cements represent blends containing a low portion of OPC and a high proportion of mineral additions (such as blast furnace slag, fly ash, metakaolin ....). The paper is focused on the study of properties of mortars prepared from hybrid cements. Mortars with hybrid cements were prepared for an evaluation of the effects of the dosage and the composition of alkali activator, the dosage of OPC and the r

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Nori, J., S. Kakay, and M. Belayneh. "Effect of SiO₂ and SiO₂/TiO₂ hybrid nanoparticles on cementitious materials." IOP Conference Series: Materials Science and Engineering 1201, no. 1 (2021): 012054. http://dx.doi.org/10.1088/1757-899x/1201/1/012054.

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Abstract In this paper, we report the effect of SiO2 nanoparticle solution on the properties of the neat industry and environmental cements. Moreover, the hybrid SiO2/TiO2 nanoparticles solution impact on the Portland G-class cement. Both destructive and non-destructive tests were used to characterize the properties of the slurries and the cement plugs. Results indicate that the optimum concentration of the nanoparticles improved the elastic, energy absorption, rheological, heat development, and the mechanical load carrying capacity of the cements. The selected optimal nanoparticles concentrat

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Vázquez-Rodríguez, Francisco Javier, Lucio Guillermo López-Yépez, Nora Elizondo-Villarreal, Ana María Guzmán-Hernández, Lauren Yolanda Gómez-Zamorano та Edén Amaral Rodríguez-Castellanos. "The Effect of μ-Limestone Additions on the Mechano-Chemical and Microstructural Properties of Slag and Binary Slag/Ground Fly Ash Alkaline-Activated Binders". Materials 17, № 23 (2024): 5940. https://doi.org/10.3390/ma17235940.

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An alternative approach to reducing the clinker factor, i.e., worldwide CO2 emissions resulting from the production of composite cement, is to replace these materials with supplementary aluminosilicate-based materials that promote the formation of alkali-activated cements, whose elevated temperature resistance, limited permeability, strong binding properties, excellent durability, high chemical corrosion resistance, confinement of toxic waste, and environmentally low impact have attracted a lot of attention in the cement industry. The principal aluminosilicate-based supplementary materials (SC

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Gutiérrez-Orrego, Diego A., Maryory A. Gómez-Botero, and Edwin F. García. "Alkali-Activated Hybrid Cement from Mineral Wool Fiber Waste and OPC." Buildings 13, no. 2 (2023): 354. http://dx.doi.org/10.3390/buildings13020354.

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Cements to replace ordinary portland cement (OPC) are currently being studied due to the high environmental costs of OPC production. One viable alternative is alkali-activated cements, which can be made from pozzolanic materials such as stone wool fiber waste (SW). At present, SW is the most used insulation material in the world, and the disposal and recycling of it is an environmental challenge due to its fibrous nature and low density. In the present work, an alkali-activated cement (AAC) and an alkali-activated hybrid cement (AAHC) were obtained from the alkaline activation of SW. The uncon

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Kovalchuk, Oleksandr, Rostislav Drochytka, and Pavel Krivenko. "Mix Design of Hybrid High-Volume Fly Ash Alkali Activated Cement." Advanced Materials Research 1100 (April 2015): 36–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1100.36.

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Hybrid alkali activated cements based on fly ashes because of their structure and characteristics of phase composition are able to be used in different materials with the unique service properties. The paper is enclosing some specific features of hybrid fly ash alkali activated cement mix design and structure formation in order to achieve materials for different applications.

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Balde, Mamadou Yaya, Jean Marie Kepdieu, Gustave Tchanang, Souleymane Balde, and Chantale Njiomou Djangang. "Doping Portland Cement with Natural Clay and Bauxite Mineral Additives from Débélé: Effects on the Mechanical Strength of Mortars." Advances in Image and Video Processing 12, no. 5 (2024): 43–56. https://doi.org/10.14738/aivp.125.17552.

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In the course of this experimental work, which led to the substitution of Portland cement by 20% by mass of mineral additives, the mechanical compressive strength of hybrid cements was evaluated at different ages: 7, 28, 42 and 90 days. The effect of bauxite on the development of mechanical strength was also assessed. The study showed that the hybrid cements obtained had appreciable mechanical strengths, with values ranging from 14 to 34.6 MPa for the series of mortars containing a single additive, compared with 15 to 36.4 MPa for hybrids containing two mineral additives. This study demonstrat

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Monticelli, F., R. Osorio, C. Mazzitelli, M. Ferrari, and M. Toledano. "Limited Decalcification/Diffusion of Self-adhesive Cements into Dentin." Journal of Dental Research 87, no. 10 (2008): 974–79. http://dx.doi.org/10.1177/154405910808701012.

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Resin cement diffusion into dentin may differ as a function of the pre-treatment regimen. Since self-adhesive cements do not require substrate pre-treatment for luting, penetration of and interaction with the underlying dentin are questioned. We hypothesized that differences in the resin cement diffusion into dentin may exist among current commercial adhesive cements. Composite cylinders were luted on mid-coronal dentinal surfaces by an etch-and-rinse cement (Calibra), a self-etching system (Panavia F 2.0), and 4 self-adhesive cements (Multilink Sprint, Rely X Unicem, G-Cem, Bis-Cem). Dentin/c

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Zhao, Xin, Li Qiu, Deyu Kong, Yangfei Huang, and Jintao Liu. "Effects of Three-Dimensional Graphene–Carbon Nanotube Hybrid on the Mechanical Properties and Microstructure of Cement Paste." Materials 16, no. 19 (2023): 6571. http://dx.doi.org/10.3390/ma16196571.

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This work experimentally studies the mechanical properties and microstructure of cementitious composites reinforced with a three-dimensional graphene–carbon nanotube (CNT) hybrid. Firstly, the graphene–CNT (GC) hybrid is dispersed in cement pastes using ultrasonication and surfactant, and then, the effect of the GC hybrid on the early hydration of the cement pastes is investigated. The experimental results show that adding the GC hybrid shortens the setting stage of cement hydration and accelerates the early hydration process. Moreover, the macro- and micro-mechanical properties of each group

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Valencia-Saavedra, William, Rafael Robayo-Salazar, and Ruby Mejía de Gutiérrez. "Alkali-Activated Hybrid Cements Based on Fly Ash and Construction and Demolition Wastes Using Sodium Sulfate and Sodium Carbonate." Molecules 26, no. 24 (2021): 7572. http://dx.doi.org/10.3390/molecules26247572.

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This article demonstrates the possibility of producing alkali-activated hybrid cements based on fly ash (FA), and construction and demolition wastes (concrete waste, COW; ceramic waste, CEW; and masonry waste, MAW) using sodium sulfate (Na2SO4) (2–6%) and sodium carbonate (Na2CO3) (5–10%) as activators. From a mixture of COW, CEW, and MAW in equal proportions (33.33%), a new precursor called CDW was generated. The precursors were mixed with ordinary Portland cement (OPC) (10–30%). Curing of the materials was performed at room temperature (25 °C). The hybrid cements activated with Na2SO4 reache

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Silva, Elisabete R., Humberto E. Ferreira, Jorge F. J. Coelho, and João C. Bordado. "Hybrid Fibre-Reinforced Cement Composite." Materials Science Forum 730-732 (November 2012): 343–48. http://dx.doi.org/10.4028/www.scientific.net/msf.730-732.343.

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This paper reports the results of a series of experiments carried out to investigate the effectiveness of newly hybrid polyethylene/polypropylene (PP/PE) fibres inclusion in the mechanical performance of cement matrices, with regard to fibres properties and content. The results indicate that, compared with plain cement matrix, the PP/PE fibre-reinforced cement matrices (FRC) revealed improvements on their mechanical performance. Increases of 37 ± 1% on compressive (40.2 MPa) and flexural strengths (8.1 MPa) were obtained for 24 mm fibre length composites containing a rather low fibre’s content

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Abou-Id, Luciana Rigueira, Luís Fernando S. A. Morgan, Gerluza Aparecida Borges Silva, Luiz Thadeu de Abreu Poletto, Lincoln Dias Lanza, and Rodrigo de Castro Albuquerque. "Ultrastructural evaluation of the hybrid layer after cementation of fiber posts using adhesive systems with different curing modes." Brazilian Dental Journal 23, no. 2 (2012): 116–21. http://dx.doi.org/10.1590/s0103-64402012000200005.

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This in vitro study evaluated the adhesive interface of intraradicular fiber glass posts and root dentin using scanning electron microscopy (SEM). Forty-eight single-rooted premolars were randomly divided into 6 groups consisting of chemical, dual, or light cured adhesive systems combined with either chemical or dual cure resin cements. Scanning electron microscopic analysis showed the best results for continuity, density and morphology of the hybrid layer and resin tags for the combination of a self-cure adhesive with self-cure cement resin, followed by a dual-cure adhesive with self-cure cem

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Gebhardt, RF. "Why Performance Standards for Hydraulic Cement?" Cement, Concrete, and Aggregates 15, no. 2 (1993): 119–23. http://dx.doi.org/10.1520/cca10597j.

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Abstract There is currently a significant trend toward performance-oriented specifications for hydraulic cements. A performance specification is one which primarily or exclusively defines what its object does rather than what it is, how it is made, or what it looks like. Performance specifications for cement are not new phenomena; they have been with us from the earliest stages of standards development. The goal has always been what the cement does, but the “trend” to performance “accelerated” in the mid-1970s, driven partly by antitrust considerations. A performance-oriented specification for

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Martauz, Pavel, Vojtěch Václavík, and Branislav Cvopa. "The Properties of Concrete Based on Steel Slag as a By-Product of Metallurgical Production." Key Engineering Materials 838 (April 2020): 10–22. http://dx.doi.org/10.4028/www.scientific.net/kem.838.10.

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This article presents the results of research on the use of unstable steel slag with a fraction of 0/8 mm as a 100% substitute for natural aggregate in concrete production. Two types of cements were used for the production of concrete: Portland cement CEM I 42.5N and hybrid cement H-CEMENT. Both of these cements were produced by the company Považská cementárna, a.s., Ladce. The main objective of this study was to assess the suitable type of binder to be combined with unstable steel slag in the production of concrete composite. The prepared concrete was used to test the properties of a fresh

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Hogancamp, Joshua, and Zachary Grasley. "Dispersion of High Concentrations of Carbon Nanofibers in Portland Cement Mortars." Journal of Nanomaterials 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/9375293.

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This research focuses on creating and maintaining a stable dispersion of carbon nanofibers (CNFs) in portland cement based materials. A microfine cement is used in conjunction with an untraditional dispersion method to encourage and stabilize the dispersion of CNFs in concentrations up to 5% by mass of cement. A computational simulation was utilized to examine an effect called geometric clustering on the dispersion of CNFs among Type I/II and microfine cement grains. The geometric clustering simulation revealed a higher achievable dispersion for microfine cement than for Type I/II cement. Scan

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Flávio Reginato, Vagner, Samara Titon Boccardi, Yasmin Bucco, Victor Pinheiro Feitosa, Atais Bacchi, and Rafael Leonardo Xediek Consani. "Bond Strength to Dentine and Degree of Conversion of Adhesive Systems." European Journal of Dental and Oral Health 3, no. 4 (2022): 1–6. http://dx.doi.org/10.24018/ejdent.2022.3.4.206.

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Objectives: The study evaluated the bond strength, degree of conversion and fracture pattern of the hybrid layer in cement-dentin adhesion techniques. Materials and Methods: Bovine teeth dentin blocks were divided according to the cementation techniques: G1- Conventional three-step adhesive and dual-curing resin cement; G2- One-step self-etch adhesive and dual-curing resin cement; G3-Self-adhesive resin cement; and G4- Self-adhesive primer and dual-curing resin cement. Specimens were submitted to thermal cycling, chemical aging or water storage. Bond strength was evaluated by testing machine;

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Stankovic, Antonije, Jelena Popovic, Marija Nikolic, et al. "An influence of finishing procedures and protective coating on the ultrastructure of conventional and hybrid glass ionomer cement restorations." Serbian Dental Journal 70, no. 3 (2023): 138–46. http://dx.doi.org/10.2298/sgs2303138s.

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Introduction. In addition to the advantages of glass ionomer cements that have led to their wide application, hybrid glass ionomer cements have been developed to overcome the shortcomings in mechanical resistance. The aim of the study was to perform an ultrastructural analysis of restorations made from conventional and hybrid glass ionomer cements after recommended finishing procedures and application of a protective coating. Materials and Methods. This study analyzed 30 samples of conventional glass ionomer cement Fuji IX? and 30 samples of hybrid glass ionomer cement EQUIA Forte HT Fil?. The

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Khadzhiev, Azamat, Muslimbek Abdullaev, Yusufboy Yakubov, and Jumaniyoz Jumaniyozov. "The effect of hybrid mineral additives on the genetic formation and physico-chemical processes of cement composites." E3S Web of Conferences 633 (2025): 08003. https://doi.org/10.1051/e3sconf/202563308003.

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The cement industry is undergoing a transformation towards sustainability, focusing on reducing CO2 emissions and implementing energy-efficient technologies. This study investigates the impact of hybrid mineral additives, including microsilica and ashstone’s slag mixture, on the genetic formation and physico-chemical properties of cement composites. The research highlights the role of hybrid additives in enhancing cement durability, optimizing raw material utilization, and contributing to the green economy. Experimental findings indicate that incorporating 20% hybrid mineral additives reduces

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Ravi, Monisha, Balasubramanian Murugesan, and Kennedy C. Onyelowe. "Performance evaluation of marine and industrial wastes in cement to envelope low carbon environment in manufacturing process." International Journal of Low-Carbon Technologies 18 (2023): 986–98. http://dx.doi.org/10.1093/ijlct/ctad082.

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ABSTRACT The bonding strength of waste recycled cement mortar in a low carbon brick masonry prism is influenced by this study. The disposal of marine and industrial trash has emerged as a serious environmental and ecological concern across the world against the climate action of the United Nations Sustainable Development Goals (UNSDGs) and COP27. The use of alternative waste materials in the cement industry minimizes the carbon footprint in the manufacture, construction and overall building lifespan and enhances low carbon technology. The bonding 1ehaveior of the 3R hybrid cement (oyster shell

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Daniel, Kanchori, Erastus Thoronjo &. Dr., and Jacqueline Omuya Dr. "Analysis of Hybrid Diversification Strategy on Organizations' Performance of Cement Firms in Kenya." International Journal of Business Management and Technology 6, no. 6 (2023): 66–73. https://doi.org/10.5281/zenodo.7686970.

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: Cement manufacturing firms in Kenya have experienced decline in performance. The firms have turned to innovative products diversification such as pre-cast concrete paving blocks and precast molded products. This research purposed to analyse hybrid diversification strategy effect on organizations’ performance of Kenyan cement firms and to ascertain effect of firms` characteristics as a moderator between diversification strategy and organizations’ performance of Kenyan cement firms. The study was backed up by resource-based review theory, the agency theory and the market view theor

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Van Praet, Frank, and Michiel Mulier. "To cement or not to cement acetabular cups in total hip arthroplasty: a systematic review and re-evaluation." SICOT-J 5 (2019): 35. http://dx.doi.org/10.1051/sicotj/2019032.

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Introduction: Total Hip Arthroplasty (THA) in the treatment of primary osteoarthritis of the hip has evolved to a very safe and cost-effective intervention with revision rates below 5% after 10 years. To this day, however, controversy remains on whether or not to cement the acetabular cup. Methods: A comprehensive PubMed search of the English literature for studies published between 2007 and 2018 was performed. Studies comparing the clinical (revision rate, functionality), radiological (wear) or economic (cost) differences between cemented (cemented stem with cemented cup) and hybrid (cemented

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Fan, Jie, Gengying Li, Sijie Deng, Chengwei Deng, Zhongkun Wang, and Zhijun Zhang. "Effect of Carbon Nanotube and Styrene-Acrylic Emulsion Additives on Microstructure and Mechanical Characteristics of Cement Paste." Materials 13, no. 12 (2020): 2807. http://dx.doi.org/10.3390/ma13122807.

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Carbon nanotubes (CNTs) are considered as one of the ideal modifiers of cement materials, since CNTs can improve the mechanical properties of cement paste effectively. However, the interfacial interaction between CNTs and the cement matrix is weak. Moreover, it is difficult to disperse CNTs within cement paste. To overcome these shortages, in this study, CNTs were firstly dispersed into a styrene-acrylic emulsion (SAE). Then the homo-dispersion CNT/SAE emulsion was incorporated into cement paste. The effect of the CNT/SAE hybrid-system on the mechanical properties and microstructure of cement

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Fernández-Jiménez, Ana, Inés García-Lodeiro, Shane Donatello, Olga Maltseva, and Ángel Palomo. "Specific Examples of Hybrid Alkaline Cement." MATEC Web of Conferences 11 (2014): 01001. http://dx.doi.org/10.1051/matecconf/20141101001.

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Nasibulin, Albert G., Sergey D. Shandakov, Larisa I. Nasibulina, et al. "A novel cement-based hybrid material." New Journal of Physics 11, no. 2 (2009): 023013. http://dx.doi.org/10.1088/1367-2630/11/2/023013.

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Xu, G., S. Magnani, G. Mesturini, and D. J. Hannant. "Hybrid polypropylene—glass/cement corrugated sheets." Composites Part A: Applied Science and Manufacturing 27, no. 6 (1996): 459–66. http://dx.doi.org/10.1016/1359-835x(95)00078-g.

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ZOZULYNETS, Viktoriia, and Oleksandr KOVALCHUK. "EFFECT OF ADDITIONAL INPUT OF Na3PO4∙12H2O ON ACID RESISTANCE INDICATORS OF HYBRID ALKALINE CEMENTS." Building constructions. Theory and Practice, no. 12 (June 27, 2022): 65–72. http://dx.doi.org/10.32347/2522-4182.12.2023.65-72.

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This work is devoted to the study of the direct influence of phosphate salt, using theexample of trisodium phosphate (Na3PO4∙12H2O), on the acid resistance index of hybrid alkaliactivated cements. After all, acid resistance is becoming an increasingly important property for cement materials due to a wide range of applications where they are exposed to aggressive acid environments, especially in the chemical and foodindustries. In addition to the above, these include sewage systems, agricultural environments, oilwells, acid rain, and much more.Conventional Portland cement binders are known to b

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Chandrashekar, A. R., and Kannam Praveen. "An Experimental Investigation on Characteristic Properties of Hybrid Fibrous Ferro Cement." IOP Conference Series: Materials Science and Engineering 1255, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1757-899x/1255/1/012017.

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Abstract Ferro-Cement is a notably new material such as cord meshes and cement mortar. This fabric turned into developed via P L Nervi, an Italian architect and engineer, in1940. He revived the idea of Ferro-Cement and used it for building fishing boats. Ferro-Cement is skinny and light weight cement composite, with numerous specific houses. The inclusion of fibers to the concrete can amplify the energy homes of the blended and transfigure the frangible cement blended into more consistent and malleable fabric known as FRC. Yet the both substances consists few draw backs. Both the substances un

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Müller, Werner E. G., Emad Tolba, Shunfeng Wang, et al. "Transformation of Construction Cement to a Self-Healing Hybrid Binder." International Journal of Molecular Sciences 20, no. 12 (2019): 2948. http://dx.doi.org/10.3390/ijms20122948.

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A new biomimetic strategy to im prove the self-healing properties of Portland cement is presented that is based on the application of the biogenic inorganic polymer polyphosphate (polyP), which is used as a cement admixture. The data show that synthetic linear polyp, with an average chain length of 40, as well as natural long-chain polyP isolated from soil bacteria, has the ability to support self-healing of this construction material. Furthermore, polyP, used as a water-soluble Na-salt, is subject to Na+/Ca2+ exchange by the Ca2+ from the cement, resulting in the formation of a water-rich coa

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Nguyen, Tri N. M., Huy Q. Nguyen, and Jung J. Kim. "The Changes in the Inner-Structure and Mechanical Strength of the Composite Cement Materials and Silica-Carbon Nanotube-Nylon 66 Electrospun Nanofibers." Polymers 16, no. 17 (2024): 2475. http://dx.doi.org/10.3390/polym16172475.

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This study presents the feasibility of improving some selected mechanical strengths and the inner-structural analyses of cement matrix by electrospun nanofibers containing nylon 66, nanosilica, and carbon nanotube. The hybrid electrospun nanofibers were fabricated and mixed into ordinary Portland cement. From the mechanical strength test results, the hybrid nanofibers have shown their role in improving the tensile, compressive, and toughness behavior of the mixed cement material. The improvements of 62%, 38%, and 69%, respectively, were observed compared to those of the control paste. The nove

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Valencia-Saavedra, William, Ana María Aguirre-Guerrero, and Ruby Mejía de Gutiérrez. "Assessment of the Corrosion of Steel Embedded in an Alkali-Activated Hybrid Concrete Exposed to Chlorides." Molecules 27, no. 16 (2022): 5296. http://dx.doi.org/10.3390/molecules27165296.

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Hybrid alkali-activated cements (HAACs), also known as cements with high percentages of alkali-activated supplementary materials, are alternative cements that combine the advantages of ordinary Portland cement (OPC) and alkali-activated systems. These cements are composed of a minimum of 70% precursor material and a maximum of 30% OPC mixed with an alkaline activator. This article evaluates the corrosion performance of reinforced HAAC concrete based on fly ash (FA) under exposure to chlorides (FA/OPC, 80/20). Its performance is compared with that of a binary alkali-activated cement (AAC) based

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Nguyen, V. D., O. Río, and V. Sánchez-Gálvez. "Performance of hybrid cement composite elements under drop-weight impact load." Materiales de Construcción 64, no. 314 (2014): e017. http://dx.doi.org/10.3989/mc.2014.06813.

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Soriano, Lourdes, Mauro M. Tashima, Lucía Reig, et al. "Reusing Ceramic Waste as a Precursor in Alkali-Activated Cements: A Review." Buildings 13, no. 12 (2023): 3022. http://dx.doi.org/10.3390/buildings13123022.

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Concrete and ceramic products are among the most widely used materials in the construction sector. The production of ceramic materials has significantly grown in recent years. Concrete is one of the most widely used materials worldwide and most of its carbon dioxide (CO2) emissions are attributed to Portland cement (PC) production. This review analyzed previous research works into the use of ceramic waste (CW) as a precursor in alkali-activated (AA) cements. The physico-chemical properties of different CW materials were analyzed, and the properties and environmental impact of three main catego

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Iskandarova, M. I., F. B. Atabaev, Z. B. Yakubzhanova, G. B. Begjanova, N. A. Mironyuk, and D. U. Axmedova. "Improving properties of portland cement using new types of composite additives." E3S Web of Conferences 365 (2023): 02013. http://dx.doi.org/10.1051/e3sconf/202336502013.

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The possibility of improving the physical and mechanical properties of Portland cement with maximum clinker savings by optimizing the composition of hybrid additives is shown. It has been established that hybrid additives combining local mineral ingredients with the additive of artificial origin Phosfozol allow saving low-clinker Portland cement while maintaining its original grade 400.

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Yuan, Hai Yan, Shui Zhang, and Guo Zhong Li. "Orthogonal Experimental Study on Properties of Hybrid Fiber Reinforced Cement Mortar." Advanced Materials Research 168-170 (December 2010): 456–59. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.456.

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By adopting the method of orthogonal experimental design, the effect of three independent variables, that is steel fiber fraction, polypropylene fiber fraction and silica fume fraction on the compressive strength, flexural strength and shrinkage of cement mortar was studied. The results indicate that steel fiber is one of the most important factors affecting compressive strength and shrinkage, and polypropylene fiber is one of the most important factors affecting flexural strength and shrinkage of cement mortar. By using deviation analysis to analyze the orthogonal experiment results, the opti

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Song, Jianjian, Mingbiao Xu, Weihong Liu, Xiaoliang Wang, and Yumeng Wu. "Synergistic Effect of Latex Powder and Rubber on the Properties of Oil Well Cement-Based Composites." Advances in Materials Science and Engineering 2018 (August 28, 2018): 1–9. http://dx.doi.org/10.1155/2018/4843816.

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The brittleness and the poor resistance to external load of oil well cement impede the development of oil and gas wells. To overcome these deficiencies, latex powder or rubber and their hybrid combinations were used to modify the oil well cement. The conventional properties, mechanical properties, and scanning electron microscopy (SEM) images of the modified cement were analyzed. In comparison with latex powder-incorporated cement and rubber-incorporated cement, a significant improvement of fluid loss, flexural strength, impact strength, and elasticity of the cement slurry was observed when us

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Šulc, Stanislav, Vít Šmilauer, Jakub Šejna, and František Wald. "FIRE PROTECTION OF STEEL ELEMENTS USING LIGHTWEIGHT HYBRID CEMENT MORTAR." Acta Polytechnica CTU Proceedings 30 (April 22, 2021): 104–8. http://dx.doi.org/10.14311/app.2021.30.0104.

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Material properties of steel structures are significantly reduced at high temperatures, so a fire protection has strong positive impact on the fire resistance of the structure. Fire resistance of steel elements can be increased using a layer of cement-based materials as a fire protection. Most of commonly used cement-based materials do not withstand high temperatures without noticeable reduction of mechanical properties. Hybrid cement showed some interesting properties in the way of resistance to high temperatures and adhesion to steel surfaces, thus its behavior during fire exposure should be

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Zhang, Yao, J. Woody Ju, Hehua Zhu, and Zhiguo Yan. "A novel multi-scale model for predicting the thermal damage of hybrid fiber-reinforced concrete." International Journal of Damage Mechanics 29, no. 1 (2019): 19–44. http://dx.doi.org/10.1177/1056789519831554.

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A multi-scale micromechanical model is proposed to predict the damage degree of hybrid fiber-reinforced concrete under or after high temperatures. The thermal degradation of hybrid fiber-reinforced concrete is generally composed of the damage of the cement paste caused by thermal decomposition and thermal incompatibility, the deterioration of aggregates and fibers, and the interfacial damage between aggregates and the matrix. In this multi-scale model, four levels of hybrid fiber-reinforced concrete structures are considered when the thermal damage degree is derived; namely, the equivalent cal

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Cardoso DDS, MSD, PhD, Luiz, Élito Araújo DDS, MSD, PhD, and Juan Ramírez DDS, MSD, PhD. "Push-Out Bond Strength of Quartz Fiber Posts Luted with Self-Adhesive and Conventional Resin Cements." Odovtos - International Journal of Dental Sciences 18, no. 2 (2016): 73. http://dx.doi.org/10.15517/ijds.v0i0.24995.

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The aim of this study was to evaluate the influence of the resin cement on push-out bond strength of quartz fiber posts to intraradicular dentin. Fifty-six single-rooted human teeth were selected. After removing the crown, roots were endodontically treated and the dowel spaces were prepared with # 2 post drills of DT Ligth® SL Post System (VDW®). The specimens were randomly divided into four groups (n = 14). Group 1: RelyX™ Unicem (3M ESPE), Group 2: Clearfil ™ SA Cement (Kuraray), Group 3: Bifix SE (Voco), and G4 RelyX™ ARC (3M ESPE). After 24 h, 12 specimens of each group were sectioned in 6

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Cardoso DDS, MSD, PhD, Luiz, Élito Araújo DDS, MSD, PhD, and Juan Ramírez DDS, MSD, PhD. "Push-Out Bond Strength of Quartz Fiber Posts Luted with Self-Adhesive and Conventional Resin Cements." Odovtos - International Journal of Dental Sciences 18, no. 2 (2016): 73. http://dx.doi.org/10.15517/ijds.v18i2.24995.

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The aim of this study was to evaluate the influence of the resin cement on push-out bond strength of quartz fiber posts to intraradicular dentin. Fifty-six single-rooted human teeth were selected. After removing the crown, roots were endodontically treated and the dowel spaces were prepared with # 2 post drills of DT Ligth® SL Post System (VDW®). The specimens were randomly divided into four groups (n = 14). Group 1: RelyX™ Unicem (3M ESPE), Group 2: Clearfil ™ SA Cement (Kuraray), Group 3: Bifix SE (Voco), and G4 RelyX™ ARC (3M ESPE). After 24 h, 12 specimens of each group were sectioned in 6

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Huang, Jiandong, Mengmeng Zhou, Hongwei Yuan, Mohanad Muayad Sabri Sabri, and Xiang Li. "Prediction of the Compressive Strength for Cement-Based Materials with Metakaolin Based on the Hybrid Machine Learning Method." Materials 15, no. 10 (2022): 3500. http://dx.doi.org/10.3390/ma15103500.

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Cement-based materials are widely used in construction engineering because of their excellent properties. With the continuous improvement of the functional requirements of building infrastructure, the performance requirements of cement-based materials are becoming higher and higher. As an important property of cement-based materials, compressive strength is of great significance to its research. In this study, a Random Forests (RF) and Firefly Algorithm (FA) hybrid machine learning model was proposed to predict the compressive strength of metakaolin cement-based materials. The database contain

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Udod, O. A., and O. O. Yefimova. "LOSS OF LIGHT INTENSITY OF DENTAL PHOTOPOLYMERIZERS IN GLASS IONOMER CEMENTS." Ukrainian Dental Almanac, no. 1 (March 28, 2025): 22–26. https://doi.org/10.31718/2409-0255.1.2025.04.

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Relevance. For hybrid dualand tri-cure glass ionomer cements, it is necessary to determine certain irradiation conditions. Objective. To determine the loss of light intensity of photopolymerizers with different characteristics in glass ionomer cements. Materials and Methods. The loss of light intensity from a halogen photopolymerizer and two LED photopolymerizers was studied in 60 samples of dual-cure hybrid glass ionomer cement in shades A1 and A4 (Groups 1 and 2) and 60 samples of tri-cure glass ionomer cement in the same shades (Groups 3 and 4). Ten samples of 4 mm thickness from each group

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Bonfil, David, Lucien Veleva, and Jose Ivan Escalante-Garcia. "Effect of a Hybrid Pumice–Portland Cement Extract on Corrosion Activity of Stainless Steel SS304 and Carbon Mild Steel A36." Materials 17, no. 10 (2024): 2255. http://dx.doi.org/10.3390/ma17102255.

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The change in the corrosion activities of SS304 and the carbon steel A36 were studied during their exposure for 30 days to hybrid pumice-Portland cement extract (CE), to simulate the concrete–pore environment. The ionic composition and the initial pH (12.99) of the CE were influenced by the reduction of Portland cement (PC) content, volcanic pumice oxides and alkaline activators. Because of the air CO2 dissolution, the pH decreased and maintained a constant value ≈ 9.10 (established dynamic ionic equilibrium). The CE promoted the passivation of both steels and their free corrosion potential (O

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Kryvenko, Pavlo, Sergii Guzii, Oleksandr Kovalchuk, and Volodymyr Kyrychok. "Sulfate Resistance of Alkali Activated Cements." Materials Science Forum 865 (August 2016): 95–106. http://dx.doi.org/10.4028/www.scientific.net/msf.865.95.

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One of the most important questions of concrete durability is increasing of corrosion resistance of cement stone and materials on his basis. Perspective way of solving such problems is using of alkali activated binders.Two cement systems were investigated to obtain different materials for different application - geocement system for repair materials and protective coatings and fly ash alkali activated hybrid cement for corrosion resistant common cements and concretes.It was studied sulfate resistance of fly ash alkali activated cements after 3 years of storing in aggressive environments like 5

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