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Artykuły w czasopismach na temat „Cement composites”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Komagata, Yuya, Yuki Nagamatsu, and Hiroshi Ikeda. "Comparative Bonding Analysis of Computer-Aided Design/Computer-Aided Manufacturing Dental Resin Composites with Various Resin Cements." Journal of Composites Science 7, no. 10 (2023): 418. http://dx.doi.org/10.3390/jcs7100418.

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The use of dental resin composites adapted to computer-aided design/computer-aided manufacturing (CAD/CAM) processes for indirect tooth restoration has increased. A key factor for a successful tooth restoration is the bond between the CAD/CAM composite crown and abutment tooth, achieved using resin-based cement. However, the optimal pairing of the resin cement and CAD/CAM composites remains unclear. This study aimed to identify the optimal combination of a CAD/CAM composite and resin cement for bonding. A commercial methyl methacrylate (MMA)-based resin cement (Super-Bond (SB)) and four other

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Čáchová, Monika, Eva Vejmelková, Kateřina Šestáková, et al. "Basic Physical and Mechanical Properties of Composites Based on Three Different Cements." Key Engineering Materials 677 (January 2016): 186–90. http://dx.doi.org/10.4028/www.scientific.net/kem.677.186.

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This article is focused on cement based composites. Two cements differing in mineralogical composition are utilised as main binder in composites mixtures. Results of measured physical parameters of studied materials are presented. For the sake of comparison, a reference material with Portland cement was also prepared. Basic physical properties (measured by water vacuum saturation method and by helium pycnometry), characterizations of pore system (determined by mercury porosimetry) and mechanical properties are the matter of this study. Composites show various open porosity; the results of open

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Kumar, A. Srujan, K. Naga Meenakshi, G. Venkata Narayana reddy, G. Raju, Ch Honey, and P. Anil Kumar reddy. "Development of New Composites Using Industrial by Products." International Journal of Innovative Research in Engineering and Management 10, no. 6 (2022): 126–29. http://dx.doi.org/10.55524/ijirem.2022.9.6.22.

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In this paper thesis describes an experimental investigation of magnesium based cement mortar which consists of fly ash, magnesium oxide (MgO), magnesium Phosphate (MgPO4) and Phosphate tailings. This magnesia based cements are emerged as a viable alternative to Portland cement, with both technical and sustainability advantages. This study aims to use the mixture of cement, fly ash and magnesia. The major drawback of delayed setting time can be eliminated with the use of magnesia based cement. Hence, in this study different admixtures such as magnesium oxide, magnesium phosphate, phosphate tai

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Liu, Hong Yan, Ping Zhao, Chen Feng, and Rohit Sharma. "Cement-Sand Based Piezoelectric Smart Composites." Applied Mechanics and Materials 392 (September 2013): 9–13. http://dx.doi.org/10.4028/www.scientific.net/amm.392.9.

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In this paper, preliminary investigation of a new cement-sand based piezoelectric composite was conducted for potential structural engineering applications. PZT ceramic powder has been incorporated into cement material to form composite smart materials in earlier studies and showed promising outcome. However, the previous studies were limited to using only PZT and cement. In this study, PZT powder mixed with cement and sand, which is more realistic in civil engineering applications. The compressive strength of the composites with different PZT volume ratios was investigated. The results showed

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5

Magalhães, Tiago, Rita Fidalgo-Pereira, Orlanda Torres, et al. "Microscopic Inspection of the Adhesive Interface of Composite Onlays after Cementation on Low Loading: An In Vitro Study." Journal of Functional Biomaterials 14, no. 3 (2023): 148. http://dx.doi.org/10.3390/jfb14030148.

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Purpose: This study aimed to assess the layer thickness and microstructure of traditional resin-matrix cements and flowable resin-matrix composites at dentin and enamel to composite onlay interfaces after cementation on low loading magnitude. Materials and Methods: Twenty teeth were prepared and conditioned with an adhesive system for restoration with resin-matrix composite onlays manufactured by CAD-CAM. On cementation, tooth-to-onlay assemblies were distributed into four groups, including two traditional resin-matrix cements (groups M and B), one flowable resin-matrix composite (group G), an

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6

Jiang, Bin, and Wenguang Wang. "Study on the Mechanical Properties of CNTs/SiO₂ Composite Modified Cement based Composites." Frontiers in Science and Engineering 5, no. 4 (2025): 32–39. https://doi.org/10.54691/t7srjx43.

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This paper studies the hybrid application of carbon nanotubes (CNTs) and nano-SiO₂ sol in cement-based composites. Using water-bath ultrasonic dispersion technology, CNTs/SiO₂ composite fillers were prepared to enhance cement composites. The results show that carbon nanotubes (CNTs) can be uniformly dispersed in cement-based composites with nano-SiO₂ sol as the dispersion medium. When the contents of SiO₂ sol and CNTs are 1.50wt.% and 0.15wt.% respectively, the mechanical properties of cement-based composites are improved most significantly.

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7

a, Nayeemuddin, and Ansari Faiyaz Ahmed. "EVALUATION OF CEMENT POLYMER COMPOSITES USING SPSS ANALYSIS." International Journal of Advanced Research 11, no. 11 (2023): 407–17. http://dx.doi.org/10.21474/ijar01/17842.

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Cement Polymer Mixtures are made of Cement, sand, or bulk polymers are made using polymers added to improve their compressive strength, fatigue resistance, impact, and durability. Hydraulic cement polymer composites, created with modern polymer technology, are well-known for enhancing the development of composite materials and new products. This technology aims to improve both polymer cement for new construction and its use in repairing old cement. The adhesive properties of polymer cement allow for correction and bonding of both polymer-based and conventional cement. Cement-based composite ma

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8

Sikora, Pawel, and Sang-Yeop Chung. "Cement-Based Composites: Advancements in Development and Characterization." Crystals 10, no. 9 (2020): 832. http://dx.doi.org/10.3390/cryst10090832.

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This Special Issue on “Cement-Based Composites: Advancements in Development and Characterization” presents the latest research and advances in the field of cement-based composites. This special issue covers a variety of experimental studies related to fibre-reinforced, photocatalytic, lightweight, and sustainable cement-based composites. Moreover, simulation studies are present in this special issue to provide the fundamental knowledge on designing and optimizing the properties of cementitious composites. The presented publications in this special issue show the most recent technology in the c

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9

Ekincioglu, Ozgur, M. Hulusi Ozkul, Yoshihiko Ohama, Silvia Patachia, and Georgeta Moise. "Effect of Epoxy Resin Addition on the Moisture Sensitivity of Macro Defect Free Polymer-Cement Composites." Key Engineering Materials 466 (January 2011): 65–72. http://dx.doi.org/10.4028/www.scientific.net/kem.466.65.

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Macro-defect-free (MDF) cements are cement-polymer composites and were developed by Birchall et al. three decades ago. The composites are produced by mixing small amounts of polymer and water with cement. However, they have a different production method than that of cement pastes, which was inspired by rubber production. Mixtures of cement, polymer and water are processed by using a two-roll mill. The composites are known with their high flexural strengths. Unfortunately, there are not any known commercial products using MDF cements because of their poor durability under moisture. In this stud

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10

Khalyushev, A. K., and E. A. Kolesnichenko. "“Caking” Process in Green Cement Composites under the Impact of Environment." Modern Trends in Construction, Urban and Territorial Planning 3, no. 4 (2025): 74–81. https://doi.org/10.23947/2949-1835-2024-3-4-74-81.

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Introduction. The problems of resource and energy saving during production of cements and concretes on their basis are of great importance in the world. An important trend in solving these problems is the development of green cements, which contain various mineral additives of natural and anthropogenic origin. The advantages of the green cements compared to the clinker-based cements are revealed from both the environmental point of view — reduction of carbon dioxide emissions into the atmosphere, use of the industrial by-products, and the technical point of view — improvement of the technologi

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Rödel, Michaela, Jörg Teßmar, Jürgen Groll та Uwe Gbureck. "Tough and Elastic α-Tricalcium Phosphate Cement Composites with Degradable PEG-Based Cross-Linker". Materials 12, № 1 (2018): 53. http://dx.doi.org/10.3390/ma12010053.

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Dual setting cements composed of an in situ forming hydrogel and a reactive mineral phase combine high compressive strength of the cement with sufficient ductility and bending strength of the polymeric network. Previous studies were focused on the modification with non-degradable hydrogels based on 2-hydroxyethyl methacrylate (HEMA). Here, we describe the synthesis of suitable triblock degradable poly(ethylene glycol)-poly(lactide) (PEG-PLLA) cross-linker to improve the resorption capacity of such composites. A study with four different formulations was established. As reference, pure hydroxya

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12

Ni, Zhuo, Xue Xiao Du, Shuai Wang, Feng Xing, and Zhan Huang. "Effect of UF/Epoxy Microcapsules on Cement Composite." Advanced Materials Research 443-444 (January 2012): 700–704. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.700.

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Effect of microcapsules on cement composites has been studied. The hydration of cement composite using microcapsules is studied by XRD and thermal techniques, showing that the addition of microcapsules has little affect on the hydration of cement. The pore size distribution and surface area of the cement composite with microcapsule are analyzed, showing a reduction in the pore content of cement composite and makes the pores smaller, which would improve durability and impermeability for designed materials. Damaging on cement and composites containing microcapsules and self-healing of these dama

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13

Hancharoen, Kanokon, Parames Kamhangrittirong, and Pimsiree Suwanna. "Enhancement of Thermal and Sound Insulation Properties of Cement Composite Roofing Tile by Addition of Nanocellulose Coated Pineapple Fiber and Modified Rubber Tire Waste." Key Engineering Materials 861 (September 2020): 465–72. http://dx.doi.org/10.4028/www.scientific.net/kem.861.465.

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In this work, the enhancement of thermal and sound insulation properties of cement composite roofing tile with nanocellulose coated pineapple fiber and modified waste tire rubber is studied. The composite was composed of bacterial nanocellose (BNC) coated pineapple fibers, modified rubber particles, platicizer and type I Portland cement in the weight ratio of 10:50:0.8:100 with the water to cement ratio (w/c) of 0.5. The thermal conducitity of the fiber rubber cement composite could be reduced to 0.1080 ± 0.0048 W/m.K as opposed to 0.3810 ± 0.0041 and 0.5860 ± 0.0050 W/m.K for the fiber cement

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Rada, Roxana, Daniela Lucia Manea, Andrzej Nowakowski, and Simona Rada. "Nanocomposites Derived from Construction and Demolition Waste for Cement: X-ray Diffraction, Spectroscopic and Mechanical Investigations." Nanomaterials 14, no. 10 (2024): 890. http://dx.doi.org/10.3390/nano14100890.

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In the production of cement, raw materials can be partially substituted by regenerable waste provided from glasses, construction and demolition waste in order to reduce the environmental problem and burden of landfills. In this study, limestone–silicate composites were synthesized using starting materials such as glass waste and lime, brick, autoclaved aerated concrete (ACC), mortar or plaster waste. The structure and mechanical properties of the nano-composite materials have been studied. The mean CaCO3 crystallite sizes are higher for composites containing ACC and brick than for doping with

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15

Jašek, Marek, Jiri Brozovsky, Lucie Mynarzová, and Jan Hurta. "Development of Green Engineered Cementitious Composites." Advanced Materials Research 1020 (October 2014): 3–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1020.3.

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A development of fiber-cement composites is often focused on cost-effective and environmentally friendly materials (so-called green materials). Production of this material should produce less waste and it also should use less energy and less natural sources. There are numerous approaches to the development of green composites. One of the possible ways is a utilization of fly ashes instead of the cement part of composite. The paper discusses a development of green cementitious composite which incorporated fly ash materials produced in the Moravian-Silesian region as a partial replacement of the

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16

Sikora, Pawel, Didier Lootens, Maxime Liard, and Dietmar Stephan. "The effects of seawater and nanosilica on the performance of blended cements and composites." Applied Nanoscience 10, no. 12 (2020): 5009–26. http://dx.doi.org/10.1007/s13204-020-01328-8.

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AbstractThis study investigates the effects of seawater and nanosilica (3% by weight of cement), on the fresh and hardened properties of cement pastes and mortars produced with two types of low heat cements: Portland pozzolana cement (CEM II) and blast furnace cement (CEM III). The heat of hydration, initial and final setting times, rheological properties, strength development, sorptivity and water accessible porosity of the cement pastes and mortars were determined. The data reveal that cement type has a significant effect on the reaction rate of cement with seawater and nanosilica (NS). Spec

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Davidová, Vendula, and Pavel Reiterman. "AUTOGENOUS SHRINKAGE OF COMPOSITES BASED ON PORTLAND CEMENT." Acta Polytechnica CTU Proceedings 22 (July 25, 2019): 22–25. http://dx.doi.org/10.14311/app.2019.22.0022.

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Autogenous shrinkage of cement based composites is important property influencing number of their engineering application. Its ultimate value is predominantly determined by mineralogical composition of cement and its particle size distribution. Present paper introduces experimental study focused on the evaluation of various cements of grade CEM I 42.5 produced in Czech Republic in terms of shrinkage under autogenous conditions. Selected cement type is currently the most frequently used cement. Conducted study confirmed essential differences in ultimate values of shrinkage, which is partially d

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18

Xiong, Guo Xuan, Min Deng, Hai Qing Huang, and Ming Shu Tang. "Absorbing and Mechanical Properties of Cement-Based Composites with Nano-Titanic Oxide Absorbent." Advanced Materials Research 177 (December 2010): 558–61. http://dx.doi.org/10.4028/www.scientific.net/amr.177.558.

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The cement-based composite absorbing materials was made of portland cement and nano-titanic oxide absorbent. The relationship of electromagnetic wave reflectivity and nanometer TiO2 contents, dispersed means, samples thickness, and effect of nanometer titanium oxide on mechanical properties of cement-based composites were discussed in details. The experiment results revealed: 1) The reflectivity of cement-based composites with nanometer titanium oxide is less than -7 dB at 8~18 GHz frequency range; 2) The least reflectivity is -16.34 dB at 16.24 GHz and the bandwidth for -10 dB is 4.5 GHz; 3)

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Karthik, A., Rooban Chandru Maris K., Suligaikumar R., Vishnu K., and Vishwa S. "STUDY ON MECHANICAL AND THERMAL PROPERTIES OF WATER HYACINTH CEMENT COMPOSITES." International Journal of Advanced Research 12, no. 03 (2024): 532–47. http://dx.doi.org/10.21474/ijar01/18425.

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This study investigates the mechanical and thermal properties of a novel cement composite incorporating water hyacinth, an abundant and under-utilized aquatic plant. The water hyacinth fibers were treated and mixed with cement to create a composite material. Various ratios of water hyacinth to cement were tested to optimize the composites properties. The mechanical properties, including compressive strength, tensile strength and flexural strength were evaluated using standard testing methods. The thermal properties were assessed by measuring the thermal conductivity and specific heat capacity

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Khezhev, Tolya, Fatima Shogenova, Madina Bugova, Nikolay Kalambet, and Inal Tanashev. "Fiber-Hypsum-Cement-Vermiculite-Concrete Composites Using Volcanic Ash." Materials Science Forum 1043 (August 18, 2021): 67–71. http://dx.doi.org/10.4028/www.scientific.net/msf.1043.67.

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Fiber-gypsum-cement-vermiculite-concrete composites with use of gypsum, Portland cement, volcanic ash, expanded vermiculite and basalt fibers are considered. The results of studies of the compositions and physical and mechanical properties of fiber-gypsum-cement-vermiculite-concrete composites, the dependence of the composite characteristics on the reinforcement with basalt fibers are presented. Graphical interpretations of regression equations for compressive and flexural strength of composites are presented.

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Stevulova, Nadezda, Viola Hospodarova, Vojtech Vaclavik, Tomas Dvorsky, and Tomas Danek. "Characterization of cement composites based on recycled cellulosic waste paper fibres." Open Engineering 8, no. 1 (2018): 363–67. http://dx.doi.org/10.1515/eng-2018-0046.

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AbstractNowadays, there is paying an attention to the utilization of natural, renewable and biodegradable resources of raw materials of lignocellulosic character, residues from agricultural crops and wood processing as well as waste from papermaking industry in building composite materials preparing. Also recycled fibres coming from waste paper are considered as valuable material. The objective of this study is to utilize these recycled cellulosic fibres into cement composites and characterise their impact on resulting physical and mechanical properties of fresh and hardened cement composites.

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Xu, Dong Yu, Shi Feng Huang, Chao Ju, Zong Zhen Zhang, Xin Cheng, and Min Hua Jiang. "Periodicity of Piezoelectric Ceramic Rods on Properties of 1-3 Type Cement Based Piezoelectric Composite." Advanced Materials Research 123-125 (August 2010): 161–64. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.161.

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Periodic and non-periodic 1-3 type cement based piezoelectric composites were fabricated by cut and filling technique, using P(MN)ZT ceramic as functional material and cement as matrix. The influences of periodicity of piezoelectric ceramic rods in the composites on electrical properties of all the composites were discussed. The results show that the non-periodic composites have larger dielectric factor and piezoelectric strain constant than those of the periodic composite. The impedance-frequency spectra analysis indicates that the non-periodic arrangement of ceramic rods can effectively rest

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Arivusudar, N., and S. Suresh Babu. "Performance of ground granulated blast-furnace slag based engineered cementitious composites." Cement Wapno Beton 25, no. 2 (2020): 95–103. http://dx.doi.org/10.32047/cwb.2020.25.2.2.

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Engineered Cementitious Composites are belonging to the ultra-high performance fiber reinforced composites. Engineered Cemen-titious Composites are composed of fine grained ingredients like cement, fine sand, fly ash, but don’t coarse aggregate. Presence of cement in the typical Engineered Cementitious Composites mix is nearly 1000 kilograms per cubic meter, which make this material to keep far from the sustainability. The content of fly ash in the mix improves the performance of mechanical properties and durability, however, the percentage of replacement of cement has the optimum up to 30 to

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Bodnárová, Lenka, Katarína Kostelanská, and Filip Jankech. "The Possibilities of Application of Cellulose Fibers in Cement Composites, Monitoring the Properties." Advanced Materials Research 1054 (October 2014): 85–89. http://dx.doi.org/10.4028/www.scientific.net/amr.1054.85.

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Application of cellulose fibers in cement composites is one of the possibilities for achieving better utility properties of these composites. This article presents findings of experimental works concerned on increasing the resistance of cement composites to high temperatures. Properties of cement composites with the addition of cellulose fibers Greencel were observed. Rheological properties of fresh composite, mechanical properties and changes of properties after heat load were evaluated. The best mechanical properties showed the samples with technical cellulose, namely with the fiber G-55T an

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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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Kidalova, Lucia, Nadezda Stevulova, and Anton Geffert. "Possibility of Using Wood Pulp in the Preparation of Cement Composites." Selected Scientific Papers - Journal of Civil Engineering 9, no. 1 (2014): 51–58. http://dx.doi.org/10.2478/sspjce-2014-0006.

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Abstract Sustainable building materials are based on the use of renewable materials instead of non-renewable. Large group of renewable materials composes of plant fibres having high tensile strength are used as fillers into building material with reinforcement function of composite. This study aimed to establish the mechanical and physical properties of cement composites with organic fillers, such as wood pulp. Wood pulp cellulose is very interesting material as reinforcement in cement which contributes to a reduction of pollutants. Varying the producing technology (wood pulp and cement ratio

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Kosson, M., L. Brown, and F. Sanchez. "Early-Age Performance of 3D Printed Carbon Nanofiber and Carbon Microfiber Cement Composites." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 2 (2020): 10–20. http://dx.doi.org/10.1177/0361198120902704.

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3D printed cement composites with and without carbon nanofiber (CNF) and microfiber (CF) reinforcement within the cement ink were evaluated at seven days and compared with their traditionally cast counterparts. A liquid lubrication layer at the extrusion nozzle was noted. The reinforcement type influenced the formation of the extruded filament, with underextrusion seen during 3D printing with the CNF cement ink while sudden discontinuation of extrusion was experienced during 3D printing with the CF cement ink. No noticeable interfacial region between printed filaments was observed in the 3D pr

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Chaipanich, Arnon, and Nittaya Jaitanong. "Fabrication and Properties of PZT-Cement-Encapsulated Carbon Composites." Key Engineering Materials 421-422 (December 2009): 428–31. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.428.

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Lead zirconate titanate, Pb(Zr0.52Ti0.48)O3 (PZT) has excellent piezoelectric properties and has been used in a number of applications such as sensors and actuators. Recently, PZT has been used with a cement based material to produce new types of composite. These new piezoelectric-cement based composites have been developed for sensor applications in civil engineering works where these composites would provide better matching to concrete than the existing normal piezoelectric ceramic or piezoelectric-polymer composites. In this work, encapsulated carbon addition of 2% by volume was added to th

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Zhou, Shi Biao, An Guo Xiao, Yong Chen, et al. "The Preparation and Performance of Gypsum-Based Composites." Applied Mechanics and Materials 310 (February 2013): 46–50. http://dx.doi.org/10.4028/www.scientific.net/amm.310.46.

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Gypsum-based composites was produced using gypsum power(cement), PVA, white latex and sawdust via pouring process. The influences of water/ cement ratio, PVA/ cement ratio and glue/ cement ratio on release time, density and impact strength of the gypsum-based composites were investigated through orthogonal experiment. The results showed that PVA strengthened obviously impact strength, and also delayed the s release time of the Gypsum-based composites. Sawdust as light filler reduced the composites density. Low content of white latex is beneficial to increase the impact strength, while high con

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Golewski, Grzegorz Ludwik. "Concrete Composites Based on Quaternary Blended Cements with a Reduced Width of Initial Microcracks." Applied Sciences 13, no. 12 (2023): 7338. http://dx.doi.org/10.3390/app13127338.

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This article is devoted to the study of the combined effect of siliceous fly ash (FA), silica fume (SF), and nanosilica (nS) on the cement matrix morphology and size of microcracks occurring in the Interfacial Transition Zone (ITZ) between the coarse aggregate and the cement paste of concrete composites based on ordinary Portland cement (OPC). The manuscript contains analyses of width of microcracks (Wc) occurring in the ITZ area of concretes based on quaternary blended cements and changes in ITZ morphology in the concretes in question. Experiments were planned for four types of concrete. Thre

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Saputra, Albert Artha, Vladimir Sladek, Jan Sladek, and Chongmin Song. "Micromechanics determination of effective material coefficients of cement-based piezoelectric ceramic composites." Journal of Intelligent Material Systems and Structures 29, no. 5 (2017): 845–62. http://dx.doi.org/10.1177/1045389x17721047.

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Determination of effective composite properties for a real distribution of piezoelectric particles in cement matrix is considered using a representative volume element. The scaled boundary finite element method is proposed to analyse cement-based piezoelectric ceramic composites. Quadtree hierarchical meshing structure is utilized to provide a mesh that captures the material variation in the representative volume element effectively based on the colour of the piezoelectric composite’s image. Analyses with carefully selected boundary conditions are performed to obtain the effective material pro

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Niyazbekova, Rimma, Lazzat Shansharova, Marat Konkanov, and Sayakhat Nukeshev. "INVESTIGATION OF THE PROPERTIES OF COMPOSITE MATERIALS BASED ON CEMENTS CONTAINING MICRO-AND NANOPARTICLES FROM RED MUD." International Journal of Civil Engineering and Technology 9, no. 8 (2018): 715–24. https://doi.org/10.5281/zenodo.7535189.

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In the construction industry, the problems of material consumption, high production costs and poor quality are particularly acute. With increasing requirements to the quality of construction there is a need in the construction materials produced with relatively low cost in quality and durability that exceeds existing analogues. The main prerequisites for the synthesis of strength and durability of high-quality concretes and other cement composites is the more complete use of the latent energy of cement. In recent years, this is usually achieved through the use of active mineral additives intro

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Rattanachan, Sirirat, Piyanan Boonphayak, and Charussri Lorprayoon. "Original article. Development of chitosan/nanosized apatite composites for bone cements." Asian Biomedicine 5, no. 4 (2011): 499–506. http://dx.doi.org/10.5372/1905-7415.0504.065.

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Abstract Background: Calcium phosphate cements (CPC) is a promising materials for bone defect repair. Nanosized apatite or calcium orthophosphate has a better bioactivity than coarser crystals. Chitosan is produced commercially from chitin that is the structural element in the exoskeleton of crustaceans such as crabs and shrimp. The mixing of nanosized apatite and chitosan may provide the consistency cement, improving mechanical properties of the set bone cement. Objective: Develop nanosized apatite powder with chitosan for bone composite cement. Materials and method: Nanosized apatite was syn

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Feng, Chao, Jiaxing Huang, Peihui Yan, Fei Wan, Yunfei Zhu, and Hao Cheng. "Preparation and Properties of Waterborne Polypyrrole/Cement Composites." Materials 14, no. 18 (2021): 5166. http://dx.doi.org/10.3390/ma14185166.

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The electrical properties of cement are gaining importance for the application in building construction. Polypyrrole (PPy) has been widely applied in most fields because of its excellent conductivity performance, environmental friendliness, easy fabrication, and other specialties. These features made them useful for self-sensing applications. In this work, waterborne polypyrrole (WPPy) was prepared via the chemical oxidative polymerization with three kinds of hydrophilic agents: sodium lignosulfonate (LGS), sodium dodecyl sulfonate (SDS), and sodium dodecyl sulfate (SLS), and then WPPy/cement

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Namsone, Elvija, Genadijs Sahmenko, and Aleksandrs Korjakins. "Properties of Magnesium Oxychloride and Magnesium Oxysulphate Cement Composites." Key Engineering Materials 903 (November 10, 2021): 208–13. http://dx.doi.org/10.4028/www.scientific.net/kem.903.208.

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Increasing energy consumption is forcing the building sector to seek and use building materials and products that would be environmentally friendly. As one such material should be noted magnesium based cements, which production requires much lower calcination temperature than the traditional Portland cement. During the experimental research part of this work, two types of magnesia cement were produced (using magnesium chloride and magnesium sulphate brine solutions) and physical, mechanical properties of obtained cement composites were determined.

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Horszczaruk, Elżbieta. "Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review." Materials 12, no. 2 (2019): 326. http://dx.doi.org/10.3390/ma12020326.

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Despite the many available studies on the evaluation of the influence of nanomaterials on the properties of cement-based composites, the effects of some nanoparticles have not yet been fully recognized. Among the unrecognized nanomaterials are magnetite nanoparticles (MN). The literature devoted to this subject is limited. This paper reviews state-of-the-art research carried out on the effect of MN on the properties of cement-based composites. Detailed descriptions of the processing, microstructures (hydration products), properties (hydration, workability, mechanical and functional properties,

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Zegardło, Bartosz, Chrysanthos Maraveas, Kamil Świeczka, and Antoni Bombik. "Recycling Waste Agricultural Nets as Cement Composites." Materials 17, no. 8 (2024): 1828. http://dx.doi.org/10.3390/ma17081828.

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The advancement of agricultural mesh technology has contributed to its improved properties. As a result, agricultural nets are widely adopted in large-scale farming applications, for example, in cereal crop farming. However, a consequence of this increased use of agricultural nets is the accumulation of large amounts of waste. The current paper focuses on the recycling of agricultural nets used in wrapping straw bales to develop additives and fillers in cement composites. The research details an analysis of the use of waste agricultural meshes as an ingredient in cement composites. Six test se

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Madzura, M., M. N. Mazlee, and Shamsul Baharin Jamaludin. "Effects of Quarry Dust as Partial Sand Replacement on Compressive Strength and Crack Profile of Cement Composites." Materials Science Forum 819 (June 2015): 399–404. http://dx.doi.org/10.4028/www.scientific.net/msf.819.399.

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This research presents the findings of experimental works in terms of mechanical properties and crack profile of cement composites containing quarry dust at different percentages as a partial sand replacement. The compositions of quarry dust were varied from 10 to 20 wt. % and were mixed into five different ratios. It was found that 0.45 water cement ratio was suitable to mix all proportions and values of slump were observed have been increased with the increasing percentage of quarry dust in cement composites. The compressive strength tests were carried out and the results showed that the com

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Rodin, Alexander, Sergej Karpushin, and Vasiliy Smirnov. "Cement Composites’ Biostability." Materials Science Forum 1011 (September 2020): 171–78. http://dx.doi.org/10.4028/www.scientific.net/msf.1011.171.

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The studies to establish the species composition of micro-mycetes inhabiting the surface of cement composites after aging in sea water have been carried out. Cement stone made on the basis of Portland cement clinker, a mineral additive and a fungicidal preparation was considered as the studied material. To determine the materials’ fouling by microorganisms, their species composition, imprints and sampling methods were used. A change in the species composition of mycobiota isolated from the cement composites’ surface modified with sodium sulfate and sodium fluoride depending on the amount of ac

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Ohama, Yoshihiko. "Carbon-cement composites." Carbon 27, no. 5 (1989): 729–37. http://dx.doi.org/10.1016/0008-6223(89)90206-6.

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Rianyoi, Rattiyakorn, R. Potong, Nittaya Jaitanong, and Arnon Chaipanich. "Influence of Curing Age on Microstructure in Barium Titanate – Portland Cement Composites." Key Engineering Materials 484 (July 2011): 222–25. http://dx.doi.org/10.4028/www.scientific.net/kem.484.222.

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The objective of this study was to find out the influence of curing age on microstructure in barium titanate – Portland cement composites. Barium titanate, BaTiO3 (BT) particles was mixed with Portland Cement (PC) and BT content of 50% by volume to produce the composites. All composites were cured in chamber of 60oC and 98% relative humidity for 1, 2, 3, and 7 days. Thereafter, scanning electron microscope (SEM) was used to examine the interfacial zone between cement and BT ceramics. SEM observation indicated that the BT-PC composite cured for 7 days clearly showed calcium silicate hydrate gel

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Khezhev, Tolya A., Artur V. Zhurtov, and Gadzhimagomed H. Hadzhishalapov. "Heat-Resistant Cement Composites Using Volcanic Pumps and Vermiculite." Materials Science Forum 931 (September 2018): 489–95. http://dx.doi.org/10.4028/www.scientific.net/msf.931.489.

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The results of research on the development of heat-resistant cement composites using volcanic pumice and expanded vermiculite are presented. Compositions of heat-resistant cement composites are proposed that significantly reduce Portland cement consumption and simultaneously improve their heat-resistant properties. The use of basalt fibers in composites makes it possible to increase their strength, crack resistance and heat-resistant properties due to the perception of tensile temperature stresses. Part of the expensive vermiculite can be replaced by pumice without significantly increasing the

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Koňáková, Dana, Eva Vejmelková, Veronika Spedlova, Kirill Polozhiy, and Robert Černý. "Cement Composites for High Temperature Applications." Advanced Materials Research 982 (July 2014): 154–58. http://dx.doi.org/10.4028/www.scientific.net/amr.982.154.

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Fiber reinforced composites designed for better thermal resistance, which can be used in constructions with a higher fire hazard, are studied. The matrix of studied composite is based on aluminous cement, because of its proved higher thermal resistance than ordinary Portland cement. Basalt sand is used as alternative aggregate replacing silica sand, and basalt fibers are employed for an improvement of mechanical performance. The presented analysis of basic physical properties, mechanical, hygric and thermal properties shows that basalt is an appropriate material for cement based composites for

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Kajon, S., K. Hancharoen, P. Kamhangrittirong, and P. Suwanna. "Incorporation of Rubber Waste to Fiber Cement Composite: Comparative Study of Rubber Tire Waste and Rubber Band Waste." IOP Conference Series: Materials Science and Engineering 1280, no. 1 (2023): 012022. http://dx.doi.org/10.1088/1757-899x/1280/1/012022.

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Abstract This study compares the effects of rubber tire waste and rubber band waste on physical, mechanical, and thermal properties of cement composite for roofing application. The rubber particles, prepared from waste rubber tire (RT) and/or calcium carbonate filled rubber band (RB), were mixed with cement paste and tested for workability and flexural strength. It was found that RT yields higher workability than RB when mixed with the cement paste. The rubber-cement composites (CR) with the combination of RT and RB at the RT:RB volume fraction of 1.00:0.00 (CRT), 0.75:0.25 (CRT.75/B.25) and 0

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Khezhev, Tolya, Tamerlan Badziev, Talib Soblirov, and Timur Tamashev. "Gypsum-Cement Composites Based on Volcanic Ash." Materials Science Forum 1011 (September 2020): 136–43. http://dx.doi.org/10.4028/www.scientific.net/msf.1011.136.

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The studies’ results to determine the gypsum, ash and Portland cement components proportions, which would ensure a decrease in the specific binder consumption, as well as the ash grain composition’s effect on the properties of the gypsum cement pozzolan composite, are presented. It was revealed that the use of volcanic ash together with Portland cement in gypsum concrete composites allows reducing gypsum consumption by up to 50% without a significant decrease in strength characteristics. At the same time, the developed gypsum concrete composites have increased water resistance. The influence o

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Wang, Zhi, Lei Zhang, Li Ying Fan, and Guo Pu Shi. "Effect of Cement Clinker on the Properties of Flue Gas Desulphurization Gypsum-Steel Slag Cementitious Composites." Advanced Materials Research 250-253 (May 2011): 990–93. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.990.

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The effects of cement clinker on the properties of flue gas desulphurization gypsum-based steel slag composites were analyzed in this article and the influence rules of setting time, final setting time, flexural strength and compressive strength of cementitious composites were also discussed. The micro-morphology of the composite was observed by scanning electron microscope. At the same time, the excitation mechanism of cement clinker on gas desulphurization gypsum-based steel slag was put forward. It was demonstrated that cement clinker with content of 2% in the composites can better stimulat

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Choi, Yun-Wang, Sung-Rok Oh, and Byung-Keol Choi. "A Study on the Manufacturing Properties of Crack Self-Healing Capsules Using Cement Powder for Addition to Cement Composites." Advances in Materials Science and Engineering 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/5187543.

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We fabricated crack self-healing capsules using cement powder for mixing into cement composites and evaluated the properties of the capsule manufacturing process in this study. The manufacture of the self-healing capsules is divided into core production processing of granulating cement in powder form and a coating process for creating a wall on the surfaces of the granulated cement particles. The produced capsules contain unhardened cement and can be mixed directly with the cement composite materials because they are protected from moisture by the wall material. Therefore, the untreated cement

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Kidalova, Lucia, Nadežda Števulová, and Anton Geffert. "Study of Cement Composites Properties with Filler Based on Wood Pulp." Advanced Materials Research 897 (February 2014): 165–70. http://dx.doi.org/10.4028/www.scientific.net/amr.897.165.

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Sustainable building materials are based on the use of renewable materials instead of non-renewable. A large group of renewable raw materials are materials of plant origin containing cellulosic fibres which are used as filler into building material with reinforcement function of composite. This study aimed to establish the mechanical and physical properties of cement composites with organic filler, such as wood pulp. Pulp derived from wood pulping process is very interesting material as reinforcement in cement which contributes to a reduction of pollutants. In this paper, utilization of unblea

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Li, Bochen, Hongbo Liu, Jiashuo Jian, Hourui Duan, and Hongshuai Gao. "Experimental Study on Flexural Properties of Polyurethane–Cement Composites under Temperature Load." Applied Sciences 12, no. 24 (2022): 12799. http://dx.doi.org/10.3390/app122412799.

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Polyurethane cement composite is a new organic–inorganic composite material with high strength, corrosion resistance, and fast curing. It is a complement and alternative to traditional cement materials. The flexural properties of polyurethane cement composites are the basic mechanical index of the material. In order to study the flexural properties under different temperature loads, a molecular model was established, the chemical reaction process of polyurethane cement and the temperature response mechanism was analyzed, and the preparation process of polyurethane cement was proposed. Then, be

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Kazragis, Algimantas, Aušra Juknevičiūte, and Albinas Gailius. "UTILIZATION OF BOON AND CHAFF FOR MANUFACTURING LIGHTWEIGHT WALLING MATERIALS." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 12, no. 1 (2004): 12–21. http://dx.doi.org/10.3846/16486897.2004.9636810.

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Lightweight composites for walls and thermal insulation, containing anhydrite (An) or aluminate cement (Al), vinyl acetate (VA) or cellulose (Cl) polymeric binders and cellulose fiber fillers (boon, chaff) were produced. The best results were obtained for transportation and construction of items containing: An ≥ 30–45 %, Al ≥ 30–50 %, VA ≥ 1–5 %, Cl ≥ 0,5–5,0 %, boon or chaff ≥ 40–47 %. Polymeric binder VA for both kinds of cement is better than Cl. An is better for boon than for chaff. Aluminate cement is a good binder for both types of fiber fillers. Density r of a composite containing cemen

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