scholarly journals DEVELOPMENT OF A MATERIAL BASED ON LIME-CARBONATE AND CALCIUM COMPOSITIONS FOR ADDITIVE TECHNOLOGIES

2019 ◽  
Vol 4 (4) ◽  
pp. 8-16 ◽  
Author(s):  
Т. Бахтина ◽  
Tamara Bahtina ◽  
Н. Любомирский ◽  
Nikolay Lyubomirskiy ◽  
А. Бахтин ◽  
...  
Keyword(s):  
3D Printing ◽  
Inkjet Printing ◽  
Mass Fraction ◽  
Experimental Studies ◽  
Hydrated Lime ◽  
Physicomechanical Properties ◽  
Additive Technologies ◽  
High Concentration ◽  
Physicomechanical Characteristics ◽  
Materials Used

The results of experimental studies to determine the possibility of obtaining carbonized material based on lime-carbonate-calcium compositions using inkjet 3D printing are presented. Some types of materials used as connecting for inorganic binders have been studied. An effective method of hardening the model obtained in the process of 3D printing is determined. The physicomechanical characteristics of prototypes solidified in an environment of high concentration of carbon dioxide are defined. It has been established that artificial carbonization of samples obtained on various types of binders for 90 minutes contributes to the formation of a sufficiently strong structure from insoluble calcium carbonate, a product of carbonation of hydrated lime. In this case, the degree of carbonization depends on the type of binder and its mass fraction in solution. The most effective types of binders are selected and the optimal content of the binders in solution is determined. In result, to ensure the production of materials with sufficient physicomechanical properties, a possibility of obtaining carbonized material by the method of 3D inkjet printing at certain optimal contents of the tested binders is confirmed.

Investigation of the Various Binders’ Effect on the Lime Binder Carbonate Hardening Process for its Use in Additive Technologies

2020 ◽  
Vol 1011 ◽  
pp. 123-129
Author(s):  
Alexander Bakhtin ◽  
Nikolay Lyubomirskiy ◽  
Tamara Bakhtina ◽  
Vitaliy Nikolaenko
Keyword(s):  
Inkjet Printing ◽  
Mass Fraction ◽  
Mechanical Characteristics ◽  
Experimental Studies ◽  
Hydrated Lime ◽  
Additive Technologies ◽  
High Concentration ◽  
Hardening Process ◽  
Materials Used ◽  
Physical And Mechanical Characteristics

The obtaining carbonized material experimental studies’ results based on lime carbonate systems by 3D inkjet printing are presented. Some types of materials used as binders for inorganic binders have been studied. An effective method of hardening the model obtained in the 3D printing process is determined. The physical and mechanical characteristics of the prototypes hardened in the carbon dioxide medium or high concentration are determined. It was found that artificial carbonization of the samples obtained on various types of binders for 90 min contributes to the formation of a fairly strong structure of insoluble calcium carbonate, the hydrated lime carbonation product, and the carbonization degree depends on the type of binder and its mass fraction in the solution. The most effective types of binders were selected and the optimal content of the studied binders in the solution was determined.

scholarly journals Naturally Derived Photoinitiators for Dental and Biomaterials Applications

2020 ◽  
Vol 1 (02) ◽  
pp. 72-78
Author(s):  
Mohamed Mahmoud Abdul-Monem
Keyword(s):  
Tissue Engineering ◽  
3D Printing ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Water Soluble ◽  
Polymerization Reaction ◽  
3D Bioprinting ◽  
Engineering Applications ◽  
Bonding Agents ◽  
Materials Used

AbstractBiocompatibility of materials used in dental and biomaterials applications is very important and depends on the components of these materials. Photopolymerized materials for dental and biomaterials applications have been progressively used since the 1970s. One of the crucial components in these materials is the photoinitiator (PI) that initiates the polymerization reaction. Synthetic PIs are the most commonly used types, but owing to their drawbacks such as cytotoxicity, insolubility in water, and high cost, research on naturally derived (bio-sourced) PIs is growing, to find an alternative to these synthetic types, especially in the growing field of three-dimensional (3D) printing and bioprinting of biomaterials for tissue engineering applications. Naturally derived PIs are biocompatible, highly water-soluble, and abundant. Naturally derived PIs have been used to prepare experimental dentine bonding agents, dentine primers, photo-crosslinked hydrogels for tissue engineering applications, antibacterial coatings, guided tissue regeneration membranes, and 3D printed biomaterials. An electronic search was done using MEDLINE/PubMed and Scopus databases using the keywords naturally derived, bio-sourced, PIs, dental, biomaterials, 3D printing, and 3D bioprinting, to review potential naturally derived PIs for dental and biomaterials applications. There are a variety of naturally derived PIs with various colors and absorption spectra to choose from, according to the intended application. Most of naturally derived PIs can be used with modern conventional dental light curing units, making them applicable for experimental studies for potential dental and biomaterials applications. Due to their biocompatibility and availability it is expected that in the upcoming years, research on naturally derived PIs and their dental and biomaterials applications will increase especially in the growing field of 3D bioprinting in which cell viability is essential; thus this review was done.

scholarly journals Effect of Peat on Physicomechanical Properties of Cemented Brick

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Syed Mofachirul Islam ◽  
Roslan Hashim ◽  
A. B. M. Saiful Islam ◽  
Ryan Kurnia
Keyword(s):  
Building Materials ◽  
Low Cost ◽  
Experimental Studies ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Physicomechanical Properties ◽  
International Standards ◽  
Unit Weight ◽  
Materials Used

The popularity of low cost, lightweight, and environmentally affable masonry unit in building industry carries the need to investigate more flexible and adaptable brick component as well as to retain the requirements confirmed in building standards. In this study, potential use of local materials used as lightweight building materials in solving the economic problems of housing has been investigated. Experimental studies on peat added bricks have been carried out. It demonstrates the physicomechanical properties of bricks and investigates the influence of peat, sand, and cement solid bricks to the role of various types of constructional applications. The achieved compressive strength, spitting strength, flexural strength, unit weight, and ultrasonic pulse velocity are significantly reduced and the water absorption is increased with percentage wise replacement of peat as aggregate in the samples. The maximum 20% of (% mass) peat content meets the requirements of relevant well-known international standards. The experimental values illustrate that, the 44% volumetric replacement with peat did not exhibit any sudden brittle fracture even beyond the ultimate loads and a comparatively smooth surface is found. The application of peat as efficient brick substance shows a potential to be used for wall and a viable solution in the economic buildings design.

scholarly journals Features and regularity of zonal changes in the physicomechanical characteristics of Zakhidnyi Donbas rocks

2019 ◽  
Vol 109 ◽  
pp. 00068
Author(s):  
Tetiana Palamarchuk ◽  
Liliia Prokhorets ◽  
Mykola Bobro ◽  
Valerii Trypolskyi
Keyword(s):  
Experimental Studies ◽  
Physicomechanical Properties ◽  
Test Results ◽  
Strength Parameters ◽  
Coriolis Forces ◽  
Physicomechanical Characteristics ◽  
The Earth ◽  
Significant Difference ◽  
Rotation Of The Earth ◽  
Composition Structure

This article summarizes the results of numerous experimental studies of the physicomechanical properties of rocks from deposits of Zakhidnyi Donbas. The analysis of the obtained data allowed us to reveal the zonal nature of their change. Regularity has been established for increasing the strength parameters of rocks in the direction from west to east, the mechanism of which is explained, among other things, by the influence of Coriolis forces arising from the daily rotation of the Earth. It has been established that for more durable rocks, such as sandstone, the change in strength characteristics in the roof and floor is insignificant, whereas for weaker mudstones and siltstones, there is a significant difference in the above strength parameters. A generalization of the test results of Zakhidnyi Donbas rocks showed a large variation in their properties under the conditions of the achieved depth of the reservoir under development, which is due to the variability of the composition, structure, texture of the rocks and the degree of epigenetic transformations.

scholarly journals Studying the possibility of obtaining heat-insulating building materials based on lime carbonization hardening and rice husk

2020 ◽  
Vol 315 ◽  
pp. 07010
Author(s):  
Vitaliy Nikolaenko ◽  
Nikolai Lyubomirskiy ◽  
Elena Nikolaenko ◽  
Aleksandr Bakhtin
Keyword(s):  
Rice Husk ◽  
Building Materials ◽  
Heat Insulation ◽  
Hydrated Lime ◽  
Physicomechanical Properties ◽  
Raw Material ◽  
Plant Origin ◽  
High Concentration ◽  
Waste Products ◽  
Dry Pressing

The paper presents studies of changes in the physicomechanical properties of samples based on lime-limestone compositions with rice husk filler hardening in an environment with a high concentration of carbon dioxide. The samples are semi-dry pressing cylinders made of a mixture of hydrated lime, ground limestone and a filler in the form of rice husk in order to reduce the density and increase the heat-insulation ability of building materials based on this raw material mixture. The studies showed that there is an increase in the strength of the samples due to the transition of portlandite to calcite during forced carbonization. The possibility of using waste products of plant origin by the example of rice husk in the production technology of heat-insulating building materials using artificial forced carbonization which will allow obtain products with the following characteristics: compressive strength 2.2 – 4.0 MPA at a density of 700 - 1200 kg/m³, thermal conductivity – 0.11-0.13 W/m•K, has been proved.

scholarly journals INFORMATION MODELING AND ADDITIVE TECHNOLOGIES IN CONSTRUCTION

2021 ◽  
Vol 9 (3) ◽  
pp. 41-45
Author(s):  
Elena Ignatova ◽  
Valentina Predeina
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Additive Technologies ◽  
Information Modeling ◽  
Object Size ◽  
3D Printing Technology ◽  
The Subject ◽  
Verification Process ◽  
Materials Used ◽  
Parameter Values

The aspects of construction digitalization related to the use of information modeling of the construction object (BIM) and 3D printing are discussed. The object of the research is additive manufacturing and its features in development. The subject of the research is the influence of additive constructing on BIM. The purpose of the research is to develop a BIM methodology, using 3D printing. The limitations of additive constructing are analyzed, and the methodology of information modeling considering these limitations is formed as a result of the research. The main limitations of 3D printing are associated with the size of the construction object, size, shape and weight of structures, used materials, used reinforcement technology, costs, temperature and print speed. The methodology includes the formation of model with special parameters, showing their values, and the verification of parameter values for acceptability. Checking the values of the parameters can be a part of mandatory verification process of the information model. The proposed method does not depend on the level of development of a 3D printing technology.

Custom Designed Orthodontic Attachment Manufactured Using a Biocompatible 3D Printing Material

2017 ◽  
Vol 54 (4) ◽  
pp. 757-758
Author(s):  
Riham Nagib ◽  
Camelia Szuhanek ◽  
Bogdan Moldoveanu ◽  
Meda Lavinia Negrutiu ◽  
Cosmin Sinescu ◽  
...  
Keyword(s):  
3D Printing ◽  
Treatment Planning ◽  
Computer Tomography ◽  
Volumetric Data ◽  
Impacted Teeth ◽  
3D Printing Technology ◽  
Custom Design ◽  
Custom Made ◽  
Materials Used ◽  
Orthodontic Forces

Treatment of impacted teeth often implies placing a bonded attachment and using orthodontic forces to move the tooth into occlusion. The aim of the paper is to describe a novel methodology of manufacturing orthodontic attachments for impacted teeth using the latest CAD software and 3D printing technology. A biocompatible acrylic based resin was used to print a custom made attachment designed based on the volumetric data aquired through cone bean computer tomography. Custom design of the attachment simplified clinical insertion and treatment planning and 3D printing made its manufacturing easier. Being a first trial, more reasearch is needed to improve the methodology and materials used.

Experimental studies on resistance characteristics of high concentration red mud in pipeline transport

2008 ◽  
Vol 14 (1) ◽  
pp. 157-161
Author(s):  
Xing Wang ◽  
Yuan-yuan Qu ◽  
Wei-wei Hu ◽  
Jie Chen ◽  
Xue-yi Zhao ◽  
...  
Keyword(s):  
Red Mud ◽  
Experimental Studies ◽  
Pipeline Transport ◽  
High Concentration

Dissolution of Cellulose in [Amim]Cl/Lithium Salts Solvents System

2012 ◽  
Vol 535-537 ◽  
pp. 1100-1103 ◽  
Author(s):  
Wei Xiao Liao ◽  
Jun Song ◽  
Bo Wen Cheng ◽  
Jie Mei
Keyword(s):  
Ionic Liquid ◽  
Temperature Increase ◽  
Mass Fraction ◽  
Lithium Salts ◽  
Dissolution Behavior ◽  
Cellulose Solution ◽  
High Concentration

Lithium salts were dissolved in ionic liquid [Amim]Cl, and their dissolution behavior were tested by turbidimeter. It is found that the solubility of LiCl in [Amim]Cl is up to 14g/100g [Amim]Cl at 70°C, and it keeps growing as the temperature increase. Turbidity of cellulose solution in [Amim]Cl at 70°C was obtained, but the solubility of high concentration cellulose solution could not be demonstrated accurately in this way. Cellulose solutions with [Amim]Cl or [Amim]Cl/lithium salts as solvents at different temperature were obtained, in which the lithium salts were 1wt%(mass fraction of [Amim]Cl), polarization microscope was used to observe the dissolution behavior of cellulose. The solubility of cellulose would increased as temperature rose, and the solubility of cellulose in [Amim]Cl/1wt%LiCl reached 11.9%(mass fraction of [Amim]Cl) at 80°C, which was higher than in [Amim]Cl 9.4% at 80°C. It is found that the addition of lithium salts into [Amim]Cl can really improve the solubility of cellulose than in [Amim]Cl.

Effect of Wood Filler Concentration on Physical and Mechanical Properties of PLA-Based Composites

2021 ◽  
Vol 887 ◽  
pp. 110-115
Author(s):  
G.A. Sabirova ◽  
R.R. Safin ◽  
N.R. Galyavetdinov
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Composite Materials ◽  
Impact Strength ◽  
Wood Flour ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Filler Concentration ◽  
High Concentration

This paper presents the findings of experimental studies of the physical and mechanical properties of wood-filled composites based on polylactide (PLA) and vegetable filler in the form of wood flour (WF) thermally modified at 200-240 °C. It also reveals the dependence of the tensile strength, impact strength, bending elastic modulus, and density of composites on the amount of wood filler and the temperature of its thermal pre-modification. We established that an increase in the concentration of the introduced filler and the degree of its heat treatment results in a decrease of the tensile strength, impact strength and density of composite materials, while with a lower binder content, thermal modification at 200 °C has a positive effect on bending elastic modulus. We also found that 40 % content of a wood filler heated to 200 °C is sufficient to maintain relatively high physical and mechanical properties of composite materials. With a higher content of a wood filler, the cost can be reduced but the quality of products made of this material may significantly deteriorate. However, depending on the application and the life cycle of this product, it is possible to develop a formulation that includes a high concentration of filler.

Sign in / Sign up

Export Citation Format

Share Document