scholarly journals IBER CONCRETE FOR 3D-PRINTING

2019 ◽  
Vol 4 (3) ◽  
pp. 22-27 ◽  
Author(s):  
Елена Шорстова ◽  
Elena Shorstova ◽  
Сергей Клюев ◽  
Sergey Klyuev ◽  
Александр Клюев ◽  
...  
Keyword(s):  
3D Printing ◽  
Specific Surface ◽  
Construction Industry ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Concrete Mixture ◽  
Fine Aggregate ◽  
Reinforcing Agent ◽  
The World

The article deals with the possibility of using 3D-printing in the construction industry. The analysis of the work performed in this area in the world. It also presents the main advantages of this method of construction of structures and buildings in general. Experimental studies were carried out using the components of the mixture: CEM I 42.5H Sebryakovcement, fine ground quartzitic sandstone with a specific surface of 700 m2/ kg using gypsum. Sand was used as fine aggregate. To make the mixture plasticity, such additives as plasticizer PFM-NLK and Murapor Kombi 756 were used. Basalt fiber was used as a reinforcing agent. Were developed compositions of the concrete mixture dispersed reinforced with basalt fiber. The work was able to develop the composition of fiber-reinforced concrete mixture, which can be used for 3D- printing. Its strength characteristics were determined, allowing to conclude that this composition meets all the requirements for this technology.

scholarly journals Numerical and experimental studies of bent elements of basalt fiber reinforced concrete with prestressed glass composite reinforcement under static and short-term dynamic loads

2019 ◽  
Vol 221 ◽  
pp. 01026
Author(s):  
Vasilii Plevkov ◽  
Konstantin Kudyakov
Keyword(s):  
Reinforced Concrete ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Dynamic Effects ◽  
Glass Composite ◽  
Short Term ◽  
Concrete Elements ◽  
Composite Reinforcement

The article shows studies of bending basalt fiber reinforced concrete elements with pre-stressed glass composite reinforcement under static and short-term dynamic effects. Main results of numerical and experimental studies are presented. It is experimentally established and theoretically confirmed that a significant increase in the strength and crack resistance of the normal sections of concrete bent elements is observed when using basalt fiber reinforcement and pre-stressed glass composite reinforcement.

scholarly journals ANALISIS KUAT TARIK BELAH TERHADAP PEMANFAATAN LIMBAH STRAPPING BAND SEBAGAI SUBSTITUSI PASIR PADA BETON NORMAL

2020 ◽  
Vol 13 (2) ◽  
pp. 137
Author(s):  
Dr. Akhmad Suryadi, BS., MT
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fiber Reinforced Concrete ◽  
Concrete Mixture ◽  
Synthetic Fiber ◽  
Average Weight ◽  
Fine Aggregate ◽  
Split Tensile Strength ◽  
Tensile Strength Test ◽  
Concrete Concept

The advancement era, the use of strapping band in the process of shipping goods was increases because of the more practical needs and stronger straps make the waste from strapping band was increases. With a large amount of waste by shredding it into smaller sizes it can be used as a substitute for fine aggregate in concrete mixture with synthetic fiber reinforced concrete concept at the Laboratory of Civil Engineering Politeknik Negeri Malang. The objectives of this research were to analyze the characteristics of concrete with the substitution of strapping band waste against fine aggregate in compressive strength and split tensile strength test. The research method including: aggregate test and strapping band test, the mix design of concrete mixture was using the reference SNI 03-2834-2000. The experiments sample for each variation of 0%, 5%, and 8% were performed with 24 cylinder specimens for compressive strength and 6 cylinder specimens for split tensile strength. The compressive strength on 28 days with 0%, 5%, and 8% variation resulted in 27.67 kg/cm2; 26.82 kg/cm2; 17.83 kg/cm2. The split tensile strength on 28 days with 0% 5%, and 8% variation resulted in 2.42 kg/cm2; 1.90 kg/cm2; 1.51 kg/cm2. The average weight of cylinder specimens with 0%, 5%, and 8% variation resulted in 12.62 kg; 12.04 kg; 11.61 kg. Substitution of strapping band waste decreases compressive strength, split tensile strength and average weight concrete. Key words : Strapping band waste, compressive strength, split tensile strength

scholarly journals Development of hybrid steel-basalt fiber reinforced concrete – in aspects of flexure, fracture and microstructure

2021 ◽  
Vol 20 (1) ◽  
pp. 62-90
Author(s):  
J. Vinotha Jenifer ◽  
◽  
D. Brindha ◽  
Keyword(s):  
Reinforced Concrete ◽  
Coarse Aggregate ◽  
Volume Fraction ◽  
Basalt Fiber ◽  
Copper Slag ◽  
Fiber Reinforced Concrete ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Fiber Reinforced ◽  
Hybrid Fiber

The conventional concrete is considered to be critical in various constructional applications due to its setbacks such as service load failures, brittle property, low ductility and low tensile capacity. Apart from the natural bridging mechanism (aggregate bridging), an additional bridging mechanism is necessary to overcome the existing setbacks in plain cement concrete. Thus concrete with one or more types of fibers in suitable combinations can augment the mechanical performance of concrete causing a positive synergy effect. Along with the two control mixes with and without copper slag as partial replacement of fine aggregate, two different groups of hybrid combination of fibers such as steel and basalt were cast with 3 different groups of coarse aggregate proportions of sizes 20 mm and 12.5 mm. The hybridization of fibers is assessed in this study under compression, tension, flexure and fracture. Stress-strain data were recorded under compression to validate the strain capacity of the mixtures. The mechanical properties were analyzed for the positive hybrid effect and the influencing factors were copper slag, hybrid fiber combination and coarse aggregate proportions. The optimum volume fraction of fibers and mix proportions were highlighted based on various behaviors of concrete. Steel as macro fibers and basalt as microfibers were examined under microstructural studies (SEM and EDX). The results from the flexural toughness showcased the potential of hybrid fibers with greater energy absorption capacity ensuring the ductile property of the proposed hybrid fiber reinforced concrete.

scholarly journals Experimental Investigation on the Static and Impact Behaviors of Basalt Fiber-Reinforced Concrete

2017 ◽  
Vol 11 (1) ◽  
pp. 14-21 ◽  
Author(s):  
Hai Cao
Keyword(s):  
Reinforced Concrete ◽  
Impact Test ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Compressive Properties ◽  
Test Behavior ◽  
Chopped Basalt Fiber

Experimental studies on basalt fiber have been performed in China and abroad. Specifically, the compressive properties, flexural properties, splitting tensile properties and impact test behavior of chopped basalt fiber-reinforced concrete have been investigated. In addition, the effects of the mixing amount of fibers on the mechanical properties of C30 concrete were scrutinized, and the best mixing amount of fibers was obtained. The results indicate that the static and impact test behaviors of basalt fiber reinforced concrete significantly improved, and strengthening and toughening effects were achieved.

scholarly journals Increasing structuration rate of 3D printable concretes: the effect of viscosity enhancing admixtures

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
Jessica Amanda Hasse ◽  
Ariane Prevedello Rubin ◽  
Lucas Carvalho Quintanilha ◽  
Wellington Longuini Repette
Keyword(s):  
3D Printing ◽  
Construction Industry ◽  
Deposition Time ◽  
Bentonite Clay ◽  
Rheological Parameters ◽  
Strength Increase ◽  
New Paradigm ◽  
The World ◽  
Properties Of Materials ◽  
Reference Mixture

Abstract In the last decades, 3D printing has emerged as a promising new paradigm for manufacturing. Even in the civil construction industry, it has gained attention from companies and researchers around the world. Despite of that, the properties of materials applied in the additive manufacturing process are still understudied. One of the challenges is the need to conciliate both high bearing capacity, sparing the need of any confining measures, and the ability of keeping fluidity for enough time, in order to avoid cold joints between the layers. In that scenario, viscosity enhancing admixtures (VEAs) can be a solution, because they are able of promoting flocculation, viscosity gain and yield strength increase, reducing the deposition time in between the layers, which may decrease the formation of cold joints. This research evaluated rheological parameters of four different VEAs and found out that they show potential for increasing the cohesion and buildability of concretes for 3D-printing. The results showed that this effect varies with the type and amount of the admixture adopted and bentonite clay, as a mineral powder material, performed best in comparison to other polymeric VEAs, presenting structuration rates of up to 62% higher than the reference mixture.

Experimental Studies of Fiber-Reinforced Concrete Prisms Exposed to High Temperatures

2020 ◽  
Vol 864 ◽  
pp. 3-8
Author(s):  
Svitlana Berestianskaya ◽  
Evgeniy Galagurya ◽  
Olena Opanasenko ◽  
Anastasiia Berestianskaya ◽  
Ihor Bychenok
Keyword(s):  
Reinforced Concrete ◽  
High Temperatures ◽  
Experimental Studies ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Building Structures ◽  
Fibrous Materials ◽  
Fiber Reinforced ◽  
Safety Requirements ◽  
Reinforcement Fiber

Fiber-reinforced concretes are varieties of composite materials. Such materials are commonly used nowadays. Concrete is fiber-reinforced using various fibrous materials, or fibers, which are evenly distributed over the volume of the concrete matrix and simultaneously provide its 3D reinforcement. Fiber-reinforced concrete has better stress-related strength characteristics than ordinary concrete. Since building structures must meet both the strength, rigidity and stability requirements, and the fire safety requirements, then for the extensive use of fiber-reinforced concrete structures, not only the external load design, but also temperature effect design should be conducted in the design phase. The strength and strain characteristics of fiber concrete exposed to high temperatures must be known for this purpose. In view of this, three series of prisms were manufactured and tested: the first series contained no fiber at all (control prisms), the second series contained basalt fiber, and the third series contained steel fiber. The test results showed that adding fibers improves the mechanical characteristics of fiber-reinforced concrete samples under specified conditions.

Innovative Digital Technologies

2021 ◽  
pp. 142-163
Author(s):  
Don Amila Sajeevan Samarasinghe ◽  
Emma Wood
Keyword(s):  
Virtual Reality ◽  
New Zealand ◽  
3D Printing ◽  
Construction Industry ◽  
Building Information Modeling ◽  
Digital Technologies ◽  
Information Modeling ◽  
The World ◽  
Building Information ◽  
New Ideas

The construction industry is one of the oldest industries in the world and one that continues to change with client demand. In recent decades, innovation in the construction industry has greatly improved, increasing productivity. Innovation in construction refers to the generation and implementation of new ideas to enhance the performance of construction processes and to gain economic, environmental, and social benefits. Modern innovative digital technologies in construction include application of virtual reality (VR)/augmented reality (AR), blockchain, 3D printing, building information modeling (BIM), and off-site manufacturing. This chapter will explore the application of these innovative digital technologies in construction. It will particularly include recent case studies and examples from the New Zealand construction industry.

Perspective Biomass Carrier for Anaerobic Processing Systems of Organic Waste AIC

2020 ◽  
Vol 67 (1) ◽  
pp. 148-155
Author(s):  
Anatoliy V. Fedotov ◽  
Viktor S. Grigoriev ◽  
Dmitriy A. Kovalev ◽  
Andrey A. Kovalev
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Specific Surface ◽  
Organic Waste ◽  
Porous Ceramic ◽  
Experimental Studies ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Developed Surface ◽  
Highly Porous

To speed up the wastewater treatment under aerobic conditions and to optimize the processes of anaerobic wastewater treatment in digesters, immobilization technologies of microorganisms and enzymes on solid carriers are used. Ceramic carriers based on aluminosilicates and alumina are one of the promising inorganic biomass carriers. (Research purpose) To study the structure of porous ceramic biomass carriers for anaerobic processing of organic waste and evaluate the prospects for their use. (Materials and methods) The substrate for anaerobic digestion was a mixture of sediments of the primary and secondary sewage sumps of the Lyubertsy treatment facilities. K-65 cattle feed was used to ensure the constancy of the composition of organic substances in substrates as a cosubstrate. The authors used the method of low-temperature nitrogen adsorption of Bruner-Emmett-Teller to study the pore structure and specific surface of solid carriers on a specific surface analyzer Quntachrome Autosorb-1. (Results and discussion) The main characteristics (specific surface, volume of micro- and mesopores, predominant pore radius, water absorption and others) of chamotte foam lightweight and highly porous corundum ceramics were determined. It was revealed that ceramic materials with a developed surface and electrically conductive material provided an increase in biogas yield by 3.8-3.9 percent with an increase in methane content by an average of 5 percent. (Conclusions) The results of anaerobic digestion showed a positive effect of both a conductive carrier and highly porous ceramic materials on the process of anaerobic bioconversion of organic waste into biogas. It is advisable to expand experimental studies on the use of a conductive carrier with a developed surface based on highly porous ceramics.

3D Technology – Additive Manufacturing Applications and Prospects (Vol. 24, No. 9, Full Issue)

2020 ◽  
Vol 24 (09) ◽  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Environmental Impact ◽  
Real World ◽  
Vaccine Development ◽  
Health Screening ◽  
Wide Range ◽  
The World ◽  
Real World Applications ◽  
Manufacturing Applications

For the month of September 2020, APBN dives into the world of 3D printing and its wide range of real-world applications. Keeping our focus on the topic of the year, the COVID-19 pandemic, we explore the environmental impact of the global outbreak as well as gain insight to the top 5 vaccine platforms used in vaccine development. Discover more about technological advancements and how it is assisting innovation in geriatric health screening.

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