Optical Fiber Waste Used as Reinforcement for Concrete with Recycled Marble Aggregate

Sustainable development in the 21st century depends on the reuse of materials and products, as well as on economic and environmental incentives for recycling. Several studies have sought to improve the quality of concrete, as well as its durability and strength, by adding fibers (metallic, polypropylene, carbon, vegetables) or by replacing the aggregate. The use of optical fiber waste in concrete is still incipient and few studies address the use of marble aggregate to be used in concrete. This research assesses the behavior of the mixture composed of: Portland cement + fine aggregate (sand from crushed marble waste) + coarse aggregate (gneiss) + optical fiber waste and water. The compressive strength, the tensile strength and the modulus of elasticity of concrete and the durability of optical fiber waste in alkaline composite were tested through microstructural evaluation. The results present an increase of about 20% in the mechanical properties and a reduction in the rigidity of the mixture, making the material more ductile. The superficial protection of the fibers made them more resistant to the alkaline attack of the cement. The knowledge acquired would allow the creation of sustainable concrete reinforced with optical fiber in a much more efficient way.

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Pengaruh Cangkang Kerang Laut Terhadap Kuat Tekan Beton

Sultra Civil Engineering Journal ◽

10.54297/sciej.v2i1.167 ◽

2021 ◽

Vol 2 (1) ◽

pp. 46-54

Author(s):

Neti Rahmawati ◽

Irwan Lakawa ◽

Sulaiman Sulaiman

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Building Materials ◽

Coarse Aggregate ◽

Fine Aggregate ◽

Fine Aggregates ◽

Concrete Quality ◽

Compressive Strength Of Concrete ◽

Physical Construction

Concrete is one of the most widely used building materials today interms of physical construction. Concrete is made from a mixture offine, coarse aggregate, cement, and water with a certain ratio, aswell as materials that are usually added to the concrete mixtureduring or during mixing, to changing the properties of concrete tomake it more suitable in certain jobs and more economical, can alsobe added with certain other mixed materials as needed if deemednecessary. Seashells can be used to mix concrete. This study aims todetermine whether the addition of shells aggregate shells in aconcrete mixture can affect the mechanical properties of concrete.The specimens used are in the form of cubes with a size of 15cm x 15cm x 15 cm, consisting of additional concrete coarse and fineaggregate with shell substitution percentage of 0%, 15%, 20% with atotal sample of 45, with the planned concrete quality of K225. Theuse of sea shells in increasing the compressive strength of concrete isbetter used as fine aggregate than coarse aggregate. The use of seashells as a substitute for fine aggregates achieves maximum resultsat 20% composition.

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Effect of Mechanical Properties On Light Weight Sustainable Concrete With The Use of Waste Coconut Shell As Replacement For Coarse Aggregate

10.21203/rs.3.rs-625366/v1 ◽

2021 ◽

Author(s):

Karthiga Shenbagam Natarajan ◽

Dhivya Ramalingasekar ◽

Sushmitha Palanisamy ◽

Mohanraj Ashokan

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Construction Industry ◽

Coarse Aggregate ◽

Research Work ◽

Coconut Shell ◽

Natural Material ◽

Light Weight ◽

Sustainable Concrete ◽

Sisal Fibers

Abstract Concrete is one of the most important material that is used in the construction industry all around the world. A larger part of the capacity in concrete is generally employed by the coarse aggregate. Due to the tremendous use of coarse aggregate in the construction industry the material is getting degraded. In order to preserve the natural material, we are in search of an alternate material that can be used in concrete instead of the original one. So in this research work a try has been attempted to study the mechanical behaviour of light weight concrete when we use coarse aggregate as waste coconut shell inside concrete. To improve the strength of concrete we also use the sisal fibers in various proportions ranging between 1% to 5% in accordance to the binder weight. After the mechanical properties tests such as the compression test, spilt tensile strength, flexural test, modulus of elasticity test, impact resistant test were conducted finally it was concluded that there was increment in the compression strength up to 5%, tensile strength was increased to 17% elastic modulus to 7% when the fiber content used was 3%. Thus with the use of these waste materials it was found that the concrete's strength gets increased and it leads to the formation of sustainable concrete thus reducing the pollution in the environment.

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The Influence of Different Plasma Cell Discharges on the Performance Quality of Surgical Gown Samples

Materials ◽

10.3390/ma14154329 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4329

Author(s):

Atif H. Asghar ◽

Ahmed Rida Galaly

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Exposure Time ◽

Electrical Characteristics ◽

Cathode Fall ◽

Treatment Efficiency ◽

Performance Quality ◽

Surgical Gown ◽

The One

An experimental study was performed on a low-density plasma discharge using two different configurations of the plasma cell cathode, namely, the one mesh system electrodes (OMSE) and the one mesh and three system electrodes (OMTSE), to determine the electrical characteristics of the plasma such as current–voltage characteristics, breakdown voltage (VB), Paschen curves, current density (J), cathode fall thickness (dc), and electron density of the treated sample. The influence of the electrical characteristics of the plasma fluid in the cathode fall region for different cathode configuration cells (OMSE and OMTSE) on the performance quality of a surgical gown was studied to determine surface modification, treatment efficiency, exposure time, wettability property, and mechanical properties. Over a very short exposure time, the treatment efficiency for the surgical gown surface of plasma over the mesh cathode at a distance equivalent to the cathode fall distance dc values of the OMTSE and for OMSE reached a maximum. The wettability property decreased from 90 to 40% for OMTSE over a 180 s exposure time and decreased from 90 to 10% for OMSE over a 160 s exposure time. The mechanisms of each stage of surgical gown treatment by plasma are described. In this study, the mechanical properties of the untreated and treated surgical gown samples such as the tensile strength and elongation percentage, ultimate tensile strength, yield strength, strain hardening, resilience, toughness, and fracture (breaking) point were studied. Plasma had a more positive effect on the mechanical properties of the OMSE reactor than those of the OMTSE reactor.

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The Effect of Yarn Linear Density on Mechanical Properties of Plain Woven Kenaf Reinforced Unsaturated Polyester Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.465-466.962 ◽

2013 ◽

Vol 465-466 ◽

pp. 962-966 ◽

Cited By ~ 4

Author(s):

Mohd Pahmi bin Saiman ◽

Mohd Saidin Bin Wahab ◽

Mat Uzir Wahit

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Linear Density ◽

Unsaturated Polyester ◽

Composite Panel ◽

Composite Yarn ◽

Polyester Composite ◽

The Impact ◽

Woven Kenaf

To produce a good quality of dry fabric for reinforced material in a natural-based polymer composite, yarn linear density should be in consideration. A woven kenaf dry fabric with three different linear densities of 276tex, 413.4tex and 759tex were produced. The fabrics with different linear densities were been optimize with the assistance of WiseTex software. The optimized dry fabrics were infused with unsaturated polyester to produce composite panel using vacuum infusion process. The composites properties were tested on the tensile strength, flexural strength and the impact strength. The result shows that the mechanical properties of the composite increased when the yarn linear densities increased.

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The Effect of Borax Solution as Preservative to the Mechanical Properties of Bamboo

International Journal of Sustainable Construction Engineering Technology ◽

10.30880/ijscet.2020.11.02.009 ◽

2020 ◽

Vol 11 (2) ◽

Author(s):

M.A.P Handana ◽

◽

Besman Surbakti ◽

Rahmi Karolina ◽

◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Bending Strength ◽

Environmentally Friendly ◽

Preservative Solution ◽

Borax Solution ◽

Preservative Solutions

The use of borax solution as a preservative in wood and bamboo materials is well known in the community. A borax solution is an environmentally friendly liquid that can dissolve in water, so it is suitable to be used as a preservative within cold or hot soaking techniques. The ability of borax to resist insects and fungus attacks on bamboo has been proven, but the effect of the solution on the strength of bamboo must also be investigated. This study conducts to investigate the effects of borax and its additives as preservative solutions to the mechanical properties of bamboos. The bamboos preservations were conducted by cold conditions of immersion, while the mechanical properties were performed to understand the effects of preservatives. The result of this study indicated that 30% to 50% borax in the preservative solution is sufficient to provide significant increase in strength for compressive strength, tensile strength, and bending strength of bamboo specimen. From this study, the use of borax solution in preserving the bamboos materials improved the quality of bamboos based on its mechanical properties.

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PENGARUH PENGGUNAAN TANAH MEDITERAN SEBAGAI BAHAN SUBSTITUSI SEMEN TERHADAP KUAT TEKAN DAN TARIK BETON

ATRIUM - Jurnal Arsitektur ◽

10.21460/atrium.v5i2.74 ◽

2020 ◽

Vol 5 (2) ◽

pp. 59-71

Author(s):

Sri Devi Nilawardani

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Coarse Aggregate ◽

Comparative Method ◽

Fine Aggregate ◽

Main Ingredient ◽

Normal Concrete ◽

Long Run ◽

Cement Manufacture ◽

Initial Idea

Title: The Effect of Using Mediteran Soil as Cement Substitution Materials in Compressive Strength and Tensile Strength of Concrete Concrete is a composite material (mixture) of cement, fine aggregate, coarse aggregate, and water. The potential of limestone in Indonesia is very large, reaching 28.678 billion tons which is the main ingredient in the cement manufacture. In the long run it will be depleted because it is a non-renewable natural resources. So to reduce the use of limestone the utilization of Mediteran soil as a substitution for some cement in the manufacture of concrete is required. The initial idea is based on the chemical composition contained in the Mediteran soil almost identical to the cement, which is carbonate (CaO) and silica (SiO2). The purpose of this research is to reveal the influence of substitution of Mediteran soil by 20% and 40% in the compressive strength and tensile of the concrete at age 3, 7, 14, and 28 days with the number of test specimen each 3 pieces on each variation in 10cm x20cm cylinder with planning of concrete mixture refers to SK SNI method T-15-1900-03. The type of research used is quantitative with the experimental method of laboratory test and data analysis of comparative method and regression. The results show that compressive strength and tensile strength of concrete using Mediteran soil substitution comparable to the strength of normal concrete with dry treatment. In the composition of 20% Mediteran soils decreased by 51.35% or 7.9 MPa (compressive strength) and 30.60% or 0.93 MPa (tensile strength). While the composition of 40% Mediteran soil decreased by 43.78% or 9.13 MPa (compressive strength) and 2.24% or 1.31 MPa (tensile strength).

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Predicting the Mechanical Properties of RCA-Based Concrete Using Supervised Machine Learning Algorithms

Materials ◽

10.3390/ma15020647 ◽

2022 ◽

Vol 15 (2) ◽

pp. 647

Author(s):

Meijun Shang ◽

Hejun Li ◽

Ayaz Ahmad ◽

Waqas Ahmad ◽

Krzysztof Adam Ostrowski ◽

...

Keyword(s):

Machine Learning ◽

Mechanical Properties ◽

Mean Square Error ◽

Coarse Aggregate ◽

Machine Learning Algorithms ◽

Supervised Machine Learning ◽

Environmental Damage ◽

Fine Aggregate ◽

Mean Square ◽

The Impact

Environment-friendly concrete is gaining popularity these days because it consumes less energy and causes less damage to the environment. Rapid increases in the population and demand for construction throughout the world lead to a significant deterioration or reduction in natural resources. Meanwhile, construction waste continues to grow at a high rate as older buildings are destroyed and demolished. As a result, the use of recycled materials may contribute to improving the quality of life and preventing environmental damage. Additionally, the application of recycled coarse aggregate (RCA) in concrete is essential for minimizing environmental issues. The compressive strength (CS) and splitting tensile strength (STS) of concrete containing RCA are predicted in this article using decision tree (DT) and AdaBoost machine learning (ML) techniques. A total of 344 data points with nine input variables (water, cement, fine aggregate, natural coarse aggregate, RCA, superplasticizers, water absorption of RCA and maximum size of RCA, density of RCA) were used to run the models. The data was validated using k-fold cross-validation and the coefficient correlation coefficient (R2), mean square error (MSE), mean absolute error (MAE), and root mean square error values (RMSE). However, the model’s performance was assessed using statistical checks. Additionally, sensitivity analysis was used to determine the impact of each variable on the forecasting of mechanical properties.

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The Impact of Slicing Softwares on the Mechanical Properties of 3D Printed Parts

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b3668.079220 ◽

2020 ◽

Vol 9 (2) ◽

pp. 487-494

Keyword(s):

Mechanical Properties ◽

Surface Roughness ◽

Tensile Strength ◽

Ultimate Tensile Strength ◽

3D Printer ◽

Stl File ◽

3D Printed ◽

Intersection Curves ◽

The Impact

“Slicing tool” or “Slicing Software” computes the intersection curves of models and slicing planes. They improve the quality of the model being printed when given in the form of STL file. Upon analyzing a specimen that has been printed using two different slicing tools, there was a drastic variation on account of the mechanical properties of the specimen. The ultimate tensile strength and the surface roughness of the material vary from one tool to another. This paper reports an investigation and analysis of the variation in the ultimate tensile strength and the surface roughness of the specimen, given that the 3D printer and the model being printed is the same, with a variation of usage of slicing software. This analysis includes ReplicatorG, Flashprint as the two different slicing tools that are used for slicing of the model. The variation in the ultimate tensile strength and the surface roughness are measured and represented statistically through graphs. An appropriate decisive conclusion was drawn on the basis of the observations and analysis of the experiment on relevance to the behavior and mechanical properties of the specimen.

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Experimental Study on Mechanical Properties of Fine Aggregate Concrete Made after Wet-Sieving Coarse Aggregate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.168-170.2200 ◽

2010 ◽

Vol 168-170 ◽

pp. 2200-2203 ◽

Cited By ~ 1

Author(s):

Shun Bo Zhao ◽

Na Liang ◽

Li Xin Liu ◽

Li Sun ◽

Su Yang

Keyword(s):

Mechanical Properties ◽

Elastic Modulus ◽

Coarse Aggregate ◽

Fine Aggregate ◽

Concrete Wall ◽

Aggregate Concrete ◽

Structural Wall ◽

Ordinary Concrete ◽

Reinforced Composite ◽

Wet Sieving

The validity of the wet-sieving concrete technique for building the reinforced composite concrete wall are demonstrated in the paper. The fine aggregate concrete made by ordinary concrete passing the sieve with square mash of 15 mm was cast for the surface layer, the recomposed concrete mixed by the residual concrete stayed on the sieve with the ordinary concrete was cast for the reinforced concrete structural wall. The mechanical properties such as the cubic and compressive strengths, the elastic modulus and the splitting and flexural tensile strengths of the fine aggregate concrete, the recomposed concrete and the ordinary concrete were tested and analyzed. The results show that the elastic modulus and splitting tensile strength of fine aggregate concrete reduce in some extent compared with that of ordinary concrete, the mechanical properties of recomposed concrete are almost the same as that of ordinary concrete.

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Low-Pressure Membrane for Water Treatment Applications

International Journal of Polymer Science ◽

10.1155/2020/8893027 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7

Author(s):

Huda AlFannakh ◽

Heba Abdallah ◽

S. S. Ibrahim ◽

Basma Souayeh

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Drinking Water ◽

Humic Acid ◽

Tap Water ◽

Permeate Flux ◽

Membrane Performance ◽

Polyethersulfone Membrane ◽

Contaminated Drinking Water

Three ultrafiltration membranes were prepared using phase separation techniques. The membranes were characterized by scan electron microscope, porosity, pore size distribution measurement, and mechanical properties. The membrane performance was carried out using synthetic solutions from humic acid and tap water to express the contaminated drinking water. The polyvinylidene difluoride (M2) has the highest tensile strength 33.2 MPa with elongation of 52.3%, while polyacrylonitrile (M3) has the lowest mechanical properties, tensile strength 16.4 MPa with elongation of 42.7%. Polyethersulfone membrane (M1) provides the highest removal of humic acid, which was 99.5, 98.8, and 98.2% using feed concentrations 0.1, 0.3, and 0.5 g/l, respectively, while M3 provides the highest permeate flux which was 250, 234.4, and 201.4 l/m2 h using feed concentrations 0.1, 0.3, and 0.5 g/l, respectively. Analysis of water samples indicates that the prepared membranes can be used to treat the contaminated drinking water which produced the high quality of drinking water after treatment.

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