An investigation of inorganic fillers on rheological properties and tensile strength of epoxy repair coating using mixture design method

2021 ◽  
Vol 307 ◽  
pp. 124866
Author(s):  
Jianhui Tang ◽  
Yin Bai ◽  
Xudong Chen
Keyword(s):  
Tensile Strength ◽  
Rheological Properties ◽  
Design Method ◽  
Mixture Design ◽  
Inorganic Fillers

Enhancing the tensile strength of SiC reinforced aluminium- based functionally graded structure through the mixture design approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
M. Poornesh ◽  
Shreeranga Bhat ◽  
E.V. Gijo ◽  
Pavana Kumara Bellairu
Keyword(s):  
Tensile Strength ◽  
Composite Structure ◽  
Centrifugal Casting ◽  
Matrix Material ◽  
Stir Casting ◽  
Mixture Design ◽  
Functionally Graded ◽  
Content Type ◽  
Functionally Graded Composite ◽  
The Matrix

PurposeThis article aims to study the tensile properties of a functionally graded composite structure with Al–18wt%Si alloy as the matrix material and silicon carbide (SiC) particles as the reinforcing element. More specifically, the study's primary objective is to optimize the composition of the material elements using a robust statistical approach.Design/methodology/approachIn this research, the composite material is fabricated using a combination of stir casting and the centrifugal casting technique. Moreover, the test specimen required to study the tensile strength are prepared according to the ASTM (American Society for Testing and Materials) standards. Eventually, optimal composition to maximize the tensile property of the material is determined using the mixture design approach.FindingsThe investigation results imply that the addition of the SiC plays a crucial role in increasing the tensile strength of the composite. The optical microstructural images of the composite show the adequate distribution of the reinforcing particles with the matrix. The proposed regression model shows better predictability of tensile strength. In addition, the methodology aids in optimizing the mixture component values to maximize the tensile strength of the produced functionally graded composite structure.Originality/valueLittle work has been reported so far where a hypereutectic Al–Si alloy is considered the matrix material to produce the composite structure. The article attempts to make a composite structure by using a combination of stir casting and centrifugal casting. Furthermore, it employs the mixture design to optimize the composition and predict the model of the study, which is one of a kind in the field of material science.

scholarly journals Pengaruh Jenis dan Konsentrasi Bahan Pemlastis terhadap Bioplastik Glukomanan

2021 ◽  
Vol 9 (1) ◽  
pp. 75
Author(s):  
Aditya Nandika A.J ◽  
Bambang Admadi Harsojuwono ◽  
I Wayan Arnata
Keyword(s):  
Tensile Strength ◽  
Polyethylene Glycol ◽  
Design Method ◽  
Elongation At Break ◽  
Method Factor ◽  
Randomized Design ◽  
Multiple Comparison Test ◽  
Completely Randomized Design ◽  
Time Variables ◽  
Degradation Time

This research aims to determine the effect of plasticizer types and concentrations on the characteristics of glucomannan bioplastics, and to determine the types and concentrations of plasticizers that can produce glucomannan bioplastics with the best characteristics. This experimental design used a completely randomized design method. Factor I is a type of plasticizer consisting of glycerol, sorbitol, propanol-2, and polyethylene glycol. The second factor is the concentration of plasticizers which consists of 4 levels, namely 0.5%: 1.5%: 2.5%: 3.5%. The experiment resulted in 16 treatment combinations and grouped into 2 groups to obtain 32 experimental units. The data were analyzed for their diversity and continued with the Duncan multiple comparison test. The results showed that the type and concentration of plasticizers had a very significant effect on tensile strength, elongation at break, modulus young, and swelling. The interaction has a very significant effect on tensile strength and expansion and has a significant effect on the elasticity of glucomannan bioplastics. Meanwhile, the type and concentration of plasticizers had no significant effect on the length of biodegradation. The best glucomannan bioplastic was obtained in the treatment of glycerol plasticizers with a concentration of 1.5 % with a tensile strength value of 6.17 MPa, elongation at break of 21.50 %, elasticity 28.72 MPa development 25.84 %, and degradation time of 8 days. Bioplastics produced in this study have meet the SNI 7188.7:2016 standards in the elongation test at break and standards ASTM 5336 in the degradation time variables. The resulting bioplastic has not met SNI on the tensile strength, modulus young, and swelling variables. Keywords : bioplastic, glucomannan, glycerol, polyethylene glycol, propanol-2, sorbitol

scholarly journals Pengaruh Campuran dan Rasio Bahan Pembentuk Komposit terhadap Karakteristik Komposit Bioplastik

2021 ◽  
Vol 9 (2) ◽  
pp. 157
Author(s):  
Syah Banu Putra Sitepu ◽  
Bambang Admadi Harsojuwono ◽  
Amna Hartiati
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Composite Materials ◽  
Design Method ◽  
Block Design ◽  
Elongation At Break ◽  
Factor I ◽  
Method Factor ◽  
Randomized Block Design ◽  
Multiple Comparison Test

This research aims to determine the effect of the mixture and the ratio of the composites and their interactions to the characteristics of the bioplastic composites and to determine the mix and ratio of the composites that produce the best characteristics of the bioplastic composites. The experimental design of this study used a randomized block design method. Factor I is a mixture of composite materials consisting of maizena-glucomannan, maizena-chitosan, and maizena-carrageenan. The second factor is the ratio of the composite material mixture which consists of 5 levels, namely 100: 0, 75:25, 50:50, 25:75 and 0: 100. The experiment resulted in 15 treatment combinations and were grouped into 2 groups when the process of making bioplastic composites was obtained, so that 30 experimental units were obtained. Data were analyzed for their diversity and continued with Duncan's multiple comparison test. The observed variables which tensile strength, elongation at break, modulus young, swelling, and biodegradation time. The results showed that the mixture and the ratio of the composites forming a very significant effect on tensile strength, elongation at break, elasticity, and swelling. The interaction has a very significant effect on tensile strength, elasticity and swelling and significantly affects the elongation at break of bioplastic composites. Meanwhile, the mixture and the ratio of the ingredients to form the composites had no significant effect on the biodegradation time. Maizena:glucomannan composite with ratio (25:75) produced the best characteristics of bioplastic composites with tensile strength values of 6.99 MPa, elongation at break of 16.5%, elasticity 42.39 MPa, swelling 78.78% and biodegradable time of 7 days. There are 2 variables that have met the standard, namely: elongation at break of bioplastic composites that meet the plastic Standard SNI 7188.7: 2016 and biodegradation time has met the international plastic standard ASTM 5336 and 3 variables that do not meet the standards, namely: Tensile strength (6,99 MPa) and elasticity (42,39 MPa) do not meet the Plastic Standard SNI 7188.7: 2016 and swelling (39,1%) does not meet international plastic standards (EN 317). Keywords : bioplastic composites, maizena, glucomannan, chitosan, carrageenan

scholarly journals Optimal Mixture Design of Low-CO2 High-Volume Slag Concrete Considering Climate Change and CO2 Uptake

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Han-Seung Lee ◽  
Seung-Min Lim ◽  
Xiao-Yong Wang
Keyword(s):  
Climate Change ◽  
Design Method ◽  
High Strength ◽  
High Volume ◽  
Mixture Design ◽  
Control Factor ◽  
Co2 Uptake ◽  
Uptake Ratio ◽  
Carbonation Depth ◽  
Low Co2

Abstract High-volume slag (HVS) can reduce the CO2 emissions of concrete, but increase the carbonation depth of concrete. In particular, because of the effects of climate change, carbonation will accelerate. However, the uptake of CO2 as a result of carbonation can mitigate the harm of CO2 emissions. This study proposes an optimal mixture design method of low-CO2 HVS concrete considering climate change, carbonation, and CO2 uptake. Firstly, net CO2 emissions are calculated by subtracting the CO2 emitted by the material from the uptake of CO2 by carbonation. The strength and depth of carbonation are evaluated by a comprehensive model based on hydration. Secondly, a genetic algorithm (GA) is used to find the optimal mixture. The objective function of the GA is net CO2 emissions. The constraints of the GA include the strength, carbonation, workability, and range of concrete components. Thirdly, the results show that carbonation durability is a control factor of the mixture design of low-strength HVS concrete, while strength is a control factor of the mixture design of high-strength HVS concrete. After considering climate change, the threshold of strength control increases. With the increase of strength, the net CO2 emissions increase, while the CO2 uptake ratio decreases.

Mixture design of concrete using simplex centroid design method

2018 ◽  
Vol 89 ◽  
pp. 76-88 ◽  
Author(s):  
Dengwu Jiao ◽  
Caijun Shi ◽  
Qiang Yuan ◽  
Xiaopeng An ◽  
Yu Liu
Keyword(s):  
Design Method ◽  
Mixture Design

Tensile strength of bolted ring-type splices of solid round leg members of guyed communication towers

2005 ◽  
Vol 32 (3) ◽  
pp. 595-600
Author(s):  
Cindy Kumalasari ◽  
Lihong Shen ◽  
Murty K.S Madugula ◽  
Faouzi Ghrib
Keyword(s):  
Tensile Strength ◽  
Design Method ◽  
Test Results ◽  
American Institute ◽  
Ring Type ◽  
Canadian Institute ◽  
Steel Construction ◽  
Failure Loads ◽  
Guyed Towers ◽  
Communication Towers

Bolted ring-type splices are very common in guyed communication towers using solid round legs 65 mm in diameter or smaller, but there is no guidance provided in either the Canadian Institute of Steel Construction Handbook of steel construction or the American Institute of Steel Construction Manual of steel construction for the design of such splices. Eighteen ring-type splices (three groups of six specimens each) were tested and experimental failure loads were determined. Based on the test results, it is concluded that it is unsafe to ignore the eccentricity of the splice. It is suggested that the load at first yield be conservatively taken as the strength of the splice. A simplified design method is proposed that takes into account the eccentricity of the splice, and the results from the proposed method agree closely with the experimental values.Key words: eccentricity of splice, guyed towers, ring-type splice, solid round legs, tensile strength.

Cement Mortar with Nanosilica: Experiments with Mixture Design Method

2016 ◽  
Vol 113 (1) ◽  
Author(s):  
Mohamed Fattouh Abd El Hameed ◽  
Mariam Farouk Ghazy ◽  
Metwally Abd Allah Abd Elaty
Keyword(s):  
Cement Mortar ◽  
Design Method ◽  
Mixture Design

Study on Crystallization and Rheological Behavior of PEN/PET Blends

2013 ◽  
Vol 830 ◽  
pp. 72-75 ◽  
Author(s):  
Cheng Zhi Chuai ◽  
Kai Li
Keyword(s):  
Tensile Strength ◽  
Rheological Property ◽  
Rheological Properties ◽  
Rheological Behavior ◽  
Impact Resistance ◽  
Crystallization Rate ◽  
Nucleating Agent

The crystallization and rheological properties of PET were studied by using capillary remoter and plate remoter in the paper. The results showed that the addition of PEN could improve the rheological property of PEN/PET blends and the addition of PC could improve the toughness of PEN/PET blends. Besides, Nucleating agent could accelerate the crystallization rate and form crystal particles with small dense in order to improve the properties of impact resistance, tensile strength and transparency of products.

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