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A Comparative Study on Compressive Strength of Concrete Mix Containing Plastic, Glass and Rubber Aggregates
Khandaker Samin Atif,
Md. Asadullah-Al-Galib,
Nabil Ahmed,
Nayem Hasan,
Saurav Barua
Issue:
Volume 5, Issue 4, December 2020
Pages:
97-102
Received:
20 July 2020
Accepted:
30 July 2020
Published:
4 November 2020
Abstract: In this study, the behavior of the recycled plastic, glass and rubber tire as partial replacement of coarse aggregate in concrete have been investigated. Polyethylene terephthalate (PET) bottles, one of the waste plastic types, broken glass of bottles and rubber tires are used for these purposes. The reason to choose these to transfer the recycles materials into valuable product and to solve the problem of dumping the tons of plastic waste, broken glass and rickshaw tires. In this study compressive strength of cylinder concrete specimens were carried out at 7 and 28 days curing. Six concrete mixes have been studied, those are—reference specimens with no recycled material (CS0), specimens with 15% plastic (CSP15), specimens with 15% (CSR15) and 30% (CSR30) tire, specimens with 15% (CSG15) and 30% (CSG30) glass. Total 24 cylindrical specimen of 8”x4” were tested for compressive strength. The order of compressive strength was CS0 > CSG30 > CSG15 > CSR15 > CSR30 > CSP15. The Study found that compressive strength of concrete mix decreases with the increase of plastic and rubber content. However, compressive strength of concrete increases with the increase of glass content. Plastic material have low bonding with cement in concrete and perform poorly. On contrary, glass works very well with concrete and compressive strength of concrete reduces with the increase of rubber content.
Abstract: In this study, the behavior of the recycled plastic, glass and rubber tire as partial replacement of coarse aggregate in concrete have been investigated. Polyethylene terephthalate (PET) bottles, one of the waste plastic types, broken glass of bottles and rubber tires are used for these purposes. The reason to choose these to transfer the recycles ...
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Reliable Guaranteed Cost Control of Uncertain Systems with Nonlinear Perturbations
Issue:
Volume 5, Issue 4, December 2020
Pages:
103-111
Received:
10 October 2020
Accepted:
23 October 2020
Published:
4 November 2020
Abstract: Network control system (NCS) is a distributed real-time feedback control system with the continuous development of network technology. It is generally composed of network, controller, actuator and sensor. It has brought great convenience to people in many fields, but it also has many problems, which makes the research of control system more complicated. Recently, there have been some efforts to tackle the reliable guaranteed cost controller design problem, and some good results have also been obtained for the continuous-time and for the discrete-time. However, there have been few results in the literature of an investigation for the reliable guaranteed cost controller design of nonlinear uncertain systems with time-varying state delay and actuator failure. This paper concerns the reliable guaranteed cost control problem of uncertain systems with time-varying state delay and nonlinear perturbations for a given quadratic cost function. The problem is to design a reliable guaranteed cost state feedback control law which can tolerate actuator failures, such that the closed-loop system is asymptotically stable and the closed-loop cost function value is not more than a specified upper bound. Firstly, the existence condition of reliable guaranteed cost control law is given by constructing Lyapunov stability function and using linear matrix inequality (LMI). Secondly, the design method of the optimal reliable guaranteed cost controller is given by solving the convex optimization problem with LMI constraints, which minimizes the upper bound of guaranteed cost for closed-loop systems. In the end, the numerical simulation result illustrates the effectiveness of the proposed method.
Abstract: Network control system (NCS) is a distributed real-time feedback control system with the continuous development of network technology. It is generally composed of network, controller, actuator and sensor. It has brought great convenience to people in many fields, but it also has many problems, which makes the research of control system more complic...
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Effect of Different Softeners on Dimensional Stability and Color Fastness Properties of Stretch Denim Fabric
Faruq Hosen,
Md. Zayedul Hasan,
A. K. M. Ayatullah Hosne Asif
Issue:
Volume 5, Issue 4, December 2020
Pages:
112-119
Received:
16 October 2020
Accepted:
28 October 2020
Published:
11 November 2020
Abstract: This study was designed to investigate the effect of different softeners on dimensional stability and color fastness properties of stretch denim fabric. Stretch denim fabric was washed using enzyme concentration of 4.0 g/l for 30 minutes in 40°C temperature at pH 5.5 and then different softeners were applied in conjunction with standard recipes. Different color fastness properties, dimensional stability were analyzed in combination with enzyme wash and stone enzyme wash along with cationic, anionic, nonionic, micro silicone, macro silicone and nano silicone softeners. Stone enzyme wash treated with different softeners on stretch denim fabric demonstrated better performance in case of different color fastness properties rather than enzyme wash. No significant change was observed for application of different kinds of softeners on enzyme wash and stone enzyme treated stretch denim fabric regarding the grade of color change and color staining for color fastness to light and color fastness to water. Silicone-based softeners illustrated better performance for color fastness to washing than other softeners for both enzyme wash and stone enzyme wash. Cationic softener proven excellent durability and suitability towards multiple washes rather than other softeners. The GSM of stretch denim fabric also increased accordingly after applying different softeners rather than untreated stretch denim fabric. From scanning electron microscope images, stretch denim fabric sample treated with enzyme and cationic, micro silicone softeners implied less ruptures and less cracks rather than stone enzyme treated with cationic, micro silicone softeners.
Abstract: This study was designed to investigate the effect of different softeners on dimensional stability and color fastness properties of stretch denim fabric. Stretch denim fabric was washed using enzyme concentration of 4.0 g/l for 30 minutes in 40°C temperature at pH 5.5 and then different softeners were applied in conjunction with standard recipes. Di...
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