Experimental Study on the Effect of Adding Carbon Black Powder on Tensile Strength of LDPE Films under Artificial Weathering Condition

2013 ◽  
Vol 330 ◽  
pp. 32-36
Author(s):  
S.A.M. Rezavand ◽  
S. Falah Kordi ◽  
T. Azdast
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Tensile Stress ◽  
Uv Light ◽  
Extrusion Process ◽  
Strength Test ◽  
Artificial Weathering ◽  
Tensile Strength Test ◽  
Carbon Black Powder ◽  
Plastic Parts

The properties of plastic parts that used for outdoor applications are changed under weathering conditions. Weathering involves considering the effects of solar radiation, temperature, humidity, pollutants. By adding some additives such as carbon black, TiO2, Hals and Tinuvin, the weathering effect could be decreased. In this study, LDPE films by adding different percentages (0.1, 0.5 and 1%) of carbon black (C.B.) with 0.2 mm thickness were produced by extrusion process. Samples were cut according to ASTM D882 and to accelerate the tests, samples located in accelerated artificial weathering device up to 1400 hour. The device was set at 40°C and humidity of 50%. Required samples for tensile strength test bring out of device at selected period and tensile strength was done by 350 mm/min strain rate. The results show that samples containing carbon black have tensile stress and elongationmore than the clear films. Carbon black absorbs UV light and heat that causing to delay in broken links and destroying the molecular. The optimum percent for tensile stress was 0.5 and for elongation was 1% C.B.

scholarly journals PENGARUH PENGGUNAAN LIMBAH PLASTIK POLYPROPYLENE (PP) SEBAGAI CAMPURAN AGREGAT KASAR TERHADAP KUAT TEKAN DAN TARIK PADA BETON FC’ 25 MPA

2019 ◽  
Vol 3 (2) ◽  
pp. 81-89
Author(s):  
Angga Pirman Firdaus ◽  
Jonbi
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Strength Test ◽  
Plastic Waste ◽  
Concrete Mixture ◽  
Strength Testing ◽  
Concrete Compressive Strength ◽  
Tensile Strength Test ◽  
Compressive Strength Test ◽  
Waste Mixture

Indonesia ranks second in the world's largest plastic waste producer after China. Each year, Indonesia can contributeup to 187.2 million tons of plastic waste, while China reaches 262.9 million tons of plastic waste. Based on the data, one way to utilize plastic waste by using plastic waste as a mixture of concrete, where the plastic used is polypropylene (PP) plastic with different percentage of concrete mixture, the test includes compressive strength test and tensile concrete. The results of concrete compressive strength testing with polypropylene (PP) plastic waste mixture of 5%, 10% and 15% at age 28 in aggregate aggregate mixture decreased by 5.15%, 6.89% and 13.53%. As for the result of concrete tensile strength test with polypropylene (PP) plastic waste mixture of 5%, 10% and 15% at age 28 in crude aggregate mixture decreased 17,61%, 24,13% dan 23,24%.

scholarly journals An Innovative Test Method for Tensile Strength of Concrete by Applying the Strut-and-Tie Methodology

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2776 ◽  
Author(s):  
Wen-Cheng Liao ◽  
Po-Shao Chen ◽  
Chung-Wen Hung ◽  
Suyash Kishor Wagh
Keyword(s):  
Tensile Strength ◽  
Test Methods ◽  
Standard Test ◽  
Strength Test ◽  
Tension Test ◽  
Test Method ◽  
Direct Tension ◽  
Direct Tension Test ◽  
Strut And Tie ◽  
Tensile Strength Test

Tensile strength is one of the important mechanical properties of concrete, but it is difficult to measure accurately due to the brittle nature of concrete in tension. The three widely used test methods for measuring the tensile strength of concrete each have their shortcomings: the direct tension test equipment is not easy to set up, particularly for alignment, and there are no standard test specifications; the tensile strengths obtained from the test method of splitting tensile strength (American Society for Testing and Materials, ASTM C496) and that of flexural strength of concrete (ASTM C78) are significantly different from the actual tensile strength owing to mechanisms of methodologies and test setup. The objective of this research is to develop a new concrete tensile strength test method that is easy to conduct and the result is close to the direct tension strength. By applying the strut-and-tie concept and modifying the experimental design of the ASTM C78, a new concrete tensile strength test method is proposed. The test results show that the concrete tensile strength obtained by this proposed method is close to the value obtained from the direct tension test for concrete with compressive strengths from 25 to 55 MPa. It shows that this innovative test method, which is precise and easy to conduct, can be an effective alternative for tensile strength of concrete.

scholarly journals Influence of nicotine on healing of vesical sutures in rabbits

2007 ◽  
Vol 22 (6) ◽  
pp. 479-484 ◽  
Author(s):  
Christiano Machado ◽  
Eduardo Wei Kin Chin ◽  
Sérgio Ossamu Ioshii ◽  
Renato Tâmbara Filho ◽  
Aline Von Bathen
Keyword(s):  
Tensile Strength ◽  
Statistical Difference ◽  
Saline Solution ◽  
Healing Process ◽  
Bladder Wall ◽  
Inflammatory Cells ◽  
Strength Test ◽  
Control Group ◽  
Time Intervals ◽  
Tensile Strength Test

PURPOSE: To study the effects of nicotine on inflammatory cells, deposition of collagen and its interference on the strength of tissue in vesical sutures in rabbits. METHODS: Twenty New Zealand rabbits were used, randomized into two groups: group N, consisting of 10 animals, to which nicotine was administered in the dose of 2mg/kg of weight as a subcutaneous injection, diluted in 1ml of saline solution at 0.9% in a daily administration during the 28 days prior to the surgery; and group C, consisting of 10 animals, to which saline solution at 0.9% was administered in the same conditions and time intervals of the nicotine group. All the animals underwent cystotomy and suture of the bladder wall 28 days after the administration of nicotine or saline solution. The measurements were performed on the fourth and seventh day in each group after cystectomy and euthanasia of the animals. A fragment of bladder was removed and sent for a tensile strength test to evaluate the tissue strength and another fragment underwent a histological analysis of inflammatory process and deposition of collagen. RESULTS: There was a decrease of neutrophils on the fourth postoperative day (p=0.079) and an increase of plasmocytes on the seventh postoperative day (p=0.053) in the animals that were given nicotine, without statistical difference in relation to the control group. In the analysis of the proliferation of fibroblasts, deposition of collagen and tensile strength test, there was no statistical difference in relation to the control group. CONCLUSION: The administration of nicotine in rabbits did not influence the healing process of vesical suture in relation to the inflammatory cells, deposit of collagen and tissue strength of the suture.

scholarly journals Fracture Mechanism of Interpenetrating Iron-Tricalcium Phosphate Composite

2016 ◽  
Vol 258 ◽  
pp. 333-336
Author(s):  
Miroslava Horynová ◽  
Mariano Casas Luna ◽  
Edgar Benjamin Montúfar Jimenéz ◽  
Sebastián Díaz de la Torre ◽  
Ladislav Čelko ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Spark Plasma Sintering ◽  
Tricalcium Phosphate ◽  
Fracture Mechanism ◽  
Bone Fractures ◽  
Strength Test ◽  
Tensile Strength Test ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Diametral Tensile Strength

The usage of iron alloys for bone fractures treatment has been limited due to its high density and elastic modulus, as compared to bone. In contrast, the use of tricalcium phosphate (TCP), a ceramic that promotes bone healing, is mostly limited by its brittle nature. In the present work the fracture mechanism of a novel iron-TCP interpenetrated composite fabricated by spark plasma sintering was studied. Specimens were subjected to a diametral tensile-strength-test. The work of fracture was determined by indirect tensile loading conditions using the diametral tensile strength test. The results revealed that iron has a clear toughening effect on the microstructure of tricalcium phosphate specimens consolidated by spark plasma sintering. This is a promising result to overcome the limited usage of tricalcium phosphate to treat only non-load bearing bone defects.

scholarly journals New approach of concrete tensile strength test

2020 ◽  
Vol 12 ◽  
pp. e00347 ◽  
Author(s):  
Sa’ad Fahad Resan ◽  
Samir Mohammed Chassib ◽  
Sajid Kamil Zemam ◽  
Mustafa Jabar Madhi
Keyword(s):  
Tensile Strength ◽  
Strength Test ◽  
New Approach ◽  
Tensile Strength Test
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