Plastic Sheeting 150gsm vs. 170gsm By Megan Dilloway and Gordon - - PowerPoint PPT Presentation

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Plastic Sheeting 150gsm vs. 170gsm By Megan Dilloway and Gordon - - PowerPoint PPT Presentation

Oct 19, 2022 22 likes •192 views

Plastic Sheeting 150gsm vs. 170gsm By Megan Dilloway and Gordon Browne Background A manufacture is offering a lighter weight reinforced woven plastic sheet. Field and Laboratory tests have been initiated. Field tests are located in:

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Plastic Sheeting

150gsm vs. 170gsm By Megan Dilloway and Gordon Browne

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Background

A manufacture is offering a lighter weight reinforced woven plastic sheet. Field and Laboratory tests have been initiated.

Field tests are located in:

  • South Sudan
  • Zimbabwe
  • Bristol
  • Oxford

Laboratory tests were conducted at Southampton Solent University.

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To be able to produce a comparative table that may aid Oxfam in a decision on the use of the 150gsm plastic sheeting as a replacement of the currently used 170gsm.

Aim of Research Project

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1. To conduct prolonged exposure field tests that replicate the locations in which it will be used. 2. To conduct laboratory tests to determine the tensile strength of the samples 3. To conduct laboratory tests to determine the tensile strength of the samples with exposure to high temperatures. 4. To construct laboratory tests to determine the strength of fixings currently in use and possible new fixing methods.

Objectives

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Exposure Testing

170gsm 150gsm

31st December 2012 – Field Test Started. Bristol Oxford

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31st January 2013 – Inspection 1 (30 days).

Exposure Testing – First Inspection

170gsm 150gsm

Bristol Oxford

170gsm 150gsm

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Testing Standards

Where possible the samples were tested in accordance with: BS EN ISO 13934-1:1999

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150gsm vs. 170gsm 150gsm 170gsm

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Pilot Test

  • Results

The results from a pilot test established the rate at which the samples would be tested:

  • 20mm/min
  • 200mm/min

The results lead to the decision that both rates would be used where appropriate to allow for a wider range of results.

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Tensile Strength

  • Results

The results obtained indicated that for both rates of testing the 150gsm performed better than the 170gsm.

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Current emergencies: Syria and South-Sudan Maximum temperatures: Syria 46C South-Sudan 42C Plastic Sheeting was heated to a temperature between 45-50C and then tested.

Exposure to Heat

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Exposure to Heat

  • Results
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Exposure to Heat

  • Conclusion

Result Conclusion: The plastics tensile strength is significantly lower when subject to high temperatures.

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Fixing Methods

Previous research into the different types of fixing was conducted by Solent University with Oxfam in 2007. The results obtained can be found at: http://www.plastic-sheeting.org/ These tests were repeated with the two samples of plastic.

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Fixing Methods – Pilot Test

Aim: To establish which rate should be used during the testing. Reason: Time constraints. Fixing method: Plastic Eyelets Conclusion: 20mm/min Note: In both tests the plastic eyelet failed before the plastic sheeting.

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Fixing Methods – Results

Please note: The sample size for the stone method was double the width (100mm) compared with the other samples (50mm)

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Conclusion Overall

The 150gsm plastic sheeting has performed better than the 170gsm in all the preliminary tests. Further research:

  • Effects of heat on the plastic sheeting.

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