A Parametric Study on the Cementation of Polyethylene Terephthalate (PET) and Coloured Glass Bottles into Concrete Hollow Blocks (CHB)

Author : Mangubat, June Iris Aidyl Andaya
Major Adviser : Abrigo, Casiano S. Jr.
Committee Members : Bataller, Butch G.; Dikitanan, Johanna Marie R.
Month : April
Type : Thesis
Degree: BS
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Compressive strength, density, and water absorption of hollow blocks incorporated with waste glass and PET were measured. PET-glass proportion was varied from 0-0, 0-20, 10-10, 20-0, 0-30, 15-15, and 30-0% by volume at constant 15% (v/v) cement. Compressive strength and density increased up to 20% PET after which it decreased, while water absorption decreased with increasing PET up to 20% after which it increased. Addition of Saharaᵀᴹ in the mixture did not significantly decrease the percentage absorption. Hollow blocks incorporated only with glass showed an increase in the compressive strength and water absorption up to 20% after which these decreased. The strength did not meet the PNS even for Type II blocks. From the results, it is not recommended to use glass as sole coarse aggregate because it is reactive and should be used with pozzolan to remediate ASR. Density decreased with increasing glass up to 20% after which it increased. Curing days increased the compressive strength of the blocks. Dry density was not affected by the type of treatment; however, samples cured for 14 days exhibited higher densities. Water absorption was also not affected by the type of curing, but 28 day-curing resulted in a higher value. Mixed PET-glass proportions showed that compressive strength, density, and water absorption decreased at an increased volume of aggregates. Three of the strongest blocks are T2 (10% PET-10% glass), T3 (20% PET), and T6 (30% PET). All blocks have superior qualities than those of commercial.

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