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All Journal Budapest International Research in Exact Sciences (BirEx Journal)
Rakotomamonjy P.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Physics Transportation

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Process for Making Self-Locking Pavements from Madagascar River Sand and Plastic Waste Rakotomamonjy L.; Rakotomamonjy P.; Razafindramanga A. W.; Rakotondramanana V. Henintsoa; Bakoarisoa Andrianina Cynthia; Ramahandry Jean Elidon; Koto-te-Nyiwa Ngbolua; Robijaona Rahelivololoniaina B.
Budapest International Research in Exact Sciences (BirEx) Journal Vol 5, No 1 (2023): Budapest International Research in Exact Sciences, January
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v5i1.7469

Abstract

This work focuses on the manufacture of self-locking pavement from a mixture of river sand and waste from the recovery of plastic film packaging of the cookie and confectionery JB and wastes plastic bags collected at the university campus of Vontovorona. The sand is sifted to select the appropriate granulometry, which is higher than 0.5 mm on the one hand, and that is lower than 0.5 mm on the other hand. The sand with a grain size greater than 0.5 mm is mixed with the plastic waste in accordance with the manufacturing dosage. Different proportions of sand/plastic waste ranging from 40/60 to 70/30 have been prepared. The absorption rate increases with the proportion of sand added. This is true for both types of plastic waste. This absorption rate is increased for the pavers with plastic bag waste as binders. For the latter, the lowest rate of 2.2 is close to the highest rate of 2.1 for paving stones with JB plastic packaging waste as binders. The obtained pavers have a good mechanical strength higher than 12,000 daN.
Design and Manufacture of a Mobile Electric Alembic for Naturally Occuring Essential Oils Extraction Ravelomanantsoa H.; Ranaivoson S.L.O.; Razafindrakoto F.N.R.; Letsara R.; Razafindramanga A.W.; Rakotomamonjy P.; Razafimahefa M.V.; Koto-Te-Nyiwa Jean-Paul Ngbolua; Randriana N.R.F.; Robijaona Rahelivololoniaina B.
Budapest International Research in Exact Sciences (BirEx) Journal Vol 5, No 2 (2023): Budapest International Research in Exact Sciences, April
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birex.v5i2.7548

Abstract

The present study concerns the design and manufacturing of a mobile electric alembic, for its use in the distillation of three essential oils (EOs). The design was based on thermodynamic and fluid mechanics calculations to establish the sizing of the device. The heating source used is electricity using electrical resistors.  Tests were carried out to verify the ability of the alembic to extract some essential oils (Eos) from aromatic plant, such as Cinnamomum camphora, Cymbopogon citratus, Corymbia citriodora. The EO yields obtained were comparable to those described in the AFNOR. The results of the Gas Chromatography analysis were similar to the published data.
Co-Authors Bakoarisoa Andrianina Cynthia Koto-Te-Nyiwa Jean-Paul Ngbolua Koto-te-Nyiwa Ngbolua Letsara R. Rakotomamonjy L. Rakotondramanana V. Henintsoa Ramahandry Jean Elidon Ranaivoson S.L.O. Randriana N.R.F. Ravelomanantsoa H. Razafimahefa M.V. Razafindrakoto F.N.R. Razafindramanga A. W. Razafindramanga A.W. Robijaona Rahelivololoniaina B.