Author(s) :

Onchiri, R.O., Sabuni, B.W 2., Tsado, T.Y., Mwangi, D.K..

Volume/Issue :

Abstract :

This paper presents the research findings on use of molten plastics as a binder in making building blocks. Laboratory experimental analysis method was adopted for the research study. Sample blocks were made from molten plastics and quarry dust in different proportions. The mixture was subjected to pressure so as to achieve reasonable compaction. The mix propor-tions were 15:85, 20:80, 30:70, 40:60 50:50, 60:40, and 70:30 of plastic to quarry dust. Laboratory tests carried out included compressive strength, density and water absorption. Results showed an increase in strength as the proportion of the molten plastics increased to an optimum value of 10.47N/mm2 at 40% of molten plastic contents, which is higher than the cement-quarry dust. The strengths were comparable to that of designed block strength made from quarry dust and cement in the ratio of 1:6 and 2:4 with water-cement ratio of 0.5, which gave 4.00N/mm2 and 1.72N/mm2. The water absorption decreased with increase in plastic content. Values of water absorption capacities obtained from of all the blocks were between 0.22% -7.60% which are below the standard maximum value of 12%. This implies that the volume of fine content is appropriate and the desired strength of the block can be achieved. From the forgoing, it can be con-cluded that molten plastics is an effective alternative binder in the construction industry, thus managing solid waste.

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