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Recycling of Industrial Solid Waste to produce cement units

Dr. Daad M. Daowd
Assistant Professor Mosul Technical College

Waste minimization approach has been seen as the only sustainable means of dealing with the waste problem. Life cycle assessment is a developing environmental management technique. At every stage of any industry there can be material, energy and labor input. At each stage there may be waste that is treated or untreated before disposal to the environment. Within the cycle, wastes and retired materials may be re-used, re-manufactured or further processed ( recycled) to minimize the net output.

Sugar beet fibers is a major fraction of solid waste produced from sugar industry, it is a residue remaining after the extraction of the juice. These natural fibers could be reused in concrete industry to produce fiber reinforced cement units ; it is made primarily of hydraulic cement, lime water , and discrete reinforcing fibers. The principal reason for incorporating fibers into a cement matrix is to increase the toughness , tensile strength , and improve the cracking deformation characteristics of the resultant composite.

The target of this research is to use the sugar solid waste industry (Beet fibers) to produce fiber reinforced concrete units after removing organic materials from it. Two types of mixes were used. Mix A is (1 cement part to 1.5 part of beet sugar by weight). While Mix B lime were used with cement as 1 part cement: 0.5 part hydrated lime 1.5 parts of beet fiber by weight. Calcium chloride were added as an accelerating factor while copper sulfate were used in the mix as antibiotic growth. The compressive strength of mix A cement units was 3.1 MP. At age of 28 days the modulus of rapture was 0.79 MP at the same age. While mix B results was 7.2 MP for compressive strength at age of 28 day and modulus of rapture was 7.4 MP at the same age. Then these units were exposed to natural climate condition ( cold, hot, rain ) for seven months with no change in properties. The other benefit of these units is light weight which means good thermal insulation. The dry density of mix A was 1850 Kg/m3 and for mix B was 1350 Kg/m3.


 

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