Aluminum-plastic composite water

Aluminum stock solution of 2.5 g/1 was prepared by dissolving ACS grade aluminum wire in concentrated hydrochloric acid. Aliquots of the stock solution were added to 100 1 volumes of water to obtain the desired aluminum concentrations. The water was further acidified with 6N sulfuric acid to obtain the necessary pH levels aerated for at least two days before being placed in 76 1 plastic containers which delivered it through capillary and tygon tubing to 7.6 1 polyethylene test units. The turnover time of water in the units was approximately 24 hr. The test units were placed in a temperature controlled recirculating water bath which maintained temperature between 9.5 and 11°C. Daily samples of treatment water without added aluminum were composited for analysis of major cation and anions. The pH of two replicates from each treatment was recorded daily. 

For mix number 1, to determination the primal proportion of melamine plastic content in the composition. The concrete was composed of cement, sand, melamine, and plastic, adjusted to 1.0 1.0 1.0-3.0. The plastic proportion was increased in increments of 0.5. The water and aluminum powder were taken as 0.35 and 0.004 by weight of cement, respectively. 

For mix number 3, to determine the optimnm water content in the composition, the quantities of water were varied from 0.3 to 0.55 by an increment of 0.05 for each step. The proportions of other materials were kept constant. That is the composition of cement, aluminum powder, sand, and melamine plastic was adjnsted to 1.0 0.004 1.4 1.0. 

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