dc.description.abstract | In Taiwan, most of the industrial sludge is used for landfill or dried as material resources, such as making bricks. However, due to the difficulty to get landfill sites and the decline of the bricks demand, it is getting more and more challenging to dispose the industrial sludge. Moreover, Chemical Sludge (CS) is difficult to be modelled and sintered alone; when sintered, the sample of Textile Sludge (TS) is easy to crak or over expand and then the strength would be weakened dramatically. However, because partially adding reservoir sediment (RS) to industrial sludge could offer the required cementation at room temperature and vitrification when sintering, but adding waste glass (WG) could promote dense and lower sintering temperature, the foresaid problems could be conquered. Thus, base on the data of physical and chemical analysis on raw materials, the following three topics were studied – “Optimum mixing proportion of sintered industrial sludge aggregates”, “Material properties and durability of industrial sludge aggregates”, and “ Influence of wasted glass to crack repair and densification of industrial sludge aggregate”. This study is to assess and develop the technology and application strategy in the industrial sludge aggregates.
The results showed that the optimum mixing proportion of sintered chemical sludge aggregates and sintered textile sludge aggregates were CS40RS60 and TS45RS55 respectively. In addition, it is recommended to adopt cold binding process for chemical sludge for better energy saving. When the usage of industrial sludge reached to 40%, the point failure loading of textile sludge aggregates was higher than that of chemical sludge aggregates by 46.7%. The chemical corrosion resistances of textile sludge aggregate (TS45RS55) was better than that of chemical sludge aggregate (CS40RS60). And the potential alkali-silica reactivities of both fell in the harmless zone. The pore volume with pore size larger than >10-6μm in chemical sludge aggregate (CS40RS60) and textile sludge aggregate (TS45RS55) took 98.98% and 100% of the total pore volume respectively. Then, the pore volume with pore size ranged between 300~1,000μm took 70.89% and 80.16% individually. Adding 20% of waste glass powder into industrial sludge would help sintered industrial aggregates in closing and reducing the cracks, and thus improve the hardness and strength of the aggregates significantly.
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