英文摘要
|
Reusing MSWI fly ash to make high-pressure concrete products has been studied. Fly ash, slag and cement were used as cementing materials. Recycled glass and brick tiles were used as aggregates. All of them were mixed using various ratios to make concrete products. In addition to investigating the mechanical properties and behavior of concrete products, other properties such as the resistance of seawater resistance and the resistance of acid resistance were also discussed in-depth. Also, according to EPA regulations, in order to be used in a factory, all the products made by the fly ash must pass the dissolution test to prove the products have little heavy metal dissolution from the products. Therefore, the effect that the extraction of heavy metals from MSWI fly ash concrete products has on the environment is therefore also evaluated. The results show that the strengths of compression increase with the age of the high- pressure concrete products. Using a high proportion of coarse glass sand is especially effective in helping to increase the compressive strength. For the residual compressive strength, B2 is the best one on the seawater resistance and B3 is the best one on the acid resistance. Therefore, higher compressive strength will help anti-etching. Also the TCLP analysis shows that leaching of heavy metals is in compliance with the prevailing "Hazardous Industrial Waste Standards" of the specification. Therefore, the above results of this study suggest that there is high possibility to reuse MSWI fly ash into making better high-pressure concrete products.
|