下水污泥以碳酸鈉為助熔劑燒製輕質骨材之特性研究

The Characteristics of Lightweight Aggregates Synthesized from Sewage Sludge with Flux of Na(subscript 2)CO(subscript 3)

胡紹華(Shao-Hua Hu) ； 胡慎知(Shen-Chih Hu) ； 傅彥培(Yen-Pei Fu)

《臺灣鑛業》 63卷4期 (2011/12) Pp. 19-27

https://doi.org/10.30014/TMI.201112.0004

摘要

In Taiwan, the major gravel source is from river and the gravel will be exhausted by over-extraction. In order to repress the exploration of nature aggregates, artificial aggregates are synthesized from industrial waste such as sewage sludge and reservoir sludge. In this study, lightweight aggregates were synthesized from sewage sludge by low temperature co-melting technology and Na(subscript 2)CO(subscript 3) was added as flux. Water adsorption, apparent porosity, bulk density, compressive strength, soundness loss and ignition loss of aggregates were tested. The adequate dosage of Na(subscript 2)CO(subscript 3) was 16wt% of sludge, and the aggregates of higher compressive strength were sintered at 400℃ for 0.5h and 900℃ for 1h. The results of tests mentioned above were 1.36%, 1.7%, 1.26g/cm3, 27.7MPa, and soundness loss and ignition loss were less than 0.1% and 0.64%. As a result, lightweight aggregates were synthesized from sewage sludge and Na2CO3 was added as a flux to lower the sintering temperature to 900℃. The soundness loss and ignition loss of the aggregates were lower than regulative standards and met the requirement of constructionmaterial.

關鍵字

下水污泥 ； 輕質骨材 ； Na2CO3

並列摘要

In Taiwan, the major gravel source is from river and the gravel will be exhausted by over-extraction. In order to repress the exploration of nature aggregates, artificial aggregates are synthesized from industrial waste such as sewage sludge and reservoir sludge. In this study, lightweight aggregates were synthesized from sewage sludge by low temperature co-melting technology and Na(subscript 2)CO(subscript 3) was added as flux. Water adsorption, apparent porosity, bulk density, compressive strength, soundness loss and ignition loss of aggregates were tested. The adequate dosage of Na(subscript 2)CO(subscript 3) was 16wt% of sludge, and the aggregates of higher compressive strength were sintered at 400℃ for 0.5h and 900℃ for 1h. The results of tests mentioned above were 1.36%, 1.7%, 1.26g/cm3, 27.7MPa, and soundness loss and ignition loss were less than 0.1% and 0.64%. As a result, lightweight aggregates were synthesized from sewage sludge and Na2CO3 was added as a flux to lower the sintering temperature to 900℃. The soundness loss and ignition loss of the aggregates were lower than regulative standards and met the requirement of constructionmaterial.

並列關鍵字

sewage sludge ； lightweight aggregate ； Na2CO3