含低溫煆燒稻殼灰無機聚合物漿體之力學性質

MECHANICAL PROPERTIES OF GEOPOLYMER CONTAINING RICE HUSK ASH CALCINED AT LOW TEMPERATURE

姚廷穎(Ting-Ying Yao) ； 陳君弢(Chun-Tao Chen) ； 張鈞浩(Chun-Hao Chang) ； 陳姵華(Pei-Hua Chen)

《中國土木水利工程學刊》 32卷4期 (2020/06) Pp. 339-343

https://doi.org/10.6652/JoCICHE.202006_32(4).0004

摘要

無機聚合物的長期強度往往隨時間而降低，甚至因此而破壞。有鑑於此，本研究嘗試以添加稻殼灰的方式來改善爐石粉基無機聚合物的力學性質。試驗過程固定水固比0.6，改變氫氧化鈉與水玻璃用量。結果發現，在氫氧化鈉與水玻璃體積比5:5時，28天抗壓強度最高。接著以400°C煆燒稻殼所產生的稻殼灰部分體積取代爐石粉，結果發現取代率10%時，雖然早期強度較空白組低，但28天強度略高，甚至於91天時強度仍持續增加。取代率20%時，則無論28天或91天強度皆下降，因此適量使用稻殼灰製作無機聚合物可增加強度，並避免長期強度下降。

關鍵字

無機聚合物 ； 水淬高爐石粉 ； 稻殼灰 ； 抗壓強度

並列摘要

The geopolymer is a cementitious material with high early strength and corrosion resistance by the polymerized aluminosilicates. Researches in literature have found that the geopolymer has strength decreased with time and thus breaks apart. In view of this issue, this study tried to improve the mechanical properties of the slag-based geopolymer by the rice husk ash (RHA). During the study, the geopolymer was made by the ground-granulated blast-furnace slag (GGBS) and RHA calcined at 400 °C. The slag-based geopolymer was produced at the water-solid ratio was 0.6 and various volume ratios of sodium hydroxide (NaOH) to water glass (WG). Results showed that the mix with the ratio of 5:5 had the highest 28-day strength. The GGBS was then partially replaced by the RHA at various volume ratios. At volume ratio of 10%, the mix had a lower 28-day strength but higher 90-day strength than the plain. At 20%, both the 28-day and 91-day strengths were reduced. Therefore, adequate RHA addition during the production of geopolymer helps to increase and sustain the strength.

並列關鍵字

geopolymer ； slag ； rice husk ash ； compressive strength