本研究混合水、氫氧化鈉及矽酸鈉溶液作為爐石粉鹼性激發劑製成無機聚合物，在固定水玻璃模數條件下，改變激發劑用量、水固比及低溫養護條件，探討無機聚合物漿體新拌及硬固工程性質與砂漿硬固性質，並利用掃描式電子顯微鏡觀察漿體微觀結構變化。
研究結果顯示：(1)無機聚合物工作性除隨水固比增加而提高外，亦與鹼激發劑濃度有關。當水固比為0.33時，鹼激發劑濃度由3%提高至5%時，流度值由106.3%增加至116.3%，若濃度提高至7%，流度值則降低至49.5%。(2)隨著鹼激發劑濃度增加，漿體初凝及終凝時間可分別降低至29分鐘及46分鐘。(3)無機聚合物漿體聚合熱溫度較一般卜作蘭水泥漿體水化熱高，當鹼激發濃度提高至7%，水化熱可達101 oC，但於15 oC低溫養護時，可將水化熱低降低約30 oC，工程性質亦略微提升。(4) 抗壓強度、動態彈性模數以及剪力模數與超音波波速會隨水固比降低而提升。(5)無機聚合物乾縮量隨鹼激發濃度提升而增加，隨養護溫度降低而增加。(6) 於相同水固比時，提升鹼激發量濃度及降低環境養護溫度可分別降低約4.7~5.3 %及約4.3~6.5 %熱傳導係數。(7) 掃描式電子顯微鏡檢測無機聚合物漿體結果發現：漿體結構外觀隨著養護環境溫度降低而趨近平整且更緻密。(8)無機聚合物應養護於70%以上濕度環境，以使工程性質及耐久性有較佳發展。

This research used s the mixture of water, sodium hydroxide and sodium silicate as the alkali activator to produce the granulated blast furnace slag based geopolymer. Under the condition of fixed modulus of sodium silicate, various dosages of activator, water-solid ratios and low temperatures for curing were used to investigate the engineering properties of geopolymer paste at the fresh state, and geopolymer paste and mortar at the hardened state. In addition, the variations of paste microstructures were examined by the Scanning Electron Microscopy.
The research results show that:
(1) The flowability of geopolymer can be enhanced by increasing the concentration of alkali activator and water to solid ratio. At a fixed water to solid ratio of 0.33, the flowability of paste increases from 106.3 % to 116.3 % when the concentration of alkali activator increases from 3 % to 5 %, but reduces to 49.5% when the concentration increases to 7%.
(2) With the increase of concentration of alkali activator, both the initial and final setting times can decrease to 29 and 46 minutes, respectively.
(3)The polymerization temperature of geopolymer paster is higher than the hydration temperature of ordinary Portland cement paste. When the concentration of alkali activator increases to 7 %, then the heat of hydration temperature increases up to 101 oC. But when curint with a low temperature of15 oC, the heat of hydration temperature can be reduce by about 30 oC and the engineering properties can be enhance slightly.
(4) The compressive strength, dynamic elastic modulus, shear modulus and ultrasonic pulse velocity will increase with the decrease of the water to solid ratio.
(5) The drying shrinkage increases with the increased concentration of alkali activator and the decrease of the curing temperature.
(6) Under same water-solid ratio, both the increase of the concentration of of alkali activators and reduction of curing temperature tend to reduce the thermal conductivity by 4.7~5.3% and 4.3~6.5%, respectively.
(7) The result of SEM indicates that the surface microstructure of geopolymer paste becomes smoother and denser once thethe curing temperature decreases.
(8) The engineering properties and durability will have a better development when the curing humidity is larger than 70%RH.

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