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題名 | 二氧化碳噴壓法研製臺灣杉/竹炭粒片水泥板=Manufacturing of Taiwania-Bamboo Charcoal Cement-bonded Particleboard by Carbon Dioxide Ejection Process |
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作者姓名(中文) | 尹華文; 藍皓繁; 林德財; 湯適謙; 鄒哲宗; | 書刊名 | 林產工業 |
卷期 | 24:4 民94.12 |
頁次 | 頁301-312 |
分類號 | 474.5 |
關鍵詞 | 疏伐木; 竹炭; 二氧化碳噴壓法; 水合溫度; 電磁波遮蔽性; Thinned wood; Bamboo charcoal; Carbon dioxide ejection method; Hydration temperature; Electromagnetic shielding properties; |
語文 | 中文(Chinese) |
中文摘要 | 本研究係利用疏伐的臺灣杉和竹炭為材料,以二氧化碳噴壓法快速製成粒片水泥板,並探討製板條件對各板之水合溫度、物理、強度性質,以及電磁波遮蔽性質之影響。結果顯示:板坏的水合溫度隨著水泥/材料質量比及二氧化碳壓力之增加而上升,並依竹炭含量及水灰比的增加而下降,當水灰比增至0.50時,溫度則劇降,且達最高溫的時間亦明顯延後;同時重量增加率亦減少,顯示過量的水分,會抑制二氧化碳與板坏中水泥之反應。因此,利用水合溫度曲線和重量增加率,決定製板條件之適當範圍,則可在4-6 min快速製成尺寸安定性良好的粒片水泥板。各板之靜曲破壞強度為24.42-43.15 kgf/cm²。經比較三項製板參數,以臺灣杉/竹炭比最為重要,其次為水泥/材料質量比,製板時間的影響較小。各板之電磁波介入衰減值隨竹炭量及板厚之增加而降低,而反射衰減值則呈增加之趨勢,故竹炭之添加有助於增強板材之電磁遮蔽性。 |
英文摘要 | This study used thinned Taiwania (Taiwania cryptomerioides) wood and bamboo charcoal to prepare cement-bonded particleboard by rapid CO² injection method. The effects of board forming conditions on the hydration temperature, physical, and strength properties of the board were investigated. Electromagnetic shielding characteristics of the boards, in particular, were compared. The results show that the hydration temperature of the mat increased with cement/material ratio and increasing carbon dioxide pressure. It also decreased with increasing bamboo charcoal content and the water/cement ratio. Hydration temperature showed dramatic decrease when water/cement ratio reached 0.50, the time to reach the highest temperature was notably prolonged, and the percentage of weight gain decreased. These showed that over water can inhibit the reaction between carbon dioxide and cement in the mat. Therefore, when we used hydration temperature curve and percentage of weight gains to determine the suitable manufacturing conditions, dimensionally stable boards could be formed in 4 min. Modulus of rupture (MOR) of the boards ranged between 24.42 and 43.15 kgf/cm², When manufacturing variables were compared, the ratio of Taiwania to bamboo charcoal was the most important; it was followed by the cement/material ratio, and the manufacturing time had the least effect. The inserted electromagnetic loss value of the boards decreased with bamboo charcoal content and board thickness; while the reflective loss value showed an increasing tendency opposite that of the insert loss value. Therefore, we deemed that adding bamboo charcoal can enhance electromagnetic shielding characteristics of the boards. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。