稻穀灰作為卜作嵐材料之研究

The Study of Rice Husk Ash for Pozzolanic Material

謝素蘭(Su-Lan Hsieh) ； 陳清山(Ching-Shan Chen) ； 華根(Ken Hwa)

《桃園創新學報》 32期 (2012/12) Pp. 233-248

https://doi.org/10.6989/JTI.201212.0233

摘要

混凝土係由惰性固體粒料及膠結漿體組合而成之水泥基質複合材料，其中膠結漿體則由水、水泥及卜作嵐材料組成，而應用Fuller理想級配曲線設計水泥基質材料，係以粒料堆積為基本架構，設計過程中，首先應用理想級配曲線得到最大堆積緻密度，將涵蓋卜作嵐材料的固體粒料比率固定，續以所需潤滑包裹漿厚度求出水泥漿用量。因此當固體粒料達到物理緻密狀態時，影響混凝土材料工程性質的因素，除粗、細粒料來源外，參與堆積的固體粒料粒級及膠結料組成均對混凝土材料產生極大影響，本研究主要在探討稻殼灰作為卜作嵐材料對混凝土材料工程性質之影響。其中稻殼灰以臺灣水稻稻殼為基材，首先針對經燃燒後之稻殼灰進行物理化學特性分析，並設計不同膠結漿質與量之稻殼灰混凝土，分別量測其工作性、單位重等新拌性質，抗壓強度、水泥強度效益、超音波速、氯離子電滲量等硬固性質，結果顯示水泥強度效益將隨著稻穀灰的添加量增加而增加，氯離子電滲量則隨著膠結漿質濃度的增加而增加，因此若藉由稻穀灰添加而降低水泥用量，有助於降低氯離子電滲量，以提升混凝土耐久性。

關鍵字

稻穀灰 ； 混凝土 ； 膠結漿料 ； 卜作嵐材料 ； 工程性質

並列摘要

The concrete mixtures are both particulate composite materials in that they essentially consist of a single continuous phase, and a single discontinuous particulate phase. The composite of discontinuous particulate phase are water, cement and pozzolanic material. This paper mainly discussed the properties of concrete for different rice husk ash composite used Fuller's gradation curve. The Fuller's gradation curve is applied to enable fully packing with all solid particles. Then, the least void volume of paste can be obtained. Mixtures with concrete of different rice husk ash were designed. Such fresh properties as workability and unit weight were measured, while harded properties included compressive strength, the strength efficiency of cement, pulse velocity, electrical resistivity and chloride ion permeability were analysied. The effect of concrete on property used different rice husk ash composite. The results show as the rice husk ash is increased, the strength efficiency of cement can be increased and Chloride Penetration are increased from the volumetric concentration of cement are increased. So, if the rice husk ash is more, the cement is decreased, the durability is increased, such as electrical resistivity and chloride ion permeability.

並列關鍵字

Rice Husk Ash ； Concrete ； Cementitious material ； Pozzolanic material ； Property