本研究首先嘗試製作各種不同尺寸之中空球輕質骨材，以廢木屑、太白粉膠及阿公店水庫淤泥為原料，透過轉動造粒技術進行造粒，可獲得到不同尺寸的中空球生粒，再利用高溫爐及採用燒失法燒製不同尺寸之中空球輕質骨材。另外，量測中空球輕質骨材之各種工程性質，包括吸水率、殼層密度、體積變化、顆粒單位重、中空球點壓強度及中空球殼層微結構等，進而探討製作過程中燒結溫度及中空球尺寸對前述各工程性質之影響，其中有關中空球輕質骨材之點壓強度，將分析其與殼層密度及中空球尺寸之關係。最後，則以不同尺寸之中空球骨材製作輕質混凝土試體，並量測中空球輕質混凝土之單位重、抗壓強度及熱傳導係數。試驗結果顯示，中空球輕質混凝土之單位重與強度皆符合CNS規定，同時，添加中空球輕質骨材之混凝土，其熱傳導係數也有下降的現象。

In this study, raw materials for producing lightweight hollow spherical aggregates are composed of waste wood-dust, starch glue and sludge evacuated from the A-Kung-Tien reservoir in Kaohsiung. Lightweight hollow spherical aggregates with various diameters were manufactured by using the rotation technique for making spheres and the burning of wood dust under higher temperatures for weight loss. In addition, the engineering properties of lightweight hollow spherical aggregates with different sizes, including water absorption, shell density, particle density, point load strength and microstructure, were measured and then compared to each other. As a result, the effects of sintering temperature and sphere size on the engineering properties are evaluates. Especially, the dependences of point load strength on shell density and sphere size are discussed. Furthermore, concrete specimens were made from lightweight hollow spherical aggregates with three different diameters and then tested for their unit weight, compressive strength and thermal conductivity. Results indicated that the density and compressive strength of concrete specimens with lightweight hollow spherical aggregates satisfy the standard of CNS. Meanwhile, their coefficients of thermal conductivity are slightly reduced due to the introduction of lightweight hollow spherical aggregates.

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