本研究利用水庫淤泥粉末與木屑粉末製作出超輕質中空球輕質骨材，配合具有質輕，高強度的無機聚合物膠結材作為點接，希望能製作出具有基本使用強度超輕質無細混凝土。藉由調整A/C與W/C找出無細混凝土可成型範圍，改變中空球骨材粒徑，採用一般澆灌式與高壓震動兩種不同製程，觀察其無細混凝土之單位重、抗壓強度與熱傳導係數。
　　試驗結果顯示，利用一般澆灌式製程，製作出隔熱用超輕質粒料無細混凝土，各粒徑符合0.5MPa具最輕單位重之無細混凝土，當骨材粒徑為8mm時，無細混凝土最輕單位重為491 kg/m3， 抗壓強度為0.52MPa，熱傳導係數為0.18W/m•K。當骨材粒徑為11mm時，無細混凝土最輕單位重為377 kg/m3， 抗壓強度為0.51MPa，熱傳導係數為0.15W/m•K。當骨材粒徑為15mm時，無細混凝土最輕單位重為304 kg/m3， 抗壓強度為0.68MPa，熱傳導係數為0.15W/m•K。利用高壓震動製程製作隔熱用輕質粒料混凝土，符合規範抗壓強度下限3MPa，本次試驗最輕單位重為640 kg/m3，相對應抗壓強度為3.22MPa。最佳抗壓強度為6.92MPa，相對應單位重為825 kg/m3。

Reservoir sludge and wood dusts were first used to produce ultra-light hollow sphere aggregates. Further, the ultra-light hollow sphere aggregates were compactly packed and then bonded partially by a high-strength inorganic material to form a no-fines concrete. The engineering properties of the on-fines concrete including unit weight, strength and coefficient of thermal conductivity were affected by the ratio of aggregate to cement, the ratio of water to cement, the size of hollow sphere aggregate and the manufacturing method we used such as casting and high-pressure compaction. Experimental results on the no-fines concretes made by casting suggest that super-lightweight no-fines concretes are promising and can be used as thermal insulation in building construction. Under the requirement of compressive strength larger than 0.5 MPa, the engineering properties of no-fines concretes depend on the size of hollow sphere aggregates used. The lightest unit weight, compressive strength and coefficient of thermal conductivity of the no-fines concretes with an aggregate size of 8mm are 491kg/m3, 0.52MPa and 0.18W/m•K, respectively. At the same time, the lightest unit weight 377kg/m3, the compressive strength 0.51MPa and the coefficient of thermal conductivity 0.15 W/m•K are found when the aggregate size is 11mm while the lightest unit weight 304kg/m3, the compressive strength 0.68MPa and the coefficient of thermal conductivity 0.15 W/m•K are obtained when the aggregate size is 15mm. In addition, the lightest unit weight is 640 kg/m3 and the highest compressive strength is 6.92MPa when no-fines concretes are made by high-pressure compaction under the requirement of compressive strength larger than 3MPa.

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