- 學位論文
廢棄電路板非金屬成分資源化於水泥混凝土之探討
Waste printed circuit board non-metallic composition resources in the cement concrete
摘要
本研究係以廢棄印刷之電路板非金屬粉料(WPCB粉)，進行相關資源化運用之研究，其資源化方向主要為在泡沫水泥砂漿及輕質粒料混凝土產品中，部分取代天然細粒料。 WPCB粉應用於泡沫水泥砂漿，其天然細粒料取代率若超過50%會對新拌性能產生影響，對硬固性能的影響則隨著WPCB粉取代率增加而下降，但在取代率達50%之後下降趨勢逐漸和緩。 WPCB粉應用於輕質粒料混凝土，在水灰比=0.6之條件下，其新拌性能在天然細料料取代率10%以內影響不大，若取代率超過10%則需要添加強塑劑，以改善工作性不佳的問題；強塑劑添加量至水泥粉體重量0.75% ，即可使輕質粒料混凝土接近控制組之工作性，但對於WPCB粉取代率30%以上之配比，即便添加強塑劑也無法改善工作性不佳的問題。 因添加WPCB粉對於泡沫水泥砂漿與輕質粒料混凝土之新拌工作性能會造成影響，故建議於泡沫水泥砂漿中之WPCB粉取代率不宜超過50%，而輕質粒料混凝土中則不宜超過25%。
並列摘要
In this study, (WPCB, which is short for) the non-metallic fractions of waste printed circuit board, is used as resource in related practices. The direction of the practices is focused on partial replacement of natural fine aggregates in the cellular mortar and the lightweight aggregate concrete products. WPCB in the use of cellular mortar, if the replacement ratio of natural fine aggregates is over 50%, the property of new mixture will be effected. However, the effect on the property of robustness eases whilst the replacement ratio increases. The decreasing trend gradually moderates until after the ratio reaches 50%. WPCB in the use of lightweight aggregate concrete, under the condition of water-cement ratio=0.6, the replacement ratio within 10% has no obvious effect on property of new mixture; however, if the replacement ratio rises over 10%, in order to improve the working performance, adding the superplasticizer is needed. As soon as the adding of superplasticizer reaches 0.75% of the weight of the concrete, the working performance of the lightweight aggregate concrete is close to the control group. To the composition of which the WPCB replacement ratio reaches above 30%, even the adding of superplasticizer does not help with improving the working performance. Because adding WPCB affects the property of new mixture of cellular mortar and lightweight aggregate concrete, it is recommended that the replacement ratio of WPCB do not rise above 50% for cellular mortar, and 25% for lightweight aggregate concrete.