目前營建業因濫採砂石導致來源短缺，又正逢近年來3D列印技術應用案例急遽增加，因此本研究嘗試將3D列印應用於鋪面工程上，主要方向係透過3D列印技術製作粒徑不同塑膠粒料代替部分天然粒料之瀝青混合物，塑膠粒料係根據天然粒料粒型作為參考進而設計出實心、空心與細塑膠粒料，瀝青部分採用改質III-C型瀝青作為黏結料，首先透過各成分比例觀念找出其配比設計且探討體積性質，後續進行瀝青混凝土試驗檢核是否符合規範，並透過AASHTO鋪面厚度設計進行初始建造成本比較與利用SWOT分析各優劣判斷其適用性；另對實心塑膠粒料混合物進行瀝青萃取，接續進行瀝青物性與流變試驗判斷塑膠熔融對於瀝青之影響。本研究試驗結果顯示實心塑膠粒料應用於鋪面工程可行性較高，因其單位重 (Gmb)、穩定值、CT-index與車轍輪跡試驗皆優於傳統瀝青混凝土，鋪面績效方面亦優於空心及細塑膠粒料混合物，而其缺點為初始建造成本較高，但本研究亦根據CT-index試驗結果可得知實心塑膠粒料可改善混合物抗張裂縫能力，因此3D列印應用於鋪面工程優勢可顯現於後續再生瀝青混凝土維修成本、改善其黏結力與耐久性彌補，而於瀝青萃取部分說明添加PLA (Polylactic Acid)可提高剛度與軟化點，降低針入度、恢復率與韌性，但總體來說黏結料需針對PLA熔融情況、SBS降級現象、離析情形與試驗方式作探討。

At present, the construction industry has a shortage of aggregate due to excavation activities. In recent years, 3D printing applied to construction industry is becoming an engineering technology. Therefore, this research attempts to apply 3D printing to pavement engineering. The primary objective is to use 3D printing technology to produce plastic aggregates with different particle sizes used for asphalt concrete. The plastic aggregates adopted in this research are based on the natural aggregates shape as a reference to design solid, hollow and fine plastic aggregate, respectively. In addition, polymer modified asphalt was utilized as a binder. First, the research found out the mix design of each material and discussed the volume properties through the concept of the proportion of each material. This research also conducted an asphalt concrete test to check whether it meets the specifications. Through the design of AASHTO pavement thickness and SWOT analysis, compared the initial construction cost to judge its applicability. In addition, asphalt extraction test was performed on the solid plastic aggregate mixture. It used asphalt physical properties and rheological tests to determine the impact of plastic melting on asphalt. The test results showed that the application of solid plastic aggregates to pavement engineering is more feasible because its unit weight (Gmb), stability value, CT-index and rutting wheel track tests are better than traditional asphalt concrete. The pavement performance of solid plastic aggregates mixtures was also better than pavement performance of hollow and fine plastic aggregate mixtures. Although the test results also showed that solid plastic aggregates can improve the tensile strength of the asphalt mixture, the price was too high. Therefore, the advantages of 3D printing applied to pavement engineering can be reflected in the subsequent maintenance cost of recycled asphalt concrete, improving adhesion and durability. In the asphalt extraction part, it is found that adding PLA (Polylactic Acid) can increase stiffness, softening point, reduce penetration, recovery rate and toughness. Generally, the asphalt needs to be discussed for the PLA melting situation, the SBS degradation phenomenon, the segregation situation and the test method.

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