本研究係採用廢棄混凝土再生粒料取代部份天然粗粒料拌製多孔隙瀝青混凝土，以探討廢棄混凝土再生粒料應用於低噪音鋪面之可行性。研究時採用改質瀝青III型及水泥瀝青膠漿等兩種黏結料拌製試體，並分二階段進行探討，第一階段探討含廢棄混凝土再生粒料多孔隙瀝青混凝土配比設計法；第二階段進行力學性質試驗、鋪面績效試驗、耐久性質及聲學特性等試驗。以探討廢棄混凝土再生粒料應用於低噪音鋪面之可行性。
研究結果顯示，本研究採用水泥瀝青膠漿做為黏結料不須高溫拌合，可有效減低空氣污染及能源消耗。就力學性質方面，馬歇爾穩定值及間接張力強度皆隨廢棄混凝土再生粒料含量增加而提升。就耐久性質及鋪面績效方面均符合多孔隙瀝青混凝土規範要求。就聲學特性而言，吸音效果與較大孔隙率及較大粒徑級配有正向關係；而廢棄混凝土再生粒料取代比例與吸音係數峯值之頻率呈反向關係，試體厚度亦與其吸音係數峯值之頻率呈反向關係；而孔隙性路面雙層化設計於上層及下層粒料粒徑相異且試體厚度維持不變時，吸音係數峯值頻率會隨上層材料孔隙率增加而逐漸往高頻位置移動。就整體而言，廢棄混凝土再生粒料應用於低噪音鋪面具有可行性。

The purpose of this study is to investigate the sound absorption properties of porous asphalt mixture with various replacement proportions of recycled concrete as coarse aggregate.Using polymer-modified asphalt and cement asphalt paste binder to mix specimens. The study is divided into two stages; Stage 1 discussion the mix design method of porous asphalt mixture with recycled concrete based on concept of particle packing. In stage 2, laboratory tests were preformed such as mechanical test, pavement performance test, durability test and acoustic property test to evaluate the feasibility of recycled concrete application in low noise pavement.
From the test results, in this study, asphalt cement paste to be binder does not need high-temperature mixing, can effectively reduce air pollution and energy consumption.In mechanic properties, Marshall stability, indirect tension strength and direct shear strength are increased with increase of furnace slag replacement content. Durability and pavement performance meet the requirement of the standards. In acoustic property, sound absorption characteristic is positively related to larger porosity and larger aggregate grading. In general, the thicker specimen is, the frequency of sound absorption coefficient is tending to lower. In the double layer design when the aggregates size in the upper and lower levels are different and the specimen thickness is the same, sound absorption peak value moves to high frequency position with increase of air voids in upper layer. Based on laboratory investigations presented in this study, the application of recycled concrete in low noise pavement is feasible.

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