本研究應用高壓蒸氣技術，探討淨水污泥與漿紙污泥灰共同製備為抗菌輕質化材料之可行性，其中試驗條件分別包括控制蒸氣壓力0.9MPa、反應時間8小時，控制鈣矽比(0.33~1.51)及調濕養護(室溫25℃及濕度70%)14天等條件，探討輕質化材料之機械特性。此外，為進一步探討輕質化材料摻混或表面塗佈二氧化鈦對抗菌特性之影響，本研究嘗試以嗜松青黴菌(Penicillium funiculosum)作為污染菌種，評估材料在模擬日夜光暗循環(日夜各12小時)及濕度條件(白天:65%及夜晚:75%)培養28天，材料表面之青黴菌覆蓋面積多寡，以作為抗菌效果之評估量化指標。 輕質化材料試驗結果顯示，在控制鈣矽比1.51及調濕養護之條件下，材料特性除符合輕質化材料之體密度(1.00g/cm3)及視孔隙率為(60.44%)之要求外，具有最佳之抗壓強度，材料之抗壓強度可達41kg/cm2以上，符合相關高壓蒸氣養護輕質氣泡混凝土之產品規範。製備材料之主要晶相為鈣矽水合物(C-S-H)以及碳酸鈣(Calcite)。抗菌試驗結果顯示，經過28天之試驗後，相較於未塗佈與摻混之試體，不論二氧化鈦之噴灑量之多寡，皆顯示出光催化之抗菌效果。輕質化材料表面之Penicillium funiculosum覆蓋率，以未塗佈試體之20.96%與內摻混之21.82%最高，而塗佈二氧化鈦0.1%試體，具有最佳的抗菌效果，青黴菌覆蓋面積僅約3.34%。本研究以漿紙污泥煅燒灰與淨水污泥製備輕質化材料，於表面塗佈二氧化鈦後，可透過光催化特性抑制青黴菌(Penicillium funiculosum)生長，且效果較未塗佈與摻混二氧化鈦試體佳。整體而言，應用高壓蒸氣技術製備之抗菌輕質化材料，極具後續應用發展潛力。 ;This study investigates the characterization of antibacterial lightweight material manufactured by water purification sludge and paper mill calcined ash by autoclaving technique with controlling conditions under steam pressure 0.9 MPa, reaction time 8 hr, Ca/Si ratio ranged from 0.33 to 1.51, humidity control and curing 14 days (room temperature: 25℃and humidity: 70%). This research also investigates the antibacterial materials properties evaluated by the Penicillium funiculosum with controlled day-night cycle (12 hr each), humidity control (day:65% and night:75%), and culturing 28 days. The coverage of Penicillium funiculosum on the surface of the lightweight material is widely used as a quantitative indicator for evaluating the performance of the antibacterial materials properties. In the case of Ca/Si ratio 1.51 and curing by humidity control, the experimental results indicated that the lightweight material has not only met the criteria of relevant autoclaving lightweight material with bulk density (1.00g/cm3) and apparent porosity (60.44%), but also has the good performance of compressive strength (higher than 41kg/cm2).The identified mainly crystal phases of the lightweight material are calcium silicon hydrate (C-S-H) and calcium carbonate (Calcite). According to the analysis results of 28 days antibacterial performance test, compared with the uncoated and titanium dioxide (TiO2) blended samples, the samples surface coating TiO2 has a good photocatalytic and antibacterial characteristics. In the case of uncoated and TiO2 blended samples, the coverage of Penicillium funiculosum on the surface of lightweight are 20.96% and 21.82%, respectively. The lightweight materials coating 0.1% TiO2 could perform the good antibacterial characteristics corresponding with lowest coverage of Penicillium funiculosum (approximately 3.34%). In this study, the prepared antibacterial lightweight materials could provide the good photocatalytic characteristics to inhibit the growth of Penicillium funiculosum. In summary, the prepared antibacterial lightweight materials have a good potential for applying the building and construction work in the future.
