本研究將採用廢輪胎經熱裂解後所生成之環保碳黑，應用於製作水泥質營建材料，將其製成具高抗壓強度與低透水比之廢輪胎環保碳黑水泥質膠結材或砂漿，藉由流度、抗壓強度與透水試驗等一系列量測結果，篩選合宜膠結材與砂漿之配比設計，再將其與預成形泡沫混拌後製成泡沫材料。經流度與抗壓強度試驗結果發現，膠結材配比設計於水灰比0.3與環保碳黑添加量2%時，所製成漿體黏稠度適中且具高抗壓強度。至於砂漿方面，當水灰比0.45與重量比2之細砂量，以及環保碳黑添加量1%時，所製成漿體具適當流動性且細砂含量適中，可降低製作泡沫材料過程中之消泡現象。膠結材與砂漿之透水試驗結果顯示，隨環拓環保碳黑添加量增加，試驗結果越趨於離散，其原因可能為無法控制環保碳黑於試體中均勻分布，一旦於試體內部形成一透水路徑，將導致試體透水量大幅增加。由鹼激發無機聚合膠結材之試驗結果發現，當鹼活化劑中之鹼當量AE%高達18%時，所製成試體之抗壓強度，仍遠低於具備結構工程應用價值之最低抗壓強度18MPa，因此，環拓環保碳黑不適合應用於製作成泡沫鹼激發無機聚合膠結材。將合宜之膠結材與砂漿配比設計，依據不同設計相對密度0.4至0.8，加入不同比例之預成形泡沫製成泡沫材料，藉由一系列試驗結果發現，泡沫材料內部之空氣含量多寡，將大幅影響其工程性質，泡沫材料試體之抗壓強度隨設計密度降低而下降，但其吸水率隨空氣含量增加而上升。

Environment-friendly carbon black powders containing 7.9% SiO2 are produced by the Enrestec company using a thermal cracking technique from waste tires. In the study, eco-carbon black powders can be first mixed with alkaline activating solution and then alkali-activated to produce inorganic polymers. The compressive strengths of the resulting inorganic polymers, however, are too low to be regarded as construction materials even the equivalent alkaline content in the alkaline activating solution is 18%. At the same time, the eco-carbon black powders are used as raw materials in the production of cementitious binders and mortars with good workability, high compressive strength and low water penetration. Furthermore, the feasibility for the reuse of eco-carbon black as a partial replacement of Portland cement is evaluated by conducting a series of tests on specimens with the introduction of different dosage of eco-carbon black. Once the cementitious binders and mortars with any optimal design of mixture to satisfy the required fresh and hardened properties, they are mixed with various amounts of pre-formed air bubbles to produce foamed specimens with different relative densities. The lightweight foams can be employed in the application of noise absorption and thermal insulation. Based on the experimental results, it is found that the optimal fraction of eco-carbon black introduced in making cementitious binders is 2% of cement weight. When the water/cement ratio is 0.3, the compressive strength of the resulting cementitious binder can reach up to 67.2MPa. To make mortar, the optimal percentage of eco-carbon black is reduced to 1%. When the w/c ratio is increased to 0.45 and the ratio of fine aggregate to cement is 2, the compressive strength of the resulting mortar can reach 64.6MPa. The measurements from viscometer tests indicate that the cementitious binder and mortar with a moderate viscosity are suitable for producing foamed specimens with various relative densities. By conducting a series of compressive strength and water absorption tests, it is verified that the relative density of foamed specimens plays a significant role in determining their physical properties. As the relative density ranging from 0.4 to 0.5 is decreased, the compressive strength declines rapidly but the water absorption increase significantly.

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