廢輪胎橡膠骨材混凝土研究

Research on the Use of Waste Tire Rubber as Aggregate in Concrete

蘇俊源(Jun-Yuan Su)

指導教授 ： 吳崇豪

共同指導教授 ： 張高豪(Gao-Hao Zhang)

中原大學/工學院/土木工程研究所/碩士(2021年)

https://doi.org/10.6840/cycu202100747

摘要

廢輪胎橡膠的處理已成為世界各國重要的難題，將廢輪胎橡膠添加於混凝土取代部分天然骨材是大量消耗廢輪胎的可行方式之一，因此本研究使用廢輪胎橡膠分別取代天然粗細骨材（體積的0%、5%、15%）產製混凝土進行研究，並添加爐石粉於橡膠骨材混凝土探討其抗壓強度的變化，以期橡膠混凝土具有中低強度（f'c = 210kgfcm2和140kgf/cm2）混凝土之應用價值。
研究結果顯示，新拌混凝土的坍度及單位重隨橡膠骨材添加量的增加而減少，且橡膠粗骨材混凝土之坍度和單位重有低於橡膠細骨材混凝土；在添加相同粒徑的橡膠骨材混凝土，水膠比0.83者，其強度低於水膠比0.65者，且隨著橡膠骨材添加量的增加而降低，而橡膠細骨材混凝土的抗壓強度高於橡膠粗骨材者，混凝土的抗彎強度試驗結果則與抗壓強度相似；惟混凝土的波速隨橡膠骨材添加量的增加而降低，不過大部分混凝土的超音波波速在3500m/s以上，屬於混凝土品質較佳的範圍；28天齡期時，含30%爐石粉之混凝土抗壓強度可有所提升，含60%爐石粉之混凝土抗壓強度均降低，其中大部分添加5%橡膠骨材及含有30%爐石粉之混凝土抗壓強度可高於純水泥混凝土者；混凝土抗氯離子滲透能力隨橡膠細骨材的取代量增加而提升，不過整體橡膠細骨材混凝土抗滲透能力仍屬高滲透性。

關鍵字

廢輪胎橡膠 ； 混凝土 ； 力學性質

並列摘要

The re-use of waste tire rubber is an important issue for all countries in the world. Adding waste tire rubber in concrete for partly replacing natural aggregate is one of feasible ways to consume a large amount of waste tires. The study used waste tire rubber to replace the natural coarse and fine aggregates (0%, 5%, 15% of volume), respectively, for casting concretes and investigated their properties. The blast furnace slag was also added in rubber aggregate concrete to improve its compressive strength, which meet the requirement of low and medium strength concretes (f'c = 140kgf/cm2 and 210kgf/cm2).
The test results show that the slump and unit weight of fresh concrete decrease with the increase of rubber aggregate, and the slump and unit weight of rubber coarse aggregate concrete are lower than those of rubber fine aggregate concrete. The compressive strength of rubber aggregate concretes with the w/b ratio of 0.83 are lower than those of the concretes with w/b ratio of 0.65, and the strength decreases with the increase of rubber aggregate. The compressive strength of rubber fine aggregate concrete is higher than that of rubber coarse aggregate concrete. The bending strength test result of concretes are similar to that of compressive strength test. The ultrasonic pulse velocity of most concretes are over 3500m/s at 28-day, which indicates the quality of rubber aggregate concrete is better, however, the velocity decreases with the increase of rubber aggregate. At 28-day, the compressive strength of concrete containing 30% blast furnace slag increases while the concrete containing 60% blast furnace slag decreases. Most concretes with 5% rubber aggregate and 30% blast furnace slag presents higher compressive strength than that of the reference concrete. The resistance of concrete to chloride-ion penetration enhance with the increase of rubber fine aggregate, however, the resistance of rubber fine aggregate concrete to chloride-ion penetration is still classified as high permeability.

並列關鍵字

Waste Tire Rubber ； Concrete ； Mechanical Property

參考文獻

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