高爐石高韌性纖維混凝土（ECC）之開發與自癒合研究

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Title:	高爐石高韌性纖維混凝土（ECC）之開發與自癒合研究
Authors:	洪暄惠;Hung,Hsuan-Hui
Contributors:	土木工程學系
Keywords:	高韌性纖維混凝土;自癒合;ECC;self-healing
Date:	2016-08-30
Issue Date:	2016-10-13 12:14:59 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究探討高爐石粉之含量對於高韌性纖維混凝土（Engineered Cementitious Composites，ECC）力學性質之影響，包括壓力、拉力及撓曲性質。結果顯示，使用高爐石粉取代飛灰能提高 ECC 的抗壓強度，且依然能保有應變硬化與多重開裂的特性，於齡期 28 天時，抗壓強度可達 75MPa，最大拉應變均能超過 1%。將高爐石粉含量提高，抗壓強度、最大拉應力與極限撓曲應力會有些微下降的趨勢，但仍高於使用飛灰的 ECC。　　最後，探討高爐石 ECC 之自癒合能力，以拉力試驗、表面裂縫寬度觀測及掃描式電子顯微鏡（Scanning Electron Microscope，SEM）觀察並比較受到不同程度之破壞（預拉應變 0.5%及 1.0%）後，置入三種環境中（自來水環境、硫酸鹽環境及人工海水環境）28 天的自癒合程度。結果顯示，不論於自來水環境或是惡劣環境下之試體均有自癒合行為發生。;The objectives of this research discussed the influence on mechanical properties of Engineered Cementitious Composites (ECC) using slag. Including pressure, tensile and flexural properties. The results show that using slag can improve the ECC compressive strength, and retain characteristic of strain hardening and multiple cracking. Age of 28 days, the compressive strength is up to 75MPa, the maximum tensile strain can exceed 1%. When slag content increased, compressive strength, maximum tensile stress and ultimate flexural stress will be slight decline, but still higher than fly ash ECC. Finally, the investigation into the self-healing capacities of ECC specimens. In tensile test, surface crack width observation and scanning electron microscope (SEM) to observe and compare the degree of selfhealing with two different degrees of pre-crack (0.5% and 1.0%) and three different storage environments (water, sulfate solution and substitute ocean water). The results show, specimens has self-healing behavior regardless of storage in the water or under the harsh environment.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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