音射(Acoustic Emission, AE)是一種由於材料受到外界刺激後，其內部能量快速釋放而產生的一種暫態應力波的現象，當音射訊號產生時，即代表材料內部有損壞發生，而本研究採用的檢測方法即為非破壞性檢測中的音射檢測法(Acoustic Emission Testing, AET)。藉由音射裝置監測無添加自癒性材料之一般水泥砂漿與含有自癒性材料之水泥砂漿，在單軸抗壓試驗加載且分別受到其試體不同比例的抗壓強度作用下之加載過程，並由監測得到之數據結果利用參數分析法及小波轉換分析的波形圖，進行此兩種類型試體在不同比例強度加載作用後的破壞程度評估，以及經逐次加載及養護後之微裂縫自癒修復程度比較。
由本研究的試驗結果得知，將破壞產生之裂縫破壞型式藉由參數分析法作分類並得出破壞型式分布圖，當其分布點的分布趨勢隨著破壞程度的提升而往分布圖中右下的剪力裂縫破壞區移動，則表示有較嚴重的破壞發生。其次，由音射波形的變化情形可以發現，當有越嚴重的破壞發生時，其訊號波形中的S波的作用時間會明顯地增長。最後，藉由各加載及養護階段的破壞程度及自癒程度的評估結果與相關之量化參數作探討與比較，以達到偵測混凝土其微裂縫自修補特性的目的。

Acoustic emission is a phenomenon due to the material subjected to external stimulation and its internal energy generated by a rapid release of transient stress wave. When the acoustic emission signal generating, it represents the damage within materials occurred. The detection method used in this study is Acoustic Emission Testing (AET) and that is one of non-destructive methods. By using acoustic emission device monitoring the loading process of without and with self-healing material of cement mortar, which loading in different ratio of its respective compressive strength during the uniaxial compression testing. The results which are analyzed by parameter method and the waveforms of wavelet transform demonstrate the damage level in different loading strength and the degree of self-healing in different curing stage of these two types of cement mortar. The crack types which incurred by the damage are categorized different damage types as the scatter diagram by parameter method, and the distribution trend of points in the diagram move to shear crack zone when the damage level increases. Secondly, according to the changes of acoustic emission wave indicate that the reaction time of S wave of the waveform significantly grow when the severe damage occurs. Finally, make the discussion and comparison by the results of the assessment for the degree of damage and self-healing in each stage of loading and curing and related AE parameters in order to detect the characteristics of self-healing of the micro-cracks in concrete.

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