反覆載重作用造成之疲勞破壞，是目前國內外瀝青混凝土鋪面的主要破壞模式之一，單就目前國內柔性鋪面而言，重車超載情形相當嚴重，相形之下，增加鋪面再維修的機率與國家工程建設成本。以鋪面所受車輛載重而言是具間歇性，以溫度效應而言，瀝青混凝土材料特性極具感溫性，在這兩種因素交叉影響下，將使瀝青混凝土內部已存在的孔隙、微裂紋，及載重作用後所產生之疲勞裂縫漸漸閉合，可說是瀝青混凝土自我癒合的能力。
　　以間歇性荷重及溫度效應作為控制因子，評估經由疲勞破壞及癒合效應試驗所得之結果可知，較高溫時，瀝青混凝土較具流動性，因此最大鬆弛模數與25℃時之試驗值相較之下較低，但應力鬆弛時間較長。而刻槽深度者，承拉面積小因此內部抵抗力低，能量釋放快速，能量消散率J值及應力集中因子K值，隨刻槽深度及位移量的增加而增加。不同溫度下，疲勞破壞所產生之勁度損失皆有明顯的回復，癒合效應在低溫時較為顯著，破壞率在低溫時，勁度損失較為快速。

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