鋪面施工過程中，瀝青種類、級配種類、天氣狀況、路基溫度、鋪築厚度、施工過程等皆影響材料的降溫速率。為避免鋪築時壓實度不足的情況發生，及造成開放交通之後對於鋪面之傷害，分析溫度與鋪面績效關係圖與不同條件對降溫速率影響，作為評估依據。
本研究分為現地試驗與實驗室試驗兩部份，現地試驗包含降溫觀測及環境條件記錄，實驗室試驗則進行不同溫度下材料工程性質試驗，找出中斷溫度與允許開放交通最高溫度。利用紀錄儀紀錄鋪面在不同孔隙率、鋪面厚度、環境溫度的鋪面降溫曲線，探討各因素對於鋪面降溫速率之影響，並建立鋪面降溫模式。
由實驗室試驗發現，鋪面溫度低於50℃時，間接張力值大幅增加，鋪面溫度50℃間接張力強度為80℃的2.7倍。孔隙率20%者降溫至中斷溫度所需時間為10%者的47%。鋪面厚度大於5cm小於10cm者，鋪築厚度每增加1cm平均有效滾壓時間增加13分鐘，平均允開放交通時間增加27分鐘。
由現地試驗發現，即使鋪面表面溫度已經降溫至50℃，在深度為2.5cm處溫度仍有62℃，因此若貿然開放交通將會導致鋪面形成車轍破壞。

Pavement cooling rate could be affected by many factors, such as mixture type, gradation, ambient temperature, layer thickness, base temperature and pavement construction. In an effort to provide adequate compaction and to prevent the damage due to open traffic, factors that affect the cooling rate of the mixture were studied.

Field and laboratory tests were conducted. In field, thermocouples were installed in paving lane to measure temperature change under different depths. The environment conditions were recorded. In lab, specimens were made using the same mix as constructed in field testing sites. Marshall stability, indirect tensile strength and resilient modulus of the specimens were obtained under different temperatures. Cessation temperature and the maximum temperature to open traffic were determined. Effects of air voids, thickness of specimen and ambient temperature on cooling rate were discussed. Based on the temperature data, a pavement cooling model was developed.

It is found that indirect tensile strength at 50C is 270% higher than that at 80C. The time required for the mix of 20% air voids to cool to 80C cessation temperature is 53% shorten than that for the mix of 10% air voids. If layer thickness is between 5 cm and 10 cm, time available for compaction and to open traffic increases 13 minutes and 27 minutes, respectively for one-centimeter increase in layer thickness. The results of the field tests indicate that even if pavement surface temperature is at 50C, the pavement temperature in the depth of 2.5 cm remains 62C. This suggests that pavement could be susceptible to rutting or shoving for open traffic with surface temperature at 50C.

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