美国布法罗市的一名材料学者ＤｗｂｒｏａｈＣｈｕｎ发现 ,当混凝土受挤压时可改变电导 ,于是她将碳纤维混合入混凝土中 ,以便于测量。实验表明 ,即使将自行车这样较轻的车辆放在这种混凝土上也可测出其重量。如果将这种混凝土用于高速公路 ,则可以检测高速路上行驶的车辆。例 Dwbroah Chun, a material scholar in Buffalo, USA, found that when the concrete was squeezed it changed conductance and she mixed the carbon fibers into the concrete for easy measurement. Experiments show that even a lighter vehicle such as a bicycle can weigh its weight on such concrete. If this type of concrete is used on a freeway, it is possible to detect a vehicle traveling on a highway. example