美国科学家发现 ,在混凝土中加入碳纤维后其电阻会随外加应力等的变化而成比例改变。科学家们指出 ,利用这一特性制成的智能混凝土有传感器功能 ,在道路和桥梁等建筑领域将具有广泛应用前景。研究表明 ,在混凝土中加短碳纤维只需占混凝土总体积的０.２ %和０ .５ %,混凝土电阻 American scientists found that the resistance of carbon fiber reinforced concrete will change proportionally with the change of external stress. Scientists point out that the intelligent concrete made by using this feature has the function of sensor and will have broad application prospect in the field of buildings such as roads and bridges. Research shows that adding short carbon fibers in concrete only accounts for 0.2% and 0.5% of the total volume of concrete, concrete resistance