Abstract
Carbon fiber reinforced cement (CFRC), which mainly composed of hardened cement and short cut carbon fibers, possesses piezoresistive effect, and could be used to produce new type of compressive stress sensors. As having character of low cost, good compatibility with concrete and high durability, CFRC sensor extraordinary adapt to be used in the field of long time health monitoring of concrete structures. Based on large quantity of duplicate tests, the influence of temperature and humidity on electrical specific resistance of CFRC was studied. The function of volume content of carbon fiber or silica fume on above influence is also discussed. Results show that specific resistance of CFRC will decrease with increase of temperature or relative humidity, and above changing have no relationship with carbon fiber or silica fume volume content.
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