Carbon fiber reinforced cement is a sensor base material, which can be used to realize the self - monitoring of concrete structures based on its piezoresistivity properties. The Material’s ability to sense an applied compressive load through a measureable change in resistivity. Full carbon fiber has a lot of smaller fiber parts. And when carbon fibers cut into small sizes tend to making group with similar materials, this is due because of electrostatic force usually called cohesion forces between carbon fibers. Cohesion forces between carbon fibers will make it difficult when carbon fiber is added to the cement. Dispersion of carbon fibers affected greatly the mechanical and electrical properties of the composites. Three type of surfactans, Carboxymethyl cellulose, super plasticizer and NaOH will use to help fiber dispersion using different concentration 0.4, 0.8, 1.2 and 1.6 / aquades % wt. and using magnetic stirrer in 350 rpm. UV-vis Spectrophotometry is used for dispersion characterization of carbon fiber suspense.

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