Carbon Fiber-Based Cementitious Composites for Traffic Detection and Weighing In Motion

Abstract

 Highways may smart to traffic detection by use of self-sensing materials.  Cementitious sensors with sensitive property to weigh in motion.  Applied traffic load changes the electrical resistivity of sensors through passing.New self-sensing cementitious composites embedded in the highway pavement for vehicle detection and weigh during motion is fabricated. Smart carbon fiber (CF) reinforced cement-based materials with high sensitive property are used as sensors. These smart composites may be able to detect the traffic and sense the weight in motion, thanks to their piezoresistive property. Cement-based sensors capability to vehicle detection was investigated in a real field at the University of Technology campus. Findings clarify that the CF-Based cementitious composites provide have a great potential to use as sensors for detect traffic and its composition also it possibly identifies different vehicular axle loadings (weigh during motion).

A Novel Way of Using Ground Granulated Blast Furnace Slag and Steel Shaving Fibers for Production of Sustainable and Smart Rigid Pavement

“…According to this setup, it Piezoresistive behavior of cubic specimens with different percentages of steel shavings under uniaxial compression load with load application perpendicularly to the ER measurement was noted that the mixture containing 0.7 vol.% steel shaving reached to FVER of 2.5%, performed better than other mixtures in spite of the low percentage of fiber used in it. The high FVER obtained in this mixture under the uniaxial compression loads may be attributed to the well dispersed process of the steel shaving fiber that leads to the creation of a good electrical network within the concrete matrix that highly can self-sense the applied load on it (10,17,44,45).…”

“…In essence, the rising of FVER with the progression of the flexural load application is due to the fracture induces the dispersion of concrete particles, resulting in the formation of wider gaps or voids between them. The expanded gaps impede the movement of electrons, resulting in a rise in the electrical resistivity even when the material is experiencing failure (44,(48)(49)(50)(51).…”

Electro-mechanical Properties of Functional Fiber-Based Rigid Pavement under Various Loads Applied on a Large-Scale in-Situ Section

“…The research incorporated two types of conductive fibers: Chopped Carbon Fibers (CCF12) measuring 12mm in length, with a density of 1.7 g/cm³, a tensile strength of 4200 MPa, and elastic modulus of 240 GPa, as well as Macro End Hook Steel Fibers (SF) with lengths of 30 and 50 mm, a density of 7.8 g/cm³, the tensile strength of 2850 MPa, and elastic modulus of 200 GPa. The selection of electrode size and characteristics was determined from previous research [6,12], resulting in an electrode made of 70% copper and 30% zinc. The electrodes measure 1mm in width, with a thickness of 1 mm and different lengths depending on their locations within the pavement section.…”