A Preliminary Research on Accelerated Test Method of Sulfate Attack Resistance of Concrete Based on Electrical Pulse

Abstract:

Some accelerated experimental methods are usually applied to measure the sulfate attack resistance of concrete due to very slow sulfate attack process in actual engineering. With taking account of characteristics of the accelerated methods in application and research of cement concrete nowadays, a new accelerated experimental method for assessment of the sulfate attack resistance is proposed based on electrical pulse. Corrosion resistant coefficient of concrete with different water/cement ratio, different soaked ways and fly ash replacement of cement were measured under the different corrosion condition. The mechanism of sulfate attack in the case of electrical pulse was tested using scanning electron microscope (SEM). The test results show that sulfate attack process of concrete was accelerated under the action of electrical pulse. Accelerated test menthod of sulfate attack resistence based on electrical pulse is feasible.

Key words:Sulfate attack resistance; Electrical pulse; Accelerated test method