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[求助]
請(qǐng)教一下各位同行們，水泥凈漿和砂漿的電阻率如何測(cè)定？有哪些好的方法？
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一篇文獻(xiàn)中的測(cè)試方法如下：[1] Wen S, Chung DDL. Double percolation in the electrical conduction in carbon fiber reinforced cement-based materials. Carbon. 2007 45(2):263-7 DC electrical resistivity measurement is conducted by using the four- probe method, with electrical contacts in the form of silver paint in con- junction with copper wire. Each electrical contact is applied around the whole perimeter of the specimen in a plane that is perpendicular to the length of the specimen, which is the direction of resistance measurement. The outer two contacts (120 mm apart) are for passing current. The inner two contacts (80 mm apart) are for voltage measurement. A multimeter (Model 2002, Keithley Inc., Cleveland, OH) is used for the resistance mea- surement. Three specimens of each composition are tested. 小弟頭一次接觸混凝土，請(qǐng)教一下各位同行們，這種方法如何做？有更好的辦法嗎？ |
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