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[求助]
请教一下各位同行们，水泥净浆和砂浆的电阻率如何测定？有哪些好的方法？
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一篇文献中的测试方法如下：[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. 小弟头一次接触混凝土，请教一下各位同行们，这种方法如何做？有更好的办法吗？ |
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