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11 NACE INTERNATIONAL: VOL. 56, NO. 11 MATERIALS PERFORMANCE NOVEMBER 2017 THE BLOG NACE International is introducing a new way to communicate with your peers by consolidating existing member platforms into one , easy-to-use Online Communit y. Tailor your experience by choosing the g roups that meet your needs , control when you receive notif ications or updates , and ask advice and g ive feedback to peers within your indus- tr y or area of interest . The new NACE International communities are open to members now, f rom the Resources link at www.nace .org. The following questions and answers are pulled f rom the previous list ser ver archive and f rom the new Online Communit y. Please be advised that the items are not peer-reviewed , and opinions and sug gestions are entirely those of the inquirers and respondents . NACE does not g uarantee the accuracy of the techni- cal solutions discussed . M P welcomes additional comments to these items . They may be edited for clarit y. Preparation of Deep Anode Groundbed Q: After drilling a deep groundbed and putting in the anodes, the next step is to f ill the active area with carbonaceous coke. The ty pe of coke that I am concerned about is granular coke. Should I pour this coke directly into the hole or f irst mix it with water? A lso, how should I increase the contact of the anode with the granular coke? Should I add water after loading the coke? Does adding water cause a gas trap? A: ere are a number of ways to do it. If your hole was drilled with a rotary mud drilling rig, it will be full of water and drilling fluid and the coke breeze may or may not freefall to the bottom, depending on the viscosity of the fluid. e viscosity depends on whether or not your driller "thinned " the fluid before loading the anodes. Some people use powdered coke breeze mixed with water to fluidize it. en they pump it from the bottom of the hole upward using a tremie pipe. is method will sometimes take a day for the coke to fully settle and compact around the anodes. Be sure to withdraw the tremie pipe as you pump or Continued on page 13 else it will get locked in under the weight of the coke. If it is a dry hole, top-loading is possi- ble, but you must be careful that the coke doesn't " bridge" from loading it too rapidly, or from large angular coke breeze. Granular coke f lows best. Monitor your anode-to-earth resistance during the loading process. When you see a signif i- cant drop in resistance, you can assume that particular anode is covered.