降阻剂又分为：防腐降阻剂，缓释降阻剂，石墨降阻剂，高能回填料，保湿剂。高效降阻剂主要成分有 Na 、 Ca 、 Fe 、 Mg 、 Ti 、 C 等元素，外观为黑褐色粉状物。不含有毒元素，对环境无污染。电阻率：小于 1.5Ωm 适用于土壤电阻率高、多雨、土壤易流失等地区;酸碱性：pH值大于7小于12;埋地时对低碳钢及镀锌钢的平均腐蚀率：小于 0.01mm /年;经实验估算，有效使用年限不低于 30—50年;比重：干粉状态时为1.28吨/立方米。
防腐降阻剂 地网设计中的重要参数之一就是岩土的土壤电阻率，此外，还要考虑开挖（钻进）难度、破碎还是整体岩石、持水能力等因数。 有的岩土电阻率高，但是在整体岩石之间常有较好的土壤间隙层，在这样的环境中，避开整体岩石，在间隙中开挖填灌降阻剂效果很好。阿坝卡吉岭通讯基站，土壤电阻率4500Ω.m，原联合地网接地电阻率68Ω，上述施工后接地电阻降为9.4Ω。
Power engineering special graphite reducer level high energy backfill specifications
Main technical indicators of resistance reducer:
The resistance reducing agent is further divided into: anti-corrosion reducing agent, slow release resistance reducing agent, graphite reducing agent, high energy back filler, moisturizing agent. The main components of the high-efficiency drag reducer are Na, Ca, Fe, Mg, Ti, C and other elements, and the appearance is dark brown powder. Contains no toxic elements and is environmentally friendly. Resistivity: less than 1.5Ωm Suitable for areas with high soil resistivity, heavy rain, easy soil loss, acidity and alkalinity: pH value is greater than 7 and less than 12; average corrosion rate of low carbon steel and galvanized steel when buried: less than 0.01 Mm / year; experimentally estimated, the effective life is not less than 30-50 years; specific gravity: 1.28 tons / cubic meter in dry powder state.
Long-lasting anti-corrosion and drag reducer performance:
The four technologies of graphite moisturizing formula, ion slow release, deep grounding and long-term resistance reduction solve the problems of resistance reduction, corrosion resistance and service life, making the grounding performance and The adaptability has obvious advantages and the application field is very broad. The graphite reducer contains materials with very good expansion, water absorption and ion permeability, and the moisture retention is achieved by the capillary principle. No matter how the weather or the surrounding environment changes, The surrounding soil is kept at a certain humidity to achieve a good conductive state, and the conductive range of the surrounding soil can be gradually expanded with the passage of time. The resistance reducing agent can reduce the construction workload, and the grounding body can be less, especially the available level. The grounding body replaces the vertical grounding body (in mountainous areas and rocky areas, etc.) that is difficult to construct. Convenient construction can solve the problem of limited construction site, can save a lot of metal materials, has long-term stability and stability, and has good anti-corrosion performance. Less affected by the climate. Comprehensive technical economy and so on. Applicable to different geological conditions, in the black soil, loess, saline-alkali soil, garbage soil, backfill soil, weathered sand, fine sand, clay, mountain, through the high-quality construction process can achieve a good grounding resistance reduction effect
Anti-corrosion and resistance-reducing agent One of the important parameters in the design of the ground network is the soil resistivity of the geotechnical soil. In addition, factors such as the difficulty of excavation (drilling), the fracture or the overall rock and water holding capacity are also considered. Some geotechnical resistivity is high, but there is often a good soil gap layer between the whole rocks. In such an environment, avoiding the whole rock, it is very effective to excavate and fill the drag reducer in the gap. Aba Kajiling communication base station, the soil resistivity is 4500 Ω.m, the original joint grounding grid grounding resistivity is 68 Ω, and the grounding resistance drop after the above construction is 9.4 Ω.
General requirements for antiseptic humectants
1) The pressure reducing agent is prepared by adding water according to the weight ratio of water: drag reducing agent = 0.4 to 0.6: 1.0 and stirring well until it becomes a paste. The horizontal grounding water consumption is just enough to wet all the dry powder and can be stirred into a paste. The vertical grounding hole can be taken as a high value by the amount of water added by the resistance reducing agent. Excessive water addition will extend construction time.
2), watering, coating, initial inspection, gently pour the prepared paste-like resistance-reducing agent (to prevent mud and debris from mixing into the resistance-reducing agent) to cover the grounding groove and the hole until all are covered. Grounding pole, and the thickness of the initial test coating is not less than 40mm, the four walls of the borehole are full, and should be supplemented when it is insufficient.
3), re-examination and backfilling After the initial condensation of the resistance-reducing agent, the surface of the resistance-reducing agent should be examined in detail, and the surface should be uniform, fully leak-free, and free from impurities. The thinnest part of the thickness of the coating body is not less than 40mm. To add a drag reducer. After the inspection is correct, remove the fixed thin line and gently backfill the fine soil without hard objects and branches. The thickness should be more than 20mm, then add other soil and compact. The surface of the backfill after compaction should be slightly higher than the surrounding ground level.
4). Grounding down the line is required. Grounding down the line. At the junction of the surface, it is necessary to apply 2~3 times of epoxy asphalt varnish, FVC paint or other durable paint. The length of the underground section should be the part of the buried drag reducing agent. Not less than 20mm, the length of the upper part of the earth's surface is not shorter than 30mm.
5) Deep well grounding Deep well grounding is sometimes necessary. Usually the depth of the well is determined by finding a formation with low resistivity or groundwater, typically tens of meters. Drilling with special machinery during construction, the hole diameter is 80 ~ 150mm. Sometimes it is accompanied by partial blasting, which loosens the surrounding soil to fill the resistance reducing agent and expand the resistance reduction effect. The grounding electrode is drilled with a steel pipe having a through hole of Φ10 to 15 mm on the four walls. The prepared pressure reducing agent is injected into the tube by pressure, and the resistance reducing agent surrounds the steel pipe from the inner and outer sides through the wall hole and enriches the entire borehole.