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济南水泥稳定碎石取不出完整的芯样什么原因？
来源：/ 日期：2022-05-04
水泥稳定碎石在进行取样的时候，按照相关技术要求来讲，是应该能去取出完成的钻件来才对，但是有的时候为什么会取不出完整的芯样呢？
When cement stabilized gravel is sampled, according to the relevant technical requirements, it should be able to take out the completed drilling parts, but sometimes why can not take out the complete core sample?
水泥用量偏少造成骨料之间胶结不好，达不到强度；没有完全按照规范要求进行养护，按规范要求每一段碾压完成并经压实度检查合格后，应立即养生，宜采用湿砂进行养生，砂层厚度为7cm~10cm。也可采用沥青乳液进行养生，无述条件时，也可用洒水车结常洒水进行养生。养生期不宜少于7天。
Less cement amount leads to poor cementation between aggregates, which can not reach the strength; Maintenance is not carried out completely in accordance with the requirements of the specification. After each section is rolled according to the requirements of the specification and passed the compacting degree check, it should be kept in good health immediately. Wet sand should be used for health preservation, and the thickness of sand layer is 7cm~10cm. Asphalt emulsion can also be used for health, no condition, can also be used sprinkler knot often sprinkler health. The health preservation period should not be less than 7 days,
水泥稳定碎石层原材料级配不好；含水量不合适，以于水泥不能在混合料中完全水化和水解，水泥对碎石的稳定作用没发挥，影响水泥稳定碎石的强度；水泥选用不当，普通硅酸盐水泥，矿渣硅酸盐水泥和火山灰质硅酸盐水泥都可用水泥稳定碎石，但应选用初凝时间3h以上和终凝时间较长（宜在6h以上）。
The gradation of raw materials of cement-stabilized macadam layer is not good; The water content is not appropriate, so that cement can not be completely hydrated and hydrolyzed in the mixture, cement on the stability of gravel did not play, affecting the strength of cement stabilized gravel; Cement selection is not appropriate, ordinary Portland cement, slag Portland cement and volcanic ash Portland cement can be used to stabilize the cement gravel, but should choose the initial setting time of more than 3h and the final setting time is longer （should be more than 6h）。
不宜使用快硬水泥，早强水泥以及已受潮变质的水泥；拌合得不均匀，且没在含水量下充分压实，以及施工碾压时间拖的过长，破坏了已结硬的水泥胶凝，使其强度下降。
It is not suitable to use fast hard cement, early strength cement and cement which has been affected by moisture deterioration; Mixing is not uniform, and not fully compacted in the best water content, and the construction of rolling time drag too long, destroyed the hardened cement gelation, so that its strength decreased.
怎么预防呢？改进济南水泥稳定碎石的拌合工艺，尽量避免离析的产生，施工人员要加强对水泥剂的控制，发现了问题要及时改进与处理；抖合的计量器具要在开工前送计量质量检测中心进行检定，以保证称量的准确无误；在运输过程中要避免使用小型送料车，混合料要覆盖，减少运输途中水分的蒸发。
How to prevent it? Improve ji 'nan cement stable gravel mixing process, as far as possible to avoid segregation, construction personnel to strengthen the control of cement agent, found the problem to improve and deal with in time; The dithering measuring instruments shall be sent to the measurement quality testing center for verification before starting work to ensure the accuracy of weighing; In the transportation process to avoid the use of small feeder, mixture to cover, reduce the evaporation of water during transportation.
Ji 'nan cement stable gravel can not take out the complete core sample what reason? The above are the reasons and relevant preventive measures. If you still have similar problems when sampling, you can contact us through the website for consultation.
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