Evaluating feasibility of modified drilling waste materials in flexible base course construction

Evaluating feasibility of modified drilling waste materials in flexible base course construction
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改性钻井废料在柔性基层施工中的可行性评价

DOI：
10.1016/j.conbuildmat.2016.04.100
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Dichuan Zhang
Dichuan Zhang
中科院分区：
--
文献类型：
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作者：
C. Shon;C. Estakhri;Dong;Dichuan Zhang

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研究了改性钻井废弃物（MDWMs）作为道路基层材料的工程性能。这一目标是通过两个主要的室内试验评价的MDWM，这是基本材料的特性和基层材料的性能评价。MDWM的材料表征结果表明，它们是相对高pH值、低塑性和粘土砂材料，主要由石英和重晶石组成，属于德克萨斯州交通部（TxDOT）项目247柔性基础骨料中的4级类别。无侧限抗压强度（UCS）、三轴抗压强度、间接抗拉强度、湿度敏感性和地震模量试验数据表明，未处理的MDWM低于这些要求中的许多要求，并且与项目247中确定的典型基层要求相比，不是粒状基层材料。然而，在实验室中对经3%水泥处理的中密度水泥混凝土进行的评估显示，其性能良好，且不牺牲其作为适当基层材料的能力，并满足TxDOT第276项中M类基层的要求。然而，可能需要对该材料的质量控制进行监测，以实现一致的含水量和级配。此外，建议进一步开展工作，以确定该材料的最佳稳定剂含量和类型。
The study focuses on the evaluation of the engineering properties of modified drilling waste materials (MDWMs) as base course materials in roadway construction. This goal was accomplished by two main laboratory test evaluations of the MDWMs which are the basic material characterization and the performance evaluation of base course material. Material characterization results of the MDWMs indicate that they are relatively high pH, low plastic, and clay sand materials, mainly consisting of quartz and barite and belonging to Grade 4 category in Texas Department of Transportation (TxDOT) Item 247 Flexible Base Aggregate. The unconfined compressive strength (UCS), triaxial compressive strength, indirect tensile strength, moisture susceptibility, and seismic modulus test data show that the untreated MDWM is lower than many of these requirements and is not a granular base material when compared with the typical base course requirements identified in the Item 247. However, evaluation of the MDWMs with 3% cement treatment in the laboratory showed good performance without sacrificing their abilities as proper base course materials and satisfied the requirements of Class M base as per TxDOT Item 276. However, it may be necessary that the quality control of this material be monitored in order to achieve consistent moisture content and gradation. Moreover, further work to establish optimum stabilizer content and type would be recommended for this material.