Lee Wei-Hao, Hsieh Yi-Che, Wang Hsin-Wen, Ding Yung-Chin, Cheng Ta-Wui
Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Materials (Basel). 2021 Oct 10;14(20):5940. doi: 10.3390/ma14205940.
This study explores the practicability of using drill cutting (DC) as raw material to fabricate building bricks through the high-temperature sintering method and low-temperature geopolymeric setting (LTGS) process. Drilling mud can be recycled and reutilized after certain treatment procedures and is considered as a non-hazardous waste. However, the treatment process is time-consuming and not cost-effective. For the sintering method, low porosity and high mechanical strength bricks can be sintered at temperatures above 800 °C and meet CNS standards. For the low-temperature geopolymeric setting process, sodium silicate was selected as an activating agent for geopolymerization of drill cutting. Several process parameters, such as SiO/NaO modulus of alkali solution and low-temperature geopolymeric setting temperature, were investigated. The physical and mechanical properties of the fabricated brick were evaluated. According to the test results, 72.4 MPa compressive strength building bricks with low porosity (13.9%) and water absorption (6.0%) can be fabricated with 2.0 SiO/NaO alkali solution at 500 °C. The drill cutting brick fabricated not only meets the CNS 382.R2002 common brick standard, but also solve its disposal problem.
本研究探讨了以钻孔岩屑（DC）为原料，通过高温烧结法和低温地质聚合物固化（LTGS）工艺制造建筑用砖的可行性。钻井泥浆经过一定处理程序后可回收再利用，被视为无害废弃物。然而，处理过程耗时且不具成本效益。对于烧结法，可在800℃以上温度烧结出低孔隙率和高机械强度的砖，且符合CNS标准。对于低温地质聚合物固化工艺，选择硅酸钠作为钻孔岩屑地质聚合的活化剂。研究了碱溶液的SiO/NaO模量和低温地质聚合物固化温度等几个工艺参数。对所制备砖的物理和力学性能进行了评估。根据测试结果，使用2.0 SiO/NaO碱溶液在500℃下可制备出抗压强度为72.4MPa、孔隙率低（13.9%）且吸水率低（6.0%）的建筑用砖。所制备的钻孔岩屑砖不仅符合CNS 382.R2002普通砖标准，还解决了其处置问题。
