论文部分内容阅读
我队为了解决钻孔坍塌、掉块,漏水、涌水问题,对“711”型水泥速凝剂进行了护壁堵漏的试验研究工作。现介绍于下。一配比试验在水灰比为0.4的水泥浆中掺入2.5～3.5％(重量比)的“711”速凝剂可在10分钟内凝固,早期强度有提高,28天强度为不掺速凝剂水泥强度的85％。影响凝固时间及强度的主要因素是: 1.掺量当水灰比不变时,“711”的掺量少,初凝时间长,结石体强度高;“711”掺量多,初凝时间短,但掺量不宜过多,以免影响水泥的后期强度,甚至会延长其凝固时间。“711”的适宜掺量应为水泥重量的2.5～3.5％。 2.水灰比“711”的掺量一定时,水灰比大,初凝时间长,结石体强度低;水灰
In order to solve the problems of borehole collapse, falling block, leakage, and water inflow, the team carried out experimental research on wall plugging of the “711” cement quick-setting agent. Now introduced in the next. In a ratio test, 2.5 to 3.5% (by weight) of the “711” accelerator was mixed in the cement slurry with a water/cement ratio of 0.4. It can be solidified in 10 minutes. The early strength is improved, and the strength is not accelerated for 28 days. 85% of cement strength. The main factors influencing the setting time and strength are: 1. Dosage When the water-cement ratio is constant, the “711” content is small, the initial settling time is long, and the stone body strength is high; “711” is more than the amount, the initial setting time Short, but the amount should not be too much, so as not to affect the late strength of cement, and even prolonged the solidification time. The appropriate amount of “711” should be 2.5-3.5% of the cement weight. 2. When the water-cement ratio of “711” is fixed, the water-cement ratio is large, the initial set-up time is long, and the strength of the stone is low;