Table 9 Effects of specimen preparation for specimens with three-dimensional random fractures under various mix proportion conditions.
From: Proportioning optimization of transparent rock-like specimens with different fracture structures
A | B | Specimen preparation effect |
|---|---|---|
Low and lower | Medium and above | The heat release process during curing is slow, requiring a wait of more than 10 min, and the success rate of inducing fractures is very low |
Medium | Medium and higher | Â |
Higher | Lower and above | The curing time is 2Â ~Â 4 min, providing sufficient time to insert the metal shavings, and the success rate of inducing fractures is high |
Medium | High | Â |
High | Higher and high | The curing process is fast, making it difficult to successfully position the metal shavings. The heat release during curing is intense, and the specimen may even burst |
