2024 Volume 12 Issue 2 Article ID: 24-18136
Marine clay known for its adverse properties like high compressibility and low strength, cannot be utilized directly as a resource. To explore the potential of sustainable low-carbon composite solidifying materials in solidified marine clay, unconfined compressive strength tests were conducted on 9 groups of marine clay samples solidified with composite solidifying materials with different ratios. The main findings are as follows: (1) With an increase in GGBS content in the composite solidifying materials from 45% to 75%, the water content of samples decreased by 23.32%, while dry density increased by 14.67%. Simultaneously, the E50 of the stress-strain curve increased by 263%, and UCS increased by 21.44%. (2) With an increase in quicklime content in the composite solidifying materials from 0% to 10%, the water content of samples first decreased by 12.89% and then increased by 6.54%. Correspondingly, dry density first increased by 7.51% and then decreased by 3.30%, while UCS first increased by 15.95% and then decreased by 5.41%. (3) As GGBS content increased from 45% to 75%, the failure mode of the sample transitioned from plastic to brittle. Similarly, the sample without or with 5% quicklime displayed brittle failure, while those with 10% quicklime displayed plastic failure. (4) The Pearson's r between W/C and UCS of samples was -0.92 and -0.87, showing an obvious negative correlation, the sample of group F with the largest UCS (3.89 MPa) has the smallest W/C (3.71).
