Recent Observations on Self-Hardening Slurries in Slurry Trenching
Bibliographic record
Abstract
Self-hardening slurries such as cement-bentonite and slag-cement-bentonite have been increasingly used in the installation of subsurface vertical barriers since the 1970s. In this paper, the authors build on previously reported lessons learned from the use of self-hardening slurries in vertical barriers to highlight recent developments and observations related to the applicability, specifications, installation, and testing of self-hardening slurry trenches. These lessons are based on direct observations from recent field applications. Lessons from this recent field experience offer new insight and reinforce existing knowledge. Topics addressed include the switch from type I/II Portland cement to type IL Portland cement, observations from field sampling and testing including coring and in situ permeability testing, comparison of strength and hydraulic conductivity results from mix design samples, wet-grab samples and core samples, discussion of changes in recent specifications, and updates on constructability considerations.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; both teacher heads agree on what is shown here.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".