Field performance of structural concrete slabs containing an hydrophobic admixture
Bibliographic record
Abstract
As part of a major rehabilitation project on a multi-story concrete parking structure, a portion of the floor was rebuilt using a concrete containing a hydrophobic admixture, with the aim to delay corrosion of the embedded steel reinforcement. Two sections of an elevated slab and two interior ramps, rebuilt with this concrete, were instrumented for remote monitoring. Two other sections of the elevated slab, rebuilt with normal concrete, were also instrumented and used as references. The field performance of these sections has been monitored for two years since reconstruction in November 2004. In all test sections, the measurements and calculations show that the concrete tensile stresses due to restrained drying shrinkage reached the tensile strengths at early ages, regardless of the type of concrete in place. A visual inspection confirmed the presence of deep cracks in all monitored concrete slabs and ramps. This cracking is more problematic for the floor areas treated with the hydrophobic admixture, where no waterproofing membrane was applied.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 0.000 |
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; a candidate call from one teacher head, not a consensus.
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".