Can green concrete help address the sand and aggregate crisis? A scoping literature review
Bibliographic record
Abstract
Construction material industries, including the concrete sector, drive a huge demand for aggregates, including sand, one of the most widely consumed resources globally. Emerging advocacy campaigns on sand sustainability frame less aggregate intensive “ecological” or “green” concrete materials as solutions to mitigate the socio-environmental impacts emerging from sand consumption. This scoping literature review considers how the benefits from green concrete are portrayed in the construction material-centered academic literature. The scholarship reviewed highlights that conventional concrete materials generate environmental problems that green concrete products could help to mitigate, most notably CO2 emissions. Much less emphasis is placed on sand requirements, while the scholarship approaches sand sustainability very vaguely. We conclude that such caveats pose important challenges to the enactment of sounder sand policy. If the sand crisis is to be addressed, we advocate for the sand advocacy and green concrete epistemic communities to better align how they promote wider systemic change.
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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.011 | 0.053 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.021 | 0.018 |
| Science and technology studies | 0.002 | 0.003 |
| Scholarly communication | 0.006 | 0.006 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.004 | 0.002 |
| Insufficient payload (model declined to judge) | 0.005 | 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; a candidate call from one source (direct Gemma or distilled Codex), 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".