Effectiveness of Costus asplundii maas as Admixture of Lime in Soil Stabilization of Highway Pavement
DOI: 10.36349/easjmb.2023.v06i02.001
archive: archived pipeline: cataloged verified
Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)
Summary
This study investigates the efficacy of using bagasse ash derived from *Costus asplundii maas* as an admixture with lime for stabilizing lateritic soil in highway pavement construction. The research addresses the need for sustainable, cost-effective soil stabilization methods that utilize agricultural waste products to improve the geotechnical properties of expansive soils, which are prone to swelling and shrinkage. The experimental methodology involved collecting soil samples from a newly constructed road in Rivers State, Nigeria. The bagasse ash was prepared by calcining *Costus asplundii maas* at 800°C for two hours, milling it into a fine powder, and sieving it to 75 microns. The study tested various mixtures of soil, a constant 8% lime, and varying proportions of bagasse ash (0%, 2.5%, 5%, 7.5%, 10%, and 12% by weight). Standard laboratory tests were conducted to evaluate maximum dry density (MDD), optimum moisture content (OMC), consistency limits (liquid limit, plastic limit, and plasticity index), California bearing ratio (CBR) for both unsoaked and soaked samples, and unconfined compressive strength (UCS) after seven days of curing. The results demonstrated that increasing the proportion of the lime-bagasse ash composite significantly altered the soil's engineering properties. MDD decreased from 1982 kg/m³ for untreated soil to 1384 kg/m³ at 12% bagasse ash, while OMC dropped from 12.95% to 7.91%. Consistency limits also reduced; the liquid limit fell from 44.47% to 31.40%, and the plasticity index decreased from 27.24% to 18.62%. Conversely, strength parameters improved. The unsoaked CBR increased from 9.23% to a peak of 15.61% at 10% bagasse ash, while the soaked CBR peaked at 14.36% at the same proportion. UCS values rose from 265.24 MPa for untreated soil to a maximum of 373.79 MPa at 10% bagasse ash. The study concludes that *Costus asplundii maas* bagasse ash is an effective admixture for lime stabilization, enhancing soil strength and reducing plasticity through pozzolanic reactions. Although peak strength values were observed at 10% bagasse ash, the authors recommend an optimum mixture of 8% bagasse ash combined with 8% lime for practical application. This approach offers a dual benefit: it improves the stability of subgrade soils suitable for road pavements and provides an environmentally sustainable solution for disposing of agricultural waste, potentially reducing reliance on conventional stabilizers like cement.
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed.
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-25 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-25 |
| chunk | success | chunk | — | — | 1 | 2026-06-25 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-25 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.