Unconfined compressive strength assessment of stabilized marine soil with cockle shell powder as sustainable material on subgrade pavement

Abstract Sustainable infrastructure is one of the sustainable development goals (SDGs) introduced by United Nation. By utilizing waste materials as recycled and reused in construction, it offers great benefits to people, economy environment for geotechnical project development. The low strength marine subgrade pavement soil can be improved chemical stabilization from abundant natural near coastal area. use seashells such cockle shells powder formed considered a potential additive replacing lime cement stabilized soil. Yet, its performance improving properties has not extensively been investigated. Thus, unconfined compressive with shell (CSP) was assessed experimentally. treated specimens were mixed 2.5%, 5%, 7.5% 10% CSP (by dry weight sample) prepared cylindrical dimension 38 mm diameter 76 height prior compression test based on optimum moisture content (OMC) obtained compaction test. All experiments carried out accordance British Standard. results show that improve highest 636.785 kPa which 157% increase compared untreated Therefore, study have shown addition significantly stabilization, especially highways, airport runways parking areas.