Deep Cement Mixing (DCM) Quality Assessment using Real-Time Operational Parameters Data-Video

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Video Summary

The study, conducted with Singapore’s Housing and Development Board, explores real-time quality control for deep cement mixing (DCM) columns used to stabilize a stormwater pond embankment and create a low-permeability barrier. Conventional checks rely on coring weeks after construction, delaying corrective action. Researchers analyzed construction data from more than 300 columns, plotting key machine parameters—including depth, grout and water flow, and rotation speed—to identify deviations from expected operating patterns.<br /><br />They classified 77% of columns as normal, 20% as showing minor deviations, and 3% as significantly abnormal. Some columns received substantially more water; where cement dosage did not compensate, strength was lower. In another group, excess cement more than compensated, producing much higher-than-required strength. The findings show that clear, timely interpretation of machine data can flag potential quality issues during construction and support earlier intervention. The next step is automating analysis and incorporating statistical acceptance criteria.

Keywords

deep cement mixing

real-time quality control

construction machine data

grout flow monitoring

stormwater embankment stabilization