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Investigation into physical and mechanical properties of SRX-stabilised crushed rock using different compaction methods

ABSTRACT This study investigates the physical and mechanical properties of Solution Road RomixSoilfix stabilized crushed rock material (SRX-SCR) compacted by quasi-static compaction method (QSCM) and vertical vibratory compaction method (VVCM). The maximum dry density, optimum water content, mineral aggregate gradation, compressive strength, and splitting strength were determined to assess the compaction effect of SRX-SCR. Results show that the maximum dry density and optimum water content of SRX-SCR subjected to VVCM are 1.03 and 0.80 times of the values obtained in the specimens that underwent QSCM. Compared with that before compacting, the water content in the specimen after molding by QSCM decreases by 0.4–0.8%, and the loss ratio reaches 9.3–17.0%. The water content in the specimen after compacting by VVCM decreases by 0.02–0.03%, and the loss ratio is only 0.6–0.8%. The mineral aggregate gradation of the specimens before and after compacting with QSCM significantly changes, but the changes are minimal in the VVCM specimens. The compressive strength, splitting strength, and resilient modulus of the VVCM specimens are higher than those of the QSCM specimens. The physical and mechanical properties of the laboratory produced SRX-SCR by VVCM is more consistent with the field measurements than the laboratory produced SRX-SCR by QSCM.