A　large　amount　of　cheap　hydraulic　fill　silt　and　sand　in　coastal　land　reclamation　project　will　be　generated,　meanwhile,　the　road　construction　project　in　this　region　needed　a　large　number　of　expensive　building　materials　such　as　cement　stabilized　crushed　stone.　In　view　of　these　problems,　different　stabilized　mixtures　of　hydraulic　fill　silt　and　sand　were　used　to　replace　the　traditional　construction　materials;　and　the　unconfined　compressive　strength　and　microstructure　of　stabilized　soil　were　studied.　Results　show　that　compared　to　the　cement　stabilizer,　stabilizer　developed　in　this　project　can　significantly　increase　the　strength　of　stabilized　silt　and　sand　mixture.　The　solidification　mechanism　is　that　the　new　stabilizers　can　produce　more　gel　and　expansive　hydrated　products,　and　the　organic　compounds　in　stabilizers　can　form　organic　molecules　by　polymerization　process,　which　can　wrap　the　particles　of　silt　and　sand　resulting　in　the　soil　structure　being　compacted.