Concrete　sludge　is　an　industrial　waste　produced　from　ready-mixed　concrete　plants.　Every　year,　a　large　quantity　of　concrete　sludge　is　produced　in　Japan.　At　the　same　time,　practical,　large-scale　disposal　options　for　the　concrete　sludge　are　limited,　and　the　cost　of　disposal　is　high.　Furthermore,　the　disposed　concrete　sludge　may　cause　serious　environmental　and　land　use　problems.　A　new　way　to　recycle　the　concrete　sludge　and　reuse　large　amounts　of　it　is　much　desired.　An　innovative　technology　to　cost-effectively　recycle　concrete　sludge　and　use　the　recycled　material　in　road　construction　was　developed.　Experiments　were　conducted　to　study　the　suitability　and　effectiveness　of　the　dried　sludge　powder　as　a　soil　stabilizer　to　improve　the　load-bearing　strength　for　a　clay　soil　with　high　moisture　content.　The　tests　results　showed　that　adding　dried　sludge　powder　to　the　selected　soil　with　high　moisture　content　can　significantly　decrease　the　water　content,　plasticity　index,　and　frozen　heave　of　the　soil　while　greatly　improving　the　load-bearing　strength.　The　stabilizing　effectiveness　of　the　dried　sludge　powder　is　greater　than　that　of　quicklime　in　early　stages.　However,　to　obtain　the　best　benefit　and　the　best　construction　quality,　some　measures　should　be　taken.