環境配慮型コンクリート（材料一般）６

[1048] 生コンクリートの廃棄物や副産物を活用した環境負荷低減型のCLSMの開発

HATEU Ebsa¹, HOSODA Akira¹, PHAN Thang Ngoc², MIYAMOTO Mitsuya³ (1.Yokohama National University 2.University of Technology and Education, The University of Danang 3.Nagaoka Ready-Mixed Concrete Company)

キーワード：controlled low-strength material、eco-friendly material、by-products、fresh concrete waste、improved water absorption fine aggregate、excavatability、backfilling buried pipes

This study investigates the utilization of concrete sludge powder (CSP), reused waste from the sludge cake generated by returned concrete and concrete truck cleaning, as a partial replacement for Improved Water Absorption (IWA) fine aggregate in Controlled Low-Strength Material (CLSM). The processed CSP was incorporated into CLSM mixes at replacement levels of 0%, 10%, 15%, 20%, and 25% by weight of the IWA fine aggregate. Experimental results indicate that up to 20% replacement with CSP produces an eco-friendly CLSM suitable for backfilling buried pipes.