Sustainable Concrete (Material general)ⅤI

[1048] DEVELOPMENT OF ECO-FRIENDLY CONTROLLED LOW-STRENGTH MATERIAL UTILIZING FRESH CONCRETE WASTE AND BY-PRODUCTS

Ebsa HATEU¹, Akira HOSODA¹, Thang Ngoc PHAN², Mitsuya MIYAMOTO³ (1.Yokohama National University 2.University of Technology and Education, The University of Danang 3.Nagaoka Ready-Mixed Concrete Company)

Keywords: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.