HIGH STRENGTH SELF-LEVELING MORTAR USING WASTE FOUNDRY SAND AND CEMENT COMPOSITION

摘要

PURPOSE: Provided is a high strength self-leveling mortar having characteristics of heat storage and no cracking by mixing cement composition(charcoal, fly ash and cement) with waste foundry sand. CONSTITUTION: The self-leveling mortar consists of 100pts.wt. of cement composition, 30-100pts.wt. of waste foundry sand, and optionally 0.1-2.5pts.wt.(based on 100pts.wt. of cement composition) of fluidifying agent based on naphthalene, wherein the cement composition comprises 30-79wt.% of portland cement and fly ash, as main materials, having a CaO/Al2O3 of 1:1 - 6:1, 20-60wt.% of charcoal, 1-10wt.% of alum to accelerate hardening and to improve strength.