Monitoring the Tendency of Heavy Metals Leached from Cement Mortar
Authors:
- 1 January 2004
- journal article
- Published by American Society of Civil Engineers (ASCE) in Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
- Vol. 8 (1) , 26-30
Abstract
This study presents the results of two leaching tests for cement mortars. Industrial sludge slag is employed as a fine aggregate to determine the mortar’s leaching tendency. The proportion of quartz sand replaced by slag in cement mortars was 0, 10, 20, 30, 40 and 50% (weight-to-weight ratio), and the cement mortars were cured for seven, 28, and 90 days. Toxicity characteristic leaching procedure (TCLP) and semidynamic leaching test (SDLT) methods were used to determine the leaching characteristics of both sludge slag and cement mortars. All the TCLP leaching rates were lower than 1%. TCLP leaching results reveal that the concentrations of slag and cement mortar were not significantly related to the replacement ratio, but declined as the curing period was increased. The results of the SDLT show that heavy metal concentrations in the long-term leachate increased with the replacement ratio, as expressed by the input amounts of heavy metals and the leaching period. The TCLP and SDLT leaching results comforta...Keywords
This publication has 15 references indexed in Scilit:
- Melting Properties of Bottom and Fly Ashes Derived from Incineration of Municipal WasteJournal of the Ceramic Society of Japan, 1998
- The behaviour of heavy metals and phosphorus in an ash melting processWater Science & Technology, 1997
- Utilization of sewage sludge ashes in the brick and tile industryWater Science & Technology, 1997
- Production of glass ceramics from sewage sludgeWater Science & Technology, 1997
- Full scale application of manufacturing bricks from sewageWater Science & Technology, 1997
- Characteristics of heavy metal release from incinerated ash, melted slag and their re-productsWater Science & Technology, 1997
- Benefits of slag and fly ashConstruction and Building Materials, 1996
- Long-term behaviour of toxic metals in stabilized steel foundry dustsJournal of Hazardous Materials, 1995
- Leach models: Theory and applicationJournal of Hazardous Materials, 1990
- Leaching of Inorganic Hazardous Constituents from Stabilized/Solidified Hazardous WastesHazardous Waste and Hazardous Materials, 1988