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Title: Compressive Strength and Leachate Characteristics of New Green CLSM with Eco-Cement and Melted Slag from Municipal Solid Waste

Author(s): I Horiguchi and N. Saeki

Publication: Symposium Paper

Volume: 221


Appears on pages(s): 529-558

Keywords: bleeding; CLSM; compressive strength; eco-cement; flowability; fly ash; green concrete; melted slag; municipal solid waste; slag

DOI: 10.14359/13276

Date: 5/1/2004

This paper discusses the physical properties and leachate characteristics of a newly developed CLSM (Controlled Low Strength Materials) with a special type of cement as well as aggregate made from municipal solid waste. Eco-Cement, so-called in Japan, is the latest green cement made primarily from municipal refuse incineration ash and sewage sludge. Aggregate used in this paper was also made from the slag of municipal solid waste incinerator. High-volume off-specification fly ash was also used. This new type of green CLSM will he a promising sustainable material to reduce CO2 emissions. Test results showed an adequate strength development and reasonable flowability, especially when the mixture proportion is carefully designed. The leachate characteristics of this new CLSM are evaluated in this paper. Two types of standard tests showed acceptable leachate levels. From these tests results it was confirmed that a wide range of municipal solid waste may be applicable for the materials of the new green CLSM.