STRENGTH PROPERTIES OF CEMENT-STABILIZED MUNICIPAL SOLID-WASTE INCINERATOR ASH MASONRY BRICKS

This research was carried out to determine the strength and durability of bricks made with municipal solid waste incinerator fine ash, using cement and limestone screenings. The ash was obtained from a waste-to -energy (WTE) facility as a combined ash (CA) in Miami, Florida. Diffe rent cement contents ranging from 4 to 10 percent were used. The resul ts confirmed that bricks with high compressive strength and modulus of rupture can be produced under static compaction pressure of 6 and 12 ksi (41.37 and 82.74 MPa) using nominal amounts of portland cement. Th e soaked compressive strength and modulus of rupture were also improve d by adding small amounts of cement. A 28-day air-dry compressive stre ngth as high as 7500 psi (51.71 MPa) was obtained at 40 percent ash an d 10 percent cement content. Modulus of rupture above 750 psi (5.171 M Pa) was also achieved in this investigation. In addition, the bricks s howed excellent resistance to abrasion and a lower water absorption..