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Evaluation of a dry FGD material as a flowable fill

✍ Scribed by T.S. Butalia; W.E. Wolfe; J.W. Lee

Book ID
104135651
Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
81 KB
Volume
80
Category
Article
ISSN
0016-2361

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✦ Synopsis

Many ¯ue gas desulfurization (FGD) materials have low unit weight and good shear strength characteristics and thus hold promise for ¯owable ®ll applications. This paper focuses on the potential of using spray dryer FGD ash in ¯owable ®ll as a replacement for conventional ¯y ash. Several design mixes were considered. The design mixes consisted of varying amounts of FGD, cement, lime, admixture, and water. The mixes were tested in the laboratory for ¯owability, unit weight, moisture content, uncon®ned compressive strength (UCS), erodibility, set time, penetration, and long-term strength characteristics. Tests were conducted for up to 90 days of curing. The FGD ¯owable ®ll without any additives was observed to be comparable to regular (normal set) ¯owable ®ll in terms of placeability, UCS, and `diggability'. FGD ¯owable ®ll with additives and admixtures compared favorably with the characteristics of conventional quick-set ¯owable ®lls.

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