00731130

Component

https://doi.org/10.3141/1546-08

http://scholar.google.com...vell&publication_year=1996

Flowable fill is generally a mixture of sand, fly ash, a small amount of cement, and water. Sand is the major component of most flowable fill mixes; consequently, using a waste material as a substitute for natural sand results in the beneficial use of the waste material. Waste foundry sand (WFS) was used as a fine aggregate in this study. Three green sands from ferrous foundries and two Class F fly ashes were used. A natural river sand was used for comparison. The flow behavior, hardening characteristics, and ultimate strength behavior of flowable fill were investigated. The penetration resistance necessary to sustain walkability as the fresh flowable fill hardens was determined, and the time necessary to achieve this penetration resistance was defined as "walkable time". The unconfined compressive strength at 28 days appeared to correlate well with the water-to-cement ratio. The 90-day compressive strength test results indicate that a maximum rise of 25 to 30% in long-term strength with respect to 28-day strength can be expected. The permeability of hardened flowable fill was found to be low (around 10 to the minus 6 power cm/sec). The pH of pore solution of hardened flowable fill indicated that the potential for corrosivity is low. The toxicity tests indicated that some WFSs are environmentally safe. The concepts explained are not necessarily restricted to flowable fill containing WFS; they can be generalized as being applicable to all flowable fills.

This paper appears in Transportation Research Record No. 1546, Issues in Geotechnical Engineering Research.

English

p. 70-78

1996

Transportation Research Record

0309059518

Figures (2) ; References (8) ; Tables (4)

Compressive strength; Concrete hardening; Fills; Fine aggregates; Flowable fill; Fluidity; Fly ash; Foundry sand; Hardness; Penetration resistance; Permeability; pH value; Toxicity; Ultimate strength; Waste products (Materials); Water cement ratio

Flowability

Geotechnology; Highways; Materials; I42: Soil Mechanics

TRIS, TRB

Feb 3 1997 12:00AM

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• ASSESSMENT OF IN SITU STRUCTURAL PROPERTIES OF LIME-STABILIZED CLAY SUBGRADES
• CONDITION ASSESSMENT OF INSTALLED TIMBER PILES BY DISPERSIVE WAVE PROPAGATION
• EFFECTIVENESS OF VARIOUS SLUDGE STABILIZATION AND SOLIDIFICATION METHODS
• ENGINEERING BEHAVIOR OF LIME-TREATED LOUISIANA SUBGRADE SOIL
• EVALUATION OF RESILIENT MODULUS OF CEMENTED LIME ROCK BASE MATERIALS IN FLORIDA
• EVALUATION OF SEASONAL VARIABILITY IN COHESIVE SUBGRADES USING BACKCALCULATION
• LOAD AND RESISTANCE FACTOR DESIGN OF DRIVEN PILES
• MOISTURE ACCUMULATION AND PORE WATER PRESSURES AT BASE OF PAVEMENTS
• PHOSPHOGYPSUM AS A COMPONENT OF FLOWABLE FILL
• PRACTICAL RELIABILITY-BASED DESIGN APPROACH FOR FOUNDATION ENGINEERING
• RESILIENT MODULUS TESTING OF LEAN EMULSIFIED BASES
• SHRINKAGE AND SUCTION PROPERTIES OF PLEDGER-ROEBUCK ALLUVIAL CLAY
• SOIL-FOUNDATION-STRUCTURE BEHAVIOR AT THE OAKLAND OUTER HARBOR WHARF
• SULFATE-BEARING SOILS: PROBLEMS WITH CALCIUM-BASED STABILIZERS
• USE OF HYDRATED FLY ASH AS A FLEXIBLE BASE MATERIAL
• USING POLYACRYLAMIDE GROUTS FOR PERMEABILITY CONTROL IN SAND