Flowable fill

Flowable fill is defined by the American Concrete Institute47 as a self-compacting cementitious material that is in a flowable state at placement and has a compressive strength of 8.3 MPa (1200 psi) or less at 28 days. Most current applications for flowable fill involve unconfined compressive strengths of 2.1 MPa (300 psi) or less, which makes possible its excavation at a later date. [Pg.188]

The most important physical characteristics of fresh and hardened flowable fill mixtures are its strength development, flowability, hardening time, bleeding and shrinkage, unit weight, bearing capacity, shear strength, and corrosion resistance. Table 4.22 lists the standard test methods usually used to evaluate flowable fill materials. [Pg.188]

Natural sand is a major component of most flowable fill mixes. Ferrous spent foundry sand can be used as substitute for natural sand (fine aggregate) in flowable fill.48 49 Spent sands from nonferrous foundries and foundry baghouse dust can contain high concentrations of heavy metals that may preclude their use in flowable fill applications. Some of the engineering properties of spent foundry sand that are of particular interest when foundry sand is used in flowable fill applications include particle shape, gradation, strength characteristics, soundness, deleterious substances, and corrosivity. [Pg.188]

Construction procedures for flowable fill materials are no different than those for conventional earth backfill materials. The same methods and equipment used to mix, transport, and place flowable fill made with conventional aggregates may be used for flowable fill incorporating spent foundry... [Pg.188]

Mixing Proportions of Flowable Fill with Spend Foundry Sand (kg/m3)... [Pg.189]

Bhat, S.T. and Lovell, C.W., Design of Flowable Fill Waste Foundry Sand as a Fine Aggregate, Paper 961066, Transportation Research Board, 75th Annual Meeting, Washington, DC, 1996. [Pg.196]

Flowable fill Aggregate Cementitious materials - Pozzolan - Pozzolan activator Self-cementing material... [Pg.114]

Flowable fill - aggregate Coal fly ash Fonndry sand Qnarry fines... [Pg.115]

Bottom ash has been used as an aggregate material in flowable fill mixes Ponded ash also has the potential for being reclaimed and used in flowable fill Since most flowable fill mixes involve the development of comparatively low compressive strength, no advance processing of bottom ash or ponded ash is needed... [Pg.119]

Neither bottom ash nor ponded ash needs to be at any particular moisture content to be used in flowable fill mixes, because the amount of water in the mix can be adjusted in order to provide the desired flow ability... [Pg.119]

Flowable fill - - Flowable fill is a slurry mixture consisting of sand or other fine aggregate... [Pg.120]

Either pozzolanic or self-cementing fly ash can be used in flowable fill... [Pg.120]

Stabilized base or flowable fill cementitious materials... [Pg.123]

Portland cement concrete, flowable fill, and asphalt paving applications... [Pg.127]

Quarry byproducts (QBP) Mineral filler - The only quarry fines by-product that would require significant processing for any of the foregoing applications are the pond fines, which would have to be adequately dewatered before use - Pond fines would require a greater degree of dewatering for use as mineral filler in asphalt than for use in flowable fill 149-150... [Pg.128]

Other potential applications include its use as an aggregate in flowable fill, hot mix asphalt concrete, and surface treatments To be used as an aggregate ... [Pg.130]

Applications that could potentially make use of SSA in highway construction include the use of ash as part of a flowable fill for backfilling trenches, or as a substitute aggregate material or mineral filler additive in hot mix asphalt... [Pg.148]

Bhat ST, Lovell CW (1996) Design of flowable fill waste foundry sand as a fine aggregate. Transp Res Rec 1546 70... [Pg.268]

Today, flowable materials are used not only for most classes of restoring teeth, but also as fissure sealants. Current products differ considerably in formulation and filler content (Beun et al., 2008). Fissure sealants contain less than 25% inorganic filler, while conventional flowable filling materials have about 50-70% filler. Consequently there are considerable differences in properties between commercially available products. Beun et al. (2008) have studied the effect of these variations on rheological properties including storage modulus, and classified the products into three groups, based on their sohd-like behavior. [Pg.232]

Fly ash Cement replacement in concrete/grout, structural fill, flowable fill, waste... [Pg.471]

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