What is the slump of flowable fill?
150 to 250 mm
The normal slump range for flowable fill mixtures is 150 to 250 mm (6 to 10 in). This range of slump corresponds to a flow time of 30 to 60 seconds through a standard flow cone.
What is CDF concrete?
1.01 DESCRIPTION Control Density Fill (CDF) is used as a low strength, self consolidating fill material for confined spaces which can be easily excavatable at a later time. CDF is characterized by a high maximum slump of 8 inches. CDF is not a structural concrete and should not be used in such applications.
What is CDF slurry?
Flowable fill, also. known as soil-cement slurry, controlled low strength material (CLSM), soil-cement grout, unshrinkable. fill, flowable mortar, controlled density fill (CDF), plastic soil-cement, and K-Krete, is a compound that. can be used as embedment or backfill material in lieu of compacted soil.
How hard does flowable fill get?
Flowable fill is defined by the American Concrete Institute (ACI) as a self-compacting cementitious material that is in a flowable state at placement and has a compressive strength of 8.3 MPa (1,200 lb/in2) or less at 28 days.
Can you hand dig flowable fill?
All flowable fill can be designed to meet the City’s strength requirements. Any strengths between 50 PSI and 100 PSI are very easy to hand dig and would also need less re-excavation.
What PSI is flowable fill?
Flowable Fill shall have a minimum 28 day compressive strength of 30 psi, unless otherwise specified.
What is a CDF in construction?
A Constructional Data Form, also known as a Component Data Form or CDF, is a list of critical components for a piece of equipment or device. The CDF is a critical tool for ensuring that a machine or product is constructed with the same critical components throughout the entire life cycle of production.
What is Flow fill concrete?
Flowable Fill (also known as Controlled Low Strength Material) is a flowable mixture which contains cement, sand, flyash, water and/or foam admixtures. Readily available – Ready-mixed concrete producers, using locally available materials, can produce flowable fill to meet project specifications.
Can you dig through flowable fill?
All flowable fill can be designed to meet the City’s strength requirements. Any strengths between 50 PSI and 100 PSI are very easy to hand dig and would also need less re-excavation. The other utilities in the immediate area would also remain secure under any re-excavation.
What is the difference between flowable fill and concrete?
Flowable fill is a self-compacting low strength material with a flowable consistency that is used as an economical fill or backfill material as an alternative to compacted granular fill. Flowable fill is not concrete, nor it is used to replace concrete. It hardens into a strong material with minimal subsidence.
Is concrete flowable fill?
Flowable fill is not concrete, nor it is used to replace concrete. Terminology used by ACI Committee 229 is Controlled Low Strength Material (CLSM). Other terms used for this material are unshrinkable fill, controlled density fill, flowable mortar or lean-mix backfill.
Which is the best description of flowable fill?
Flowable fill is sometimes referred to as controlled density fill (CDF), controlled low strength material (CLSM), lean concrete slurry, and unshrinkable fill.
Can a slump cone be used for flowable fill?
Using a standard slump cone for flowable fill is not practical because the material can spread up to three feet due to its fluidity. The consistency (flowability) of the flowable fill mixture can be measured using ASTM D 6103. This procedure was developed specifically to quantify the flow characteristics of flowable fill.
What kind of backfill material is CDF-Fe?
CDF-FE and CDF-VFE are backfill materials, which are delivered by ready mixed concrete mixers (R/M). CDF-FE and CDF-VFE are a flowable, excavatable, self-compacting and self-leveling material, which after solidifying will have the structural characteristics of a well-compacted load bearing soil.
What kind of concrete is used for flowable fill?
Flowable fill is sometimes referred to as controlled density fill (CDF), controlled low strength material (CLSM), lean concrete slurry, and unshrinkable fill. Flowable fill materials will be used as only as a structural fill replacement on VA projects.