Work Item
ASTM WK66073

New Test Method for Laboratory Compaction Characteristics of Roller-Compacted Concrete Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3))

1. Scope

1.1 This test method covers the laboratory compaction method used to determine the relationship between molding water content and dry unit weight of concrete (compaction curve) compacted in a 6-in. (152.4-mm) diameter mold with a 10.00-lbf. (44.48-N) rammer dropped from a height of 18.00 in. (457.2 mm) producing a compactive effort of 56 000 ft-lbf/ft3 (2700 kN-m/m3). NOTE 1The modified effort test (see 3.1.3) is sometimes referred to as the Modified Proctor Compaction Test. 1.2 This test method applies only to concrete mixtures with maximum 1.5-in. (48-mm) size aggregates that have not been previously compacted in the laboratory; that is, do not reuse compacted material. 1.3 (Update to C09 version) The values in inch-pound units are to be regarded as the standard. The values stated in SI units are provided for information only, except for units of mass. The units for mass are given in SI units only, g or kg. 1.3.1 It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and a force (lbf). This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. These test methods have been written using the gravitational system of units when dealing with the inch-pound system. In this system, the pound (lbf) represents a unit of force (weight). However, the use of balances or scales recording pounds of mass (lbm) or the recording of density in lbm/ft3 shall not be regarded as a nonconformance with this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use (Warning Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skun and tissue upon prolonged exposure.)


RCC, roller-compacted, roller-compacted concrete


Currently, D1557 must be used to determine the maximum density of RCC. However, this is a soils method and does not address the unique problems associated with concrete. Also, many non-standard "assumptions" are made by the laboratory in order to perform the test adding variability to the result

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: C09.45

Committee: C09

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 12-03-2018

Technical Contact: Walt Flood IV

Item: 001

Ballot: C09.45 (19-01)

Status: Negative Votes Need Resolution