ASTM D4832/D4832M-23 pdf download – Standard Test Method For Preparation And Testing Of Controlled Low Strength Material (CLSM) Cylindrical Test Specimens.
1.1 This test method outlines the procedures for preparing, curing, transporting, and testing cylindrical specimens made from controlled low strength material (CLSM) to evaluate their compressive strength.
1.2 The method applies to CLSM materials that exhibit a strength greater than that of soil but less than 8400 kPa (1200 psi). Typically, the strength for most applications ranges from 350 to 700 kPa (50 to 100 psi).
1.3 Samples of the CLSM used to create the molded specimens must be collected after all necessary adjustments to the mixture proportions have been made on-site, including the addition of mix water and any admixtures.
1.4 This test method can also be utilized to prepare and test cylindrical specimens made from other mixtures of soil and cementitious materials, such as self-cementing fly ashes.
1.5 CLSM is commonly referred to by various names, including flowable fill, controlled density fill, soil-cement slurry, soil-cement grout, unshrinkable fill, and other similar terms.
1.6 Units—Values presented in either SI units or inch-pound units should be treated as separate standards. The values in each system may not be exact equivalents; therefore, each system should be utilized independently, and combining values from both systems may lead to nonconformance with the standard.
1.6.1 In the inch-pound system, the pound (lbf) is used as a unit of force (weight), while the unit of mass is represented in slugs. The slug unit will not be specified unless dynamic calculations (F = ma) are involved.
1.7 All observed and calculated values must adhere to the guidelines for significant digits and rounding as established in Practice D6026, unless otherwise specified by this standard.
1.7.1 When comparing measured or calculated values against specified limits, those values should be rounded to the nearest decimal or significant digits within the defined limits.
1.7.2 The procedures described for data collection, recording, and calculation in this standard are regarded as industry norms. They reflect the significant digits that should typically be retained. However, these procedures do not account for material variability, the purpose of data collection, special studies, or user-specific objectives. It is common practice to adjust the significant digits of reported data to align with these considerations. This standard does not address the significant digits used in analytical methods for engineering design.
