ASTM C1798/C1798M-19 PDF Download

The ASTM C1798/C1798M-19 standard specifies the requirements for the use of returned fresh concrete in a new batch of ready-mixed concrete. The standard allows for customization of the requirements based on the specifications set by the purchaser. However, if there is a conflict between the purchaser's requirements and the standard, the purchaser's requirements take precedence.

The standard does not cover the placement, consolidation, curing, or protection of the concrete after it has been delivered to the purchaser. It should be noted that compliance with this standard does not automatically grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete. The permission to use returned fresh concrete may be addressed in purchase documents, which can reference this specification.

One important aspect to consider is that this specification does not apply to returned fresh concrete quantities less than 450 kg [1000 lb] or 0.2 m³ [0.25 yd³]. Finally, it should be noted that any notes and footnotes included in the standard are provided for explanatory purposes and are not considered as requirements of the standard itself.