ASTM C953-17 PDF Download

The ASTM C953-17 standard specifies a test method for determining the time of setting of grout mixed to the fluid consistency required for its use in preplaced-aggregate concrete (PA concrete). This test method is also useful for evaluating the acceptability of grout components that need to be mixed to the fluid consistency required for PA concrete production.

The standard specifies the use of the Vicat apparatus for conducting the time of setting test for hydraulic cement grout mixtures. The test involves observing and measuring the time it takes for the grout to reach its initial and final setting points. The initial setting is the time when the grout begins to lose its plasticity and becomes rigid, while the final setting is the time when the grout acquires substantial rigidity and becomes hard.

By determining the time of setting, this standard provides a standardized method for assessing the performance and workability of grouts used in PA concrete. This information is crucial for ensuring that the grout can be mixed, placed, and consolidated properly in PA concrete applications, thereby contributing to the overall quality and durability of the structure.