ASTM C1141/C1141M-15 PDF Download

The ASTM C1141/C1141M-15 standard provides guidelines for materials used as admixtures in Portland-cement shotcrete mixtures. The purpose of these admixtures is to alter the properties of the shotcrete mixture. The standard classifies the material into two types: Type I for dry mix shotcrete and Type II for wet-mix shotcrete. Each type is further divided into grades, with Grades 1-9 specified for both types.

In addition to the type and grade classification, shotcrete admixtures are further categorized as Class A or Class B, depending on whether they are liquid or non-liquid. The standard specifies that shotcrete admixtures must meet the requirements for the applicable type and grade.

Sampling of the admixture can be done using either grab samples or composite samples, as specified or required by the standard. Testing of the materials should be performed according to the specified number of tests and retests stipulated in the referenced standard.