ASTM C90-16a PDF Download

ASTM C90-16a is a standard specification for loadbearing concrete masonry units. The specification covers hollow and solid concrete masonry units that are made from hydraulic cement, water, and mineral aggregates, with or without the inclusion of other materials. These units can be classified into three categories based on their weight: normal weight, medium weight, and lightweight.

The standard applies to both loadbearing and nonloadbearing applications of concrete masonry units. It specifies that these units should be manufactured using lightweight or normal weight aggregates, or a combination of both.

The specification also provides additional notes and footnotes that offer explanatory material. However, it clarifies that these notes and footnotes should not be considered as requirements of the standard. It also acknowledges that certain specific features, such as surface textures or particular properties, may need to be separately specified by the purchaser.

The purpose of ASTM C90-16a is to establish the physical properties and attributes of concrete masonry units manufactured with low or zero slump concrete and the specified constituent materials. The standard has been developed and refined over many years and is a benchmark for unit performance. However, it is important to note that products using alternative materials, manufacturing methods, or curing processes not covered by this specification should be tested for system performance in addition to unit performance.