ASTM C476-20 PDF Download

ASTM C476-20 is a standard specification that outlines the requirements for grout used in the construction of masonry structures. The specification covers two types of grout: fine grout and coarse grout. Fine grout is manufactured using fine aggregates, while coarse grout is made using a combination of coarse and fine aggregates. The grout can be further classified as conventional grout, which requires mechanical consolidation through puddling or vibration during placement, or self-consolidating grout, which does not require mechanical consolidation.

The specification provides guidelines for the materials used in grout production, including cementitious materials, blended cements, lime, fly ash, slag, admixtures, aggregates, water, pumping aids, antifreeze compounds, and storage of materials. The proportions of these ingredients are determined based on the grout proportion requirements and the specified compressive strength.

The standard also details the procedures for producing grout, which can be done on-site by mixing the grout materials with water or by using ready-mixed grout transported to the job site. The materials for grout must be accurately measured to ensure the required proportions are maintained.

It is important to note that the specification includes explanatory notes and footnotes, which provide additional information but are not considered requirements of the standard.