Encyclopedia of Historic Masonry Restoration

57 stone

57 stone is a common type of crushed rock aggregate used as a bedding for concrete subgrade.  57 stone is a combination of crusher run sieve size #5, #6, #7 rock. This is a non-compactable substrate material.          

Acoustical Sealants

Acoustical sealants are flexible materials, applied in a Liquid form between desperate building materials such as at the sole plate of walls where sound sound would otherwise have a more direct passage through partitions. A picture of one type of acoustical sealing follows below for… Read More »Acoustical Sealants

Aggregate or crushed stone

Aggregate or crushed stone is used in a multitude of different types of building applications. For example, under the majority of concrete flat work, crushed stone or aggregate will be installed as a  as a preparatory bedding. That underlying or substrate bedding allows for better… Read More »Aggregate or crushed stone

Asphalt paving

Asphalt is similar to concrete, both materials are largely comprised of aggregate, sand, and a cohesive binder. In the case of concrete, the binder is cement. By comparison though, in the case of asphalt the binder is a petroleum-based type of material bitumen material similar… Read More »Asphalt paving

Bat closers

To make the a patterned bond fit within the constraints of a building assembly space, masons use brick closer or brick bats.   Bat closers are very common, they are essentially bricks that have been cut in half. Quarter closers, on the other hand, are less common… Read More »Bat closers