The autoclave method of curing concrete masonry
At Boehmers, freshly molded block are loaded into the autoclave kiln for processing. The kiln is sealed and steam pressure of more than 120 psi (827 kpa) is applied at 100% humidity. After curing at 350�F (170�C), the steam pressure is released creating a vacuum that returns the block to an air-dry condition. The block is now harder and more stable than block produced using other curing methods. It is preshrunk with a relative moisture content of less than 1%. Fully cured block are less likely to chip or crack during shipping and handling.

Moisture Control
The structure of an autoclave cured block is less affected by changes in the weather assuring a more dimensionally stable finished wall. Autoclaved units meet the "M" Class in the fourth facet of C.S.A.

Less Efflorescence
The autoclave process eliminates efflorescence that may form on block surfaces. These deposits are formed from dissolved salts and free lime that leach from inside the block. The autoclave process converts these active soluble materials into stable inert compounds leaving the block surface attractive and comparatively stain-free.

Lighter Colour, More Uniform Texture
Concrete units manufactured by Boehmers using the autoclaved process are lighter and more uniform in colour through the naturally cured concrete. The lighter colour produces a more attractive finish when left exposed. In applications specifying a painted surface, the more uniform texture requires fewer coats of sealer and paint.

Download: Boehmers Block Literature (pdf file)
Download: Boehmers Certificate of Registration Bsi Management Systems (pdf file)
Download: Boehmers Normal Concrete Block Test Report (pdf file)
Download: BoehmersTwo-hour Fire Rated Concrete Block Test Report (pdf file)
Download: Boehmers Product Dimensions and Data (pdf file)
Download: Boehmers Current Block Price List (pdf file)