DRYCRETE versus H2S & Other ACIDS
An effective barrier against acid intrusion
DRYCRETE eliminates, or at least significantly retard, hydrogen sulphide (H2S) and other acids precipitated deterioration of concrete.
DRYCRETE, once applied, immediately penetrates past the concrete surface to permeate its matrix. As it does so, a portion of this unique solution becomes chemically absorbed by the cement gel or paste (Calcium Silicate Hydrate or C-S-H), becoming a residual part of this paste component, causing it to immediately become significantly more acid and chemical resistant.
DRYCRETE further permeates into the concrete's interior, and reacts with free alkali (not affecting bound alkali) and immediately transforms from a low solids solution to a 100% solids insoluble mass within the concrete's interior, occupying its accessible pore spaces. This chemical transformation produces a colloidal gel, not generating heat or internal pressure, providing increased density and additional bonding strength to the concrete.
DRYCRETE produced colloidal gel mass is made up of distinct spherically-shaped particles which are made up of microscopic spine-shaped pore networks containing pores smaller than a molecule of free water (moisture). This permits the treated concrete to breathe as needed, but does not allow water or free moisture passage, except in greatly-diminished volume vapor form. Water / free moisture (including acids) present in concrete prior to a treatment, becomes chemically tied up in, and even participates in the formation of the colloidal gel mass rendering these liquids harmless to the concrete.
DRYCRETE permeates to concrete's interior, rendering the cement paste significantly more acid resistant, and the colloidal gel barrier is created just beneath the surface porosity, where most of the concrete's free alkali normally lays. This prevents acid-producing agents entry into the concrete's interior from the treated surface.
DRYCRETE is recommended for use as a protective barrier in the preservation of concrete subjected to exposure or potential exposure to hydrogen sulphide gas or other acid-producing agents.
DRYCRETE when utilized in new construction, serves as a primary concrete integral protecting barrier and should a topical coating / liner of choice eventually fail, it will continue to protect the integral mass of the concrete structure. This same concept applies when rehabilitation plans call for the use of sacrificial cementitious material liners.