Extending the Service Life4

Xypex Crystalline Technology

Xypex is a non-toxic, chemical treatment for concrete waterproofing and concrete protection. Xypex's primary and most distinguishing performance feature is its unique ability to generate a non-soluble crystalline formation deep within the pores and capillary tracts of the concrete - a crystalline structure that permanently seals the concrete against the penetration of water and other liquids from any direction. Xypex crystalline products are dry powder compounds composed of portland cement, silica sand and many active, proprietary chemicals.

Premature deterioration of reinforced concrete (RC) structures exposed to aggressive environments has become a worldwide problem with serious economic consequences due to maintenance, repair, and replacement of the RC structures and also environmental impact and safety issues.

Diffusion/penetration of aggressive substances into concrete occurs through concretes interconnected pores and surface cracks that have resulted from different sources. Cracks in concrete generally interconnect flow paths and increase concrete permeability. The increase in concrete permeability due to the progression of cracks  allows  more  water  and  aggressive  chemical  ions  to  penetrate  into  the concrete,  facilitating  premature deterioration.

Active chemicals in Xypex products react with the moisture and with by-products of cement hydration process to cause a catalytic reaction. This reaction generates a non-soluble crystalline formation throughout the pores and capillary tracts of the concrete that permanently seals the concrete and prevents the penetration of water and other liquids from any direction. Blocking the pores and sealing the cracks Xypex Crystalline Technology make the concrete impermeable. 

Figure 1 to Figure 3 show the crystalline growth in the pores and eventually blocking the pores.

Figure 4 illustrates the crack bridging by crystalline formation and eventually, sealing the cracks completely. The Xypex crystalline formation is able to seal the cracks up to 0.4 mm of width entirely. 


Figure 1, Xypex crystalline growth in concrete pores
Figure 2, Xypex crystalline growth and blocking the concrete pores
Figure 3, Complete blocking of the concrete pores by Xypex crystalline formation
Figure 4, Bridging and complete sealing the crack by Xypex crystalline formation