Xypex Admix Specifications (Shortform)

‘Concrete Durability Enhancement by Crystallization’
using a Catalytic, Crystalline Admixture.

The catalytic crystalline admixture shall conform to the requirements of AS 1478.1, “Chemical Admixtures for Concrete”, type Special Purpose and be of the dry, cementitious powder type, known as ‘Concrete Waterproofing by CrystallizationTM’. When introduced to the concrete, the admixture shall cause a catalytic, multiplicative crystalline growth response, whereby during the cement hydration process, the crystalline complex reacts with various metal oxides and salts (including potassium, unhydrated and partially hydrated cement particulate) as well as, but not only with, calcium hydroxide regardless of the cement type or blend.

The catalytic additive shall remain reactive whenever moisture is available within the concrete. The catalytic additive, when added to concrete as laid out in current specifications, will not detract from normal plastic and hardened concrete characteristics.

The catalytic crystalline waterproofing admixture shall cause the chemical control and permanent filling of capillaries, bleed tracts and small voids within the concrete with a multiplicative, inorganic, insoluble crystalline growth which:

-       Is resistant to greater than 100 metres of hydrostatic pressure
-       Is able to ‘bridge’ and seal static cracks of up to point four of a millimetre (0.4mm) in width
-       Is tolerant to a pH range of between 3.0 and 11.0, in periodic contact
-       Is unaffected by temperatures ranging from –32C to +30C, in constant contact
-       Is not affected by humidity, ultraviolet rays or oxygen levels (oxidisation)
-       Will prevent the penetration and movement of chloride ions within the concrete to below the level necessary to cause electrolytic corrosion of the reinforcement steel.

The catalytic crystalline durability enhancement admixture shall meet the following performance standards:-