WATER PERMEABILITY & FROST RESISTANCE
How ROMEX Paving Jointing Mortar Helps Storm Water Management
Water permeability plays a major role in an any environmental protection plan. Most modern municipal construction projects must meet strict environmental standards with the goal of promoting long term ecological sustainability. This includes preserving historic parts of towns and communities along with creating new leisure and recreational areas.
Simply put, reduced permeability increases surface water which flows into the drainage system. During times of heavy rain, the drainage system becomes overloaded, resulting in water flowing directly into our streams, lakes and oceans.
Rainwater is vital to the ecosystem and as such should return back to the natural cycle of things, rather than unfiltered into the drain. Our environmentally friendly rainwater diversion products help catch water by allowing it to permeate through the surface reducing impact on municipal drainage systems.
ROMEX products actively contribute to the groundwater ecosystem while at the same time increase groundscape strength without comprising function or creativity.
- Hard mortar raw density: 1,54 kg/dm3 | 0,89 oz/in3 1,62 kg/dm3 | 0,94 oz/in3
- Bending tensile strength: 3,4 N/mm2 | 493 psi 3,6 N/mm2 | 522 psi
- Compressive strength: 7,1 N/mm2 | 1030 psi 5,9 N/mm2 | 856 psi
- Static elasticity module: 820 N/mm2 | 118.931 psi 690 N/mm2 | 100.076 psi
- Water permeability value: - 3,91 x 10-3 m/s | 554,2 iph
( for a joint fraction of 10% )
A synthetic resin paving jointing mortar is always made of two components. The first component is a binding agent, which is responsible for hardening and stability. The other component is the filler material, which is responsible for water permeability. The filler material component is a washed, fire dried quartz sand with various grain sizes. The quartz sands have no zero components, unlike cement (cement dust). This means that hollow areas can form, through which water can seep. The size of the hollow areas, which depends on the grain size, determines the degree of water permeability. Especially during winter, the advantage of large hollow areas is evident. Water, that is still in the joints during ground frost, freezes and is able to expand into the hollow areas. This means cracks and breakage in the joints is avoided.
The capillary effect is the way liquids react when they come into contact with capillaries i.e. tight pipes, cracks or hollow areas in hard materials.
Example: if you dip a glass tube vertically into water, the water will rise slightly in the tube against gravity. This effect occurs due to the surface tension of the liquids themselves and from the border surface tension of the liquids with the hard surface ( in this example: glass).
In the construction industry, when synthetic resin bound paving jointing mortar is used i.e. on paved stone surfaces that have been jointed with synthetic resin based paving jointing mortar, the capillary effect can be seen in the joints, because depending on the jointing mortar used and the pore content or sand grain size, varying amounts of moisture are able to rise against gravity. This means that even if a foundation is only slightly water permeable, water will not remain permanently in the joints.
Using ROMEX systems, you can do your part to be environmentally friendly. ROMEX products strengthen surfaces, paths and squares, without sealing them!