Mirafi RSi are the first truly multifunctional woven geotextiles developed to ensure reinforcement, separation, drainage and filtration and superior material interaction between the aggregate layers in an integrated way. The result is an assured significant improvement in road/subgrade performance with the added benefit of reduced sub base material volumes when constructing over soft soils.
In tough times, faced with ever increasing earthworks costs Mirafi RSi Multifunctional Woven Geotextiles offer engineers and contractors significant cost savings and improved road pavement performance. Mirafi RSi offers engineers and contractors a new solution for cost effective construction using site-won material.
Combining developments in polymer science and more than forty years of geosynthetics engineering experience, TenCate has broken the barriers of engineering over soft soils with large aggregate.
Mirafi RSi are the first truly multifunctional woven geotextiles developed to ensure reinforcement, separation, drainage and filtration and superior material interaction between the aggregate layers in an integrated way.
The result is an assured significant improvement in road/subgrade performance with the added benefit of reduced sub base material volumes when constructing over soft soils. Such is the quality of Mirafi RSi that the softer the soil, the better the performance and the greater the savings, particularly when used with large site-won aggregates.
No other geotextile on the market today offers the same combination of benefits and performance as Mirafi RSi.
In terms of technical performance, TenCate Mirafi RSi is proven to provide excellent separation with superior filtration and drainage. TenCate Mirafi RSi has a unique double layer construction with uniform openings which provide consistent filtration and flow characteristics of a fine to coarse sand layer.
Functions
TenCate Mirafi RSi is proven to provide an excellent separation with superior filtration and drainage.
TenCate Mirafi RSi has a unique double layer construction with uniform openings which provide consistent filtration and flow characteristics of a fine to coarse sand layer.
The high initial modulus of TenCate Mirafi RSi Engineered Woven Geotextile makes it ideal as a reinforcement solution in weak soils.
The high permeability of TenCate Mirafi RSi Engineered Woven Geotextiles allows rapid dissipation of excess pore water pressure that usually develops in the subgrade when wheel loads are induced, thereby helping to minimise undrained conditions and reduce plastic deformations in the subgrade.
Applications
TenCate Mirafi RSi Engineered Woven Geotextiles provide engineers with an alternative solution to traditional solutions for haul roads, unpaved roads and load supporting platforms, combining all the critical functions that contribute towards subgrade reinforcement.
TenCate Mirafi RSi Engineered Woven Geotextiles solve problems in the most demanding of construction conditions, as well as saving on construction costs by maximising the use of large onsite material.
Mirafi RSI is designed to maximise use of large site -won materials in haul road, temporary road and access track construction. This can deliver significant cost reductions as less imported fill is required in construction.
Advantages
Maximise material savings on site – Mirafi RSi can help deliver material cost savings of up to 33% by reducing the amount of base material required. This is a significant cost reduction.
Installation
Geosynthetic Placement
Place the geosynthetic directly on prepared surface. It is advisable to leave vegetative cover in place to provide a support matting for construction activities.
The geosynthetic should be deployed flat and tight with no wrinkles or folds. The rolls should be oriented as shown on plans to ensure the principle strength direction of the material is placed in the correct orientation. Adjacent rolls should be overlapped or seamed as a function of subgrade strength (CBR).
Prior to fill placement, the Engineered Woven Geotextiles should be held in place using suitable means such as pins, soil, staples and sandbags to limit movement during fill placement.
Fill Placement
Fill should be placed directly over the Mirafi RSi Engineered Woven Geotextiles in 200 mm to 300 mm loose lifts. For very weak subgrades, 450 mm lifts or thicker may be required to stabilize the subgrade. Most rubber-tired vehicles can be driven at slow speeds, less than 16 km/h and in straight paths over the exposed geosynthetic without causing damage. Sudden braking and sharp turning should be avoided.
Tracked construction equipment should not be operated directly upon the geosynthetic.
A minimum fill soil thickness of 150 mm is required prior to operation of tracked vehicles over the geosynthetic. Turning of tracked vehicles should be kept to a minimum to prevent tracks from displacing the fill and damaging the geotextile.
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