road construction material and hardening agent for making gravel roads last long
Macadamite is a superior road construction material and hardening agent for making gravel roads last long and preventing erosion caused by rain, traffic and wind.
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Macadamite has the following properties
Road construction material
Product Information
Macadamiteis an emulsion which forms tough plastic bonds with sand or clay soils to provide an excellently firm, dust free surface or sub-base.
Imparts water resistance, abrasion resistance, wind erosion resistance and strength to all types of soils.
Our road construction material, when used as a sub-base stabilizer, mixed with the scarified or loosened soil to a suitable depth by spray application thus saturating the soil, be it sandy or clay soil, will stabilize as well as harden and water-proof the soil to the depth that it is applied.
It is sprayed onto the surface of a suitably prepared or shaped gravel or sand road to form a reasonably long-lasting hard and water-proof surface.
The application rates are only about 10% of those of traditional materials so transport costs of the materials to site are dramatically reduced.
Our road construction material is safe to use and does not leach any solutes into ground water. At low dilutions (1 in 30) Macadamite can safely be sprayed on plants and spill on the skin is easily washed off with water before it dries.
Water tankers or other spray equipment should be washed out after use to prevent nozzles and pumps becoming blocked once the plastic dries.
A feature of Macadamite is that it can be compared with other products in standard civil engineering tests. At 0,5% on sand, strengths in excess of 1MPa are achieved using the unconfined core technique. Aggregates bonded with Macadamiteremain dry.
It can withstand ponded water for at least one week, a huge breakthrough for the industry which amounts to a game changing solution for customers who heretofore whished only for a 4 hour test underwater which was found to be challenging on it`s own.
Finally the breakthrough the industry has waited for!
Core samples take weeks to months to show signs of degradation under permanent water.
Is it safe
It is safe to use and does not leach any solutes into ground water. At low dilutions (1 in 30) Macadamite can safely be sprayed on plants and spill on the skin is easily washed off with water before it dries. Water tankers or other spray equipment should be washed out after use to prevent nozzles and pumps becoming blocked once the plastic dries.
How it works
Road construction material
USES
Load bearing, sub-bases for roads, loading zones, floors paths, walk ways etc.
Surface coats for roads, parking lots, tennis courts paths walk ways etc. for improved wear water resistance and dust suppression.
Embankment, slope and shoulder stabilization against water and wind erosion etc.
Macadamite is an emulsion which forms tough plastic bonds with sand or clay soils to provide an excellent firm, dust free, reduced slip, surface or sub-base.
Macadamite road bonding or stabilizing compound, when used as a sub-base stabilizer, mixed with the scarified or loosened soil to a suitable depth by spray application, saturating the soil, be it sandy or clay soil, will stabilize, harden and water-proof the soil to the depth that it is applied. This process obviates the necessity for importation of gravel etc.
Macadamite can also be sprayed onto the surface of a suitably prepared or shaped gravel or sand road to form a reasonably long-lasting hard and water-proof surface.
This product is not influenced by the type of soil it is mixed into or sprayed onto because it alters the plastic index of the aggregates.
Macadamite application rates are only about 10% of those of traditional materials so transport costs of the materials to site are dramatically reduced.
A feature of Macadamite is that it can be compared with other products in standard civil engineering tests. At 0,5% on sand, strengths in excess of 1MPa are achieved using the unconfined core technique. Aggregates bonded with Macadamite remain dry.
Advantages
Can be compared against standards in internationally accepted Civil Engineering tests.
Works in sands and clay soils.
Aggregates remain dry thus reducing hydration problems.
Application rates are approximately 90% less than those of conventional products.
Environmentally friendly.
Easy to use.
SURFACE TREATMENT
Mix approximately 12 parts of water to one part of Macadamite
Spray onto newly shaped surface at the rate of 0.25 litres Concentrate per square metre or 3 Lt. water concentrate mix per square metre.
Apply up to 6 times. (Total volume of concentrate emulsion 0,25 Lt.\M2)
Wait approximately 1 hour before trafficking.
FULL INCORPORATION
Mix up to 20 parts of water with one part of Macadamite
Use 1 to 2 drums of concentrate per 100 Metres of road 7 metres wide.(Approx. 0,75 Lt. concentrate per square Metre of road.)
Saturate the newly loosened or scarified soil.
Plough the soil over again to ensure proper mixture of the emulsion with the soil.
Repeat this process until satisfied that proper saturation has been achieved.
Compact the ground.
Surface treat compacted road with the remainder of emulsion once dry. (About 1 hour) repeat process and allow to dry before trafficking.
DUST SUPPRESSION
On building sites loading zones etc. mix between 1:20 and 1:100 with water and spray onto surface in small increments to prevent emulsion runaway. Apply 2 to 4 times per treatment. Treat regularly as necessary for optimal results.
Road construction material
How to modify with nanotechnology
“Nanomaterial is really small; five nanometers are equivalent to 0.05mm,” explained Maina. The materials bind with the poor quality material which needs to be modified, and can then change the behavior of the material.
For example, if the material is clay soil, it has a high affinity to water so when it absorbs water it expands, and when it dries out it contracts. Nanotechnology can make the soil water repellent. “Essentially, nanotechnology changes the properties to work for the construction process,” he said.
These nanotechnology-based products have been used successfully in many parts of the world, including India, the USA and in the West African region.
“Using nanotechnology lowers road construction costs”
( Professor James Maina of the civil engineering department at the University of Pretoria ).
Why road infrastructure is critical for economic growth
“We need to have roads to enable mass movement of people and goods,” said Maina. Well-maintained road infrastructure ensures optimal speed of movement, opening up economic opportunities for people. Moving goods safely is also important as damaged goods translate into economic cost, he explained.
“For a country to be competitive globally, we need to reduce costs as much as possible. We need well maintained and well planned road infrastructure,” Maina said.
Some of the challenges to road infrastructure development in the Southern African Development Community region are linked to skills shortages as well as the harmonisation of policies and procedures and standards. “From one country to another, the methods, procedures and protocols are not the same. Harmonisation at a policy level will help.
“If we can work with each other to improve skills levels and harmonise standards and processes, this will lead to economic opportunities and growth,” he said.
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Cosmo-Dec Everlasting Coatings originated in 1991, with a single product – Therma-Masta™.
Knowledge gained from manufacturing this complex and unique product allowed us to formulate new and innovative products such as Fire-Guard™, Aqua-Mite™, Aqua-Therm™, Clean-Air, etc. for specialty applications.
To-day, 3 decades on we manufacture more than 50 different types of construction chemicals out of our factory in Pretoria, Gauteng.