DESCRIPTION

Comment

HOT ASPHALT

Comment

HYDRO ASPHALT TECHNOLOGIES

Cost of Installation / Application Equipment

High

These specialized machines can run into millions of Rands.

Low

Highly mechanized installation can be used, however only rakes, shovels, watering cans,  wheel-barrows, T-Bars, basic  and common labour is required.

Application Methods

-

Machines are a prerequisite in the use of hot applications to ensure a smooth finish

-

Machines can be used as in a Hot application to ensure the same type of finish, however with Top Tar excellent finishes are obtained with hand placing methods

Cost of Maintenance of Equipment

High

Hot Asphalt requires hazardous solvents to clean equipment; this method is not only costly but shortens the life span of the equipment.

Low

Hydro Asphalt Technologies is a water-based product and only requires water to maintain and clean equipment.

Accuracy of Mix Proportions

Yes

Accurate quality requires accurate control at the plant

No

The unique design of this product can accommodate gap-graded aggregate as well as increased bitumen levels.

Level of Skilled Labour

High

Hot Asphalt highly specialized personnel are required

Low

Hydro Asphalt can be applied with highly specialized personnel or personnel that have only undergone a basic training course.

Distance to travel from the production plant

Max 300 – 400 kms

Well Covered and insulated trucks must be used.

No limit

With a tarpaulin covering the top of the truck, this product can be transported anywhere and at any distance without deteriorating.

Wastage

Yes

Excess material is rejected and dumped due to heat loss creating further Environmental problems.

No

This product can be stored for long periods of time on site by covering product with either a canvas or plastic tarpaulin or bags. There is no wastage at all.

Storage

No

These products have to be applied immediately after manufacture. The window time frame is small and place pressure on contractors to utilize material before it sets.

Yes

No short time limit on the storage periods. Excellent results have been obtained after 2 years of storage under canvas and in pre packed bags. Provided the bag is not perforated.

Necessity of a Prime Base Coat

Yes

Hot Asphalt cannot be applied directly onto the base course without a primer base coat being applied first.

No

Hydro Asphalt does not require a Primer Base. Being a water based product it effectively creates its own primer base when applied to a wet base course.

Temperature sensitivity at point of application.

Yes

Hot asphalt is extremely sensitive to climatic conditions and road temperature.

No

Hydro Asphalt is not at all sensitive to climatic conditions. Successful applications were carried out at below freezing point temperatures, as well as, temperatures above 50 Degree's C.

Limited Thickness Requirement for Application

Yes

Hot Asphalt is limited to a minimum thickness of 20mm for surfacing applications.

No

Hydro Asphalt can be applied at a minimum thickness of 10mm, thus doubling surface coverage for rural and outlying roads with a low traffic class.

Susceptibility to Bleeding and Lateral Movement

Yes

These two problems are often an issue relating to the application of hot mix materials. These conditions result in the deterioration of the road and creation of major potholes.

No

Hydro Asphalt does not bleed and shows no inherent susceptibility to lateral movement.