Covid

Mine road surface a week after application

Trial water test in progress showing a lack of ingress into the applied dust suppression solution

when it comes to dust suppression solutions. If the bitumen fraction is too high in the emulsion, it forms a layer that can sometimes become tacky, leading to lifting or movement under traffic. Another concern is the stability of the treated area in wet climates, when bitumen emulsion surface treatments that do not bond with the soil are washed away by rain.

AECI SprayPave has addressed these concerns by incorporating bitumen additives with properties that enable the Dustasolve-10 particles to bond with the soil particles even at low bitumen volume fractions. This both reduces the inhalable and respirable dust particles rising from unpaved roads and provides a strong waterproofing effect that mitigates water damage to the road surface.

Spray applications can be between 1 ℓ/m2 and 3 ℓ/m2 depending on the surface conditions. Maintenance of the area may require reduced product application rates while achieving further dust control and improving road strength and protection. Depending on traffic on the surface, a maintenance spray may be required one to two weeks after the initial application.

Dustasolve-10 has undergone trials at a mine in Limpopo and at three sites of AECI SprayPave’s parent company, AECI Much Asphalt, in Benoni and Eikenhof, Gauteng, and Pietermaritzburg, KwaZulu-Natal. The trials have demonstrated the suitability of the product for dust suppression and helped to determine optimum application rates and respray maintenance requirements in different conditions.

Jansen van Vuuren says trials to date have shown the new formulation to be quick penetrating, fast drying, non-tacky, waterproof, easy to apply and competitive in price.

Southern African Bitumen Association

After 40 years Sabita continues to provide a valuable service to the roads industry, both local and international. Every success this Association enjoys is driven by member companies and other stakeholders equally dedicated in creating quality black top road in southern Africa.

Continued development of bituminous material technology Production of world class technical guidelines and manuals Transfer of technology & knowledge with global partners Promotion of sustainable health & safety practices Provision of quality training that meets industry requirements Engagement of stakeholders on all issues relevant to a sustainable road network.

5 Lonsdale Building Tel: +27 21 531 2718 Fax: +27 21 531 2606 Lonsdale Way Pinelands 7450 email: info@sabita.co.za website: www.sabita.co.za