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Sound waste and pollution management is an urgent priority for our Pacific Island leaders – ours here at SPREP is just to “Make it Happen.”

The construction industry is affected by the constant growth in the populations of urban areas. The demand for cement production has an increasing environmental impact, and there are urgent demands for alternative sustainable solutions. Volcanic ash (VA) is an abundant lowcost material that, because of its chemical composition and amorphous atomic structure, has been considered as a suitable material to replace Portland cement clinker for use as a binder in cement production. In the last decade, there has been interest in using alkali-activated VA material as an alternative material to replace ordinary Portland cement. In this way, a valuable product may be derived from a currently under-utilized material. Additionally, alkali-activated VA-based materials may be suitable for building applications because of their good densification behaviour, mechanical properties and low porosity. This article describes the most relevant findings from researchers around the world on the role of the chemical composition and mineral contents of VA on reactivity during the alkali-activation reaction; the effect of synthesis factors, which include the concentration of the alkaline activator, the solution-to-binder ratio and the curing conditions, on the properties of alkali-activated VA-based materials; and the mechanical performance and durability properties of these materials.

This form is to be used by all stakeholders seeking support from PacWastePlus programme. They are required to provide detailed information using this form.

A guide to identify three core waste streams icons associated with the PacWastePlus programme

This guideline provides the visual identity of the PacWastePlus programme. It establishes the the basic design principles to be applied to the PacWastePlus range of communication products, including publication

This guideline provides a guide on using the PacWastePlus programme logo correctly. Contents of this document must be observed whenever PacWastePlus staff, external partners or stakeholders communicate on behalf of the programme or its related activities. It should be used in conjuction with the PacWastePlus Communciations and Visibility Plan, Communications Guideline for Countries & Partners, and the PacWastePlus Branding Guidelines.

PACC reports