Marine

It’s no secret that the marine environment is particularly challenging for concrete. Structures in the tide or splash zones are especially vulnerable to ageing. The fluctuating moisture levels aggressively introduce contaminants such as chlorides and sulphates into the matrix of ... Read More

There are, of course, many reinforced concrete structures worldwide, such as bridges and wharves, which are exposed to aggressive chloride environments – and that display evidence of steel corrosion far too soon in their service life. As you are no ... Read More

The question of environmental impact, and environmental sustainability, is extremely significant for marine structures. Waterways are sensitive environmental zones. And there are large numbers of concrete structures which intrude on these zones. If you are responsible for the maintenance of ... Read More

Firstly, what are these two treatments? And why are we comparing them? Markham – adding life to concrete A SILANE IS … “Silane” refers to many compounds with four substituents on silicon, including an organosilicon compound. Examples include trichlorosilane (SiHCl3), ... Read More

The question of environmental impact, and environmental responsibility, is a major one. Whether you’re working in a sensitive environmental zone, or are concerned about the bigger picture of impact on the planet, we’d like to reassure you of the benefits ... Read More

Chlorides are reactive chemicals which enter concrete with constant movement of moisture in and out of the capillary pores. Chlorides, together with oxygen, reach the embedded steel and set up electro-chemical corrosion in the rebar. Untreated steel corrosion will very ... Read More

As you probably know, Aquron penetrating concrete hydrogels are an advanced solution for concrete remediation and durability. Aquron hydrogels penetrate deep into the porosity of the concrete, sealing against the ingress of contaminants, and immobilising moisture-borne reactants. As a long-term ... Read More

There aren’t many everyday environments that challenge concrete structures as much as the marine splash zone. A) Contaminants carried by moisture – chlorides, nitrates and a host of other reactive elements … and the moisture to help them move into ... Read More

The Port of Auckland is a large container and international trade port on the Waitemata Harbour. Its 55 hectares of wharfs and storage areas are mostly situated on reclaimed land. History Bledisloe Wharf was constructed in the late 1970’s using ... Read More

Of course, a concrete wharf is going to be exposed to water – whether directly in the splash zone or from the water vapour of the ambient environment. And of course, concrete will withstand water exposure. After all, its innate ... Read More

An astounding 10 cubic kilometres of concrete are used globally every year! Which is more important – short-term construction cost or long-term durability? That’s one of the dilemmas of the civil infrastructure industry, and concrete is a classic example. ‘Cutting ... Read More

It is generally recognised that moisture and moisture vapour carry contaminants which are detrimental to concrete. Yes, concrete contains and needs some moisture. No, we don’t want the contaminants which come with it. The challenge is how to allow the ... Read More