Hallett Enviro Construct Sustainable Concrete Solutions.Hallett Group’s Enviro Construct range is helping Australia reach it’s goal of Net Zero Carbon Emissions by 2050.Enviro Construct has a range of mixes to suit all application of placement. Our range includes:• DIT – Department of Infrastructure and Transport mixes• Low Carbon – different GP Cement replacement quantities up to 65%• Green Star – concrete with the ability to give a 1, 2 or 3 Star Rating