Displaying items by tag: standards

UK: Researchers at Newcastle University have developed a new mortar using recycled polyethylene terephthalate (PET) from plastic bottles and silica aerogel. The team says that the mortar conforms to construction standards 413-1:2011, ASTM C270-10, and AS 1012/AS 3700. They added that it additionally reduces heat loss in the spaces between blocks or bricks by 55%.

Team leader Lidija Šiller said “For the next step, we wish to find collaborators such as a construction company to apply for funding and build the house with our ‘recipe’ for mortar. This will allow us to provide the direct evidence of potential energy savings and assess the economics for masonry buildings applications.”

US: The city council of Dublin, California, has enacted the Low-Carbon Concrete Code, requiring a given reduction in CO₂ emissions of all ready-mix concrete used in public and private construction projects. Independent News has reported that suitable alternatives to conventional concrete are locally available and offer cost parity, according to the city council.

Australia: Alternative cement and concrete producers have welcomed a new Australian civil engineering standard that allows builders to use reduced-CO₂ geopolymer concrete in infrastructure projects. Wagners, which produces Earth Friendly Concrete (EFC), said that the revision has removed one if its key barriers to wider market acceptance. EFC replaces 100% of cement with supplementary cementitious materials, including ground granulated blast furnace slag (GGBFS) and pulverised fly ash, by virtue of its binder technology. Wagners previously supplied EFC for the London Power Tunnels project in the UK, based on local technical approval-based building codes. The producer now expects a new standard like the Australian one to follow in the EU.

Canada: The city administration of Langford in British Columbia plans to enact regulations requiring all public and private projects to use reduced-CO₂ concrete. It plans to support the rules with parallel measures affecting the design of buildings.

Victoria News has reported that the city authorities previously mandated reduced-CO₂ cement for all projects in June 2022, but subsequently relaxed the regulations after only one company – Butler Concrete and Aggregates – completed the transition. Butler Concrete and Aggregates produces its reduced-CO₂ concrete using slag cement supplied by Lafarge Canada.