Landscape & Urban Design Issue 55 2022 | Page 46

CONCRETE & STONEWORK
Burnley Public Realm Photograph courtesy of Hardscape , hardscape . co . uk

STREETSCAPE BS 7533 ECO PAVING

MORTAR SYSTEM

CHANGING TOMORROW TODAY

Larsen Building Products BS 7533 compliant ECO paving mortar system utilises waste material from another manufacturing process . Before we delve into the detail , let ’ s look at some interesting facts around cements contribution to the worlds carbon dioxide emissions ( CO2 ), research into partial cementitious replacements & the impact on the environment in terms of CO2 reduction .
Concrete is the most extensively used manufactured material in the world and is only second to water as the most-consumed resource on the planet . The manufacturing process of cement results in a staggeringly high emission of greenhouse gases such as CO2 . Cement is the source of about 8 % of the entire world ’ s carbon dioxide ( CO2 ) emissions , according to Chatham House and as a result has an immense impact in contributions to global warming . Due to its immense demand , the cost of production of cement is increasing steadily upwards every year as raw materials from natural resources deplete .
Researchers within the cementitious industry have sought to reduce the impact cement has on the environment , whilst maintaining the quality of cementitious products . This research has focused on a search to find a waste material or by-product from manufacturing processes , which can be used as a partial replacement of cement such as Ordinary Portland Cement , OPC , in concrete , without compromising on its desired strength . The most common materials that are pozzolanic and are suitable for use as a partial replacement for cement are Ground Granulated Blast Furnace Slag ( GGBS ), Fly ash ( FA ), Rice Husk Ash ( RHA ), Silica Fume ( SF ). Larsen Building Products have opted for GGBS as a partial replacement to Ordinary Portland Cement ( OPC ) in our range of BS 7533 paving mortar products comprising of , FBC ECO permeable
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