market for supplementary cementitious materials, UPR, ecoinvent 3.6, Undefined
Location: BR - Brazil
This market represents 1 kg of supplementary cementitious materials. Supplementary cementitious materials (SCMs) are materials used to substitute clinker in cement production. SCMs do not usually have an elastic demand as they are mostly produced as by-products. Examples of SCMs are: fly ash, by-product of coal-dired electricity, and blast furnace slag, by-product of iron and steel production. According to Scrivener et al. (2018) clay is the material that could supply an increased demand for SCMs.
In Brazil, according to the Brazilian cement Technology Roadmap 2019, unconstrained substitutes for clinker are clay and limestone filler. Calcined clay is the product currently available in ecoinvent and therefore the unconstrained supplier acting in the consequential system model.
ROADMAP tecnológico do cimento: potencial de redução das emissões de carbono da indústria do cimento brasileira até 2050 / coordenado por Gonzalo V isedo e Marcelo Pecchio. Rio de Janeiro: SNIC, 2019 64 p.
Scrivener et al. 2018. Calcined clay limestone cements (LC3). Cement and Concrete Research, 114, 49-56. https://doi.org/10.1016/j.cemconres.2017.08.017
Transport is taken from "market for calcinated clay, BR", comment: "This market dataset represents the supply of calcined clay in Brazil to cement production. Calcined clay is used as a pozzolanic material in cement production. Calcined clay production takes place in cement production plants and thus, no transportation is considered. No losses are considered."
Undefined unit processes (UPRs) are the unlinked, multi-product activity datasets that form the basis for all of the system models available in the ecoinvent database. This is the way the datasets are obtained and entered into the database by the data providers. These activity datasets are useful for investigating the environmental impacts of a specific activity (gate-to-gate), without regard to its upstream or downstream impacts.
This dataset represents a market activity in the ecoinvent database. A market activity is an activity that does not transform inputs, but simply transfers a specific intermediate exchange (i.e. products, including wastes and by-products) from supplying transforming activities to other transforming activities that demand this intermediate exchange as an input, e.g. from glycerine at the supplier to glycerine at the consumer. A market dataset collects all activities with the same reference product in a certain geographical region. Furthermore, it typically includes average transport requirements for that product within the geography in question, as well as inputs of the product itself to cover any losses in trade and transport. In other words, market activities are generally intended to represent consumption mixes of a given product in a certain geographical region. For more information: https://www.ecoinvent.org/support/faqs/methodology-of-ecoinvent-3/what-…
ecoinvent EULA