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- W640136384 abstract "Cement manufacture accounts for 3-5 percent of total global carbon emissions. There is a growing interest in reducing the environmental impact and conserve limited natural resources. In cement production, clinker productions consume 87.5 percent of the total energy consumed in the cement manufacture.Cementa has since many years, focused on reducing the environmental impact of cement production. The work has involved the entire production process from selection of alternative fuels to the development of cement with less clinker content. During 2013/2014, two new types of cement (Bascement and CEM II / B) will be introduced to the Swedish market. Cementa is also working to reduce cement use in concrete and this thesis is a part in this work. By developing better concrete proportioning tool based on a better understanding of the influence of the concrete constituents on the fresh concrete properties, cement consumption is reduced. The following report deals with new types of cement with less clinker content, where the clinker partially is replaced by fly ash, slag and limestone. As a reference, the study takes today's construction cement from Slite and Skovde. The study aims to find out how today´s construction cement and the new cement types differ in their rheological properties. Experiments have been conducted on mortar and concrete with different plasticizers and air-entraining agents. The study also addresses air-entrainment demand and open time of fresh concrete with new cement types. The results show that the new cement types, Bascement and CEM II/B, have better rheological properties than their references Slite and Skovde cement. Regarding the demand for air-entraining agent’s, Bascement show significantly greater demand than Slite cement, while the difference in air-entraining demand between Slite cement, Skovde cement and CEM II / B is very small.Furthermore, the results show that concrete with Bascement constitutes larger 28-day strength than the concrete with Slite cement, while the concrete strength with CEM II/B is similar to its reference cement Skovde. Since the strength development properties are dealt with in previous studies, these test series are limited to 28-days strength testing only." @default.
- W640136384 created "2016-06-24" @default.
- W640136384 creator A5015993742 @default.
- W640136384 date "2013-01-01" @default.
- W640136384 modified "2023-09-24" @default.
- W640136384 title "Samverkan mellan nya cementtyper och tillsatsmedel för betongtillverkning" @default.
- W640136384 hasPublicationYear "2013" @default.
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