Process information
| Key Data Set Information | |
| Location | CN |
| Reference year | 2013 |
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| Use advice for data set | When utilizing this dataset for Life Cycle Assessment of Portland-composite cement, it's crucial to adhere to the defined system boundaries which include the transportation and grinding of granulated blast furnace slag and fly ash, as well as the mining and transportation of limestone, iron ore, clay, gypsum, and coal. Processes like electricity production for the manufacturing should be considered in the impact assessment. The dataset should be applied assuming the recycling and energy recovery aspects are excluded. Ensure that the addition ratios for clinker and gypsum are at 60% and 5% of the cement mass respectively, as per the GB-175-2007 standard when applying material data to ensure accuracy and consistency. |
| Technical purpose of product or process | Portland-composite cement production using the new dry process applies predominantly to the construction industry. This cement variant is specifically designed for general construction purposes such as the building of structures, pavements, foundations, and is suitable for both reinforced concrete and pre-stressed concrete. The incorporation of granulated blast furnace slag and fly ash as partial substitutes for clinker not only optimizes the use of by-products from other industrial processes but also contributes to the reduction of CO2 emissions and energy consumption in the cement industry. |
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| General comment on data set | Use the new dry cement production technology as the technical object.The main raw materials required for portland-composite cement production include limestone, clay, iron powder, gypsum, granulated blast furnace slag and fly ash. During the production process, granulated blast furnace slag and fly ash are added to the cement instead of clinker. |
| Copyright | No |
| Owner of data set | |
| Quantitative reference | |
| Reference flow(s) | |
| Technological representativeness | |
| Technology description including background system | The main raw materials required for the production of composite Portland cement include limestone, clay, iron powder, gypsum, granulated blast furnace slag and fly ash. During the production process, granulated blast furnace slag and fly ash are added to the cement instead of clinker. Take The average value of the general Portland cement standard value of GB-175-2007 is used as the raw material data. Among them, the gypsum addition ratio is 5% of the cement quality, and the clinker addition ratio is 60% of the cement quality. Clinker is made of limestone, clay and Iron powder is used as a raw material and is made by false firing. |
| Flow diagram(s) or picture(s) | |
| Mathematical model | |
| Model description | The functional unit of LCA is 1t of composite Portland cement. The system boundaries include: the transportation and grinding process of granulated blast furnace slag and fly ash, excluding their production process; the mining and transportation of limestone, iron ore, clay, gypsum and coal; cement production and electricity production. The main cement production processes considered at the boundary of the cement system include: ① Mining and transportation of raw materials and transportation of industrial slag; ② Processing and pre-homogenization of raw materials; ③ Mixing of raw materials; ④ Raw meal grinding; ⑤ Raw meal homogenization; ⑥Clinker calcination; ⑦Clinker, gypsum, and industrial waste grinding treatment; ⑧Cement grinding. |
Modelling and validation
Administrative information
Inputs and Outputs