Process information
| Key Data Set Information | |
| Location | CN |
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| Use advice for data set | This dataset represents laboratory-scale preparation of phosphogypsum-based ecological cement and should be used for life cycle assessment (LCA) within the context of research and development. Users should note that the process data is derived from controlled laboratory conditions and may not directly correspond to industrial scale processes. Adjustments to the data may be required when scaling up the process. The dataset includes consideration of raw materials preparation, such as drying and grinding, and the processing stages up to but not including the use phase of the produced cement. Users should ensure that system boundaries are consistent when comparing to other LCA datasets and should incorporate end-of-life considerations if extending the scope of the study beyond storage of the cement. |
| Technical purpose of product or process | The phosphogypsum-based ecological cement, as described, is intended for experimental and research purposes in laboratory settings. The process is designed to investigate the production and application of sustainable building materials by utilizing industrial by-products such as phosphogypsum and fly ash. This type of ecological cement can be used in construction once fully developed and tested for its mechanical properties and sustainability credentials. |
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| General comment on data set | Preparation of ecological cement with phosphogypsum. Laboratory data. In the phosphogypsum-based ecological cement experiment, the main raw materials include phosphogypsum, fly ash, hydrate lime, cement, and early strength agent.Firstly, phosphogypsum is dried in an oven at 45°C to a constant weight to remove free water from phosphogypsum, and then then the dried phosphogypsum is calcined in a high-temperature electric furnace for a certain period of time. The calcined phosphogypsum is then put into a planetary ball mill for grinding for 6 minutes and screened through a standard sieve with a mesh size of 0.08 mm. At the same time, fly ash and hydrate lime are also sieved through a 0.08 mm sieve and dried in a drying oven. The cement used in the experiment also needs to be dried. After the above raw materials are pre-treated, the ingredients are calculated according to the designed ratio, and the mixed material is ball-milled for 3 minutes to mix evenly. After the mixed material is homogenized for 2-3 hours, it is weighed and poured into a JJ-5 planetary cement mortar mixer for stirring, and then molded into cement test blocks using a ZS-15 cement mortar vibrating table. The molded cement test blocks are placed for 24 hours, demolded, and naturally cured. After a certain age, their strength is tested. |
| Copyright | No |
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| Quantitative reference | |
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| Technological representativeness | |
| Technology description including background system | First put the phosphogypsum in an oven at a temperature of 45°C and dry it to a constant weight to remove free water in the phosphogypsum. Then put the dried phosphogypsum into a high-temperature electric furnace and calcine it for a certain period of time. Put the calcined phosphogypsum into a planetary ball mill and ball mill for 6 minutes, and then pass the ball-milled phosphogypsum through a 0.08mm standard sieve. While preparing phosphogypsum, fly ash and slaked lime are also passed through a 0.08mm sieve and then placed in a drying box for drying. The cement used in the experiment also needs to be dried. After the above raw materials are pretreated, the ingredients are calculated according to the designed ratio, and then the prepared mixture is ball milled in a ball mill for 3 minutes to mix evenly. After the homogenized mixture is homogenized for 2-3 hours, weigh it and pour it into the JJ-5 planetary cement mortar mixer for mixing. Use the ZS-15 cement mortar vibrating table to vibrate and shape the formed cement. After the block is placed for 24 hours, it is demoulded and naturally cured. After reaching a certain age, the strength is tested. |
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| Mathematical model | |
| Model description | 1t of phosphogypsum-based ecological cement developed in the laboratory as a functional unit. The system scope boundary of the phosphogypsum-based eco-cement study is defined as calcination of phosphogypsum, clinker grinding and eco-cement preparation, ending with cement storage. |
Modelling and validation
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