Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation
Yellow phosphorus slag (YPS) is a byproduct from the production of yellow phosphorus. It has potential pozzolanic activity and can be used as a supplementary cementitious material. However, the early strength of cement mortar decreases significantly with increasing YPS dosage, which restricts the ut...
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MDPI AG
2023-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/17/6047 |
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| author | Xinyue Liu Xiaoming Liu Zengqi Zhang Chao Wei Qingsen Zeng Yantian Li Shanliang Ma |
| author_facet | Xinyue Liu Xiaoming Liu Zengqi Zhang Chao Wei Qingsen Zeng Yantian Li Shanliang Ma |
| author_sort | Xinyue Liu |
| collection | DOAJ |
| description | Yellow phosphorus slag (YPS) is a byproduct from the production of yellow phosphorus. It has potential pozzolanic activity and can be used as a supplementary cementitious material. However, the early strength of cement mortar decreases significantly with increasing YPS dosage, which restricts the utilization of YPS in cement and concrete. This study aimed to increase the pozzolanic activity of YPS ash by thermal activation. The strength method, alkali dissolution method and polymerization degree method were used to evaluate the effect of thermal activation at different temperatures on the pozzolanic activity of YPS ash. The results showed that YPS ash calcined at 800 °C helps to enhance the early strength because the fluorine in cuspidine (Ca<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>F<sub>2</sub>) is insoluble, reducing the retarding effect on the mortar. The higher late strength of YPS ash calcined at 100 °C was due to the low polymerization degree of [SiO<sub>4</sub>]. The pozzolanic activity of YPS ash is positively correlated with the dissolution concentration of (Si + Al) and the compressive strength and negatively associated with the polymerization degree. This paper shows a possibility for the large-scale utilization of YPS. |
| first_indexed | 2024-03-10T23:18:34Z |
| format | Article |
| id | doaj.art-87d6fdaf0c5d44c5a791330061a6d0f6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:18:34Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-87d6fdaf0c5d44c5a791330061a6d0f62023-11-19T08:29:33ZengMDPI AGMaterials1996-19442023-09-011617604710.3390/ma16176047Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal ActivationXinyue Liu0Xiaoming Liu1Zengqi Zhang2Chao Wei3Qingsen Zeng4Yantian Li5Shanliang Ma6State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaYellow phosphorus slag (YPS) is a byproduct from the production of yellow phosphorus. It has potential pozzolanic activity and can be used as a supplementary cementitious material. However, the early strength of cement mortar decreases significantly with increasing YPS dosage, which restricts the utilization of YPS in cement and concrete. This study aimed to increase the pozzolanic activity of YPS ash by thermal activation. The strength method, alkali dissolution method and polymerization degree method were used to evaluate the effect of thermal activation at different temperatures on the pozzolanic activity of YPS ash. The results showed that YPS ash calcined at 800 °C helps to enhance the early strength because the fluorine in cuspidine (Ca<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>F<sub>2</sub>) is insoluble, reducing the retarding effect on the mortar. The higher late strength of YPS ash calcined at 100 °C was due to the low polymerization degree of [SiO<sub>4</sub>]. The pozzolanic activity of YPS ash is positively correlated with the dissolution concentration of (Si + Al) and the compressive strength and negatively associated with the polymerization degree. This paper shows a possibility for the large-scale utilization of YPS.https://www.mdpi.com/1996-1944/16/17/6047yellow phosphorus slagthermal activationpozzolanic activitycompressive strengthalkali dissolutionpolymerization degree |
| spellingShingle | Xinyue Liu Xiaoming Liu Zengqi Zhang Chao Wei Qingsen Zeng Yantian Li Shanliang Ma Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation Materials yellow phosphorus slag thermal activation pozzolanic activity compressive strength alkali dissolution polymerization degree |
| title | Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation |
| title_full | Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation |
| title_fullStr | Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation |
| title_full_unstemmed | Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation |
| title_short | Investigation of the Pozzolanic Activity Improvement of Yellow Phosphorus Slag with Thermal Activation |
| title_sort | investigation of the pozzolanic activity improvement of yellow phosphorus slag with thermal activation |
| topic | yellow phosphorus slag thermal activation pozzolanic activity compressive strength alkali dissolution polymerization degree |
| url | https://www.mdpi.com/1996-1944/16/17/6047 |
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