Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation and performance of AACM with red mud and GGBFS: effectiveness of alkali activator
Red mud (RM) is a kind of solid waste by the production of alumina. Long-term storage of RM can occupy a large amount of land and cause serious pollution to soil, air and water. Alkali activated cementitious material (AACM) is a new type of green environmental protection material, which provides a new idea for the efficient use of RM. In this research, RM is thermally activated and mixed with ground granulated blast-furnace slag (GGBFS) and alkali activator to prepare AACM. In order to improve the performance of this AACM, the influence of activator content and type on the chemical shrinkage and mechanical property of the AACM were studied and discussed comprehensively. The obtained results show that the used RM shows best activity after calcined at 700 °C; the suitable ratio of RM to GGBFS is 5:5. Water glass has better activation effect on the AACM made with RM and GGBFS than calcium hydroxide (Ca(OH)2). But, the use of water glass and Ca(OH)2 together is more appropriate for this AACM. The strength of the AACM activated by 20 wt% Ca(OH)2 and 20 wt% water glass can reach 88 MPa at 120 days.
Preparation and performance of AACM with red mud and GGBFS: effectiveness of alkali activator
Red mud (RM) is a kind of solid waste by the production of alumina. Long-term storage of RM can occupy a large amount of land and cause serious pollution to soil, air and water. Alkali activated cementitious material (AACM) is a new type of green environmental protection material, which provides a new idea for the efficient use of RM. In this research, RM is thermally activated and mixed with ground granulated blast-furnace slag (GGBFS) and alkali activator to prepare AACM. In order to improve the performance of this AACM, the influence of activator content and type on the chemical shrinkage and mechanical property of the AACM were studied and discussed comprehensively. The obtained results show that the used RM shows best activity after calcined at 700 °C; the suitable ratio of RM to GGBFS is 5:5. Water glass has better activation effect on the AACM made with RM and GGBFS than calcium hydroxide (Ca(OH)2). But, the use of water glass and Ca(OH)2 together is more appropriate for this AACM. The strength of the AACM activated by 20 wt% Ca(OH)2 and 20 wt% water glass can reach 88 MPa at 120 days.
Preparation and performance of AACM with red mud and GGBFS: effectiveness of alkali activator
Mater Struct
Liu, Xiaomin (Autor:in) / Long, Yu (Autor:in) / Wu, Qingyong (Autor:in) / Yu, Zhuqing (Autor:in) / Shen, Xiaodong (Autor:in)
01.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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