TY - JOUR
T1 - Preparation and performance of AACM with red mud and GGBFS
T2 - effectiveness of alkali activator
AU - Liu, Xiaomin
AU - Long, Yu
AU - Wu, Qingyong
AU - Yu, Zhuqing
AU - Shen, Xiaodong
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive licence to RILEM.
PY - 2023/5
Y1 - 2023/5
N2 - 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.
AB - 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.
KW - Alkali activated cementitious materials
KW - Bayer red mud
KW - Chemical shrinkage
KW - Compressive strength
UR - http://www.scopus.com/inward/record.url?scp=85159034985&partnerID=8YFLogxK
U2 - 10.1617/s11527-023-02178-w
DO - 10.1617/s11527-023-02178-w
M3 - 文章
AN - SCOPUS:85159034985
SN - 1359-5997
VL - 56
JO - Materials and Structures/Materiaux et Constructions
JF - Materials and Structures/Materiaux et Constructions
IS - 4
M1 - 88
ER -
