Red mud-metakaolin based cementitious material for remediation of arsenic pollution: Stabilization mechanism and leaching behavior of arsenic in lollingite

2021 ◽  
Vol 300 ◽  
pp. 113715
Author(s):  
Xian Zhou ◽  
Zheng-fu Zhang ◽  
Hui Yang ◽  
Chong-jun Bao ◽  
Jing-song Wang ◽  
...  
Keyword(s):  
Red Mud ◽  
Cementitious Material ◽  
Arsenic Pollution ◽  
Leaching Behavior ◽  
Stabilization Mechanism

Properties and microstructure of the hardened alkali-activated red mud–slag cementitious material

2003 ◽  
Vol 33 (9) ◽  
pp. 1437-1441 ◽  
Author(s):  
Zhihua Pan ◽  
Dongxu Li ◽  
Jian Yu ◽  
Nanru Yang
Keyword(s):  
Red Mud ◽  
Cementitious Material ◽  
Alkali Activated

Utilization of red mud, slag and waste drilling fluid for the synthesis of slag-red mud cementitious material

2019 ◽  
Vol 238 ◽  
pp. 117902 ◽  
Author(s):  
Xiaowei Cheng ◽  
Dan Long ◽  
Chi Zhang ◽  
Xianshu Gao ◽  
Yongjin Yu ◽  
...  
Keyword(s):  
Red Mud ◽  
Drilling Fluid ◽  
Cementitious Material

Effect of Red Mud on Mechanical Properties of Loess–Containing Aluminosilicate Based Cementitious Materials

2009 ◽  
Vol 610-613 ◽  
pp. 155-160
Author(s):  
Jian Hua Wan ◽  
Heng Hu Sun ◽  
Ying Ying Wang ◽  
Chao Li
Keyword(s):  
Mechanical Properties ◽  
Red Mud ◽  
Cementitious Materials ◽  
Cementitious Material ◽  
The Other ◽  
Term Strength ◽  
Other Hand ◽  
Early Strength ◽  
The One

The effect of the thermal treated red mud on mechanical properties of loess –containing aluminosilicate based cementitious materials is investigated. And the characteristic of hydration production is tested using XRD, SEM and EDAX methods. The results show that the thermal treated red mud not only has excellent cementitious properties but also can improve the mechanical properties of loess –containing aluminosilicate based cementitious materials. Moreover when the content of red mud is 5%, the improved effect is optimal. On the one hand, the alkaline ingredients of red mud can promote abundant ettringites to produce at early ages. And the ettringites contribute to early strength of the cementitious material. On the other hand, the content of red mud is too high to improve the long-term strength.

scholarly journals Solidification performances of contaminants by red mud-based cementitious paste filling material and leaching behavior of contaminants in different pH and redox potential environments

2022 ◽  
Author(s):  
Yue Zhao ◽  
Yun Zhang ◽  
Zhihuai Zhao ◽  
Xuefeng Ma ◽  
Yun Cai
Keyword(s):  
Redox Potential ◽  
Red Mud ◽  
Treatment Effectiveness ◽  
Alkali Activation ◽  
Comprehensive Treatment ◽  
Filling Material ◽  
Test Results ◽  
Leaching Behavior ◽  
Forming Process ◽  
Secondary Pollution

Abstract Considering the urgent need for disposal of red mud and the comprehensive treatment of coal mined-out areas, this paper presented red mud-based cementitious paste filling material (RMFM) to achieve the purpose of green filling treatment. However, the solidification performance of alkaline RMFM for contaminants can be affected when in contact with acid goaf water in practice, which may in turn causes secondary pollution to the surroundings. The leaching tests of RMFM under different pH and redox potential (Eh) conditions were designed to investigate the effects of environmental elements on the solidification performance of RMFM, and primarily investigated the treatment effectiveness of RMFM on goaf water. The test results manifest that the acidic and oxidizing environments could damage the hydration products generated by alkali and sulfate activation, thus affecting the solidification performance, while the alkaline and reducing environments could effectively prevent the release of the contaminants by enhancing the degree of alkali activation and inhibiting oxidation acid forming process. In the possible exposure environment, RMFM could effectively stabilize its own pollutants without secondary pollution. In addition, the powder RMFM samples had significant removal effects on heavy metals, the values of Cu, Pb, and As removal efficiency all reached more than 96.15%.

Hydration products of alkali-activated slag–red mud cementitious material

2002 ◽  
Vol 32 (3) ◽  
pp. 357-362 ◽  
Author(s):  
Zhihua Pan ◽  
Lin Cheng ◽  
Yinong Lu ◽  
Nanru Yang
Keyword(s):  
Red Mud ◽  
Cementitious Material ◽  
Hydration Products ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

Copper slag: The leaching behavior of heavy metals and its applicability as a supplementary cementitious material

2021 ◽  
Vol 9 (2) ◽  
pp. 105132
Author(s):  
Rongxing He ◽  
Shiyu Zhang ◽  
Xiaolong Zhang ◽  
Zhaohao Zhang ◽  
Yingliang Zhao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Copper Slag ◽  
Cementitious Material ◽  
Leaching Behavior ◽  
Supplementary Cementitious Material

scholarly journals Influence of red mud and waste glass on the microstructure, strength, and leaching behavior of bottom ash-based geopolymer composites

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Constantin Bobirică ◽  
Cristina Orbeci ◽  
Liliana Bobirică ◽  
Petru Palade ◽  
Călin Deleanu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Red Mud ◽  
Spectroscopic Analysis ◽  
Bottom Ash ◽  
Waste Glass ◽  
Leaching Tests ◽  
Leaching Behavior ◽  
Constant Amount ◽  
Alternative Source ◽  
Geopolymer Composites

AbstractThe influence of waste glass and red mud addition as alternative source of aluminosilicate precursors on the microstructural, mechanical, and leaching properties of bottom ash-based geopolymer was studied in this work through mineralogical, morphological, and spectroscopic analysis, as well as by conducting compressive strength and leaching tests. The bottom ash-based geopolymer composites were synthesized by adding a constant amount of waste glass (10% by weight) and increasing amounts of red mud (up to 30% by weight). The results derived from FTIR, 29Si and 27Al MAS NMR, and SEM–EDX revealed that adding up to 10% (by weight) red mud to the synthesis mixes leads to an increase in the degree of geopolymerization of the activated mixes. The compressive strength followed the same trend. An increase of more than 10% (by weight) red mud added to the synthesis mixes results in a significant decrease of compressive strength of the geopolymer composites. A low leachability of geopolymer composites in regard with their contaminants was revealed especially for those with good compressive strength.

Effect of oil shale on Na+ solidification of red mud-fly ash cementitious material

2012 ◽  
Vol 17 (6) ◽  
pp. 723-729
Author(s):  
Xiao-ming Liu ◽  
Yu Li ◽  
Heng-hu Sun ◽  
Da-qiang Cang
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Oil Shale ◽  
Cementitious Material
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