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

Pan, Zengxi; Li, Dongxu; Yu, Jian; Yang, Ning

doi:10.1016/s0008-8846(03)00093-0

Cited by 132 publications

(35 citation statements)

References 2 publications

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“…For the reason, red mud is reported to be capable of replacing conventional soil pavement with sufficient quality (Liu et al 2011;David et al 2017;Kang 2016). Another effort for utilizing red mud as an activator has been made for alkali slag red mud cement in the construction industry, which is so called clinker-free cement (Gonga and Yang 2000;Pan et al 2002Pan et al , 2003. On the other hand, several studies have been carried out for the use of a powdery industrial byproduct as a replacement for expensive liquid activator (Kang 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of Red Mud Content on Strength and Efflorescence in Pavement using Alkali-Activated Slag Cement

Kim

Kang

Choe

2018

Int J Concr Struct Mater

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Efflorescence which severely occurs in alkali-activated slag cement can cause reduction of strength and durability due to calcium leaching. In the work, efflorescence characteristics in pavement containing red mud which can be affected by strong alkaline were investigated through various tests such as compressive strength, porosity, absorption, efflorescence area, alkali leaching content, and properties of the efflorescence compound. The compressive strength of pavement was evaluated to be higher over 15.0 MPa in all cases regardless of replacement ratio of red-mud and binder type, which can provide a reasonable strength for walking and bike lanes. The pavement with red mud was applicable to parking lots only when the replacement ratio of red-mud is within 10%. The efflorescence area increased with a higher replacement ratio of red mud and its propagation appeared though the efflorescence was removed through evaporation of moisture. However, the area of efflorescence gradually decreased with the repetition of the test.

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Section: Introductionmentioning

confidence: 99%

Effect of Red Mud Content on Strength and Efflorescence in Pavement using Alkali-Activated Slag Cement

Kim

Kang

Choe

2018

Int J Concr Struct Mater

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“…Thus, a number of efforts have been made in order to find possible applications for this material, as for example, as catalysts materials 10 , fillers in PVC 11 , pigment 12 , for the recovery of some valuable elements 13 , cements manufacturing 8,[14][15][16] , water treatment 17,18 , among others. Unfortunately, several reuse techniques consume relatively small amounts of waste compared to the huge amount produced.…”

Section: Introductionmentioning

confidence: 99%

Application of bauxite waste from amazon region in the heavy clay industry

et al. 2013

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In this work, a method was developed for the application of red mud, an alkaline leaching waste, from a bauxite processing plant located in northern Brazil (Amazon region) as starting material for heavy clay products. Samples were prepared by pressing blends of red mud and clay, which were then fired at temperatures from 900 °C to 1190 °C. Characterization was carried out by chemical analysis, differential thermal analysis (DTA) and X-ray diffraction (XRD), and the following ceramic properties were evaluated: water absorption, linear shrinkage and flexural strength. In order to evaluate the Na + stability in the dense ceramic, leaching tests were also carried out on the specimens after sintering process. Results indicated that samples with 50 and 70 wt% of red mud are proper for being used in the production of ceramic bodies, due to its excellent properties, mainly high mechanical resistance and low water absorption, showing thus, an option to minimizing the environmental impacts caused by the aluminum industry.

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“…Hence red mud and some neutralized forms have been investigated and used to treat acid mine drainage (AMD), acidic sediments and soils, industrial effluents; and as a landfill covers, odour reducers, catalysts, road base, fertilizer filler, permeable reactive barriers, clay capping, ceramics, geo-polymers, construction materials and synthetic soils [9,14,15,[17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%