Preparation and characterization of cement treated road base material utilizing electrolytic manganese residue

Zhang, Yuliang; Liu, Xiaoming; Xu, Yingtang; Tang, Binwen; Wang, Yaguang; Mukiza, Emile

doi:10.1016/j.jclepro.2019.05.352

Cited by 85 publications

(18 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorption peaks at 3643 cm −1 and 1637 cm −1 indicate the telescopic and free-water bending vibrations of Ca(OH) 2 , respectively [ 21 ]. The absorption peaks of Tailings-cement at 3644 cm −1 and 1643 cm −1 weaken, implying that more Ca(OH) 2 is involved in the hydration reaction, and more free water is changed to bound water during the reaction.…”

Section: Resultsmentioning

confidence: 99%

“…The MIP results are shown in Table 5 . It is generally believed that in cementitious materials, the pores that are larger than 1 um are harmful, and cementitious materials with fewer harmful pores have higher mechanical properties [ 18 , 19 , 20 , 21 , 22 ]. It is obvious that the Tailings-cement owns fewer harmful pores, and the CBRM-cement takes the second place.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Wang

Liu

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

Bayer red mud (BRM) is a kind of solid waste with high hematite content, and its effective utilization is difficult due to the special physicochemical properties. In this work, Fe2O3 in BRM was reduced to Fe3O4 by biomass, and iron concentrate and high activity tailings were obtained after magnetic separation. The pozzolanic activity and hydration characteristics of the tailings were systematically studied. The results showed that the relatively stable polymerization structures of Si-O and Al-O in BRM are destroyed under the effect of biomass reduction at 650 °C, and some fracture bonds and activation points are formed in the structures. The aluminosilicate phases in the BRM were easy to transform into the active substances of Si and Al. The pozzolanic activity of tailings is greatly improved, and its pozzolanic activity index is 91%. High polymerization degree of gel and ettringite are formed since more active substances and alkali in the tailings promote the hydration reaction of cement-based cementitious materials, which made cementitious materials have dense matrix, good mechanical properties, and environmental performance. This work has realized the full quantitative utilization of BRM and provided a feasible way for the resource utilization of BRM.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Wang

Liu

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…8 shows the main crystal image composition of coral sand was CaCO3 (PDF•#41-1475) and calcium silicate (PDF •# 27-0088), so it has strong neutralization performance. The main crystal images of S1 were CaCO3, CaAl2Si2O8•4H2O (PDF •# 20-0452) [16] and SiO2 (PDF •# 46-1045). CaAl2Si2O8•4H2O is the main component of anorthite.…”

Section: Properties and Reaction Mechanismmentioning

confidence: 99%

Coral sand from hydraulic reclamation for the remediation of acid sulfate soil

Zeng¹,

Hao²,

Sun³

et al. 2021

E3S Web Conf.

View full text Add to dashboard Cite

For the first time, Coral sand, as the main geotechnical material in reclamation, has the characteristics of loose and porous structure, relatively small volume and mass, easy to break and high compression, and high calcium carbonate, which may be a natural material to control acid release of acid soil. In this paper, by studying the neutralization effect of coral sand under different sand ratio, particle size and adding methods, the optimal dosage and particle size of coral sand and the adding sequence were determined under typical acid soil conditions; The neutralization performance of different neutralizing materials was compared through internal structure characterization, and the structural advantages of coral sand were explored. The results show that the specific surface area of coral sand was 1.2361m2g-1, second only to calcite and shell powder. The particles were evenly distributed and can fully react with sulfuric acid to produce CaSO4 precipitation. When the addition of coral sand was 9% (Ca: S = 18:5), the PASS can be neutralized to pH > 6.5. The PASS neutralization ability of coral sand was related to particle size. The overall trend was that the smaller the particle size, the stronger the neutralization ability. The best effect was at 0.15mm, when the particle size exceeded 0.27mm, the neutralization ability began to decline.

show abstract

“…Furthermore, its environmental risks would be effectively addressed by the construction material curing process [ 13 , 14 , 15 , 16 ]. Once the strength of the specimen with LRT added reaches the limit of the MU15 class construction standard (the compressive strength is 15MPa after 28 days curing process), it can be reused as foundations and other buildings [ 17 ]. In the mining area, there are varied and huge demands for this material, such as the reclamation of the tailings impoundments, the hardening of the mining area, and the filling for mining wells.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Toxicity Risks of Lead-Zinc Sulfide Tailing-Based Construction Materials

et al. 2021

View full text Add to dashboard Cite

The leaching residue of the lead–zinc sulfide tailing (LRT) is the only residue generated from the tailing leaching recovery process; it is a typical hazardous material for its high heavy-metal contents and high acidity. Due to the large output of LRT, and because its main components are Ca, Si, and Al, the preparation of building construction materials with LRT was studied. The results showed that when the LRT addition is less than 47%, with the ordinary Portland cement (OPC) and fly ash (FA) added and the curing conditions appropriate, the strength values of the tested specimens meet the M15 Class of the autoclaved lime sand brick standard (GB/T 16753-1997). The carbonization coefficient and drying shrinkage of the specimen were 0.79 and smaller than 0.42, respectively. As the SEM, TG, and XRD analysis have shown, the LRT can chemically react with additives to form stable minerals. The heavy metal contents that were leached out well met the limits in GB5085.3-2007. Based on the high addition of the LRT, the good strength and lower heavy metals were leached out of the prepared test specimen, and the tailing could be reused completely with the leaching recovery and the LRT reuse process. LRT can be used to replace OPC, allowing more sustainable concrete production and improved ecological properties of LRT.

show abstract

Preparation and characterization of cement treated road base material utilizing electrolytic manganese residue

Cited by 85 publications

References 27 publications

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Tailings after Iron Extraction in Bayer Red Mud by Biomass Reduction: Pozzolanic Activity and Hydration Characteristics

Coral sand from hydraulic reclamation for the remediation of acid sulfate soil

Mechanical Properties and Toxicity Risks of Lead-Zinc Sulfide Tailing-Based Construction Materials

Contact Info

Product

Resources

About