Tentative application of expansive cementitious materials in grouting – A systematic review

Oppong, Felix; Yao, Nan; Zhang, Wenhao; Liu, Yiding; Kolawole, Oladoyin

doi:10.1016/j.cscm.2023.e02113

Cited by 6 publications

(2 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the early hydration process, Ca 2+ , Mg 2+ , and a large amount of OH − are produced, which makes the pH of the whole system rise rapidly, accelerates the dissolution of silicate and aluminate on the surface of fly ash particles, and forms a plasma liquid phase reaction system. Hydration products such as Ca(OH) 2 and C-S-H gel are generated through the interaction between ions, which contributes to the hydration reaction of cement, and also stimulates the pozzolanic reactivity of fly ash [47,48].…”

Section: Mechanical Propertymentioning

confidence: 99%

A Preliminary Study on the Improvement of Gangue/Tailing Cemented Fill by Bentonite: Flow Properties, Mechanical Properties and Permeability

Wang,

Chen,

Guo

et al. 2023

Materials

View full text Add to dashboard Cite

Backfill mining has significant advantages in safe mining, solid waste utilization and ecological environmental protection, but solid waste materials (tailings, gangue and coal gasification slag, etc.), as derivative residues of the chemical and metallurgical industries, contain a large number of heavy metal elements, which is posing great challenges to the underground environment after backfill. In order to study the feasibility of bentonite for reducing the permeability of gangue/tailing sand cemented backfill body, relevant tests were carried out from the basic performance index, flow performance and mechanical properties of paste backfill materials. The test results show that bentonite has a significant effect on the water secretion rate of cemented fillers, and also promotes the improvement of slump and diffusion diameter of backfill slurry. The enhancement effect of mechanical properties in the early stage is not obvious, mainly concentrated in the middle and late stages of specimen curing. With the increase of bentonite content, the 28-day uniaxial compressive strength increased from 7.1 MPa and 7.9 MPa to 8.7 MPa and 9.0 MPa, respectively. Bentonite is filled between the pores of the cemented backfill with its fine particles and water swelling, which can reduce the porosity and permeability of the gangue and tailings cemented backfill. Therefore, on the premise of satisfying the flow and mechanical properties of paste backfill, bentonite can be used to improve the permeability of cemented backfill and reduce the leaching and migration of heavy metal ions.

show abstract

Section: Mechanical Propertymentioning

confidence: 99%

A Preliminary Study on the Improvement of Gangue/Tailing Cemented Fill by Bentonite: Flow Properties, Mechanical Properties and Permeability

Wang,

Chen,

Guo

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…However, how to use ground penetrating radar and a high-density electrometer to evaluate the grouting effect after polyurethane composite materials' grouting deserves our exploration and study. Researchers modified asphalt by adding polymers to improve the road performance of asphalt [19][20][21]. After the use of rubber as an asphalt modifier, more and more polymers have been used in the field of modified asphalt [22][23][24][25] whose properties are different, and their modification effects on asphalt are different.…”

Section: Introductionmentioning

confidence: 99%

Grouting Mechanism of Polyurethane Composite Materials in Asphalt Pavement Subsidence

Ran,

Zhou,

Yan

et al. 2023

Materials

View full text Add to dashboard Cite

The mechanical properties of polyurethane grouting materials were significantly improved when cement, sodium meta-silicate, red mud, slag, and fly ash were added. However, the grouting mechanisms of polyurethane composite materials are not clear. The grouting mechanisms of polyurethane composite materials in asphalt pavement subsidence were investigated. The results of computed tomography analysis show that polyurethane foam is filled with geopolymer hydration products. The results from ground penetrating radar after grouting show that mapping has no significant fluctuation or dislocation effect, which indicates that the grouting effect is strong. The high-density electrometer can also test the pavement subsidence place and distribution. The grouting mechanisms indicate that polyurethane foam acts as the consolidation structure, and the geopolymer filled with the foam pores of polyurethane and geopolymer forms a stable consolidated body. The seriflux includes under-layer seriflux (red mud, slag, water, and polyurethane composite materials) and upper-layer seriflux (polyurethane seriflux), and there exists a weak phase separation phenomenon, in which the separation phase is mainly polyurethane with little red mud-based geopolymer.

show abstract

A state-of-the-art review on delayed expansion of cemented paste backfill materials

Li,

Guo,

Zhao

et al. 2024

Rare Met.

View full text Add to dashboard Cite

Tentative application of expansive cementitious materials in grouting – A systematic review

Cited by 6 publications

References 85 publications

A Preliminary Study on the Improvement of Gangue/Tailing Cemented Fill by Bentonite: Flow Properties, Mechanical Properties and Permeability

A Preliminary Study on the Improvement of Gangue/Tailing Cemented Fill by Bentonite: Flow Properties, Mechanical Properties and Permeability

Grouting Mechanism of Polyurethane Composite Materials in Asphalt Pavement Subsidence

A state-of-the-art review on delayed expansion of cemented paste backfill materials

Contact Info

Product

Resources

About