Mechanical properties and chloride permeability of green concrete mixed with fly ash and coal gangue

Wang, Yuanzhan; Tan, Yi; Wang, Yuchi; Liu, Chenxi

doi:10.1016/j.conbuildmat.2019.117166

Cited by 66 publications

(21 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates that the strength development of the concrete containing industrial solid wastes is higher than that of the control concrete at late age. It has been explained in several previous studies that the pozzolanic reaction of these industrial solid wastes could increase gradually with the increase of curing time and then result in an increased quantity of hydration products ( 23 , 24 ). These products lead to cross-linking hydrates and also contribute to a crack-free dense microstructure, thus promoting the development of mechanical strength ( 15 , 20 , 29 ).…”

Section: Resultsmentioning

confidence: 99%

“…Despite the achievements made previously, systematic study on the effect of various industrial solid wastes on concrete’s resistance to chloride penetration is relatively scarce ( 24 , 25 ). It is widely accepted that most deterioration processes of the concrete structure are caused by the chloride diffusion mechanism and then lead to the corrosion of reinforcing steel ( 26 , 27 ).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Properties and Durability of Sustainable Concrete Containing Various Industrial Solid Wastes

Zhang

Tang

et al. 2021

Transportation Research Record

View full text Add to dashboard Cite

Benefits of replacing ordinary Portland cement with industrial solid wastes are promising for reducing cement production and solving environmental problems associated with industrial solid wastes. In this study, an experimental investigation was conducted to evaluate the performance of sustainable concrete containing different industrial solid wastes (e.g., waste glass, coal gangue, fly ash, and slag), with the attention on the mechanical strength, chloride transport property, and pore structure characteristics. Three water to binder ratios (i.e., 0.38, 0.48, and 0.65) and three replacement levels (i.e., 10%, 20%, and 30%) were considered in this work. The test results show that regardless of the content and type of industrial solid wastes, the inclusion of industrial solid wastes generally exerts a negative influence on the mechanical properties, especially under high water to binder ratios. However, acceptable mechanical strength can still be achieved in these sustainable concretes. In addition, the inclusion of industrial solid wastes could enhance the chloride diffusion resistance of concrete, and also the concrete with waste glass powder showed the best performance. Furthermore, the incorporation of industrial solid wastes has a refinement effect on the microstructure of the matrix, manifesting as decreased cumulative pore volume and compacted microstructural morphology.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Mechanical Properties and Durability of Sustainable Concrete Containing Various Industrial Solid Wastes

Zhang

Tang

et al. 2021

Transportation Research Record

View full text Add to dashboard Cite

show abstract

“…For a long time, the technology of gangue backfilling mining has developed into an effective means to control the strata movement and surface subsidence and has been widely applied [11][12][13][14][15][16][17]. The gangue of the main component in filling body of goaf [18,19] is in a state of long-term pressure deformation, and its long-term bearing characteristics determine the stability of the overlying strata and filling effect of the goaf [20][21][22][23]. After the underground space is mined by filling, the filling body will face a complex geological environment.…”

Section: Introductionmentioning

confidence: 99%

Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf

Ning

Yin

et al. 2021

Geofluids

View full text Add to dashboard Cite

To study the long-term bearing characteristics of crushed gangue in goaf under water immersion conditions, the creep test of the crushed gangue in the water immersion state was performed by using the self-developed large-scale deformation-seepage test system of crushed rock. The effects of the rock lithology, axial stress, and grain composition on the long-term bearing deformation characteristics and fractal characteristics of crushed gangue under water immersion were analysed. The results show that under certain conditions of axial stress and grain composition of the gangue, a greater uniaxial compressive strength of water-saturated rock corresponds to a greater deformation resistance of the rock, smaller strain and crushing expansion in the corresponding creep stage, and greater fractal dimension increments of the crushed gangue after compression, and the gangue will have more serious crushing. With identical grain compositions and with the increase in the axial stress in the creep stage, the strain increases, the crushing expansion decreases, the fractal dimension increments of the crushed gangue after compression increase, and the gangue will have more serious crushing. Under identical axial stress conditions, when the Talbol power index n is 0.5, the differentials of the strain and crushing expansion for the crushed sandstone sample in the creep stage are minimal. When n is 0.3 or 0.7, these quantities are basically equal. With the increase in the Talbol power index, the fractal dimension increments of the crushed sandstone sample during compression gradually increase, and the crushed sandstone sample will have more serious crushing.

show abstract

“…The need for reducing energy consumption and CO 2 emission caused by cement production has become an increasingly important issue in recent years [1][2][3][4]. The use of mineral additives as clinker or as cement replacement should help in achieving environmental and economic advantages [5,6], and should also help in achieving the required technical performance [7,8].…”

Section: Introductionmentioning

confidence: 99%

Reactivity Effect of Calcium Carbonate on the Formation of Carboaluminate Phases in Ground Granulated Blast Furnace Slag Blended Cements

et al. 2021

View full text Add to dashboard Cite

The reactivity effect of calcium carbonate, present in ground oyster shells and limestone filler, on the formation of carboaluminate phases in ground granulated blast furnace slag blended cement pastes was reported in this paper. Six different binary and ternary blended cement pastes were prepared using ground granulated blast furnace slag, ground oyster shells and limestone filler with different replacement levels (from 5 to 35%). The carboaluminate formation was assessed and quantified directly using X-ray diffraction (XRD), and indirectly by following the aluminate phase’s reaction (heat flow) and consumed calcium carbonate using Isothermal Calorimetry (IC) and Thermogravimetric Analysis (TGA), respectively. Further, the overall reaction degree calculated based on TGA results and the compressive strength were determined to support the findings obtained. The results revealed that the calcium carbonate present in ground oyster shells is more reactive when compared to that present in limestone filler, where more formed hemi- and monocarboaluminate phases were observed in mixtures containing ground oyster shells. An enhancement in compressive strength and overall reaction degree was observed by adding 5% ground oyster shells as cement replacement.

show abstract

Mechanical properties and chloride permeability of green concrete mixed with fly ash and coal gangue

Cited by 66 publications

References 38 publications

Mechanical Properties and Durability of Sustainable Concrete Containing Various Industrial Solid Wastes

Mechanical Properties and Durability of Sustainable Concrete Containing Various Industrial Solid Wastes

Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf

Reactivity Effect of Calcium Carbonate on the Formation of Carboaluminate Phases in Ground Granulated Blast Furnace Slag Blended Cements

Contact Info

Product

Resources

About