Impact of Recycled Aggregates on Selected Physical and Mechanical Characteristics of Cement Concrete

Zieliński, Krzysztof

doi:10.1016/j.proeng.2017.02.157

Cited by 12 publications

(9 citation statements)

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“…The incorporation method of fibers affects the dispersion of fibers in the concrete. A reasonable incorporation method can make the fiber better dispersed in the concrete and reduce the mixing time [28]. The mainstream fiber incorporation methods are the fiber wrapping method and secondary mixing method, Li et al [29] compared the effect of the two incorporation methods on the compressive strength and damage of concrete, the mechanical properties of concrete using fiber wrapping method is better than those of secondary mixing method.…”

Section: Hfs-bfrs Production Processmentioning

confidence: 99%

Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design

Wang¹,

Yang²,

Yang³

et al. 2023

Journal of Renewable Materials

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In order to improve the comprehensive utilization rate of high fines sand (HFS) produced by the mine, full solid waste shotcrete (HFS-BFRS) was prepared with HFS as fine aggregate in cooperation with basalt fiber (BF). The strength growth characteristics of HFS-BFRS were analyzed. And the fitting equation of compressive strength growth characteristics of HFS-BFRS under the synergistic effect of multiple factors was given. And based on the orthogonal experimental method, the effects on the compressive strength, splitting tensile strength and flexural strength of HFS-BFRS under the action of different levels of influencing factors were investigated. The effect of three factors on the mechanical properties of HFS-BFRS, 3, and 28 d, respectively, was revealed by choosing the colloidal sand ratio (C/H), basalt fiber volume fraction (BF Vol) and naphthalene high-efficiency water reducing agent (FDN) as the design variables, combined with indoor tests and theoretical analysis. The results show that the sensitivity of the three factors on compressive strength and flexural strength is C/H > FDN > BF Vol, and splitting tensile strength is BF Vol > FDN > C/H. Finally, the fitting ratio of HFS-BFRS was optimized by the factor index method, and the rationality was verified by the field test. For the fluidity of HFS-BFRS, the slump can be improved by 139% under the action of 1.2% FDN, which guarantees the pump-ability of HFS-BFRS. KEYWORDSSolid wastes recycling; high-fine silt; basalt fiber; total solid waste shotcrete; orthogonal design Nomenclature HFSHigh-fine silt FDN Naphthalene high-efficiency water-reducing agent BF Basalt fiber

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Section: Hfs-bfrs Production Processmentioning

confidence: 99%

Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design

Wang¹,

Yang²,

Yang³

et al. 2023

Journal of Renewable Materials

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“…[21][22][23][24] To achieve the best mechanical properties of concrete, the optimum volume fraction of BF was suggested to range from 0.1% to 0.2%. 25,26 The above research focused on the properties of BF mixed concrete from the level of material, however, there has been merely limited research on the flexural behavior of steel-reinforced basalt FRC (RBFRC) beams. Alnahhal and Aljidda 27 investigated the flexural behavior of RBFRC beams with recycled concrete coarse aggregates.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical study of the flexural behavior of basalt fiber‐reinforced concrete beams

Guo

2023

Structural Concrete

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In this work, the theoretical model for predicting the flexural behavior of steel‐reinforced basalt fiber‐reinforced concrete (RBFRC) beams was developed and the results were experimentally validated. The experimental results presented two failure modes of the RBFRC beams including flexural failure and flexural‐shear failure. The load‐carrying capacity, deformation ability, and crack resistance of RBFRC beams failing in flexure can be significantly enhanced with the addition of chopped basalt fiber. To verify the theoretical model, the predicted results were compared with the experimental results of RBFRC beams, and the relative error between the two methods is very small. Based on the theoretical method, a parametric study was conducted to identify the influence of several crucial materials and structural parameters on the flexural behavior of RBFRC beams.

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“…For economic and ecological reasons, at the end of the last century in Europe, attempts were made to explain the problem of using building rubble as a building component. It was shown in [ 1 ] that the rubble from recycled masonry intended for the production of cement concrete should be precisely sorted. Despite the lower compressive strength, higher water absorption, and thus lower frost resistance of cement concrete containing aggregate derived from masonry, laboratory tests and experience in construction practice have clearly shown the suitability of recycled aggregate for the production of structural concrete also.…”

Section: Introductionmentioning

confidence: 99%

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

2021

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The reduction in natural resources and aspects of environmental protection necessitate alternative uses of waste materials in the area of construction. Recycling is also observed in road construction where mineral–cement emulsion (MCE) mixtures are applied. The MCE mix is a conglomerate that can be used to make the base layer in road pavement structures. MCE mixes contain reclaimed asphalt from old, degraded road surfaces, aggregate improving the gradation, asphalt emulsion, and cement as a binder. The use of these ingredients, especially cement, can cause shrinkage and cracks in road layers. The article presents selected issues related to the problem of cracking in MCE mixtures. The authors of the study focused on reducing the cracking phenomenon in MCE mixes by using an innovative cement binder with recycled materials. The innovative cement binder based on dusty by-products from cement plants also contributes to the optimization of the recycling process in road surfaces. The research was carried out in the field of stiffness, fatigue life, crack resistance, and shrinkage analysis of mineral–cement emulsion mixes. It was found that it was possible to reduce the stiffness and the cracking in MCE mixes. The use of innovative binders will positively affect the durability of road pavements.

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Impact of Recycled Aggregates on Selected Physical and Mechanical Characteristics of Cement Concrete

Cited by 12 publications

References 0 publications

Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design

Study on Mechanical Properties of High Fine Silty Basalt Fiber Shotcrete Based on Orthogonal Design

Experimental and analytical study of the flexural behavior of basalt fiber‐reinforced concrete beams

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled Road Pavement Materials

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