The Characteristics of Recycled Concrete Powder and Its Influences on the Properties of Cement-based Materials

Abstract

To guarantee the efficient and high-value reutilization of waste concrete from construction waste, the waste concrete was mechanically ground, and three degrees of fineness recycled concrete powder (RCP) were obtained by different grinding time. By analyzing the particle characteristics of RCP with different fineness, the filling-densification effect of cement-RCP cementitious material system was quantitatively investigated based on Andreasen, Fuller, and Aim-Goff models. In addition, the macroscopic mechanical properties of cement paste mixed with RCP were studied, and the influencing mechanisms of RCP on the microstructure of cement paste was revealed. Macroscopic research results show that the particle fineness of RCP after grinding is smaller than that of cement. When the RCP replaces 0% to 20% cement, the packing density based on the Aim-Goff model increases with the increase of RCP content, whereas the macro-mechanical properties first improve and then degrade with the increase of RCP content. Microscopic results show that at 5% RCP content, beneficial hydration products such as C-S-H and beneficial pore increase in cement-RCP paste; while at >15% content, beneficial products decrease and harmful substances such as Ca(OH)₂ and harmful pore increases. These research findings suggest that the incorporation of RCP can make the cementitious system denser, and the appropriate RCP content can improve the macro- and microscopic properties of cement-based materials.

References

[1] XiaoJ, MaZ, SuiT, et al.. Mechanical Properties of Concrete Mixed With Recycled Powder Produced from Construction and Demolition Waste[J]. J. Clean. Prod., 2018, 188: 720-188 731

[2] Li Z, Liu JP, Qiao M, et al. Mechanism of Viscosity for Recycled Powder-Cement Paste Based on the Adsorption of Super Plasticizer[J]. Materials Review, 2023(08): 1–14

[3] WeiJS. Discussion on the Current Situation of Resource Utilization of Construction Waste and Improvement Measures[J]. Low Carbon World, 2020, 10(06): 5374

[4] ShuHY. Research on Resourceful Disposal and Comprehensive Utilization of Construction Waste[J]. Low Carbon World, 2021, 11(12): 19-20

[5] ZhaoSY, LiY, KangXM, et al.. Experimental Study on Frost Resistance of Recycled Micronized Concrete[J]. Industrial Building, 2020, 50(11): 112-11896

[6] PengS, ChenH, ShuiZH, et al.. Performance Study of Ultra-High Performance Concrete Matrix Prepared from Recycled Waste Concrete Powder[J]. Silicate Bulletin, 2019, 38(07): 2125-2130

[7] Chen JL. Resource Utilization and Recycling Process of Construction Waste[J]. Concrete World, 2010(09): 44–49

[8] WuJ, ZhangY, ZhuP, et al.. Mechanical Properties and ITZ Microstructure of Recycled Aggregate Concrete Using Carbonated Recycled Coarse Aggregate[J]. J.Wuhan Univ. Technol.-Mater. Sci. Ed., 2018, 33(3): 648-653

[9] XiaoJZ, ChenXL, LiB, et al.. Effect of Compounding of Nano-SiO₂ and Fly Ash on the Properties of Recycled Concrete[J]. J.Build.Sci. Eng., 2020, 37(01): 26-32

[10] SalahuddinH, QureshiAL, NawazA, et al.. Effect of Recycled Fine Aggregates on Performance of Reactive Powder Concrete[J]. Constr. Build. Mater., 2020, 243: 118223-118223

[11] KwonE, AhnJ, ChoB, et al.. A Study on Development of Recycled Cement Made from Waste Cementitious Powder[J]. Constr. Build. Mater., 2015, 83: 174-180

[12] Oksri-NelfiaL, MahieuxPY, et al.. Reuse of Recycled Crushed Concrete Fines as Mineral Addition in Cementitious Materials[J]. Mater. Struc., 2016, 49(8): 3239-3251

[13] FilhoRDT, GonçalvesJP, AmericanoB B, et al.. Potential for Use of Crushed Waste Calcined-Clay Brick As a Supplementary Cementitious Material in Brazil[J]. Cem. Concr. Res., 2007, 37(9): 1357-1365

[14] ChangZWResearch on the Evaluation Method of Activity of Recycled Micronized Powder from Waste Concrete, 2022, Hefei, Hefei University of Technology[D]

[15] HeB, XieM, JiangZ, et al.. Temperature Field Distribution and Microstructure of Cement-Based Materials Under Cryogenic Freeze-Thaw Cycles[J]. Constr.Build.Mater., 2020, 243: 118256-118256

[16] JiangZ, HeB, ZhuX, et al.. State of the Art Review on Properties Evolution and Deterioration Mechanism of Concrete at Cryogenic Temperature[J]. Constr. Build. Mater., 2020, 257: 119456-119456

[17] Li S, Gao J, Li Q, et al. Investigation of Using Recycled Powder from the Preparation of Recycled Aggregate as A Supplementary Cementitious Material[J]. Constr. Build. Mater., 2020, (prepublish): 120 976–120 990

[18] LiuQ, TongT, LiuS, et al.. Investigation of Using Hybrid Recycled Powder from Demolished Concrete Solids and Clay Bricks as a Pozzolanic Supplement for Cement[J]. Constr. Build. Mater., 2014, 73: 754-763

[19] TangQ, MaZ, WuH, et al.. The Utilization of Eco-Friendly Recycled Powder from Concrete and Brick Waste in New Concrete: A Critical Review[J]. Cem. Concr. Compos., 2020, 114(prepublish): 103807-103831

[20] Hao WX, Zhang X. Characteristics of Fly Ash Particle Groups and Their Relationship with Cementitious Sand Properties[J]. J. Build. Mater., 2005(03): 244–249

[21] Lu DF, Chen SF, Wu JQ, et al. Gray System for The Effect of Slag Powder Particle Distribution on The Properties of Cementitious Materials[J]. J. South China Univ. Techn. (Natur. Sci. Ed.), 2003(01): 30–32+37

[22] Wang X, Zhuo JD, Ji HW, et al. Research on the Effect of Particle Grade Matching on the Performance of High Dosed Fly Ash Dry-Mixed Mortar[J]. Silic. Bulle., 2018(06): 1 877–1 880

[23] VryBF, PomaricoW, FerraOF, et al.. Dry Aggregate Particle Size Distribution Optimization for Soderberg Anode Paste Production Applied to Aluminum Industry[J]. Mater. Sci. Forum, 2014, 3692(802–802): 291-296

[24] QiuHFResearch on the Properties of Composite Mineral Admixture for Concrete, 2012, Harbin, Harbin Institute of Technology[D]

[25] ZhangHL, WangSL, YuanXS. Durability Analysis of Concrete Based on Nuclear Magnetic Resonance and Ultrasonic Flaw Detection Techniques[J]. J. Mater. Sci. Eng., 2022, 40(01): 40-4596

[26] LiuJ, ShiC, FarzadniaN, et al.. Effects of Pretreated Fine Lightweight Aggregate on Shrinkage and Pore Structure of Ultra-High Strength Concrete[J]. Constr. Build.Mater., 2019, 204: 276-287

RIGHTS & PERMISSIONS

Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature