Electrical percolation and fluidity of conductive recycled mortar cement: graphite powder: recycled sand with addition of industrial waste carbon fiber

다국어 초록 (Multilingual Abstract)

The use of recycled materials, such as the fne recycled aggregate made from concrete waste and carbon fber (CF) product of industrial waste, for the manufacture of conductive recycled mortars (CRM), transforms the mortar base cement normally made with cement:sand in a sustainable multifunctional material, conferring satisfactory mechanical and electrical properties for non-structural uses. This action provides ecological benefts, reducing the use of natural fne aggregates from rivers and the amount of concrete waste deposited in landflls resulting from construction waste. In this investigation the efect of the addition of CF on electrical properties in hardened, wet and dry state, electric percolation in dry state and fuidity of the wet mixture of a cement based CRM was evaluated: fne recycled aggregate: graphite powder, CRM specimens with dimensions of 4×4×16 cm. were manufactured for 3, 7 and 28 days of age and sand/cement ratios=1.00, graphite/cement=1.00, water/cement=0.60 and CF=0.1, 0.3, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0% compared to the weight of cement. The results demonstrated the efect of the addition of CF in CRM, reducing fuidity of the mixtures due to the opposition generated by its physical interaction of CF with recycled sand or recycled fne aggregate and graphite powder (GP), in its case, placing the electric percolation percolation at 0.30% and 0.45% of CF for CRM with and without GP, respectively. Increases in electrical conductivity (EC) without the presence of GP are defned by the contact between the CF and the conductive paths formed.
In contrast, with the presence of GP, the EC is defned by the contact between the CF and the GP simultaneously, forming conductive routes with greater performance in its EC.

참고문헌 (Reference)

1 Zhang B, "Thermal and mechanical properties of expanded graphite/paraffin gypsumbased composite material reinforced by carbon fiber" 11 : 2205-, 2018

2 Fan C-C, "The effects of different fine recycled concrete aggregates on the properties of mortar" 8 : 2658-2672, 2015

3 Yacoub A, "The effect of the drying temperature on water porosity and gas permeability of recycled sand mortar" 214 : 677-684, 2019

4 Sánchez de Juan M, "Study on the influence of attached mortar content on the properties of recycled concrete aggregate" 23 : 872-877, 2009

5 Wang T, "Study on the effects of carbon fibers and carbon nanofibers on electrical conductivity of concrete" 267 : 032011-, 2019

6 ASTM International, "Standard test method for flow of hydraulic cement mortar. ASTM C1437–13"

7 ASTM International, "Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. ASTM C 305–14"

8 Han B, "Reinforcement effect and mechanism of carbon fibers to mechanical and electrically conductive properties of cement-based materials" 125 : 479-489, 2016

9 Han B, "Reinforcement effect and mechanism of carbon fibers to mechanical" 125 : 479-489, 2016

10 Evangelista ACJ, "Recycled ceramic fine aggregate for masonry mortar production" 209889 : 1141-1148, 2018

11 Fan C-C, "Properties of concrete incorporating fine recycled aggregates from crushed concrete wastes" 112 : 708-715, 2016

12 Haghgoo M, "Prediction of electrical conductivity of carbon fiber-carbon nanotubereinforced polymer hybrid composites" 167 : 728-735, 2019

13 Morris W, "Practical evaluation of resistivity od concrete in test cylinders using a Wenner array probe" 26 (26): 1779-1787, 1996

14 Katz A, "Performance of mortars containing recycled fine aggregate from construction and demolition waste" 50 (50): 199-, 2017

15 M. J. Pellegrini-Cervantes, "Performance of carbon fiber added to anodes of conductive cement-graphite pastes used in electrochemical chloride extraction in concretes" 한국탄소학회 26 (26): 18-24, 2018

16 "Norma ASTM C 33–99a Standard specification for concrete aggregates"

17 "Norma ASTM C 136-06 Standard test method for sieve analysis of fine and coarse aggregates"

18 "Norma ASTM C 125–00 Standard terminology relating to concrete and concrete aggregates"

19 Xu J, "Nonlinear conduction in carbon fiber reinforced cement mortar" 33 : 444-448, 2011

20 Wanga H, "Multi-functional properties of carbon nanofiber reinforced reactive powder concrete" 187 : 699-707, 2018

21 Garzon AJ, "Modification of four point method to measure the concrete electricalresistivity in presence of reinforcing bars" 53 : 249-257, 2014

22 Duarte G, "Mechanical performance of shotcrete produced with recycled coarse aggregates from concrete" 210 : 696-708, 2019

23 Graham RK, "Laboratory evaluation of tensile strength and energy absorbing properties of cement mortar reinforced with micro-and meso-sized carbon fibers" 44 (44): 751-756, 2013

24 Wang D, "Investigation on the poor fluidity of electrically conductive cement-graphite paste : experiment and simulation" 169 : 107679-, 2019

25 Yue Geng, "Influence of service time of recycled coarse aggregate on the mechanical properties of recycled aggregate concrete" Springer Science and Business Media LLC 52 (52): 2019

26 Cuenca-Moyano GM, "Influence of pre-soaked recycled fine aggregate on the properties of masonry mortar" 70 : 71-79, 2014

27 Felekoglu B, "Influence of matrix flowability, fiber mixing procedure, and curing conditions on the mechanical performance of HTPP-ECC" 60 (60): 359-370, 2014

28 Zhao Z, "Influence of fine recycled concrete aggregates on the properties of mortars" 81 : 179-186, 2015

29 Mardani-Aghabaglou A, "Improving the mechanical and durability performance of recycled concrete aggregate-bearing mortar mixtures by using binary and ternary cementitious systems" 196 : 295-306, 2019

30 Shu X, "Hybrid effects of carbon fibers on mechanical properties of Portland cement mortar" 65 (65): 1222-1228, 2015

31 Li M, "Hybrid effect of calcium carbonate whisker and carbon fiber on the mechanical properties and microstructure of oil well cement" 93 : 995-1002, 2015

32 Lee C-H, "Evaluation of pre-coated recycled concrete aggregate for hot mix asphalt" 28 (28): 66-71, 2012

33 Jin Z, "Electrochemical chloride extraction(ECE)based on the high performance conductive cement-based composite anode" 173 : 149-159, 2018

34 Yoo D-Y, "Electrical and piezoresistive sensing capacities of cement paste with multi-walled carbon nanotubes" 18 : 371-384, 2018

35 Wei J, "Effect of moisture on the thermoelectric properties in expanded graphite/carbon fiber cement composites" 43 (43): 10763-10769, 2017

36 Akkaya Y, "Effect of fiber dispersión on multiple cracking of cement composites" 127 (127): 311-316, 2001

37 Wang C, "Effect of carbon fiber dispersion on the mechanical properties of carbon fiber-reinforced cement-based composites" 487 : 52-57, 2008

38 Garcés P, "Durabilidad y características resistentes de conglomerados cementicios conductores" 2008

39 Wen S, "Double percolation in the electrical conduction in carbon fiber reinforced cement-based materials" 45 : 263-267, 2007

40 Gao J, "Dispersion of carbon fibers in cement-based composites with different mixing methods" 134 : 220-227, 2017

41 Chen B, "Conductivity of carbon fiber reinforced cement-based composites" 26 : 291-297, 2004

42 Chen B, "Conductivity of carbon fiber reinforced cement-based composites" 26 (26): 291-297, 2004

43 He Y, "Conductive aggregate prepared using graphite and clay and its use in conductive mortar" 53 : 131-137, 2014

44 Le MT, "Christelle tribout y gilles escadeillas, durability of mortars with leftover recycled sand" 215 : 391-400, 2019

45 Chung DDL, "Carbon composites" Butterworth-Heinemann 88-160, 2017

46 Zhang Y, "A review of life cycle assessment of recycled aggregate concrete" 209 : 115-125, 2019