Electrometalurgia y Reciclaje de Materiales. Otros …...Recycled structural self-compacting precast...
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Recycled structural self-compacting precast concrete elements as example of sustainability in the precast industry C. Thomas 1,* , J. A. Polanco 1 , J. M. Manso 2 , F. Fiol 3 1 LADICIM, University of Cantabria, School of Civil Engineering of Santander. Avda. Los Castros s/n, Santander, 39005 Spain. 2 Civil Engeneering Dep., University of Burgos, C/ Villadiego S/N, 09004 Burgos, Spain. [email protected] 3 Architectural Buildings Dep., University of Burgos, C/ Villadiego S/N, 09004 Burgos, Spain. [email protected] * [email protected] Acknowledgements: We would like to thank the company “ARTEPREF” of the group “Gerardo de la Calle” of Aranda de Duero (Spain) for the support. STUDIED MATERIAL In this research, recycled aggregates coming from concrete precast components are used as aggregate for new self-compacting concretes. First crushing Self compacting concret fabrication Four different mixtures were studied. A control mixture and incorporation three degrees of recycled coarse aggregate. Mix prop. [kg] Sand 0-2 Gravel 2-12.5 RA 2-12.5 Filler Cement w/c HR-45-0% 650 1150 0 270 320 0.35 HR-45-20% 650 920 230 270 320 0.35 HR-45-50% 650 575 575 270 320 0.35 HR-45-100% 650 0 1150 270 320 0.35 Production process of the recycled aggregate on site. PRECAST PLANT MIXING PROCESS The industrial test was performed using a 3 cubic meter industrial mixer. INTRODUCTION High amounts of good quality concrete wastes in a precast plant: use of recycled aggregate in new self-compacting recycled concretes. CONCLUSIONS The recycled aggregates of a precast plant are high quality and can be used into self-compacting concrete precast elements. However, the observed losses of mechanical properties are proportional to the degree of substitution but very small in the case of percentages below 20% of recycled aggregate. 9th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials, “WASCON 2015-Resource Efficiency in Construction” , Santander, Spain, 10-12 June 2015 Comparison of the behavior of a beam made with 100% recycled aggregate and a natural aggregate beam, both concretes with 45 MPa. Mixing process using the equipment of the precast factory. Three points and shear testing on a reinforced recycled beam performed on the laboratory. INDUSTRIAL TESTING RESULTS LABORATORY MIXING PROCESS WASCON 2015 Resource Efficiency in Construction Discarted elements of concrete Laboratory testing Weighting of recycled self-compacting concrete componentes. Pre-saturation of the recycled aggregate. Mixing in a vertical laboratory mixer. Filling of the molds for industrial beams and the test speciment molds. -158000 -184582,94 -280000 -260000 -240000 -220000 -200000 -180000 -160000 -140000 -120000 -100000 -80000 -60000 -40000 -20000 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 Force (N) Flexural test on a beam Recycled aggregate concrete reinforced beam (HR45) Natural aggregate concrete reinforced beam (HR45) Breaking Breaking Displacement (mm)
Transcript of Electrometalurgia y Reciclaje de Materiales. Otros …...Recycled structural self-compacting precast...
Recycled structural self-compacting precast concrete elements as example of sustainability in the precast industry C. Thomas 1,*, J. A. Polanco 1, J. M. Manso 2, F. Fiol 3
1 LADICIM, University of Cantabria, School of Civil Engineering of Santander. Avda. Los Castros s/n, Santander, 39005 Spain. 2 Civil Engeneering Dep., University of Burgos, C/ Villadiego S/N, 09004 Burgos, Spain. [email protected] 3 Architectural Buildings Dep., University of Burgos, C/ Villadiego S/N, 09004 Burgos, Spain. [email protected] * [email protected]
Acknowledgements: We would like to thank the company “ARTEPREF” of the group “Gerardo de la Calle” of Aranda de Duero (Spain) for the support.
STUDIED MATERIAL
In this research, recycled aggregates coming from concrete precast components are used as aggregate for new self-compacting concretes.
First crushing Self compacting concret fabrication
Four different mixtures were studied. A control mixture and incorporation three degrees of recycled coarse aggregate.
Mix prop. [kg] Sand 0-2 Gravel 2-12.5 RA 2-12.5 Filler Cement w/c
HR-45-0% 650 1150 0 270 320 0.35
HR-45-20% 650 920 230 270 320 0.35
HR-45-50% 650 575 575 270 320 0.35
HR-45-100% 650 0 1150 270 320 0.35 Production process of the recycled aggregate on site.
PRECAST PLANT MIXING PROCESS
The industrial test was performed using a 3 cubic meter industrial mixer.
INTRODUCTION
High amounts of good quality concrete wastes in a precast plant: use of recycled aggregate in new self-compacting recycled concretes.
CONCLUSIONS The recycled aggregates of a precast plant are high quality and can be used into self-compacting concrete precast elements. However, the observed losses of mechanical properties are proportional to the degree of substitution but very small in the case of percentages below 20% of recycled aggregate.
9th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials, “WASCON 2015-Resource Efficiency in Construction” , Santander, Spain, 10-12 June 2015
Comparison of the behavior of a beam made with 100% recycled aggregate and a natural aggregate beam, both concretes with 45 MPa.
Mixing process using the equipment of the precast factory.
Three points and shear testing on a reinforced recycled beam performed on the laboratory.
INDUSTRIAL TESTING RESULTS LABORATORY MIXING PROCESS
WASCON 2015 Resource Efficiency in
Construction
Discarted elements of concrete Laboratory testing
Weighting of recycled self-compacting concrete componentes.
Pre-saturation of the recycled aggregate.
Mixing in a vertical laboratory mixer.
Filling of the molds for industrial beams and the test speciment molds.
-158000
-184582,94
-280000
-260000
-240000
-220000
-200000
-180000
-160000
-140000
-120000
-100000
-80000
-60000
-40000
-20000
00 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
Forc
e (N
)
Flexural test on a beam
Recycled aggregate concrete reinforced beam (HR45)
Natural aggregate concrete reinforced beam (HR45)
Breaking
Breaking
Displacement (mm)
