TY - CHAP
T1 - Effect of Polypropylene fibres on the Workability parameters of Extrudable Cementitious Material
AU - Suntharalingam, Thadshajini
AU - Poologanathan, Keerthan
AU - Nagaratnam, Brabha
AU - Hackney, Philip
AU - Ramli, Jeffri
PY - 2021
Y1 - 2021
N2 - Additive manufacturing in construction industry has been introduced as an aspiration for a more sustainable built environment and currently evolving with high demand amongst researches. This study is an investigation of the influence of polypropylene (PP) fibre addition on the workability parameters of a new extrudable concrete mixture. As the quality of final printed structure prominently depends on the fresh state properties of concrete, this investigation mainly focused on the rheological properties such as workability (flow), setting time, extrudability and buildability. These parameters were systematically investigated through a small scale experimental process with time after mixing. The selected control mix with Ground granulated blast furnace slag (GGBS) and Silica Fume (SF) was used in this analysis. The Control cementitious specimens without fibre inclusion and with fibre addition in different volume fraction of binder, ranging from 0.5% to 3% were printed. The results showed that the fibre addition of 0, 0.5 and 1.0% have the better flowability and extrudability compared to 1.5, 2 and 3%. Also, reduction in the print quality was assessed visually with increasing fibre percentage. However, results indicated that the initial setting time is comparatively low for those mixes with higher fibre inclusion which is required for better bond strength between layers. Moreover, higher fibre content caused better buildability and shape retention in the extruded samples.
AB - Additive manufacturing in construction industry has been introduced as an aspiration for a more sustainable built environment and currently evolving with high demand amongst researches. This study is an investigation of the influence of polypropylene (PP) fibre addition on the workability parameters of a new extrudable concrete mixture. As the quality of final printed structure prominently depends on the fresh state properties of concrete, this investigation mainly focused on the rheological properties such as workability (flow), setting time, extrudability and buildability. These parameters were systematically investigated through a small scale experimental process with time after mixing. The selected control mix with Ground granulated blast furnace slag (GGBS) and Silica Fume (SF) was used in this analysis. The Control cementitious specimens without fibre inclusion and with fibre addition in different volume fraction of binder, ranging from 0.5% to 3% were printed. The results showed that the fibre addition of 0, 0.5 and 1.0% have the better flowability and extrudability compared to 1.5, 2 and 3%. Also, reduction in the print quality was assessed visually with increasing fibre percentage. However, results indicated that the initial setting time is comparatively low for those mixes with higher fibre inclusion which is required for better bond strength between layers. Moreover, higher fibre content caused better buildability and shape retention in the extruded samples.
KW - Additive manufacturing
KW - Extrusion-based 3D concrete printing
KW - Polypropylene (PP) fibres
KW - Fresh properties
KW - Workability
U2 - 10.1007/978-981-15-7222-7
DO - 10.1007/978-981-15-7222-7
M3 - Chapter
SN - 9789811572210
VL - 94
T3 - Lecture Notes in Civil Engineering
SP - 427
EP - 435
BT - ICSECM 2019
A2 - Dissanayake, Ranjith
A2 - Mendis, Priyan
A2 - Weerasekera, Kolita
A2 - De Silva, Sudhira
A2 - Shiroma, Fernando
PB - Springer
CY - Singapore
T2 - 10th International Conference on Structural Engineering and Construction Management
Y2 - 12 December 2019 through 14 December 2019
ER -
