Daniel Tay
@ntu.edu.sg
Nanyang Technological University
Scopus Publications
Scopus Publications
Tan Kai Noel Quah, Tran Vy Khanh Vo, Yi Wei Daniel Tay, Ming Jen Tan, Teck Neng Wong, and King Ho Holden Li
MDPI AG
Utilization of an Electromechanical impedance (EMI) technique with Piezoelectric (PZT) sensors has showed potential for Structural Health Monitoring (SHM). The changes in mechanical structure via flexural bending and cracking can be detected by monitoring the deviations in electrical impedance signals recorded with embedded PZT sensors. This paper has conducted a comprehensive study on the potential of an EMI technique with embedded PZT sensors with 3D Concrete Printing (3DCP) structures subjected to flexural bending test until plastic failure. The impact of different Piezoelectric housing methods and materials has been studied comprehensively through the monitoring of EMI signals. Experimental results indicate that material housing types and thickness affect the sensitivity of EMI readings but also performed as a reinforcement when a load is directly applied. The embedded PZT sensors with the EMI technique have shown strong potential to address the cost and lifecycle challenges posed by traditional construction methods as the insertion of PZT sensors seamlessly functions with 3DCP workflows. Further developmental work can be carried out to address the sensitivity of the sensor, performance as a reinforcement, and installation automation. The results proved that the coated sensors could detect fractures in 3DCP concrete with decreased sensitivity on thicker coating layers through the variance in materials and coating thickness in the paper.
Tan Kai Noel Quah, Yi Wei Daniel Tay, Jian Hui Lim, Ming Jen Tan, Teck Neng Wong, and King Ho Holden Li
MDPI AG
In Singapore, there is an increasing need for independence from manpower within the Building and Construction (B&C) Industry. Prefabricated Prefinished Volumetric Construction (PPVC) production is mainly driven by benefits in environmental pollution reduction, improved productivity, quality control, and customizability. However, overall cost savings have been counterbalanced by new cost drivers like modular precast moulds, transportation, hoisting, manufacturing & holding yards, and supervision costs. The highly modular requirements for PPVC places additive manufacturing in an advantageous position, due to its high customizability, low volume manufacturing capabilities for a faster manufacturing response time, faster production changeovers, and lower inventory requirements. However, C3DP has only just begun to move away from its early-stage development, where there is a need to closely evaluate the process parameters across buildability, extrudability, and pumpability aspects. As many parameters have been identified as having considerable influence on C3DP processes, monitoring systems for feedback applications seem to be an inevitable step forward to automation in construction. This paper has presented a broad analysis of the challenges posed to C3DP and feedback systems, stressing the admission of process parameters to correct multiple modes of failure.
Yi Wei Daniel Tay, Sean Gip Lim, Seng Liang Bryan Phua, Ming Jen Tan, Bandar A. Fadhel, and Issam T. Amr
Informa UK Limited
Mingyang Li, Xu Zhang, Yi Wei Daniel Tay, Guan Heng Andrew Ting, Bing Lu, and Ming Jen Tan
Elsevier
Yi Wei Daniel Tay, Guan Heng Andrew Ting, Biranchi Panda, Teck Neng Wong, and Ming Jen Tan
Elsevier BV
Yi Wei Daniel Tay, Jian Hui Lim, Mingyang Li, and Ming Jen Tan
Informa UK Limited
ABSTRACT The varying physical property in a functionally graded material can be tailored to its specific requirements while using material resources effectively. 3D concrete printing can produce robust and lightweight functionally graded material for the construction industry. In this study, an approach was developed to create an objective tailored functionally graded concrete material by examining the filament material property correlations with the printing parameters. It was found that the physical property of the printed material is closely correlated to the flow rate and travel speed of the printer. Results obtained from the experiment show that the optimised structure achieved an approximately 50% improvement in the strength-to-weight ratio. This preliminary examination of the 2D optimised concrete structure opens the realm of possibility for future work in 3D optimised functionally graded concrete.
Guan Heng Andrew Ting, Yi Wei Daniel Tay, and Ming Jen Tan
Elsevier BV
Zhixin Liu, Mingyang Li, Yi Wei Daniel Tay, Yiwei Weng, Teck Neng Wong, and Ming Jen Tan
Elsevier BV
Yi Wei Daniel Tay, Ye Qian, and Ming Jen Tan
Elsevier BV
Yi Wei Daniel Tay, Ming Yang Li, and Ming Jen Tan
Elsevier BV
Yi Wei Daniel Tay, Guan Heng Andrew Ting, Ye Qian, Biranchi Panda, Lewei He, and Ming Jen Tan
Informa UK Limited
ABSTRACT An advancing technology that combines the concrete extrusion with a motion control to create structures with complex geometrical shapes without the need for formwork is known as 3D concrete printing. Since this technique prints layer by layer, the time taken to reach the same position in the subsequent layer is important as it will create an anisotropic property that has a weaker tensile strength at the bond interface of the two printed filaments. Through rheological measurement, which reveals the material deformation and flow behaviour, it is possible to examine the material structural build-up due to time-gap effect by measuring at different time delay. This paper focuses on investigating the time-gap effect on the printed filament with rheological and observation at macroscopic-scale to understand the material behaviour of the initial and subsequent printed layer during its fresh phase. Rheological experiment findings reveal that the tensile strength of the printed specimen is correlated to the material modulus at the initial layer.
Guan Heng Andrew Ting, Yi Wei Daniel Tay, Ye Qian, and Ming Jen Tan
Springer Science and Business Media LLC
Biranchi Panda, Nisar Ahamed Noor Mohamed, Yi Wei Daniel Tay, and Ming Jen Tan
Springer International Publishing
Xu Zhang, Mingyang Li, Jian Hui Lim, Yiwei Weng, Yi Wei Daniel Tay, Hung Pham, and Quang-Cuong Pham
Elsevier BV
B. Panda, Y.W.D. Tay, S.C. Paul, and M.J. Tan
Wiley
AbstractThe emphases on reduction of construction time and production costs have profound influences on the construction process that has led us to investigate a new paradigm, known as 3D concrete printing. This technique can fabricate complex 3D building components directly from computer aided design models without any tooling and human intervention. However, compatibility of the presently available materials has impeded its widespread application and commercialization. This paper introduces an overview of concrete printing processes and its noteworthy potentials in the building and construction sector. After sketching the potential, a novel fly ash based inorganic geopolymer is printed and characterized in terms of fresh and hardened properties with an aim for sustainable built environment.
B. Panda, N. Mohamed, Daniel Yi Wei Tay, Lewei He and M. Tan
3D concrete printing is gaining ground in the construction industry. In concrete printing, fresh concrete layers are deposited layer by layer manner like fused deposition modelling process following a computer-aided design (CAD) model. The structural capacity of the printed part mainly depends on the bond strength between the old substrate and new overlaid concrete. Hence, it is essential to measure the inter layer bond strength and its influencing parameters. In this paper, a novel geopolymer ink is considered as reference material, that exhibits thixotropic property, suitable for 3D printing application. The said geopolymer thixotropic build up rate was altered by adding slag in two different percentages. From the experimental outcomes, it was found that, rapid structural build-up and long delay time can cause poor bonding in the interface properties of the printed structure. This delay time depends strongly on the thixotropic behavior, the thickness of the layers and roughness of the interface between the two layers.
W. Lao, Daniel Yi Wei Tay, Didier Quirin and M. Tan
In direct-extrusion based Additive Manufacturing of Concrete (AMoC), the compactness and the mechanical strength of printed parts can be improved by optimizing the shape of extrudate. The shape of extrudate is significantly affected by the shape of nozzle outlet because of the viscoelastic behavior of fresh concrete. In this paper, different shapes of nozzle were tested to find the nozzle design for the optimized printing quality. Three different nozzles were fabricated by Fused Deposition Method mounted on a mechatronic nozzle, which was plugged on a robotic arm. From the compression test of the specimen and the observation of cross-section of the specimen, the mechanical strength and compactness of the sample were obtained. The result could help to find the relationship between the quality of concrete printing and the shape of nozzle outlet.
Ashokreddy Annapareddy, Mingyang Li, M. Tan, A. Ting and Daniel Yi Wei Tay
Post-consumer glass existing in co-mingled waste to be used for landfill poses a serious environmental issue due to its non-biodegradable nature. Therefore, glass materials are often extracted and recycled for other applications. The building and construction (B&C) field present an attractive application for recycled glass as replacement of fine aggregates in cementitious materials, the second most consumed material in the world after water. With the growth in interest towards 3D printing for the B&C field in recent years, much research has been conducted with respect to 3D cementitious material printing (3DCMP). 3DCMP has gained its stand in the B&C field as it does not require any formwork and human intervention and permits designing for structural optimization. Hence, with the accompanying advantages of both 3DCMP and the need for recycling glass waste, this study aims to replace the fine aggregates of the cementitious material by the processed recycled glass to be used for 3D printing. This paper studies the gradation of the recycled glass aggregates in the 3D printable cementitious material. Three different gradations were designed using the different particle size of recycled glass materials supplied and investigated using the same binder mix design. For each gradation, the fresh and hardened properties were investigated. Printing investigations were also conducted on the studied recycled glass gradations.
B. Panda, Daniel Yi Wei Tay, A. Ting, Lewei He and M. Tan
: 3D concrete printing is an innovative additive manufacturing process where the material is extruded through a nozzle to print structure layer-by-layer. In this paper, the authors investigate the possibility of improving the interface bond strength of this layer by layer construction technique. Many factors affect the bond strength between the two layers such as time gap, surface contact area and surface moisture. The nozzle requires a specific amount of time for it to complete one cycle (time gap). Four different time-gap on the bond strength of individual layer was studied and is found that the bond of a shorter time gap yields better strength. A proposed method to improve the strength of the bond at the interface is to increase the contact surface area. Increasing the contact surface area of the layers could improve the bond strength.
Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor Mohamed, Yi Wei Daniel Tay, and Ming Jen Tan
Elsevier BV
Suvash Chandra Paul, Yi Wei Daniel Tay, Biranchi Panda, and Ming Jen Tan
Springer Science and Business Media LLC
Biranchi Panda, Suvash Chandra Paul, Lim Jian Hui, Yi Wei Daniel Tay, and Ming Jen Tan
Elsevier BV
Yi Wei Daniel Tay, Biranchi Panda, Suvash Chandra Paul, Nisar Ahamed Noor Mohamed, Ming Jen Tan, and Kah Fai Leong
Informa UK Limited
ABSTRACT Three-dimensional (3D) printing (also known as additive manufacturing) is an advanced manufacturing process that can produce complex shape geometries automatically from a 3D computer-aided design model without any tooling, dies and fixtures. This automated manufacturing process has been applied to many diverse fields of industries today due to significant advantages of creating functional prototypes in reasonable build time with less human intervention and minimum material wastage. However, a more recent application of this technology towards the built environment seems to improve our traditional building strategies while reducing the need for human resources, high capital investments and additional formworks. Research interest in employing 3D printing for building and construction has increased exponentially in the past few years. This paper reviews the latest research trends in the discipline by analysing publications from 1997 to 2016. Some recent developments for 3D concrete printing at the Singapore Centre for 3D Printing are also discussed here. Finally, this paper gives a brief description of future work that can be done to improve both the capability and printing quality of the current systems.