Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/219684
Title: ASSESSING THE SUITABILITY OF RICE HUSK ASH MORTAR FOR CONSTRUCTION 3D PRINTING
Authors: YU LING NA
Keywords: Building
PFM
Project and Facilities Management
Kua Harn Wei
2018/2019 PFM
Issue Date: 29-May-2019
Citation: YU LING NA (2019-05-29). ASSESSING THE SUITABILITY OF RICE HUSK ASH MORTAR FOR CONSTRUCTION 3D PRINTING. ScholarBank@NUS Repository.
Abstract: Construction 3D printing is a novel construction method that is attracting much attention in the recent decade. Substituting cement with waste materials such as rice husk ash (RHA) to produce 3D printable construction material can be a great milestone towards promoting sustainability within the construction industry. This paper proposes the use of rice husk ash mortar for construction 3D printing. Jump table test and uniaxial unconfined compression test (UUCT) are performed to evaluate the printability of rice husk ash mortar through assessing the workability and buildability properties. RHA was used as a partial replacement of cement in this study, and the percentage of replacement was set at 20% for all the RHA mixes as this ratio gives the best compressive strength for 3D printing. Based on the experimental result, a water-to-cement ratio of 0.30 with 9.5g of superplasticiser (SP) for mortar mix with 20 wt.% RHA is most ideal for construction 3D printing. Furthermore, it was discovered that with a high amount of SP, RHA mixes were having high workability maintained over a long duration of time. Thus, it is important to reduce the amount of SP in the mix. However, this implies that the water-to-cement ratio has to increase in order to maintain the flowability of the RHA mix. In addition, the experiment results obtained from UUCT also show that addition of RHA can increase the stiffness and green strength for fresh paste when comparing to the Siam cement and control mix.
URI: https://scholarbank.nus.edu.sg/handle/10635/219684
Appears in Collections:Bachelor's Theses

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