Study on kenaf powder reinforced cement materials for concrete 3d printing process
The use of kenaf fibre in concrete possesses great advantages than other natural fibres. The advance development like three-dimensional concrete printing (3DCP) is still at early stage which is at development of concrete composite materials for concrete printing materials. Thus, in this resear...
Saved in:
Main Author: | |
---|---|
Format: | Thesis |
Language: | English English English |
Published: |
2021
|
Subjects: | |
Online Access: | http://eprints.uthm.edu.my/6478/1/24p%20MOHAMAD%20IZWAN%20SAIFUDIN%20MOHD%20ZAINURI.pdf http://eprints.uthm.edu.my/6478/2/MOHAMAD%20IZWAN%20SAIFUDIN%20MOHD%20ZAINURI%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6478/3/MOHAMAD%20IZWAN%20SAIFUDIN%20MOHD%20ZAINURI%20WATERMARK.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | The use of kenaf fibre in concrete possesses great advantages than other natural fibres.
The advance development like three-dimensional concrete printing (3DCP) is still at early
stage which is at development of concrete composite materials for concrete printing
materials. Thus, in this research, introduction of kenaf fiber into cement are studied; the
different weight percentages (3,5 and 7%) of untreated kenaf powder (KP) was used to
mix with Ordinary Portland Cement (OPC). The cement mixture specimens were
fabricated through conventional mold method. The setting time, slump flow diameter
(SFD) and slump height (SH) were calculated for observe workability and flowability of
cement mixtures. Further, the compressive strength and density were measured for
hardened cement mixtures at 7, 14 and 28-days curing age. All these properties were
evaluated by using ASTM standards. Additionally, microstructure of the cement mixture
was analyzed through finite element scanning electron microscopy (FESEM). The
optimum value of setting time was obtained as 190 minutes at 3% of KP. For workability
and flowability, the optimum value of SFD and SH were achieved as 41 mm and 40 mm
respectively at 3% of KP. The compressive strength and density increased by increasing
the curing age, and the maximum value of them was obtained at upper curing age period.
Moreover, the optimum value of compressive strength and density were obtained as 10.2
MPa and 1.71 g/mm3
respectively at 3% of KP. For microstructure analyses, the porosity
and air voids increased by increasing the weight percentages of KP. As based on the
obtained results, the addition of KP into cement can produce the lightweight concrete
printing and the kenaf powder concrete mixture also have potential to be apply in the
3DCP machine in future experiment. |
---|