Abstract
In this study, a portable concrete 3D printer is designed, and its additive is developed from local materials to address the advancement in digital fabrication for the construction industry. The authors investigate different additive materials in preparing four mixes using Ordinary Portland Cement, white cement, reservoir sediments, dune sand, commercial sand, fine marble waste, and bentonite for a portable concrete 3D printer. The two mixes showed the best compressive strength results, containing fine marble waste and reservoir sediments. The mix WSS (30% white cement, 50% sand, 20% sediment) has resulted in a compressive strength ranging from 18 to 21 kPa after 28 days of curing. The mix WSM (30% white cement, 50% dune sand and 20% fine marble waste) recorded a compressive strength range from 15 to 17 kPa after 28 days of curing. The mixes were successfully employed as an additive for crafting 28 layers in a single attempt using a newly developed portable concrete 3D printer and additive.
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