3D printing or additive manufacturing is an example of technology development in the construction sector. In 3D printing mortar, many things need to be considered regarding the characteristics of the mortar, such as workability, initial setting time, compressive strength, extrudability, and buildability. In previous studies, there were problems in the printing process, such as a lousy extrusion process and cracks in the 3D printing mortar sample. This study used calcium carbonate and a viscosity-modifying agent (VMA) to modify the mixture to achieve the desired characteristics. The extrudability and buildability were tested by observing the extrusion process and measuring the thickness and width of each layer printed. Based on the research, adding calcium carbonate and VMA can reduce workability and accelerate the initial setting time of the mixture. The use of VMA can reduce the compressive strength of the mixture. Using calcium carbonate and VMA can also increase the buildability of the mixture. From the compressive strength test, there was a decrease of 39.26% in the 3D printing mortar sample compared to the mortar cube sample. In addition, it was found that the 3D printing mortar is anisotropic, so the compressive force’s direction affects the compressive strength produced.

South Sulawesi, specifically Sinjai area, is an aromatic rice development area that has the potential to be developed. The applied cultivation was still traditional and based on local wisdom which was without the use of fertilizers, pesticides and other chemical drugs, so it was expected that there was a high diversity of microorganism biodiversity in plant tissues, especially endophytic fungi could produce Indole Acetic Acid (IAA) hormone. The purpose of this study was studying the potential of fungi isolates as producer of IAA hormone from Sinjai local red rice. Stages of research included macroscopic and microscopic observations of endophytic fungi and IAA hormone analysis. The fungus which had the potential to produce the highest IAA hormone was P31 BMB 16E isolate (15.17 ppm).