Concrete is an essential construction material, and infrastructures, such as bridges, tunnels, power plants, consume large quantities of it. Future infrastructure demands sustainability issues necessitate the adoption non-conventional supplementary cementitious materials (SCMs). At same time, global labor shortages are compelling conservative sector to implement autonomous digital fabrication methods, 3D printing. This paper thus investigates feasibility using oil shale ash (OSA) SCM in...

This study investigates the fresh state and hardened mechanical durability properties of 3D-printed concrete. The tests focused on its anisotropic behavior in response to different load orientations. Compressive, flexural, splitting tensile strengths were evaluated relative print layers orientation. Results showed that compressive strength varied significantly, achieving 85% cast sample when was applied parallel ([u] direction), 71% perpendicular object’s side plane ([v] while only reaching...

Abstract Over the last decade, research has increasingly focused on reducing use of natural resources and improving waste management in construction industry. Various possibilities exist for this sector, ranging from using as filler materials to developing new binders building materials. This study focuses development bio-based manufacturing wood-wool cement boards. The binder were obtained used research. developed tested their visual appearance, macrostructure, material density, thermal...

Over the last years there has been an increase in demand for construction materials that fulfil high-level energy efficiency requirements while ensuring reduced impact on environment compared to traditionally used materials. The hemp-lime concrete as a self-bearing thermal insulation material with low conductivity and neutral CO2 emissions is one of such can ensure it. However due its limited strength use this problematic projects industrial scale. Magnesium oxychloride binders are...

Abstract Hempcrete is a bio-based self-bearing envelope and thermal insulation building material that becoming more popular nowadays has low environmental impact, especially CO 2 emissions. This study looks for solutions hempcrete printing using custom-built gantry type 3D printer typically used concrete printing. Preliminary research shows can be printed at relatively density of 660 kg/m 3 achieve an adequate buildability compressive strength individual wall elements. At this density,...

With the growing global concerns regarding sustainable development in building and construction industries, concentration only on engineering properties of materials can no longer meet requirements. Although some studies have been implemented based lifecycle assessment lightweight cement-based materials, very few attempts made pertaining to multi-criteria optimization, especially when fly ash cenospheres are used as aggregates nano additives incorporated modifying admixtures. This...

Abstract Global warming being increasingly discussed, solutions for reducing emission greenhouse gases become more important in all industry sectors. The total energy consumed the construction sector contribute up to 1/3 from emissions. Large part of it comes cement production – 5 % global foam concrete is lightweight with good thermal properties and ability reduce CO2 emissions by use due its low density. aim this study determine impact on environment Life Cycle Assessment (LCA) focus...

The construction industry is one of the largest emitters CO2 because production traditional building materials highly energy-intensive and uses considerable amounts raw materials. This research aims to decrease negative environmental impact by providing biocomposites with a low due their bio-based components efficient use through 3D printing. Agricultural waste products—hemp shives—are used in these as filler together three different types fast-setting binders—magnesium, calcium...

Abstract This work is devoted to developing an energy-efficient solution for the external wall and evaluating its environmental impact. Several types of innovative single-layer sandwich-type solutions were analysed compared. Different constructive thermal insulation materials used, including traditional such as AAC (autoclaved aerated concrete) normal concrete. Advanced materials, high-performance foamed concrete (HPFC) natural biofibre composites, have been evaluated alternative solution....

This study investigates the possibility of utilising bottom slag (BS) waste from landfills, and a carbonation process advantageous for use artificial aggregates (AAs) in printed three-dimensional (3D) concrete composites. In general, main idea granulated is to reduce amount CO2 emissions 3D objects (wall). AAs are made construction materials, both carbonated. Granules combination binder (ordinary Portland cement (OPC), hydrated lime, burnt shale ash (BSA)) material (BS). BS left over after...

This paper presents a study focusing on the environmental impacts of foamed concrete production and exploitation. CO2 emissions are very important factor for describing durability sustainability any building material its life cycle. The sector is one largest energy-consuming sectors in world. In this evaluated with regard to three types energy resources (gas, coal eco-friendly fuel). related savings raw materials up 120 t water per 1000 traditionally mixed 350 sand produced intensive mixing...

The evolution of bio-based composites in the building industry is strongly linked with growing demand for sustainable development, which relevant nowadays. Hemp shives are a large group organic residues that obtained process oil extraction as well straw processing. These could be utilized along binder constituents manufacture composites. This study focused on impact density and relative humidity effective thermal conductivity hemp shive-based bio-composites magnesium binder. For this reason,...

The view towards a sustainable bioeconomy is increasing the interest of using renewable natural resources in production composites. Until now, composites has been mainly examined from point material composition and structure, by replacing petroleum-based components with those that are obtained known as fiber (NFCs). usefulness newly acquired materials mostly evaluated considering their performance economic costs, whereas aspect environmental protection underestimated. impact made within two...

To address the need to reduce consumption and pollution in industrial sector, composite materials were created using a new type of raw materials-organic lake sediments (sapropel) as binder; sphagnum moss, flax fiber, vermiculite filler. The main application these is for sound absorption moisture buffering, but since they contain bio-based binders fillers, also work carbon storage. Within framework this work, total 100 samples created. Fungicides-a biocide quaternary ammonium compound its...

Over the past decade, 3D printing with concrete has been widely adopted worldwide. The primary drivers for this innovation are reduction in manual labor and more efficient use of natural resources. New materials that suitable developed, which characterized by rapid setting robust physical mechanical properties. In study, first time, ternary gypsum–cement–pozzolanic (GCP) composites were developed evaluated printing. These associated durability water as Portland cement (PC) while maintaining...

The paper tackles the important problem of estimating and predicting thermal conductivity bio-based building materials that can help decarbonize sector. Knowledge possibility to optimize their insulating properties is first criterion for determining ability use in novel yet not well-studied hemp shives magnesium binder composites with improved mass by microencapsulated phase change material (PCM) were considered. samples without PCM having different densities as well amounts same density...

This research investigates the impact of waste glass powder, high-frequency ultrasonics (HFUS) dispersion, and liquid treatment on aluminum-based ultra-lightweight concrete. Substituting up to 80% Portland cement with powder significantly delays hydration reduces compressive strength by 77%. However, applying HFUS dispersion for 60 s a mixture 30% substitution restored reference value 3.1 MPa. The combined enhanced 87%, increased density 32%, reduced prosody. Scanning electron microscopy...

One of the main challenges that construction industry faces today is how to address demands for more sustainable, environmentally friendly and carbon neutral materials building upkeep processes. answers these lime-hemp concrete (LHC) - negative have sufficient thermal insulation capabilities be used as new well existing buildings. But one problem needs overcome before can on a large scale current manufacturing technology allows only self-bearing material with labour intensity in process. In...