Waste Binder Research Articles

Synergetic Effects of Alkaline and Sulfate-Based Waste Binders on Undrained Triaxial Behavior of Cement-Admixed Soft Clay

Synergetic Effects of Alkaline and Sulfate-Based Waste Binders on Undrained Triaxial Behavior of Cement-Admixed Soft Clay

Durability Performance of CGF Stone Waste Road Base Materials under Dry-Wet and Freeze-Thaw Cycles.

The disposal of stone waste derived from the stone industry is a worldwide problem. The shortage of landfills, as well as transport costs and environmental pollution, pose a crucial problem. Additionally, as a substitute for cement that has high carbon emissions, energy consumption, and pollution, the disposal of stone wastes by utilizing solid waste-based binders as road base materials can achieve the goal of "waste for waste". However, the mechanical properties and deterioration mechanism of solid waste-based binder solidified stone waste as a road base material under complex environments remains incompletely understood. This paper reveals the durability performance of CGF all-solid waste binder (consisting of calcium carbide residue, ground granulated blast furnace slag, and fly ash) solidified stone waste through the macro and micro properties under dry-wet and freeze-thaw cycling conditions. The results showed that the dry-wet and freeze-thaw cycles have similar patterns of impacts on the CGF and cement stone waste road base materials, i.e., the stress-strain curves and damage forms were similar in exhibiting the strain-softening type, and the unconfined compressive strengths all decreased with the number of cycles and then tended to stabilize. However, the influence of dry-wet and freeze-thaw cycles on the deterioration degree was significantly different; CGF showed excellent resistance to dry-wet cycles, whereas cement was superior in freeze-thaw resistance. The deterioration grade of CGF and cement ranged from 36.15 to 47.72% and 39.38 to 47.64%, respectively, after 12 dry-wet cycles, whereas it ranged from 57.91 to 64.48% and 36.61 to 40.00% after 12 freeze-thaw cycles, respectively. The combined use of MIP and SEM confirmed that the deterioration was due to the increase in the porosity and cracks induced by dry-wet and freeze-thaw cycles, which in turn enhanced the deterioration phenomenon. This can be ascribed to the fact that small pores occupy the largest proportion and contribute to the deterioration process, and the deterioration caused by dry-wet cycles is associated with the formation of large pores through the connection of small pores, while the freeze-thaw damage is due to the increase in medium pores that are more susceptible to water intrusion. The findings provide theoretical instruction and technical support for utilizing solid waste-based binders for solidified stone waste in road base engineering.

Mechanical and thermal properties of composite carbonized briquettes developed from cassava (Manihot esculenta) rhizomes and groundnut (Arachis hypogea. L.) stalks with jackfruit (Artocarpus heterophyllus) waste as binder

Composite briquettes from agricultural residues are a potential sustainable domestic solid fuel resource. This study aimed to develop and characterize composite briquettes developed from cassava rhizomes and groundnut stalks with jackfruit waste binder as an alternative sustainable fuel for domestic cooking applications. Cassava rhizomes and groundnuts stalks feedstock were carbonized in a step-down kiln under slow pyrolysis conditions at temperatures between 400 and 500 ℃. Thermogravimetric analysis was used to determine the proximate and thermal properties of the developed composite briquettes. Bomb calorimetry was used to determine their heating values. Relaxed density, drop strength and compressive strength results were used to determine the mechanical properties of the developed briquettes. Design of Experiments (Box Behnken design) was used to evaluate the effect of factors (biochar amount, jackfruit waste binder amount, and amount of water) on the mechanical and thermal properties of the developed composite briquettes. The Coats-Redfern kinetic model was used to determine the activation energy for the developed briquettes. Calorific values and drop strength of developed composite briquettes ranged from 18.1 to 24.0 MJ/kg and 92–99%, respectively. Combustion performance results indicated that ignition temperature increased from 155.1 to 184 ∘C\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^\\circ{\\rm C}$$\\end{document}, when heating rate was increased from 10 to 15 ∘C\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^\\circ{\\rm C}$$\\end{document}/min. However, burnout temperature decreased from 618.1 to 453 ∘C\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$^\\circ{\\rm C}$$\\end{document}/min with a similar corresponding increase in heating rate. Optimum biochar amount, amount of water, and jackfruit waste binder amount for optimal mechanical and thermal properties were 89.3%, 893.0 ml, and 29.5 g, respectively. Composite briquettes developed from cassava rhizomes and groundnut stalks with jackfruit waste as binder are suitable potential domestic cooking fuels.

Exploring alkali-source, pore-filling and cementation damage effects in cemented clay with typical industrial waste binders

Various industrial waste binders (IWBs) are being recycled in soil stabilization to save cement consumption. However, the coupled effects brought out by combined IWBs on stabilized soils are still unclear. IWBs are categorized into two typical categories (IWB-A and IWB-B) referring to their chemical role in this study. The alkali-source effect, pore-filling effect and cementation damage effect by IWBs in soil stabilization are explored. A series of mechanical and microscopic tests is performed on stabilized clay with different proportions of IWB-A and IWB-B. Moreover, initial water contents and cement contents of cement-stabilized clay are varied to examine the evolution of coupled effect with void ratio and cementation level. The results indicate that the alkali-source effect strengthens the cementation bonds and increases the early strength by 0.5–1.3 times, whereas the pore-filling effect improves the microfabric especially for the specimen with a large void ratio. The alkali-source effect increases soil cohesion cu at the pre-yield stage, and the pore-filling effect increases frictional angle φu at the post-yield stage. The cementation damage effect is remarkable at a low void ratio, which may result in many extruded pores among soil aggregates. The strength evolution with IWB proportions can be well stimulated by considering the coupled alkali-source effect, pore-filling effect and cementation damage effect. The optimal proportion of IWBs corresponds to an optimal combination of coupled effect.

Performances of concrete with binder and/or aggregates replacement by all-solid waste materials

Aiming for an all-solid waste concrete, a quaternary solid waste binder (SWBs) system comprising blast furnace slag, fly ash, desulfurization gypsum, and Bayer red mud was developed and utilized for both binders and preparation of cold bonded artificial aggregates. The first section investigated and discussed the hydration properties and strength gain mechanism of SWBs, revealing that ettringite formation and growth contribute to early age strength development of SWBs, while C-A-S-H formation contributes significantly to the later strength gain. The second section systematically studied the concrete performances, including mechanical properties, shrinkage, chlorides, and seawater resistance. An all-solid waste-based concrete strategy was presented by gradually substituting cement and natural aggregates. It was observed that SWBs-based concrete exhibited significantly lower shrinkage and excellent chloride ion resistance, although slightly lower mechanical properties were observed. The solid waste-based artificial aggregates proved viable alternatives to natural rock aggregates in low-strength concrete classes. Incorporating artificial aggregates endowed the concrete with self-curing properties and reduced its shrinkage and chloride migration, with only a minor effect on its mechanical strength. Lastly, an all-solid waste concrete combining the characteristics of SWBs and cold-bonded artificial aggregates was achieved. The resulting concrete exhibited lower shrinkage and excellent chloride and seawater resistance. This study provides a reference for designing and developing solid waste-based binders and concrete.

Effect of waste binder material usage rate on thixotropic behaviour of cementitious systems

In order to investigate the feasibility of using waste as an alternative binder in cement-based materials, the effects of using recycled concrete powder (RCP), glass powder (GP), marble powder (MP), and limestone powder (LP) in place of portland cement on the rheological and fresh characteristics of cementitious systems were determined. In this regard, the influence of the utilization of waste materials and the substitution ratio (25% and 35%) on the parameters of the cement paste mixtures that change over time, such as setting time, Marsh-funnel flow time, mini-slump value, viscosity, and dynamic yield stress (DYS), were determined. The effect of 4 different type waste powder materials on the rheology and thixotropy of cementitious systems was investigated using two different methods (loop and constant shear strain rate methods). In order to reduce cement consumption, the effect of the use of waste powder materials on the time-dependent behavior of cementitious systems has been examined, and important results have been obtained for cases (such as producing 3D concrete or self compacting concrete) where time-dependent consistency change is important. It was determined that replacing RCP and GP enhanced the DYS values while replacing MP and LP decreased them. In this context, it was understood that regardless of time, MP and LP promote flowability, whereas RCP and GP diminish flowability. RCP35 had the greatest Ithix_shr and Ithix_vis values at the 20th minute, whereas MP and LP-containing mixtures had the lowest values. The mixtures with the highest and lowest thixotropic degrees were RCP35 and LP35, respectively.

Geopolymers: The Green Alternative to Traditional Materials for Engineering Applications

Researchers have been driven to investigate sustainable alternatives to cement production, such as geopolymers, due to the impact of global warming and climate change resulting from greenhouse gas emissions. Currently, they are exploring different methods and waste materials to enhance the mechanical and physical properties of geopolymer and expand its application range. This review paper offers a thorough analysis of the utilization of various waste materials in geopolymer manufacturing and shows the creative contribution of this research to the development of environmentally friendly cement substitutes. The article covers the properties, durability, and practical applications of geopolymer composites made from various waste binders. It includes a microstructure and chemical analysis. The research findings indicate that geopolymers are an effective cementitious binder substitute for cement in various applications. Additionally, the ecological and carbon footprint analysis highlights the sustainability of geopolymers compared to cement.

Effects of electric arc furnace slag powder and fly ash within ternary waste blend on performance of concrete

Recently, research on utilising industrial and natural waste has advanced owing to their environmental concerns, including soil and groundwater contamination. Most such waste possess zero or low commercial value, yet it is stored, occupying large storage yards. Iron and steel factories and quarries worldwide produce large amounts of waste annually. This study used three types of steel mill waste (electric arc furnace slag powder, fly ash and steel sludge and natural waste from quarries limestone dust, marble dust, and recycled glass powder) as supplementary cementitious materials with the aim of producing an economical and environmentally friendly ternary waste binder. To determine the appropriate waste blend compounds of mixes, the study was conducted in three stages. First, waste mortars were used to mix, tests of mortars properties were conducted, and the properties of the mix were compared with those of a control mortar mix. Second, concrete was mixed from the waste blend with the most suitable properties. Finally, durability tests on the concrete were performed. Ternary residue having 4.5% SP, 10% FA, and 4.5% SS with 18% replacement of cement and that having 3.75% SP, 7.5% FA, and 3.75% LD with 15% replacement of cement achieved the requirements of concrete and improved the compressive strength and durability towards sulfate and chloride attack, including impermeability and resistance.

STUDI KARAKTERISTIK PROSES PIROLISIS CEPAT RDF-5 BEBRBAHAN DASAR LIMBAH AREN DAN KOPI DENGAN PENGIKAT LIMBAH PLASTIK TERHADAP KUANTITAS BIO-OIL

<p>Currently, the Indonesian people are faced with various problems in terms of waste management, both organic and inorganic waste. Some of the wastes that can be used are palm waste, coffee grounds and HDPE plastic waste which can be used as alternative fuels, one of which is through the pyrolysis process. Pyrolysis is a process of chemical decomposition of a material thermally in the absence of oxygen. This pyrolysis process converts RDF-5 biomass into a liquid smoke product in the form of bio-oil. This study aims to determine the quantity of pyrolysis oil through the best variation of the composition ratio used. In this study used composition ratio variables, namely 50%:30%:20%, 40%:40%:20%, and 30%:50%:20%. The results of this study obtained the best quantity from a mixture ratio of 50% palm waste, 30% coffee grounds and 20% HDPE plastic to produce 200 ml. The composition ratio affects the quantity of pyrolysis oil results. RDF-5 from palm waste and coffee grounds with HDPE plastic waste binder produces a quantity that tends to decrease as the composition ratio of palm waste waste decreases.</p>

Impact of glass waste and rubber waste over the environment and their applications in concrete

In this experimental research study, glass waste in powdered form and rubber waste in fine aggregate form were practised for the intensification of the ordinary controlled concrete. Glass waste in powdered was practised in place of ordinary binder that is cement and the rubber waste after proper processing was utilized in place of ordinary sand. Glass waste in powdered form was practised from 0 percent to 25 percent and the rubber waste fines were practised at 25 percent and 50 percent. Overall, 11 dissimilar kinds of mixes were considered depending upon the proportion of the ordinary binder, proportion of glass waste binder, the proportion of ordinary sand, proportion of rubber fines and proportion of coarse aggregate. Then concerning the proportion of the substantial several samples were executed and then examined for destructive examination. The examination consequence of the compression test of the concrete reveal that the maximum compressive strength of the modified concrete was attained at 20 percent application of the waste glass fine powder when used in place of cement and at 25 percent application of the waste rubber fines when used in place of natural silt. It was further determined that both the substantial healed the internal pores of the concrete and thus leads to enhanced productivity of the normal concrete. It was also taken into account that the higher proportions of both the undertaken substantial leads to the loss in the core properties of the concrete. Further, the outcomes of another destructive examination that is the tensile strength test and flexural strength test, outposts that the supreme forte of the substantial concrete was gotten at 25 percent practice of the waste rubber fines and 20 percent practice of the waste glass fine in powdered form when utilised as an alternative for ordinary fines and binder correspondingly. It was also observed that the least strength consequences were attained at supreme percentages in the case of both the taken substantial. The tensile and flexural behaviour of the concrete is enhanced with the intensification of the proportions of the constituents. From the results of all kinds of destructive and non-destructive test, it was found at the last that the most suitable results were attained at 20% practice of waste glass fine powder and at 25% practice of the waste rubber fine powder when used in combination with one another. Further it can also be concluded that while practising together in place of natural binder and natural fine aggregate, beyond these proportion the strength starts declining in all cases either in case of destructive testing or in case of non-destructive testing.

Comparison of industrial wastes as a binder in the agglomeration of coal fines

There is limited work reported in the literature on the use of waste material as a coal binder, and no study has reported the use of industrial petroleum waste as a binder for fine discard bituminous coal. In this study, the binding properties of five industrial wastes were evaluated to determine their efficacy in the agglomeration of Highveld inertinite-rich coal fines; four waste products from the petrochemical industry and one waste recycled low-density polyethylene (LDPE) were used as binders. Therefore, the addition of waste binders was investigated to use the briquettes as carriers to reduce waste. The compressive strength, CS (MPa), impact resistance index, IRI (−), friability index, FR (%), abrasion resistance, AR (%), and water resistance index, WRI (%) of the briquettes were determined to evaluate the mechanical strength of the briquettes. The binderless briquettes had a maximum CS of 3.4 MPa, higher than the minimum CS of bituminous coal (2.1 MPa). The optimal concentration for each binder, based on mechanical strength (CS, IRI, FR), was determined as 15% Binder A (4.1 MPa; 68; 80%), 20% Binder B (2.3 MPa, 87, 71%), 20% Binder C (8.2 MPa, 1000, 100%), 5% Binder D (2.4 MPa, 21, 46%) and 5% Binder E (5.3 MPa, 97, 52%). Briquettes bound with 20% Binder B and 5–10% Binder E were water-resistant. The briquettes were matched with suitable industrial processes based on the obtained mechanical strength and physiochemical properties. The binderless and the Binder B and D bound briquettes may be suitable for PCC boilers because their strength is high enough to enable transportation and low enough not to inhibit pulverising. Binders B, C and E bound briquettes may be more suited for use in a fixed-bed-‍gasifier. None of the binders was recommended for use in blast furnaces due to the high ash yield, low volatile matter content and lack of swelling properties.

Studying the Effect of High Temperature on the Content of Glass and Brick Waste Binders after Alkaline Activation

The high-temperature mechanical behaviour of a glass and brick waste alkaline to synthesize geopolymer mortar was studied. The mortar in question contained 100% glass powder GWP and 90% of a blend of brick waste GBWP, brick waste BWP and a solid activator (10 mol concentration of NaOH mixed with glass water (Na2SiO3). The material was tested during exposure to high temperatures to establish its density, weight loss, compressive strength, accessible porosity in water, expansion of pastes, XRD and TG-DSC analysis using an innovative methodology to notch the hydrated geopolymers paste specimens after exposed to five maximum temperatures, 100℃, 200℃, 400℃, 600℃ and 800℃ without any imposed load during the heating. The results were found that GBWP gave better values in compressive strength, reaching 38.3 MPa at 100℃ and other proportional values at 400℃, 600℃ respectively compared with GWP. As for the density, the high temperature contributed to its decrease, which caused the presence of high porosity at 800℃. On the other hand, the high temperature helped to improve the mechanical and physical behavior of BWP, where the resistance reached 24.91 MPa at 200℃. In addition, for the microstructure and different particles related to the interactions were identified through the XRD and TG-DSC analysis procedure, in order to know the highest temperatures that allow changing the structure and properties of this type of alternative binders.

Development of composite materials based on chrome-containing waste and polyurethane binder

The results of a study of the effect of the type and consumption of binder and plasticizers on the physicochemical characteristics of composite materials obtained using chromium-containing fibrous wastes from leather production are presented. The absence of chromium compounds in water extracts of composites has been established, which confirms the environmental safety of new composite materials.

Environmental-friendly mortar produced with treated and untreated coal wastes as cement replacement materials

This study aims to examine the influence of untreated coal waste (UCW) and treated coal waste (TCW) as supplementary cementitious materials (SCMs) on the environmental, mechanical, durability, and microstructural characteristics of mortar mixes. UCW preparation procedure consists of sequential steps of crushing and grinding. Afterward, UCW is thermally activated through incinerating at 750 °C to be promoted to TCW. Experimental work includes mixing mortar mixtures by partially replacing cement with the coal waste binders (UCW and TCW) at different incorporation levels of 4, 8, 12, and 16% of cement weight. Toxicity characteristic leaching procedure (TCLP) test was applied to investigate the environmental impacts of coal wastes. TCLP test results pointed out that heavy metals including manganese, cadmium, lead, and chromium could successfully entrap in the cement matrix. The compressive and flexural strengths as mechanical characteristics of mortar mixtures were determined at 3, 7, 28, 90, and 180 curing days. Moreover, the mortar specimens were immersed in 3% sulfuric acid (H2SO4) for 60 and 150 days. Durability results showed that the H2SO4 attack resistance of binary cement mortars containing 4% coal waste binders performed better than the plain mortar. Based on the scanning electron microscopy (SEM) images, ettringite was found as the main hydration product of binary cement after 28 days; however, the existence of calcium silicate hydrate (CSH) and calcium hydroxide (Ca(OH)2) in the cement matrix after 90 days explains the more compact microstructure attained by using coal waste as cement replacement materials compared to control mixtures.Graphic abstract

Mechanical properties of a mortar with melted plastic waste as the only binder: Influence of material composition and curing regime, and application in Bamako

In recent years, serious environmental problems induced by plastic wastes have drawn considerable attention across the world and new initiatives have been adopted to recycle plastic wastes into construction materials. One of the promising initiatives is the use of plastic waste as the only binding phase to make concrete/mortar-like construction materials. However, how key engineering properties of concrete/mortar-like materials with melted plastic as the only binder change with material composition and curing conditions are not well known. This paper aims to investigate the effect of curing conditions and granular material size on the mechanical properties (compressive and splitting tensile strengths) of a mortar with melted plastic waste (high density polyethylene (HDPE) and low density polyethylene (LDPE)) as the only binder (MPB: mortar with melted plastic waste binder). Moreover, it presents a study conducted in the city of Bamako (Mali) to evaluate the use of MPB to make interlocking paving blocks for use on non-traffic areas in residential or municipal construction projects. Two curing conditions, namely, air dry at ambient temperature and water curing were used for this research. Moreover, the size of the granular materials (sand and gravel) was varied in order to assess its impact on the properties of the corresponding MPB sample formulations with given plastic content and HDPE/LDPE (H/L) ratio. Granular material size and curing conditions were found to have significant impact on the mechanical strengths of the MPB materials. Regardless of age and H/L ratio, the MPB samples cured in water showed lower strength (compressive and tensile) than the specimens cured at ambient temperature under controlled laboratory conditions, while adding coarse granular materials helped to improve these strength properties. Furthermore, the mechanical performance of the proposed MPB-interlocking paver is superior to that of the interlocking Portland cement-based pavers that are commercially available on the Bamako’s market. Moreover, the cost of the Portland cement-less MPB-paver will be substantially lower than that of the Bamako’s commercial Portland cement-paver. The obtained results place this MPB material as a promising candidate for making interlocking pavers or other products, while reducing the amount of plastic waste to be managed and the cost of interlocking pavers.

Mechanical, physical and microstructural properties of a mortar with melted plastic waste binder

The feasibility of using plastic waste as a binding material to develop a new construction material (mortar with plastic waste binder (MPB)) is presented in this paper. Two types of plastic: high density polyethylene (HDPE) and low density polyethylene (LDPE), are combined in three blend (weight) ratios (HDPE/ LDPE of 40/60, 50/50, 60/40) and mixed with sand in four plastic contents (45%, 50%, 60%, and 65%). First, the plastic material is melted in an oven. Then, sand and the melted plastic are thoroughly mixed under a controlled temperature into an homogenous mixture. The mixture is then poured into standardized molds and cured for different periods of time. Mechanical, physical and water absorption tests are performed on the MPB samples after different curing times to assess the influence of the change in the plastic content and the blend ratio (HDPE/LDPE or H/L) on their mechanical and physical properties. Moreover, microstructural analyses and tests are performed on some of the samples for a better understanding of the behavior of this MPB at its microstructure level. The results show that samples with plastic contents of 50% and 60% and a blend ratio of 50/50 have the highest unconfined compressive strength. The same range of plastic content is found to provide the MPB with the highest splitting tensile strength when the H/L blend ratio is equal to 40/60 or 60/40. A relationship between the splitting tensile strength (ft) and the compressive strength is proposed. It is also found that the MPB is more ductile with greater plasticity than conventional mortar materials that use Portland cement. The plastic content and H/L ratio have significant effects on the water absorption, density and microstructure of the mortar. The microstructure of the MPB plays an important role in the development of its strength. This new material has good potential for use as a construction material to recycle plastic waste and reduce the impact of plastic on the environment.

Retraction Note: Resistance to acid attack, abrasion and leaching behavior of alkali-activated mine waste binders

Retraction Note: Resistance to acid attack, abrasion and leaching behavior of alkali-activated mine waste binders

Evaluation of Novel Ornamental Cladding Resistance, Comprised of GFRP Waste and Polyester Binder, within an Acid Environment

The paper presents the manufacturing technology for a material obtained from glass fiber waste, quartz sand, and polyester binder, used for ornamental building plates. The composite has a cover surface that ensures protection of the material from environment attacks and a structural material that can be subjected to chemical degradation. The mechanical properties of the obtained material were experimentally investigated through compressive mechanical tests. To observe the material’s behavior in contact with external agents (rain or acid rain, due to environmental pollution), analyses were performed in laboratory conditions. An investigation on the effects of chemical attack substances was conducted. SEM and macroscopic analyses were performed, and the surface roughness was determined for each sample area. The obtained results were statistically analyzed and showed that there is no significant difference between the surface roughness for treated and untreated samples. Furthermore, the surfaces were analyzed by X-ray diffraction and mineralogical optical microscopy in polarized light with crossed nicols. It was observed that rainwater does not affect the plate structure even if the plates are used in high-pollution environments. The material is suitable for exterior building walls from the point of view of chemical attack and resistance.

The effect of polyurethane binder and glass fiber reinforcement on physical and mechanical properties of mahogany (Swietenia mahagoni) leaves waste biocomposite

In this work, the effect of polyurethane binder and glass fiber as reinforcement on the physical and mechanical properties of mahogany (Swietenia mahagoni) leaves waste as biocomposite was investigated. Mahogany leaves waste has been successfully synthesized into a strong and lightweight biocomposite material by using a polyurethane binder and glass fiber as reinforcement. The mass content of polyurethane was varied between 0.25?1.50 g to obtain the optimum conditions. The contents of glass fiber added were between 0.1?0.5 g for biocomposite reinforcement. The addition of polyurethane and glass fiber mass fraction on biocomposite from mahogany leaves waste affected the physical and mechanical properties. The optimum ratio of mahogany leaves waste and polyurethane binder to produce biocomposite showed a compressive strength of 41.59 MPa, a density of 1.060 g/cm3, water absorption of 6.98%, and a thickness development of 7.27%. The addition of glass fiber material was proven to increase the compressive strength of biocomposites to 57.68 MPa. The addition of glass fiber to biocomposites also succeeded in improving physical properties. The testing of glass fiber reinforced biocomposites resulted in a density of 1.140 g/cm3, water absorption of 5.42%, and thickness development of 8.18%.

ОПИЛКОБЕТОН НА БЕСЦЕМЕНТНОМ КОМПОЗИЦИОННОМ ВЯЖУЩЕМ

Abstract. The role and advantages of products based on a non-cement binder using wood waste compared to other types of materials and technologies are considered. The purpose of this work was to obtain a heat insulation material based on wood processing waste and non-cement binder. The cement-free binder material using sawdust as an aggregate is effective under real-world production conditions.