In a global context where sustainability is becoming priority in construction, this paper analyzes the use of composite materials based on clay and plant waste, offering an ecological alternative to conventional materials. This article mechanical properties made from with walnut shell inserts, shredded biomass corn stalks, wheat straw, wool waste. These are developed for sustainable rural construction. The study evaluates flexural compressive strength measurements at varying insert...

The article describes the results of research carried out for systemic description manufacturing technological processes composite materials with clay matrix and insert from agricultural waste. objectives these researches include valorization waste cheap abundant resources to obtain usable in civil constructions or various rural developments, properties superior existing ones, example adobe bricks. used, technology obtaining, dependence between output parameters input control parameters.

The paper presents a mathematical model that characterizes the process of threshing and separation from machine with an axial flow thresher, taking into account following input parameters: material flow, rotor speed, distance between counter rotor, mean density processed material, feed length thresher separating surface. Output parameters, such as distribution function separated seeds, seeds free in space, well unthreshed together value evacuation losses, were used to control modeling process.

The article continues the exposition of results obtained in researching an agricultural machine for processing soil, designed research with applications including exploitation. MCLS (complex soil tillage) was to working processes instruments intended processing. cultivator is a modulated (it can work three widths: 1, 2, and 4 m, tractors different powers) that use wide range bodies. experimental data structure width 1 m their within framework theory random vibrations are presented this...

Our paper presents the hammer mill working process optimization problem destined for milling energetic biomass (MiscanthusGiganteus and Salix Viminalis). For study, functional constructive parameters of were taken into consideration in order to reduce specific energy consumption. The consumption dependency on rotor spinning frequency sieve orifices use, as well material feeding flow, correlation with vegetal degree was focus analysis. obtaining this successively equipped 4 different types...

The aim of the study was to identify new mathematical models and strategies that can characterize behavior pollutants accumulating in soil over time, considering special characteristics these chemicals cannot be degraded or destroyed easily. paper proposes a statistical model for assessing accumulation Zn lettuce (Lactuca sativa L.), based on three indicators development plants time. experimental data used obtain interpolated variations mass increase functions determine several express time...

This paper presents theoretical and experimental research studying the influence of process parameters on quality biomass pellets. A validated mathematical model was developed, expressing density pellets as determined by moisture content, compression pressure, heat, initial material, pelleting speed volume material. The experiments for determining these into optimizing were conducted a heated single pellet device, using fir sawdust raw To describe study process, four input control varied—raw...

The article continues the exposition of results obtained in research an agricultural machine for processing soil, designed with applications including exploitation. MCLS complex cultivator was working processes instruments intended soil processing. is a modulated (it can work three widths: 1, 2, and 4 m, tractors different powers) that to use wide range bodies.
 experimental data structure width 1 m their within framework theory random vibrations are presented this article. analysed as...

The article presents the results of preliminary experiments necessary for foundation an experimental method that ensures design and manufacturing technology a category composite materials with mud matrix agricultural waste insertion. resources physico-chemical properties as well physical potential constituents insertion in material are presented. technological variant manufacture finished product is also presented, consisting compression system mixture paste state until solidification...

The article presents results obtained for the thermal characterization of composite materials with clay matrix and inserts from agricultural waste (MCMLIDA). experiments carried out led to estimation coefficient conductivity bricks made MCMLIDA material. have physical properties dependent on parameters manufacturing process, one most important being concentration insert. were tested eleven insert concentrations four types (maize cobs, walnut husks, wheat straw, wool). Only first two had...

The research aims to estimate the influence of main vibration sources in grain harvesters on combine operator. study also has a comparative aspect, including two harvesters, conventional one (C 110H) and with an axial flow (CASE IH). considered were thresher, chassis, header for both types addition shaker as source harvester. receiver is be operator's seat. emission spectra each are recorded according ISO 2631-1:2001 2631-5:2018, well spectrum received at To seat, interspectral correlations...

Heavy metals are naturally occurring elements, but their various applications have led to wide circulation in the environment, raising concerns over latent effects on environment and human health. Their toxicity depends numerous factors, including chemical species, concentration of heavy metal ions, environmental etc. Experimental studies single or cumulative plants complex, time consuming difficult conduct. An alternative is mathematical modeling, which can include different factors into an...

The empirical and theoretical estimation of the draft force agricultural machinery for soil tillage, has been target scientific research about one hundred years. results obtained so far may seem contradictory or divergent. article presents some on usual calculation formulas machines tillage. Although apparently these are different, analyzing structure formula, we find cohesion coherence embodied in a simple generalization easy to use both experimental. Moreover, convertible between them, two...

The article presents results of the testing some physical laws phenomenon interaction between soil and working parts agricultural machines destined to tillage.The authors try, gradually, clarify quality approximation tillage draft forces machines, offered by multitude mathematical models their variants from literature.The presented material reflects situation that consider be characterized, apparently, heterogeneity regarding use formulas for force.In essence, a disputed response practical...

Abstract The article presents how to approach the structural analysis of a modulated load- bearing structure (MLBS) for researching interaction between soil and working parts agricultural machines. special approach, in relation usual structures, is due fact that supporting modulated, multifunctional one and, consequently, all modular types operation must be tested. analyzed hypothesis loads maintain demands materials used characteristic range linear elasticity, because expected work such...

This paper presents results regarding the variation of qualitative parameters organic fertilizer machines according to material and control, working regime. These are obtained from mathematical models that interpolate experimental data. The functions thus allow investigation existence optimal regimes and, if confirmed, identification these operating modes (of control parameter set: rotational speed, inclination angles, flow rate, etc.). analysis can be extended other types agricultural...

The article proposes a method for extracting the main characteristics of machines deep soil tillage using as sources only leaflets and public technical documentation provided by manufacturers.The consists in statistical analysis quantitative numerical manufacturers development original calculation criteria (formulas) order to rank performances.Methodology results consist ranking performances that can be used two purposes: selection, consultants or potential users, equipment appropriate...

The investigation on the unpredictability of distribution traction resistance forces working bodies a specific type MCLS complex cultivator is presented in paper. validation random character force that loads active used to indicate mathematical model must be followed for research soil processing system. Also, results elucidate some hypotheses issued conception and design machine: more intense load from lines located immediately after tractor, existence are constantly intensively requested...

The results presented in this article, refer to a more precise qualitative and quantitative estimation of the friction phenomenon, working process agricultural machines, for soil processing. positive role has been taken into consideration, namely help drive machinery properly disintegrate soil, as well negative friction, which generate wear tools, high energy consumption pollution [1, 2]. It is proposed give accurate estimate weight terms expressing implicitly producing wear, formula...

The paper presents a modified version of the mathematical model heavy metal transfer process.The changes start from beliefs authors that factors govern plant's evolution (germination, growth and vegetative development, senescence death) are environmental (structure chemical composition soil air, their humidity, pH, lighting, applied fertilization, meteorological events, etc.) not time.Time is an artificial parameter introduced to provide simpler reporting dynamic processes.We do know if time...

The paper presents experimental results obtained in the study of heavy metals transfer from soil to vegetables. experiments for which raw and statistically processed data are presented this preliminary within an extensive research program plant behaviour soils contaminated with metals. These underlie development primary statistical mathematical models that also paper. will form basis far more consistent follow plants throughout life cycle. facilitate extracting important conclusions about...

In this paper, a few assessments of the optimal parametric combinations in operating regime agricultural aggregates with ploughs variable width are made. The starting point was from classic expression tillage draft force required for traction. order to find points, some problems constrained extreme have been formulated. Extremes provided by working and speed found. Such points existed literature, about half century. Using these theoretical estimates sought, possibilities their experimental...