As for the composites reinforced with 30 vol% hemp fabric, it was noted a larger number of broken fibers and holes characteristic of pulled out fibers, which could be related to greater interaction of the hemp fibers in the fabric with the epoxy matrix. Table 5 shows the ANOVA for the tensile strength of the composites. According to the values in this table, it is possible to state, with 95% confidence, that the tensile strength averages are different since the F > Fc . The HSD results for the tensile test are shown in Table 6. Based on the obtained HSD, all the values were considered statistically different. Therefore, it confirms the initial hypothesis that the 30 vol% hemp fabric epoxy composites exhibited the highest tensile strength in comparison to all tested conditions. As a material for engineering application, the results presented for hemp fabric reinforced epoxy composite disclose a potential substitute for common composites reinforced with glass fiber. Indeed, the epoxy matrix reinforced with 30 vol% of glass fibers reveals a specific tensile strength of 64.5 MPa$cm3 /g. Comparatively, it is only about 40% higher than that for hemp fabric reinforced epoxy composites .The hemp plant and the building industry have a lot in common, especially when it is about sustainability. At the European Union level, the construction industry is answerable to 35% of the GHG-greenhouse gases emissions, 30% of the water consumption and waste generation, 42% energy consumption, and the highest percent is 50% of the extracted materials. Therefore, the concept of sustainability in the construction sector tries to find solutions to develop the materials building market in the way in which the future of the coming generations will not be compromised, as Brundtland report defines development in 1987 – to make development sustainable to ensure that it meets the needs of the present without compromising the ability of future generations to meet their own needs.

The increasing needs to develop and deepen the research on sustainable materials, which can be defined as building products with low density, hydroponic grow tent composed of affordable raw materials and which have a positive impact on the environment are made in order to find solutions to use the materials as naturally as possible to reduce energy consumption during transport and processing and help retain a higher percentage of CO2 in the environment where they are located. However, finding solutions to decrease the 50% of extract materials connects more the building sector with the agricultural one, in the pursue of two of the main goals of sustainable development: number 11- sustainable cities and communities by implementing affordable building materials and number 12- responsible consumption and production which can be focus on decreasing the percentage of extract raw materials. In the last years, many studies were made in the sector of building materials having a perspective on the raw materials derived from the agricultural sector, as hemp, flax, jute, and so on, which can represent an alternative to the natural extracted materials. For this reason the research is focused on the hemp plant, finding a proper composition which can respond to three aspects: improving the impact upon the unwanted sounds, decreasing the energy consumption and obtaining a composite which reduce the percentage of the extract materials. The hemp plant is known as Cannabis sativa L., which has a low concentration of THC, and allows the plant to be cultivated for the seed and fiber, without having psychoactive effects as marijuana. It is a plant which grows rapidly, having an annual regeneration rate. The hemp plant is used for the seeds, fiber and shiv. The seeds are used especially in the food and cosmetics industry, while the fibers are more met in the paper, textiles, automobiles industry.

The hemp shiv represents the highest percentage from the plant and it is considered a form of waste obtained after the extraction process of the fibers. The shiv is used for bedding and recently, after 1990 in the building industry. Today, more than 25000 products have in their composition hemp elements. One hectare of the hemp culture for fiber represents 6 to15 kg of dry plant from which it results 75% of hemp shiv, 20% of long fibers and 5% dust. In the scientific literature the hemp plant, shiv or fiber, or both of them, are found in mixtures with various natural or artificial binders, to obtain hemp based composited building materials which have the role to decrease the negative percentages on the enviroment of the building industry. Regarding the building materials based on hemp and cement, the scientific literature presents the study of Guillaume Delannoy which compared the composition of the hemp shiv with a binder based on cement and one with lime and showed that the acoustic, thermal and hydric properties of the compositions are similar, Hakamy analyzed the characteristics of hemp fabric reinforced nanoclay–cement nanocomposites, Balčiūnas studied the impact of hemp shives aggregate mineralization on the physical–mechanical properties and structure of composite with cementitious binding material, Çomak deepens in the subject of the effects of hemp fibers on the characteristics of cement based mortars, Hamzaoui analyzed the mechanical performance of mortars modified with hemp fibres, shiv and milled fly ashes and Balčiūnas presented a paper about the physical properties and structure of composites made from hemp hurds and different binding materials. Starting from the studies presented in the literature, the present research discusses more in-depth the composition of hemp elements and white cement and identifies the acoustical and thermal properties of the hemp based building materials.The sound absorption coefficients of the hemp based building materials are presented in Figure 5 and 6. The values of the acoustic parameter are presented in the diagrams 5a and 6a on a frequency spectrum from 50-6400 Hz and on the diagrams 5b, respectively 6b, on standardized frequency bands. In the first diagram, Figure 5a, the two curves of the sound absorption coefficient of the composition with fiberblue line and the composition with shiv- orange line can be noticed. After evaluating the values of the samples, the most performing composition is the one based on fibers which present the highest point of absorption at 90% on the 1500 Hz frequency. At the frequency of 2500 Hz, the monolayer composition with fibers and cement solution presents the lowest value on the interval between 500-6400Hz of sound absorption which is around 65%.

The sound absorption coefficient for the monolayer sample with shiv presents a maximum of absorption of the sound on the frequency of 1000Hz around 80%. From de 1000Hz until 6400 Hz the lowest value of the sound absorption is around the frequency of 2000Hz where only 45% of the sound is absorbed. For the results of the sound absorption coefficients presented on the standardized frequency bands, Figure 5b, it can be noticed that the both samples have similar values on the average frequency of 1000Hz, but a substantial difference is recorded on the 500Hz frequency where the shiv sample presents less than 30% sound absorption comparative with the fiber sample. Sustainable building materials are considered materials which have a minimum impact on the built and natural environment. These materials are designed to accomplish economic, social and environmental performances and also to contribute to reduce the energy consumption, to avoid the utilization of the limited natural resources and to have a positive impact on the environment and human life. Every type of sustainable building materials is defined by three major stages in its life cycle time: the pre-building stage, when a material is manufactured , the in-building stage when the product is used in a building and post-building stage when a material is disposed of . Researchers who are studying the building materials emphasize the fact that since the preconstruction stage it is necessary to design a material which has a positive impact on the environment. For this reason, the focus of the scientific studies in the last years is to establish a connection among different sectors, such as the agricultural and building sector. The raw materials coming from the agricultural sector together with different binders can represent an alternative to the synthetic building materials.The two components allow the production of a bio based building material. The presence of the earth-clay in the building industry is considered the most natural and friendly binder for the environment. It has been used as a building material since ancient times because of the characteristics that it shows: availability, low carbon footprint, low embodied energy, but also clay is considered a natural humidity regulator due to the fact that it has the capacity to transfer and store the heat and the moisture,cheap grow tents which contribute to a high heat capacity. This binder can usually represent also a waste from the construction sector, coming from the foundation of a building and it is completely recyclable. The hemp plant is known especially for the fiber in the textile sector, but in the last years many studies were made on hemp shiv which represents the woody core of this plant. The potential of the hemp shiv in the construction sector is due to the fact that this natural resource shows a high porosity which has a low density. The hemp shiv components are defined by cellulose , hemicellulose , lignin and other compounds.

To complete a wider investigation on the acoustic, thermal and mechanical properties of hemp-clay building materials, several studies about these bio-based materials were found in the scientific literature. Degrave-Lemeurs studied the acoustical properties of the hemp-clay concrete which showed that the concentration of the hemp influence upon the acoustic parameters, while the clay type and the binder fluidity did not have any effect. Mechanical properties of the hemp clay building materials were studied by Mazhoud and Brummer. Mazhoud observed that all the samples had a ductile behavior and the resistances strongly depend on the hemp to binder ratio.Brummer concluded the work by mentioning that in different mixtures of hemp and clay, stabilized with lime, varieties of hemp influence the recipes that need to be adequate to obtain the maximum performance. Relative to the mechanical properties, the use of lime for the stabilization of the mixture decreased the compressive strength and increased the flexural strength. The thermal conductivity of the hemp-clay building materials was analyzed by Bursbridge. The mixture between hemp and clay is not very used in the construction sector; for this reason there is a small number of studies that analyze the physical properties of the hemp-clay building materials.The agricultural industry uses pesticides to optimize food protection for the growing human population . Once crops are infected by fungi, no curative treatment is actually available, leading to crop loss. As a consequence, preventive treatments are often applied. Among treatment options, triazole-based formulations are preferred in agriculture because they specifically target fungi . Triazole molecules are broad-spectrum fungicides used for disease control in cereals, vegetables, fruits and other field crops . They represent 26.1% of total fungicides sales for agriculture and horticulture in Europe, with 31 molecules available . However, triazole molecules do not only control the targeted pathogenic fungi, such as the species responsible for septoria, fusarium ear blight and rust, but have also unintended impacts on other nonphytopathogenic fungi . Among them, Aspergillus fumigatus is a collateral damage especially worrying. This fungus causes invasive aspergillosis in immunocompromised patients, an invasive fungal infection with a mortality rate of 50% which can reach 100% in cases of infections involving antifungal resistant strains. Medical triazole antifungal drugs are indeed used to treat patients, but many cases of antifungal resistance have been reported for 20 years. Two routes of resistance selection are described: the first is linked to the long-term treatment of patients , the second is likely caused by fungicides largely used in the environment for crop protection . Triazole molecules used in medicine and agriculture have similar chemical structures as showed in Scheme 1. Thus, resistant strains with spontaneous mutations are selected byfungicides, or sensitive strains can become resistant through phenotypic plasticity . These environmental resistant strains, in contact with fungicides in fields, would be also resistant to antifungal therapies .