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Catalina Mihaela Grădinaru
Transilvania University of Bra.ov, Faculty of Civil Engineering, 5 Turnului Street, 500152 Bra.ov, Romania

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Journal article
Published: 27 March 2020 in Sustainability
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In the last few years, the building industry experienced a significant development as a response to the demographic growth of human society and to the increasing demand for housing. Their construction involves the traditional use of concrete as a material that provides added strength to the finished building. This is manufactured respecting standard recipes depending on the way of its use. Anyway, all concrete recipes involve the use of mineral aggregates extracted from the riverbed, as is happening in Romania, or rock blocks crushing, as reported in other countries. Under these conditions, the rationalization of the use of natural mineral resources and the identification of new possibilities to reduce their consumption through their replacement with vegetal waste has become an important research issue. In this study, two types of vegetal waste—namely, shredded corn cobs and sunflower stalks—were used to manufacture novel ecological concretes. The vegetal wastes, both in untreated and treated forms (with 20% and 40% of sodium silicate solution), were used to replace 50% of the river (mineral) aggregate volume. The obtained concretes were tested, and the values of some important parameters in the concrete characterization (such as bulk density, water adsorption capacity, compressive strength and splitting tensile strength) were compared with the concrete contains cement CEM II/A-LL 42.5R. The obtained results show that these vegetal wastes have the potential to be used in the manufacturing of new ecological concrete. In addition, this alternative material meets the requirements for the sustainable and healthy development of the environment, offering low-polluting solutions in the context of an increasing demand for constructions.

ACS Style

Cătălina Mihaela Grădinaru; Radu Muntean; Adrian Alexandru Șerbănoiu; Vasilică Ciocan; Andrei Burlacu. Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production. Sustainability 2020, 12, 2651 .

AMA Style

Cătălina Mihaela Grădinaru, Radu Muntean, Adrian Alexandru Șerbănoiu, Vasilică Ciocan, Andrei Burlacu. Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production. Sustainability. 2020; 12 (7):2651.

Chicago/Turabian Style

Cătălina Mihaela Grădinaru; Radu Muntean; Adrian Alexandru Șerbănoiu; Vasilică Ciocan; Andrei Burlacu. 2020. "Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production." Sustainability 12, no. 7: 2651.

Journal article
Published: 01 January 2020 in Environmental Engineering and Management Journal
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ACS Style

Catalina Mihaela Grădinaru; Adrian Alexandru Serbanoiu; Petru Mihai; Gabriel Constantin Sarbu; Radu Muntean. SYNERGIC EFFECTS OF SUNFLOWER STALKS AND SODIUM SILICATE IN DEVELOPING AN ECOLOGICAL CONCRETE. Environmental Engineering and Management Journal 2020, 19, 75 -84.

AMA Style

Catalina Mihaela Grădinaru, Adrian Alexandru Serbanoiu, Petru Mihai, Gabriel Constantin Sarbu, Radu Muntean. SYNERGIC EFFECTS OF SUNFLOWER STALKS AND SODIUM SILICATE IN DEVELOPING AN ECOLOGICAL CONCRETE. Environmental Engineering and Management Journal. 2020; 19 (1):75-84.

Chicago/Turabian Style

Catalina Mihaela Grădinaru; Adrian Alexandru Serbanoiu; Petru Mihai; Gabriel Constantin Sarbu; Radu Muntean. 2020. "SYNERGIC EFFECTS OF SUNFLOWER STALKS AND SODIUM SILICATE IN DEVELOPING AN ECOLOGICAL CONCRETE." Environmental Engineering and Management Journal 19, no. 1: 75-84.

Journal article
Published: 01 January 2020 in Environmental Engineering and Management Journal
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ACS Style

Radu Muntean; Catalina Mihaela Grădinaru; Adrian Alexandru Serbanoiu; Gabriel Constantin Sarbu. IMPROVED CONCRETE BLOCKS WITH DISPERSED FIBERS AS CONTRIBUTION FOR ENVIRONMENTAL PROTECTION. Environmental Engineering and Management Journal 2020, 19, 85 -94.

AMA Style

Radu Muntean, Catalina Mihaela Grădinaru, Adrian Alexandru Serbanoiu, Gabriel Constantin Sarbu. IMPROVED CONCRETE BLOCKS WITH DISPERSED FIBERS AS CONTRIBUTION FOR ENVIRONMENTAL PROTECTION. Environmental Engineering and Management Journal. 2020; 19 (1):85-94.

Chicago/Turabian Style

Radu Muntean; Catalina Mihaela Grădinaru; Adrian Alexandru Serbanoiu; Gabriel Constantin Sarbu. 2020. "IMPROVED CONCRETE BLOCKS WITH DISPERSED FIBERS AS CONTRIBUTION FOR ENVIRONMENTAL PROTECTION." Environmental Engineering and Management Journal 19, no. 1: 85-94.

Articles
Published: 26 February 2019 in Journal of Agricultural and Environmental Ethics
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In an increasingly urbanized world, construction industry is called upon to serve the needs of human society, such as environmental protection and safety in terms of infrastructure. In this context, a sustainable and ethical development means a close connection between buildings and environment. This connection can be achieved through, for example, the concept of ecological concrete or green concrete, as it is often called. The conventional process of obtaining cement and mineral aggregates from the concrete composition generates pollution, especially through greenhouse gas emissions. Also, one should not ignore the fact that extraction of the raw materials affects the habitats of the sites and of the neighboring areas. When construction materials are questioned, the ethical issues lay not in the means of expression, but mainly in the means of production. More to the point, the present contribution aimed to find solutions for enhancing the adhesion of vegetal aggregates with the cement matrix, in order to obtain a material with optimal mechanical properties, which is valued as an ethical approach of building industry. Results showed that plant aggregates can be used to obtain a building material which can be improved by using partial substitution of cement by silica fume, fly ash, or by using additives (sodium silicate and air entraining additive) and that green concrete as an environmentally friendly material offers the alternative for lower energy use and fewer CO2 emissions. Marketers must understand not only the advantages of these green materials, but also that they have an ethical commitment to provide consumers with environmentally friendly materials.

ACS Style

Catalina Mihaela Grădinaru; Adrian Alexandru Şerbănoiu; Danut Traian Babor; Gabriel Constantin Sârbu; Ioan Valentin Petrescu-Mag; Andrei Cristian Grădinaru. When Agricultural Waste Transforms into an Environmentally Friendly Material: The Case of Green Concrete as Alternative to Natural Resources Depletion. Journal of Agricultural and Environmental Ethics 2019, 32, 77 -93.

AMA Style

Catalina Mihaela Grădinaru, Adrian Alexandru Şerbănoiu, Danut Traian Babor, Gabriel Constantin Sârbu, Ioan Valentin Petrescu-Mag, Andrei Cristian Grădinaru. When Agricultural Waste Transforms into an Environmentally Friendly Material: The Case of Green Concrete as Alternative to Natural Resources Depletion. Journal of Agricultural and Environmental Ethics. 2019; 32 (1):77-93.

Chicago/Turabian Style

Catalina Mihaela Grădinaru; Adrian Alexandru Şerbănoiu; Danut Traian Babor; Gabriel Constantin Sârbu; Ioan Valentin Petrescu-Mag; Andrei Cristian Grădinaru. 2019. "When Agricultural Waste Transforms into an Environmentally Friendly Material: The Case of Green Concrete as Alternative to Natural Resources Depletion." Journal of Agricultural and Environmental Ethics 32, no. 1: 77-93.

Conference paper
Published: 19 September 2018 in IOP Conference Series: Materials Science and Engineering
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Concrete is a large-scale building material with an important impact on environment mainly due to the production technology of cement and also because it consumes depleting mineral resources as aggregates. Therefore, it is necessary to find ways to replace some of its components in order to diminish its pollution effect. One of these is the partial replacement of cement with other cementitious materials and/or the replacement of mineral aggregates with renewable ones. The aim of this study was to investigate the effects on density, compressive strength, and split tensile strength of the concrete in the case of cement replacement by fly ash in a proportion of 10%, 20% and 30% of the volume, in the case of aggregates replacement by 20% of the volume with aggregates made of waste, and then these two cases combined. Even if the experimental results revealed the decrease of mechanical properties by replacing cement and the mineral aggregates, the smaller density of the developed concretes represents an important advantage.

ACS Style

Catalina Mihaela Grădinaru; M Barbuta; V Ciocan; A A Serbanoiu. A study on the effects of the cement and mineral aggregates replacement with waste materials. IOP Conference Series: Materials Science and Engineering 2018, 399, 012020 .

AMA Style

Catalina Mihaela Grădinaru, M Barbuta, V Ciocan, A A Serbanoiu. A study on the effects of the cement and mineral aggregates replacement with waste materials. IOP Conference Series: Materials Science and Engineering. 2018; 399 (1):012020.

Chicago/Turabian Style

Catalina Mihaela Grădinaru; M Barbuta; V Ciocan; A A Serbanoiu. 2018. "A study on the effects of the cement and mineral aggregates replacement with waste materials." IOP Conference Series: Materials Science and Engineering 399, no. 1: 012020.

Conference paper
Published: 19 September 2018 in IOP Conference Series: Materials Science and Engineering
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In order to protect the environment and to reduce its pollution, the concrete greening is an important objective to accomplish this goal. Research across the world has expanded to replace some components of concrete with different kinds of alternative ecological materials, including agricultural materials that are readily renewable resources. They may partially replace the mineral aggregates, if they are used in a shredded form, and / or the cement from the concrete composition, if the ash resulting from their combustion is used. When used as an alternative of mineral aggregates, plant aggregates generally have a number of disadvantages, which requires finding a solution which reduces their water absorption, improves the interface between them and the cement matrix, and gives them durability in the resulting concrete. The present study investigated the effect of sodium silicate on plant aggregates made of shredded corn cobs, and on the concrete manufactured with this type of material as a replacement of mineral aggregates by 20%, 50% and 80% by volume. Experimental results revealed that sodium silicate reduced the water absorption of the grounded corn cobs, resulting a lightweight concrete with improved compressive and tensile strength compared to those of the concrete manufactured with untreated plant aggregates. The use of sodium silicate as a concrete additive resulted in an increase of the compressive strength of the concrete manufactured with 50% by volume corn cob aggregates, of the splitting strength in the case of concrete with 20% and 80% by volume vegetal aggregates, and of the density of the concrete manufactured with the highest percentages of plant aggregates which were investigated in this study.

ACS Style

Catalina Mihaela Grădinaru; M Barbuta; V Ciocan; E Antohie; D Babor. The effects of sodium silicate on corn cob aggregates and on the concrete obtained with these agricultural waste. IOP Conference Series: Materials Science and Engineering 2018, 399, 012021 .

AMA Style

Catalina Mihaela Grădinaru, M Barbuta, V Ciocan, E Antohie, D Babor. The effects of sodium silicate on corn cob aggregates and on the concrete obtained with these agricultural waste. IOP Conference Series: Materials Science and Engineering. 2018; 399 (1):012021.

Chicago/Turabian Style

Catalina Mihaela Grădinaru; M Barbuta; V Ciocan; E Antohie; D Babor. 2018. "The effects of sodium silicate on corn cob aggregates and on the concrete obtained with these agricultural waste." IOP Conference Series: Materials Science and Engineering 399, no. 1: 012021.

Journal article
Published: 27 August 2018 in Journal of Cleaner Production
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In the context of an urban environment assaulted by noise from different sources, the possibility of using composite materials made of concrete and various materials considered as waste was investigated, for the purpose of using them in acoustic barriers. Five different types of sustainable concrete have been developed, incorporating polystyrene granules, polyethylene terephthalate granules, corn cob granules, shredded sunflower stalk and balls made of sheep wool. Two different thicknesses were adopted, of 40 mm and 80 mm. The influence of the material's thickness was investigated. For these materials, the acoustic absorption coefficient was determined, using Feng's modified procedure of the ISO 10534:1998 standard. The sound absorption coefficient's meaning suffers changes and its measured value can be considered the real one, smaller than the usual reported standard values. Each of the sustainable concrete has sound absorption coefficients higher than those of the conventional concrete. The results highlighted that these types of materials represent a sustainable solution for both waste and noise problems of our cities.

ACS Style

Irina Oancea; Carmen Bujoreanu; Mihai Budescu; Marcelin Benchea; Catalina Mihaela Grădinaru. Considerations on sound absorption coefficient of sustainable concrete with different waste replacements. Journal of Cleaner Production 2018, 203, 301 -312.

AMA Style

Irina Oancea, Carmen Bujoreanu, Mihai Budescu, Marcelin Benchea, Catalina Mihaela Grădinaru. Considerations on sound absorption coefficient of sustainable concrete with different waste replacements. Journal of Cleaner Production. 2018; 203 ():301-312.

Chicago/Turabian Style

Irina Oancea; Carmen Bujoreanu; Mihai Budescu; Marcelin Benchea; Catalina Mihaela Grădinaru. 2018. "Considerations on sound absorption coefficient of sustainable concrete with different waste replacements." Journal of Cleaner Production 203, no. : 301-312.

Proceedings article
Published: 20 June 2017 in 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies
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ACS Style

Catalina Mihaela Grădinaru. HEALTH AND ENVIRONMENTAL EFFECTS OF HEAVY METALS RESULTED FROM FLY ASH AND CEMENT OBTAINING AND TRIALS TO REDUCE THEIR POLLUTANT CONCENTRATION BY A PROCESS OF COMBINING-EXCLUSION. 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies 2017, 1 .

AMA Style

Catalina Mihaela Grădinaru. HEALTH AND ENVIRONMENTAL EFFECTS OF HEAVY METALS RESULTED FROM FLY ASH AND CEMENT OBTAINING AND TRIALS TO REDUCE THEIR POLLUTANT CONCENTRATION BY A PROCESS OF COMBINING-EXCLUSION. 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies. 2017; ():1.

Chicago/Turabian Style

Catalina Mihaela Grădinaru. 2017. "HEALTH AND ENVIRONMENTAL EFFECTS OF HEAVY METALS RESULTED FROM FLY ASH AND CEMENT OBTAINING AND TRIALS TO REDUCE THEIR POLLUTANT CONCENTRATION BY A PROCESS OF COMBINING-EXCLUSION." 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies , no. : 1.

Proceedings article
Published: 20 June 2017 in 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies
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ACS Style

Catalina Mihaela Gradinaru. CHARACTERIZATION OF A LIGHTWEIGHT CONCRETE WITH CORN COB AGGREGATES. 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies 2017, 1 .

AMA Style

Catalina Mihaela Gradinaru. CHARACTERIZATION OF A LIGHTWEIGHT CONCRETE WITH CORN COB AGGREGATES. 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies. 2017; ():1.

Chicago/Turabian Style

Catalina Mihaela Gradinaru. 2017. "CHARACTERIZATION OF A LIGHTWEIGHT CONCRETE WITH CORN COB AGGREGATES." 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies , no. : 1.

Journal article
Published: 01 January 2017 in Environmental Engineering and Management Journal
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ACS Style

Marinela Barbuta; Adrian Alexandru Serbanoiu; Andrei Burlacu; Catalina Mihaela Gradinaru. FLY ASH CEMENT CONCRETE WITH STEEL FIBERS - COMPARATIVE STUDY. Environmental Engineering and Management Journal 2017, 16, 1123 -1128.

AMA Style

Marinela Barbuta, Adrian Alexandru Serbanoiu, Andrei Burlacu, Catalina Mihaela Gradinaru. FLY ASH CEMENT CONCRETE WITH STEEL FIBERS - COMPARATIVE STUDY. Environmental Engineering and Management Journal. 2017; 16 (5):1123-1128.

Chicago/Turabian Style

Marinela Barbuta; Adrian Alexandru Serbanoiu; Andrei Burlacu; Catalina Mihaela Gradinaru. 2017. "FLY ASH CEMENT CONCRETE WITH STEEL FIBERS - COMPARATIVE STUDY." Environmental Engineering and Management Journal 16, no. 5: 1123-1128.

Journal article
Published: 01 January 2017 in Procedia Engineering
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ACS Style

Marinela Barbuta; Dan Diaconu; Adrian Alexandru Serbanoiu; Andrei Burlacu; Alexandru Timu; Catalina Mihaela Gradinaru. Effects of Tire Wastes on the Mechanical Properties of Concrete. Procedia Engineering 2017, 181, 346 -350.

AMA Style

Marinela Barbuta, Dan Diaconu, Adrian Alexandru Serbanoiu, Andrei Burlacu, Alexandru Timu, Catalina Mihaela Gradinaru. Effects of Tire Wastes on the Mechanical Properties of Concrete. Procedia Engineering. 2017; 181 ():346-350.

Chicago/Turabian Style

Marinela Barbuta; Dan Diaconu; Adrian Alexandru Serbanoiu; Andrei Burlacu; Alexandru Timu; Catalina Mihaela Gradinaru. 2017. "Effects of Tire Wastes on the Mechanical Properties of Concrete." Procedia Engineering 181, no. : 346-350.