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The aim of this study was to analyze the density, compressive strength, tensile strength and the freeze-thaw resistance of a cement micro concrete made with sunflower stalks that replaced 20%, 35%, 50%, 60%, 80% and 100% of the sand from its composition. The results showed, in general, a decrease of the analyzed properties, but the use of 20% and 35% sunflower stalk aggregates led to the improvement of the splitting tensile strength. A significant advantage of this type of micro concrete was its density, being obtained a lightweight building material, with up to 822 kg/m3.
C M Gradinaru; A A Serbanoiu; Radu Muntean. The mechanical properties and the freeze-thaw resistance of an ecological micro concrete made with sunflower stalks. IOP Conference Series: Materials Science and Engineering 2020, 789, 012021 .
AMA StyleC M Gradinaru, A A Serbanoiu, Radu Muntean. The mechanical properties and the freeze-thaw resistance of an ecological micro concrete made with sunflower stalks. IOP Conference Series: Materials Science and Engineering. 2020; 789 (1):012021.
Chicago/Turabian StyleC M Gradinaru; A A Serbanoiu; Radu Muntean. 2020. "The mechanical properties and the freeze-thaw resistance of an ecological micro concrete made with sunflower stalks." IOP Conference Series: Materials Science and Engineering 789, no. 1: 012021.
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.
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 StyleCătălina 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 StyleCătălina 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.
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.
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 StyleCatalina 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 StyleCatalina 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.