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| Registros recuperados: 10 | |
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| Ferreira,Regis de C.; Cunha,Ananda H. N.. |
| ABSTRACT Residues from agricultural activity can be used to improve the quality of soil-based bricks, constituting an interesting alternative for their destination. The technical quality of soil-cement-plant residue bricks was evaluated by the combination of non-destructive and destructive methods. A predominant clayey soil, Portland cement and residues of husks of both rice and Brachiaria brizantha cv. Marandu (0, 10, 20, 30 and 40%, in mass, in substitution to the 10% cement content) were used. The bricks were submitted to destructive (water absorption and compressive strength) and nondestructive (ultrasound) tests for their physical and mechanical characterization. Results from both destructive and non-destructive tests were combined to determine the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil stabilization; Rice husk; Anisotropic resistance. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000800543 |
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| Perin, Lais; Peil, Roberta Marins Nogueira; Höhn, Daniela; Rosa, Douglas Schulz Bergman da; Wieth, Albertina Radtke; Grolli, Paulo Roberto. |
| The use of raw rice husk as substrate allows the use of crop systems that promote the recirculation of leachate in long crop cycles. Mini tomatoes present relatively low demand for photoassimilates. Thus, partial defoliation of the sympodium could benefit the crop without damage to the production or quality of the fruits. The objective of this work was to evaluate the plant growth, fruit yield and fruit quality of Cherry Hybrid Wanda and Grape Hybrid Dolcetto mini tomatoes cultivated in two recirculation crop systems (pots and troughs), using raw rice husk as substrate, under three defoliation conditions (without defoliation, removal of one and two leaves of the sympodium). The Cherry cultivar showed higher plant growth, fruit yield and mean fruit size.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Agrárias; Agronomia; Fitotecnia cherry; Grape; Growth; Solanum lycopersicum; Rice husk; Substrate. Olericultura. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34992 |
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| Perin, Lais; Peil, Roberta Marins Nogueira; Höhn, Daniela; Rosa, Douglas Schulz Bergman da; Wieth, Albertina Radtke; Grolli, Paulo Roberto. |
| The use of raw rice husk as substrate allows the use of crop systems that promote the recirculation of leachate in long crop cycles. Mini tomatoes present relatively low demand for photoassimilates. Thus, partial defoliation of the sympodium could benefit the crop without damage to the production or quality of the fruits. The objective of this work was to evaluate the plant growth, fruit yield and fruit quality of Cherry Hybrid Wanda and Grape Hybrid Dolcetto mini tomatoes cultivated in two recirculation crop systems (pots and troughs), using raw rice husk as substrate, under three defoliation conditions (without defoliation, removal of one and two leaves of the sympodium). The Cherry cultivar showed higher plant growth, fruit yield and mean fruit size.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cherry; Grape; Growth; Solanum lycopersicum; Rice husk; Substrate.; Olericultura. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34992 |
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| Adekola, Kehinde Adedeji. |
| Termite hills are described as the structure built by termite using soil in the surrounding or within the earth. The mound has extremely hard walls constructed from bits of soil cemented with saliva and baked by the sun. This research is to determine the compressive strength of termite hill soil stabilized with rice husk. The study investigated the compressive strength of 150 mm x 150 mm x 150 mm cubes made from termite hill soil and rice husk in the different mix ratio of 50:50, 60:40, 70:30, 80:20, 100:0 and was cured for 28 d with crushing the cubes at 7 d interval. The weight, bulk density and dry density of the cubes at different THS/RH mix ratio ages were determined. Test results showed that the compressive strength of the cubes increases with age... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Termite hill soil; Clay; Rice husk; Compressive strength; Cubes; Structure; Farm; Nigeria. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3398 |
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| Flores, Edgar Dulay. |
| Biomass furnace ash (BFA) generated from drying of grains in mechanical dryers were blended with cement in varying ratio of 1:4, 1:5, 1:6, 1:7 and 1:8 by volume. Each composition was cured in an ambient condition for 7, 14 and 28 days and determined their properties such as density, porosity, compressive strength and thermal shock resistance. Cold crushing strength increased with increasing cement content and curing time. Likewise, density increased with increasing cement content and curing time while porosity showed the other way. All the sample compositions exceeded 30 cycles without any crack when subjected to thermal shock resistant cycles of heating and cooling using a firing temperature of 1000oC in an electric muffle furnace. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Rice husk; Ash; Furnace; Mechanical dryer. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3944 |
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| Costa,Alexandre Kunkel da; Farret,Felix Alberto; Trennepohl,Felipe Alex. |
| ABSTRACT This paper presents a multi-criteria methodology to support decision making for management and selection of distributed mini generation sources (GD) using rice husk. Considering the potential of residual biomass, the developed model is based on the Analytic Hierarchy Process (AHP) method to evaluate the main technological arrangements of generation against the technical, economical, social-environmental aspects. Considering the possibility of energy transformation of rice husk, the following alternatives for distributed mini generation are considered: steam turbine, gas turbine, micro turbine, fuel cells, alternative combustion engine and Stirling engine. Regarding the evaluation aspects, it is defined energy efficiency, environmental impacts,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Rice husk; Distributed mini generation; Multi-criteria selection; AHP. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000200201 |
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| Registros recuperados: 10 | |
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