Corn cob lightweight concrete for non-structural applications

Pinto, José M.; Vieira, Barbosa; Pereira, H.; Jacinto, C.; Vilela, P.; Paiva, Anabela; Pereira, Sandra; Cunha, Vítor M. C. F.; Varum, Humberto

doi:10.1016/j.conbuildmat.2012.02.043

Cited by 84 publications

(43 citation statements)

References 9 publications

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“…At the same time, granulate of corn cob has also been suggested as a possible organic lightweight aggregate of concrete for non-structural applications, and as an alternative solution to currently applied solutions such as expanded clay, particles of expanded polystyrene (EPS), particles of cork or other lignocelluloses wastes (10). High level of water absorption of the granulate of corn cob, slow drying process and low compressive strength of the lightweight concrete produced were the main identified material limitations in (10). Taking into account the relevance of this type of building element, several research works (11)(12)(13)(14) have proposed alternative lightweight aggregates (i.e.…”

Section: Introductionmentioning

confidence: 99%

Lightweight concrete masonry units based on processed granulate of corn cob as aggregate

Faustino¹,

Silva²,

Pinto³

et al. 2015

Mater. construcc.

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A research work was performed in order to assess the potential application of processed granulate of corn cob (PCC) as an alternative lightweight aggregate for the manufacturing process of lightweight concrete masonry units (CMU). Therefore, CMU-PCC were prepared in a factory using a typical lightweight concrete mixture for non-structural purposes. Additionally, lightweight concrete masonry units based on a currently applied lightweight aggregate such as expanded clay (CMU-EC) were also manufactured. An experimental work allowed achieving a set of results that suggest that the proposed building product presents interesting material properties within the masonry wall context. Therefore, this unit is promising for both interior and exterior applications. This conclusion is even more relevant considering that corn cob is an agricultural waste product. RESUMEN: Unidades de mampostería de hormigón ligero basado en granulado procesado de la mazorca de maíz como árido.En este trabajo de investigación se evaluó la posible aplicación de granulado procesado de la mazorca de maiz como un árido ligero alternativo en el proceso de fabricación de unidades de mampostería de hormigón ligero. Con esta finalidad, se prepararon en una fábrica diversas unidades de mampostería no estructural con granulado procesado de la mazorca de maiz. Además, se fabricaran unidades de mampostería estándar de peso ligero basado en agregados de arcilla expandida. Este trabajo experimental permitió lograr un conjunto de resultados que sugieren que el producto de construcción propuesto presenta interesantes propiedades materiales en el contexto de la pared de mampostería. Por lo tanto, esta solución es prometedora tanto para aplicaciones interiores y exteriores. Esta conclusión es aún más relevante teniendo en cuenta que la mazorca de maíz es un producto de desecho agrícola.

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Section: Introductionmentioning

confidence: 99%

Lightweight concrete masonry units based on processed granulate of corn cob as aggregate

Faustino¹,

Silva²,

Pinto³

et al. 2015

Mater. construcc.

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show abstract

“…A lightweight concrete for nonstructural purposes based on granulated corncob was studied and proposed [21] (case study II). A weight ratio of 6:1:1 [i.e.…”

Section: Case Study II -Lightweight Concrete For Nonstructural Purposmentioning

confidence: 99%

“…details I and II; Figure 14) to estimate the thermal transmission coefficient (U). Based on these experimental results and applying Expression (1), the U value of the lightweight concrete for nonstructural purposes based on corncob aggregate was possible to quantify and the respective value was 1.99 W/m 2°C [21].…”

Section: Case Study II -Lightweight Concrete For Nonstructural Purposmentioning

confidence: 99%

Possible Applications of Corncob as a Raw Insulation Material

Pinto¹,

Briga-Sá²,

Pereira³

et al. 2016

Insulation Materials in Context of Sustainability

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Some alternative applications of corncob as a raw thermal insulation material are presented in this research work. Usually, corncob has been treated as an agricultural waste. Finding practical applications of this waste in product manufacturing may preserve the environment and may also allow using more green technologies. Therefore, a corncob particleboard, a lightweight concrete for nonstructural purposes, and a lightweight concrete masonry unit (CMU) are the granulated corncob-based products proposed. These products are studied in terms of thermal performance, and some thermal parameters are delivered. The results obtained through the experimental study allowed to estimate the thermal conductivity of the granulated corncob and of the granulated corncob particleboards. The values obtained were 0.058 and 0.101 W/m°C, respectively. A thermal transmission coefficient of 1.99 W/m 2°C was obtained for the nonstructural corncob lightweight concrete, and it was concluded that the density and the thermal properties of this alternative solution are in accordance with the properties of the currently used expanded clay concrete. For the granulated corncob lightweight CMU, a value of 1.15 W/ m 2°C was estimated. This shows that this agricultural waste may have potential as a thermal insulation product.

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“…Shelter is one of the basic needs of human being. United Nations Center for Human Settlements estimates indicated that, more than half of the urban populations in developing countries live in life and health threatening conditions [1]. Unless dramatic and determined efforts are made on the housing front, trends and estimates point out that the situation is likely to become even worse.…”

Section: Introductionmentioning

confidence: 99%

“…Study conducted by M. Nisnevich et al [8] shows, using coal ash as replacement of cement makes concrete lightweight. Other materials like incenerator bottom ash [7], Sludge ash [9], Corn Cob ash [1] and the like are possible pozolanic materials that can be used for production of lightweight concrete.…”

Section: Introductionmentioning

confidence: 99%

Production of Lightweight Concrete Using Corncob Ash as Replacement of Cement in Concrete

Assefa¹

2019

AJCE

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One of the biggest issues, all over the world is getting affordable house to the community. In developing countries, where it is difficult for most people to satisfy basic needs, construction of modern house is a big challenge. Different ways were tried by researchers and scholars to find alternative construction materials. One of this is replacing the costly construction material of cement with locally available material, especially with those considered as waste. Corncob is an agricultural waste, which is considered as one of binding materials. Very few researchers tried to use corncob ash as a means of producing lightweight concrete. So, this research was aimed to check whether corncob ash is used to produce lightweight concrete by replacing cement as a binding material or not. In order to reach on conclusion, corncob was collected from agricultural farmers and burned in furnace at a temperature of 850°C. The burned ash powder was sieved in order to remove coarser material and replacement of cement was done by 5%, 10%, 15%, 20%, 25%, 30%, and 35% with corncob ash. For each replacement, including control, 3 samples were prepared based on ASTM standards. After curing for 7 and 28 days in curing tank, the weight and compressive strength of samples were checked. Based on the experimental result, as the percentage of corncob ash increase, the weight of cubes decreased and 15% and above corn cob ash replacement makes concrete cubes lightweight. The compressive strength was also decreasing as the amount of replacement increase. However, up to 15% replacement, compressive strength is found within the range of concrete grade requirement.

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Corn cob lightweight concrete for non-structural applications

Cited by 84 publications

References 9 publications

Lightweight concrete masonry units based on processed granulate of corn cob as aggregate

Lightweight concrete masonry units based on processed granulate of corn cob as aggregate

Possible Applications of Corncob as a Raw Insulation Material

Production of Lightweight Concrete Using Corncob Ash as Replacement of Cement in Concrete

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