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Abstract
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.
Highlights
Finding alternative environmentally friendly building solutions has been a goal of the technical and scientific communities
Lightweight concrete masonry units based on processed granulate of corn cob as aggregate and water (W) are the constituents considered in this research for the manufacturing of lightweight concrete masonry units
Mass, bulk density, fire resistance, sound and thermal insulation behaviours, compressive strength, water penetration and absorption, linear drying shrinkage, aging sensitivity, are some material properties were assessed in order to characterize technically a concrete masonry units (CMU)
Summary
Finding alternative environmentally friendly building solutions has been a goal of the technical and scientific communities. 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. volcanic slag, reservoir sediments, among other possibilities) and cement replacement materials (i.e. wood fibre waste, rice husk ash, limestone powder waste, among other possibilities) for the manufacturing of concrete masonry units. Based on these assumptions, this research work intends to assess the potential of applying processed granulate of corn cob as an alternative solution to lightweight aggregate for the manufacturing of concrete masonry units. Covering the particles of corn cob with cement paste was the technique proposed to solve the above stated material limitations
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