Abstract
In the last few decades, Portland/residue composites have been researched due to their technological and environmental advantages. In this study, residues of Acrocomia aculeata (Jacq.) Lodd endocarp (AE) were introduced in the Portland cement–soil (PC) matrix in different concentrations (0, 5, 10, 15, 20, and 50 wt%) to produce PC/AE bricks. The characterization of the microstructures of the bricks indicate agglomerates of AE particles with increased humidity in small regions distributed throughout the matrix. Mid-infrared and laser-induced breakdown spectroscopy, along with thermogravimetry, indicated that AE contained mainly lignin and cellulose, as well as inorganic chemical elements such as Mg and Si. X-ray studies revealed that AE did not affect the crystallographic properties of the Portland/AE bricks. The findings indicate that the use of AE improved the thermal insulation capability of the composites with a small impact on the compressive strength.
Highlights
Studies have been conducted involving the introduction of different residues in concrete and soil–cement bricks to produce composites with improved mechanical and physical properties [1,2,3] and manage residue from the environment [4]
The composite with 5 wt% aculeata endocarp (AE) presented a thermal conductivity 25% lower than one verified in the Portland cement–soil (PC) material, but the higher reduction (37%) was confirmed for the composite with 15 wt%
Composites made of Portland cement-soil and Acrocomia aculeata endocarp were produced, and Composites made of Portland cement-soil and Acrocomia aculeata endocarp were produced, and their mechanical and thermal properties were analyzed
Summary
Studies have been conducted involving the introduction of different residues in concrete and soil–cement bricks to produce composites with improved mechanical and physical properties [1,2,3] and manage residue from the environment [4]. Soil–cement brick is a component of masonry made of a homogeneous, compacted, and hardened mixture of soil, Portland cement, and water [5]. The insertion of materials composed of cellulose and lignin in Portland cement composite (PC) matrices is common. The addition to these materials, the cementitious matrix has high commercial importance, as they act as a filler and reduce the amount of cement needed in the matrix. The application of sugarcane bagasse influenced the hydration reactions of the cement, behaving like a non-plastic material with moderate pozzolanic activity, and their particles contributed to improving the packaging characteristics of soil-cement mixtures [6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
