Este estudo visa analisar a composição gravimétrica, avaliar parâmetros químicos e classificar os Resíduos de Construção Civil (RCC) da cidade de Fortaleza de acordo com a Resolução CONAMA nº 307 e com a NBR 10004. Os resultados indicam que o RCC de Fortaleza é composto por 93,40% do Grupo A, 6,40% do Grupo B, 0,02% do Grupo C e 0,20% Grupo D. O primeiro é composto principalmente por areia e solo (24,65%) e argamassa (22,00%), que são materiais com alto potencial de reutilização ou reciclagem. Além disso, de acordo com a análise química, o RCC de Fortaleza mostrou alta variabilidade em todos os parâmetros. Cr, Pb e SO4²-, por exemplo, apresentaram valores acima dos limites especificados pela NBR 10004, indicando que esse material deve ser classificado como Classe II-A (não perigoso e não inerte).

As corrosion has slow development, its detection at an early age could be an alternative for reducing costs of structural rehabilitation. Therefore, the employment of structural health monitoring (SHM) systems, sensing configurations collecting data over time allowing for observing changes in the properties of the materials and damage emergence, for monitoring corrosion can be a good strategy to measure the damage and to decide the better moment for intervention. Nonetheless, the current corrosion sensor technology and the high costs of the sensing system implementation are limiting this application in the field. In this work, an optical fiber Bragg grating (FBG)-based sensing system is proposed for monitoring the thickness loss of a 1020 carbon steel metal plate subjected to controlled corrosion. The natural frequency of the plate was collected as a function of the corrosion time over 3744 h. To validate the experimental results, ultrasound measures and electrochemical tests were also carried out under similar conditions. The experimental results show adequate reliability, indicating the suitable functionality of the proposed system for monitoring the thickness loss caused by corrosion in metallic structures, in comparison with traditional methods, as ultrasonic and electrochemical measures.

This paper aims to review the performance analysis of interlocking concrete block pavement with by-products such as coconut fibers, and construction and demolition recycled materials, and to compare their skills with asphalt pavement, especially for light-traffic urban road applications. The focus is on mechanical behavior (mix parameters and the influence of by-products), pavement design, sustainability (the heat island effect), the management of contaminant concentrations within infiltration related to permeability, and Life Cycle Assessment. Considering the overall performance analysis, interlocking concrete block pavement was the most attractive alternative because it was approximately 33–44% cheaper in the maintenance process, cooler over a range of 2.2–15 °C, and more permeable by 0.4 cm/s to 0.6 cm/s than asphalt pavement, saving costs and improving drainage and human thermal comfort. However, asphalt pavement was around 35% cheaper during the construction phase (mainly due to energy consumption), and it presented a 32% lower nitrogen oxide concentration. This paper showed the advantages and disadvantages of both types of pavements. A further breakdown should be developed and integrated into the decision-making process about choosing between solutions.