Conference Agenda

This study evaluates the feasibility of bricks with recycled rubber for use in load-bearing walls of confined masonry in Arequipa, Peru. Proportions of 3%, 8%, and 13% rubber powder and 5%, 15%, and 25% rubber granules were incorporated into a clay mixture. The bricks were manufactured following current regulations and subjected to tests for dimensional variation, warping, water absorption, and compressive strength, in accordance with NTP 339.613 and NTP 339.604 standards. The results indicate that recycled rubber increases porosity, enhancing thermal and acoustic insulation but reducing compressive strength. Only bricks with 3% rubber powder and 5% granules met the minimum requirement of 130 kg/cm². All bricks complied with the regulatory limits for dimensional variation, warping, and water absorption (≤ 22%). It is concluded that bricks with low proportions of recycled rubber offer adequate structural performance and promote sustainability by reusing discarded tires. However, higher rubber content compromises structural capacity. The economic analysis supports their feasibility as a promising alternative for more sustainable construction.

The report presented is a research project whose main purpose is to develop a rigid pavement using titanium nanoparticles in order to increase the compressive strength of concrete in the Av. José Saco Rojas, located in the district of Carabayllo, Peru. It seeks to solve the premature wear of pavements caused by the increase in vehicular flow and the low resistance of concrete to compression. The main objective is to determine how the use of titanium nanoparticles improves the strength of concrete. Experimental tests were carried out with concrete molds containing various proportions of titanium nanoparticles (0%, 3%, 5%, 7%, y 12%). Mechanical attributes such as compressive strength and physical properties of aggregates were analyzed. Nanoscopic titanium particles increase mechanical strength and enhance features such as floor impermeability. A dosage of 7% is considered to be ideal for rigid pavement projects. This design is feasible to reduce costs and extend the useful life of the pavement. The project highlights the importance of nanomaterials in civil engineering as an option to improve road infrastructure, adjusting to the demands of transport and urban development in Carabayllo.

The purpose of this research is to optimize the mechanical properties of concrete for sidewalks by partially replacing cement with recycled granular rubber (CGR) in proportions of 1%, 3%, and 5%, following ASTM and NTP standards. Workability (Slump) and compressive strength tests were conducted on specimens measuring 0.10 m in diameter and 0.20 m in height, which were evaluated at 7, 14, and 28 days under water curing. The results revealed that CGR decreases the workability of concrete but remains within the permissible limits established by the standards. Additionally, it enhances compressive strength at 1% and 3% replacement levels, while at 5%, the strength was lower than that of the control concrete. Furthermore, the use of CGR led to a moderate cost reduction, offering an economically and environmentally sustainable solution for urban applications.

Civil engineers are responsible for the design, management, projection, and construction in the fields of geotechnics and roadways. The CE.010 Pavement Standards, section 6.4, outlines the foundations for justifying the need for pavement rehabilitation, specifying the application of inspections to determine the road's condition and execute the necessary rehabilitation.

Highways are critical for Peru's development, facilitating access, communication, and economic growth for society. However, the high costs and poor quality of inspections caused by outdated methodologies in the current standards, which have remained unchanged for 14 years despite scientific and technological advancements, are concerning. Therefore, it is proposed to improve the efficiency of pavement condition inspections by implementing a remotely piloted aircraft system (RPAS) and subsequently updating the standards with a detailed methodology that incorporates the roughness index.

The RPAS allows for the identification of the International Roughness Index (IRI) in pavements with greater efficiency, offering advantages over the Merlin device. This facilitates better management and productivity in evaluation tasks. The proposed objectives include determining how the implementation of RPAS influences efficiency, as well as its impact on performance, data collection, and operation in generating efficiency for inspecting the pavement condition of the Panamericana Sur at Km 16.3 in Villa El Salvador, in 2024.

Keywords: Efficiency 1, Management 2, Remotely Piloted Aircraft 3, IRI 4.

Concrete durability in coastal environments is a critical concern for civil engineering, especially in a country like Peru, where the coastline extends over 2,400 kilometers and presents specific challenges due to climatic and geographic characteristics. This research focuses on the behavior of concrete when mixtures with type I and type V cement are used, evaluating their performance under severe exposure conditions and different curing methods that affect the structures and proposing solutions based on laboratory tests. For the sample considered, several standard tests were performed, such as settlement (12), unit weight (12), capillary suction (16), porosity (16) and compressive strength (180) in compliance with ASTM standards; as well as special tests such as sulfate resistance (48) and air permeability - Torrent (16) based on the Swiss SIA standard. The results indicate that mixes with type V cement, designed to resist the action of sulfates, show superior performance in terms of durability compared to mixes using type I cement, especially under dry curing. However, the tests also reveal that standard curing offers significant additional protection, improving resistance to sulfate ingress and the formation of chemical attack products within the concrete matrix. Finally, this research contributes to the achievement of Sustainable Development Goal (SDG) 9, as improving the properties of concrete and increasing its resistance to aggressive agents such as seawater and sulfates will lead to a better use of resources, contributing to the reduction of operating costs and a more efficient use of materials.

The general objective of the research is to analyse the influence of using 10%, 15% and 20% recycled concrete (RCA) as a substitute for coarse aggregate on the compressive strength and permeability of a permeable pavement in urban projects in Cajamarca. This study was carried out due to the need to find sustainable and efficient alternatives that improve the properties of concrete, thus allowing the construction of more resistant pavements with adequate infiltration capacity, adapted to the current demands of sustainability and stormwater management. To achieve this objective, an experimental study was designed in which detailed laboratory tests were carried out on the aggregates, as well as the preparation of cylindrical specimens with different proportions of recycled concrete: 10%, 15% and 20%. These specimens, together with control (standard) samples, were subjected to compressive strength and permeability tests at 7, 14 and 28 days of curing. Statistical analysis of the data was performed using ANOVA tests, at a 5% significance level, to determine whether variations in the proportion of RCA significantly impacted the mechanical and permeability properties of the concrete.