David Joaquin Delgado-Hernandez

David Joaquin Delgado-Hernandez
Autonomous University of Mexico State · Faculty of Engineering

About

55
Publications
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483
Citations

Publications

Publications (55)
Article
When an earthquake damages a building, the type and increment on safety level of the retrofit may not be very clear. If that increment is not too large, the next earthquake may produce even more damages to the building; also, the building importance and the seismic hazard levels play a role on that decision. The criterion of minimizing the expected...
Chapter
The high abundance, persistence and ubiquity of microplastics in the environment are causing adverse effects on a global scale. For example, their size favours the ingestion and mortality of both primary consumers at the bottom of the food chain and certain detritivores that reactivate the nutrient cycle. This problem is compounded by the fact that...
Chapter
With the 2015 Paris Agreement aiming to limit climate change to below 1.5 °C, SBTi’s Net Zero Standard presents companies with the following challenges. In the short term, they will need to act quickly and deeply to halve their greenhouse gas (GHG) emissions by around 2030. In the longer term, they will need to reduce these emissions to a residual...
Chapter
The global demand for polycarbonate reached around 4.5 million metric tons (Mt) by the end of 2016 (Greenfield 2018; IHS Chemical 2012). The polycarbonate market is expected to register a compound annual growth rate (CAGR) of 5.5% from 2018 to 2023 (Mordor Intelligence 2018). To date, polycarbonate is extensively used in electrical and electronic d...
Chapter
This review is divided into three sections. The first one corresponds to the actual researchers on recycling electronic waste polymers as fillers and reinforcers for construction materials. In the second section, the relevance of using gamma radiation as a technology that improves the mechanical performance of polymers and composites is discussed,...
Chapter
Global demand for PC reached 4.6 million tons (MT) in 2019, 4.5 MT in 2020, and 4.3 MT in 2021 (Mordor Intelligence 2023). The global demand for PC is growing at a CAGR (compound annual growth rate) of 5.7% from 2022 to 2030 (Spherical Insights 2023). In March 2022, Covestro AG started two polycarbonate compounding production lines in India, partic...
Chapter
Polycarbonate (PC) is a plastic commonly produced with bisphenol A (BPA) and phosgene (Allard 2014), and is one of the most used engineering thermoplastics. The electrical and electronics sector dominates the global PC scene, with a world market share of 46% in 2017 (IHS Markit 2018)
Article
Full-text available
Context: Nowadays, nanomaterials constitute an innovative alternative for the construction sector. This study evaluates the benefits of adding nanosilica and fly ash to Portland cement concrete in terms of its mechanical strength properties. Method: 45 specimens were used to compare the compressive strength and durability of concrete mixtures with...
Article
Reliability analysis is usually required as input for feasibility assessments of rainwater harvesting (RWH) systems. This study introduces the concept of elasticity between the volumetric reliability and a cost function to optimize the storage capacity. The elasticity was estimated for three tanks at a campus of the Universidad de Santander, Colomb...
Article
Purpose The use of improvement tools in the construction sector has shown to be an important determinant of quality. Companies endeavoring to enhance their daily practices require assistance, evidence, standards, frameworks and quantitative models from existing experts to help them set out for the road. This paper is aimed to assist construction ma...
Article
Full-text available
El uso de la Realidad Virtual tiene sus raíces en las ciencias de la comunicación visual por lo que su aplicación en proyectos arquitectónicos la distinguen de muchas otras herramientas. En este artículo se determinan las dimensiones de la metodología BIM (Building Information Modeling) que permiten implementar la VR mostrando sus posibles benefici...
Article
Full-text available
El uso de la Realidad Virtual tiene sus raíces en las ciencias de la comunicación visual por lo que su aplicación en proyectos arquitectónicos la distinguen de muchas otras herramientas. En este artículo se determinan las dimensiones de la metodología BIM (Building Information Modeling) que permiten implementar la VR mostrando sus posibles benefici...
Article
Weigh-in-motion (WIM) systems help to collect data such as vehicular loads, individual axle loads, vehicle type, and number of axles. This is relevant in engineering because traffic load performs an essential function in the design of new bridges and in the reliability assessment of existing ones, in traffic analysis and other areas of engineering....
Article
Los mapas, planos, arte gráfico, arte plumario y en general toda obra histórica, requieren de cuidados especiales. Altos índices de temperatura y humedad, así como la presencia de gases oxidantes, polvo, vibración, golpes, radiación UV, además del desarrollo de hongos e insectos, entre otros, favorecen el proceso de degradación al producir daño a s...
Article
Full-text available
Purpose The purpose of this paper is to summarize the main methods and themes used on organizational learning (OL) and learning organization (LO) research in Latin American and the Caribbean. Design/methodology/approach A literature review was conducted by means of a broad and systematic strategy to locating, selecting and analyzing papers on OL/L...
Article
Attending the environmental problems caused by polycarbonate, generated by electronic waste, in this work physical and chemical characterization of gamma-irradiated particles of recycled polycarbonate from electronic waste was made by: X-ray diffraction, energy dispersive spectroscopy (EDS), scanning electron microscope (SEM) and digital photograph...
Article
In the bridge industry, current traffic trends have increased the likelihood of having the simultaneous presence of both extreme live loads and earthquake events. To date, their concurrent interaction has scarcely been systematically studied. Prevailing studies have investigated the isolated existence of either live loads or seismic actions. In an...
Conference Paper
Full-text available
Given the frequent discrepancies between the actual and nominal concrete strength on R/C buildings, the paper proposes a procedure to calculate bonus and penalty factors to compensate losses according to the expected losses due to the ocurrence of earthquakes on the specific location for the specific building. The formulation is illustrated for bui...
Article
Full-text available
Background: A quantitative model was developed and applied for analyzing the correlation between hydrogen-induced corrosion cracking in both main cable wires and degraded stiffening of the girders of a cable suspension bridge, considering maintenance effects across time and space. Method: Bayesian inference is applied for predicting the correlation...
Article
Full-text available
The design of reinforced concrete structures strongly depends on the value of the compression concrete strength used for the structural components. Given the uncertainties involved on the materials quality provided by concrete manufacturers, in the construction stage, these components may be either over or under-reinforced respect to the nominal co...
Article
A flood occurs when water and other materials such as woody debris overflow dry areas. If there is infrastructure present, woody fragments could be transported downstream and eventually trapped, leading to increments in the hydrodynamic forces over, say, a bridge. Moreover, local scour can be developed in the structure piers. The purpose of this re...
Article
Background: The proposed research work aims not only to advance the understanding on the effect of Environmentally Assisted Cracking (EAC) on the fracture resistance of the material, but pre-venting catastrophic failure due to EAC as well. Methods: The deterministic approach focuses on the understanding of the mechanics and mechanisms of the fractu...
Article
Full-text available
A flood occurs when water and other materials such as woody debris overflow dry areas. If there is infrastructure present, woody fragments could be transported downstream and eventually trapped, leading to increments in the hydrodynamic forces over, say, a bridge. Moreover, local scour can be developed in the structure piers. The purpose of this re...
Article
Full-text available
The utilization of management tools by the construction industries in developed countries has demonstrated to be a relevant aspect of continuous improvement activities. To establish whether the same is true in developing nations, a survey was conducted in Mexico for evaluating both the level of use and perceived importance of such tools. The influe...
Chapter
Full-text available
This contribution relates two sets of knowledge in order to suggest a sustainability index for construction materials. The first one is concerned with the measurement of construction material lifecycle, related with parameters such as global warming, carcinogenic index, air pollutants, eutrophication, ecotoxicity, smog, natural resource depletion,...
Article
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Dams' safety is highly important for authorities around the world. The impacts of a dam failure can be enormous. Models for investigating dam safety are required for helping decision-makers to mitigate the possible adverse consequences of flooding. A model for earth dam safety must specify clearly possible contributing factors, failure modes and po...
Article
Full-text available
Currently, the construction sector faces great challenges, as the recent economic contraction has directly impacted this industry, and only companies that can offer quality products and services will survive in today's highly competitive markets. In particular, the housing sector has to find ways to meet the needs of its customers due to the number...
Article
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Water is a valuable natural resource for life*but the poor management is making it scarce. This lack of care has created a series of social and technical problems*including the difficulties to distribute it to individual homes*particularly in Mexico. In order to solve such problems*it is necessary to find alternatives for its harvesting* care*distr...
Article
Full-text available
RESUMEN Los materiales pétreos se emplean actualmente en casi todos los procesos edificatorios y debido a esto se les realizan diferentes pruebas, pudiendo ser tanto físicas como mecánicas; en éstas, el ensayo de carga puntual normado por ASTM D 5731, describe el empleo del equipo Point Load para determinar la resistencia mecánica en rocas no labr...
Data
Corrosion initiation time updating by epistemic uncertainty as an alternative to schedule the first inspection time of pre-stressed concrete vehicular bridge beams As traffic demands grow constantly and some vehicle bridges deteriorate because of corrosion issues, bridge agencies require non-expensive procedures to support decisions about cost-effe...
Article
Full-text available
Corrosion initiation time updating by epistemic uncertainty as an alternative to schedule the first inspection time of pre-stressed concrete vehicular bridge beams As traffic demands grow constantly and some vehicle bridges deteriorate because of corrosion issues, bridge agencies require non-expensive procedures to support decisions about cost-effe...
Article
Full-text available
Dams are civil engineering structures to hinder water flows. Criteria such as purpose, size and construction material are useful to categorise them. The latter is used to classify ‘earth dams’, which tend to have higher risk levels than other types. The failure of a dam leads to significant economic loss and usually to catastrophic impacts. In an e...
Article
Full-text available
In Mexico, there are bridges where the corrosion attack plays an important role on the bridge capacity and, therefore, its structural reliability. In this paper the time variation of the Cornell's reliability index for a simply supported beam of a vehicles bridge is presented. This is made through the behavior analysis on the changes in the crackin...
Article
Full-text available
One of the responsibilities of a Civil Engineer is to make decisions regarding preservation of infrastructure; therefore, there have been established concepts such as risk and risk analysis. Risk analysis, is a methodology applied to determine and evaluate the risk magnitude. From the structural engineering point of view, it is required that any st...
Article
Full-text available
In Mexico, since the early stages of the civilization, the stone masonry has assumed an important role in construction due to the wide availability of this kind of material. Masonry is a material composed by bricks, carved or even rubble stones jointed without (dry joint) or with mortar (mortar joints); which is principally formed with sand, water...
Conference Paper
Full-text available
High fineness is one of the most important characteristics of the Ultrafine Cements (UFC) with maximum particle size below 20 μm. Usually, UFC is obtained once the Ordinary Portland Cement (OPC) is grinded in common grinding devices e.g. drum mills; however this is a time consuming process, as it becomes complicated to reduce such a size once the p...
Article
A new framework for building quality into construction projects has been developed by the authors. In order to determine its suitability within the industry and also to gauge the extent to which it was felt to be simple, easy to understand, systematic, well structured, comprehensive, practical and applicable (the required attributes of a framework)...
Conference Paper
Full-text available
Organizations attempting to embark on the knowledge management (KM) journey need information, inputs, examples and role models from existing adopters or practitioners to help them adopt it. Hence, it is strongly believed that the growing research and literature in the KM domain should be more focused on its practical perspective. This paper represe...
Article
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The UK construction sector has been challenged to adopt manufacturing concepts to improve its performance. Total Quality Management (TQM) has been suggested as one approach that could bring about benefits to the industry. However, to date, the associated literature offers little specific information relating to current practices in the UK. To deter...
Article
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En la actualidad, las empresas que quieren crecer tienen que desarrollar nuevos y mejores productos o servicios. Una forma de lograrlo es a través de la gestión tecnológica. En México existe un premio nacional que se otorga a las compañías que cuentan con sistemas eficientes de gestión que las hacen ser más competitivas. Dicho galardón lo han ganad...
Article
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Quality function deployment (QFD) is a system for translating customer requirements (government regulations, operating conditions and buyer expectations) into suitable technical characteristics and ensuring that important ones are prioritized in the design. The method has been successfully applied in the manufacturing sector; however, its benefits...
Article
The application of improvement methods in the manufacturing industry has proven to be a valuable feature of continuous improvement activities. To establish whether the same is true in the construction sector, a survey was conducted to assess the current level of use and the perceived importance of such methods in both the U.K. and in Mexico. Follow...
Article
Full-text available
The practical application of the theoretical methods for New Product Development (NPD) and for gathering the voice of the customer has not been widely reported in the literature. This paper reviews previous studies on NPD and presents the results of empirical studies that were conducted in four UK companies in 2001. The literature search focused sp...
Article
Full-text available
The use of improvement tools in manufacturing industry has proven to be an important aspect of continuous improvement activities. To determine whether the same is true in the UK construction industry, a survey was conducted to assess the current level of use and perceived importance of such tools. In addition, the impact of the ISO 9001 quality sys...
Article
Full-text available
In this paper, the acceptable failure probability for important bridges is calculated throughout the expected cost of failure consequences. Also, the bridge expected life-cycle cost is formulated in terms of the bridge seismic hazard and the potential consequences of failure. These consequences include from the physical loss of the bridge to the hu...
Article
Full-text available
RESUMEN Algunas de las más importantes características de los llamados Cementos Ultrafinos (CUFs), es el alto valor de su finura y una distribución de tamaño de partícula por debajo de los 20 µm. Los CUFs generalmente se obtienen por medio de molienda del Cemento Portland Ordinario (CPO) en dispositivos comunes de molienda como por ejemplo molinos...

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