Juan M. Manso

• PhD Civil Engineer
• Head of Department at University of Burgos

The glass fiber-reinforced polymer (GFRP) materials of wind turbine blades can be recovered and recycled by crushing, thereby solving one of the most perplexing problems facing the wind energy sector. This process yields selectively crushed wind turbine blade (SCWTB), a novel waste that is almost exclusively composed of GFRP composite fibers that c...

The production of raw-crushed wind-turbine blade (RCWTB) and its addition to conventionally designed self-compacting Concrete (SCC) enable us to provide a second life to wind-turbine blades. However, SCC containing RCWTB must show proper fresh behavior, an aspect evaluated in this paper both experimentally and through simulations based on computati...

It is generally acknowledged that it is an urgent task of the concrete industry to find new ways of introducing waste materials in their mixtures in order to increase its sustainability. Wind power industry can play an important role in this new challenge as a solution for the recycling of the old wind turbine structures that are reaching the end o...

El desmantelamiento de los parques eólicos en las próximas décadas pone de manifiesto la necesidad de establecer procesos de reciclaje que den salida al material que compone los aerogeneradores. El corte y triturado no selectivo de sus palas da como resultado la obtención de un tipo de residuo denominado Triturado de Pala de Aerogenerador (TPA). Su...

A research experience on the construction of a pilot road section with a porous asphalt mixture incorporating Ladle Furnace Slag (LFS) as fine aggregate in its composition is reported. The pilot section consisted of overlaying this mixture on existing bituminous pavement and was intended to simulate a real application of this sustainable constructi...

Raw-crushed wind-turbine blade (RCWTB), a waste from the recycling of wind-turbine blades, is used as a raw material in concrete in this research. It contains not only fiberglass-composite fibers that bridge the cementitious matrix but also polyurethane and balsa-wood particles. Therefore, concrete containing RCWTB can be notably affected by moistu...

Wind energy has been making its way into renewable energies until today, experiencing a continuous growth worlwide that leads to the urgent task of reflecting on and solving the issue of the recycling of the wind turbine blades. Their complex composition causes that currently there is no a widely acepted solution for it. This study evaluates the in...

Many of the first wind-turbine installations are reaching the end of their useful life, so their blades have to be replaced. Inexpensive, sustainable, and straightforward recycling solutions are therefore needed. The conversion of turbine blades into raw materials for concrete solutions is proposed in this paper, through a novel recycling process e...

Muchos de los primeros aerogeneradores están acercándose al final de su vida útil. Así, sus palas deben ser desmanteladas, necesitando soluciones para su reciclaje innovadoras, por los materiales que la componen. Esta solución aborda su tratamiento mediante corte y machaqueo, generando así Triturado de Pala de Aerogenerador (TPA), válido para su in...

There is a need to promote high performance and sustainable construction materials such as Self-Compacting Concrete (SCC) made from various wastes. In concrete manufacturing, there is a general tendency to worsen the workability and mechanical behavior when working with wastes instead of natural raw materials. It is therefore necessary to use multi...

The use of Recycled aggregate (RA) enhances concrete sustainability. If used on an industrial‐scale, structural verification, and testing will be required to confirm that RA concrete can meet relevant industrial standards and the requirements of manufacturers, especially in the precast‐concrete industry. In this paper, an experimental campaign with...

This paper presents a pilot experience of applying a novel, high-performance and sustainable material for pavements: a Porous Asphalt (PA) mixture that incorporates Ladle Furnace Slag (LFS). The overlay of a thin surface layer of this material was applied to an existing bituminous pavement. The main investigative results included the validation of...

Recycled Aggregate (RA) usually increases porosity and weakens Interfacial Transition Zones (ITZs) of concrete, which favors the appearance of internal thermal damage. Four Self-Compacting Concrete (SCC) mixes with coarse and fine RA were subjected to positive and negative cyclic temperature variations to characterize their thermal damage and quant...

Adding sustainable raw materials to Self-Compacting Concrete (SCC) modifies its flowability behavior. Furthermore, the use of these raw materials may at the same time even improve one fresh property while worsening another. An accurate flowability description of SCC containing sustainable raw materials therefore requires a multi-parametric classifi...

Non-destructive tests that cause no damage to concrete components can be used in rehabilitation works to determine concrete mechanical properties, such as the modulus of elasticity. In this paper, models are presented to predict the modulus of elasticity of Self-Compacting Concrete (SCC) with Recycled Aggregate (RA) and slag cement through the hamm...

A surface layer of permeable bituminous mixture has been laid on an existing pavement section. This layer, in addition to providing the pavement with draining characteristics and acoustic comfort, incorporates a residue that is difficult to apply, the ladle furnace steel slag. The tests carried out show that the designed mixture meets the requireme...

Cold-formed thin-walled steel profiles are used in Storage-and-Retrieval (S&R) logistic systems due to their lightweight design, cost-effective production, and mechanical performance. Moreover, modern S&R systems are automated, where carrier-shuttles and stacker-cranes move heavy palleted products through a racking structure, subjecting its structu...

Numerous test results at laboratory scale confirm the utility of Recycled Aggregate (RA) for the development of concrete that demonstrates durability and adequate in-fresh and mechanical behavior. However, feasibility evaluations of the use of RA in real industrial applications are necessary, before any large-scale industrial application of these p...

The high fine-aggregate content of Self-Compacting Concrete (SCC) means that its deformational behavior differs from that of vibrated concrete. SCC performance is further altered when industrial by-products are used as raw materials in those fractions. In this paper, the aim is to analyze and to model the deformational behavior under compression an...

La presente revisión bibliográfica profundiza en cómo las características del Árido de Hormigón Reciclado (AHR) afectan al comportamiento resistente del Hormigón AutoCompactante (HAC) y cómo el efecto esperado del AHR puede alterarse por cambios en la composición del HAC. Se demuestra que, si la trabajabilidad del HAC se mantiene constante, la resi...

Estimating the shrinkage of structural concrete is essential to calculate, at the design stage, the stresses that a structure may experience due to this phenomenon. Nevertheless, changes in composition, as well as the use of wastes as raw materials, alter the shrinkage behaviour of concrete and render invalid shrinkage-prediction models from the st...

The environmental conditions to which a concrete may be exposed will condition its real range of use. Thus, concrete behavior must, at all times, be verified under a wide variety of environmental conditions, in order to ensure its real applicability. In this study, the real strength development and durability behavior of a fiber-reinforced self-com...

The specific physical properties of each byproduct added to a concrete mix significantly condition its in-fresh behavior. Its hardened performance, mainly a function of its compressive strength, is also affected by such aspects as porosity and interfacial transition zones (ITZs). A mix design that includes industrial residues must therefore be prop...

The purpose of this research was to study the feasibility of incorporating steel slags into coarse bituminous mixtures. The objective was twofold: to reduce dependence on natural aggregates, and to provide a use for industrial by-products. The slags studied come from the manufacture of carbon steel in electric furnaces and are divided into two type...

The high cement content of high-performance concrete (HPC) results in improved strength, but also in large shrinkage. The substitution of natural aggregates (NA) with recycled aggregates (RA) notably affects these properties in conventional concrete. This study intends to analyse the effect of the content of RA and their maturity (time elapsed betw...

Plastic strain behavior in the transversal direction to the axis of loading has often been underestimated in concrete design and its strength performance. However, as this article demonstrates, it is fundamental to define the viability of using concrete of a certain composition in real applications. In this study, 15 Self-Compacting Concrete (SCC)...

The determination of residual stress distributions in cold-formed members is revisited considering both experimental and numerical methodologies. Destructive, semi-destructive and non-destructive techniques are reviewed with special emphasis on sectioning, hole drilling and X-ray diffraction; the particularities of each procedure on cold-formed sec...

Precast companies produce high amounts of waste due to the excess of fresh concrete not used during the manufacturing of the pieces or the rejection of elements with aesthetic or geometric defects. In recent years, because of the increased environmental awareness and to get a greater sustainability in the precast factories, this waste has not been...

Both the in-fresh behavior (slump flow, viscosity, passing ability, resistance to segregation, density and air content) and the mechanical behavior at different curing ages (compressive strength, ultrasonic pulse velocity, hammer rebound test, splitting tensile strength, flexural strength, modulus of elasticity, Poisson coefficient, stress-strain c...

Featured Application The results of this research have been followed for the use of recycled concrete at the ARTEPREF precast plant (Spain). Abstract The research presented in this article analysed the influence of incorporating precast concrete waste as an alternative to coarse aggregate in self-compacting concrete to generate new precast element...

The objective of this paper was to analyze the influence of crushed precast concrete waste on the transport mechanisms as indicators of the durability of precast recycled self-compacting concrete (SCC) as an alternative to the coarse fraction of natural aggregate. The replacement percentages were 20%, 50% and 100%, by weight, of the silica gravel 2...

Formative Assessment and Cooperative Work (FACW) is a teaching methodology that promotes student learning based on peer support, both in solving problems and identifying the mistakes made through feedback. The perceptions of 49 mechanical engineering students at the University of Burgos are analyzed in this article with regard to their first practi...

The use of different types of waste in the manufacture of concrete is increasingly common, due to unabating concerns over climate change and sustainability in the construction sector. It is now widely accepted that the optimal behavior of vibrated concrete produced with the addition of certain wastes can rival the behavior of conventional products....

Electric Arc Furnace Slag (EAFS) can be efficiently reused as aggregate in the production of high-volume batches of hydraulic concrete mixes that show interesting properties in both the fresh and the hardened state. Mixtures containing EAFS aggregate in proportions of nearly 50% by volume are prepared for use as pumpable and self-compacting mixes w...

Due to an error introduced during the production process, Fig. 11 appeared incorrectly in the original publication of this article. It appears correctly here.

The experimental measurement of residual stresses by the hole-drilling method is a versatile technique due to its great simplicity. The technique consists of drilling on a material surface and measuring the relieved deformation on the surface by means of strain gauge rosettes. The most widespread method to obtain residual stresses from relieved def...

The Hole-Drilling method is a semi-destructive technique useful for obtaining residual stress distributions by drilling and measuring relieved strains. The standard for this method, i.e., ASTM E837 – 13a, is based on the Integral Method and facilitates obtaining the coefficient matrices required to solve the inverse problem and to calculate the res...

In the manufacture of carbon steel in Spain and Italy, there is a prevalent process known as “the electric cycle”, which involves melting scrap in an Electric Arc Furnace (EAF) and then refining the steel in a Ladle Furnace (LF). In this process, the main residues generated are two types of slag: the EAF Slag and the LF Slag. The excellent properti...

The use of electric arc furnace slag (EAFS) , a by-product of the steelmaking industry, as an aggregate in concrete has been demonstrated to be a good practice in its manufacture. Furthermore, the incorporation of fibers in concrete provides a more ductile behavior, increasing their tenacity and load capacity, improving the flexotraction strength a...

Electric arc furnace (EAF) slag has excellent mechanical properties that justify its use as aggregate in the manufacture of bituminous mixes. Its main properties, the problems with its application, and the important features of the mixtures made with this slag (mechanical behavior, resistance to fatigue and permanent deformation, moisture susceptib...

In this research, the possibility of making concrete reinforced with fibers and manufactured with recycled aggregates from carbon steel production was explored. Electric arc furnace slag (EAFS) was used as coarse and medium aggregate, and part of the sand sizes. Metallic and synthetic fibers were added in different amounts. Initially, the propertie...

An innovative educational experience forming part of the ‘Advanced Calculation of Structures’ module, on the Master’s Degree in Civil Engineering, at the Polytechnic School of the University of Burgos, is described, as a means of motivating students in the use of the Finite Element Method (FEM). The work was proposed for students repeating the subj...

Ladle Furnace Slag (LFS) may be used in substitution of fine aggregate (2-0.063 mm), and filler (<0.063 mm) in bituminous mixtures, considering its suitable particle size and hydraulic properties. From among the range of bituminous mixtures, this research is conducted on Porous Asphalt mixes (PA). Their high void ratio means they can absorb any eve...

Since the late-nineteenth century, the use of reinforced-concrete as a structural material has proliferated and is now commonplace in the modern built environment. Some of the structures from that century are even considered cultural heritage. In the early stages of its technical development, concrete was seen as practically immutable over time; ho...

ResumenEl colapso de un muro pantalla durante su ejecución representa un impacto a gran escala tanto en el aspecto económico como en el técnico. En este documento describimos las lesiones del muro real tanto los días antes del colapso como durante el colapso. Cuando ocurre un incidente de este tipo el objetivo principal es averiguar las causas para...

Electric arc furnace oxidizing slag (EAFS) is a by-product of the steelmaking industry, generated after the melting and the preliminary acid refining of liquid steel. It is a stony material that is easy to crush for use as aggregate in concrete mixes. This study examines the long-term aging reactions of EAFS and its volumetric stability, to gain fu...

Present-day university systems need to educate graduates who are confident and highly independent, attributes that are especially relevant to engineering. We need to develop active methods that can analyze the prior knowledge of students and that impart teaching based on self-regulation and self-assessment by the student. In this study, we work wit...

Electric-arc furnace slag is proposed as a substitute for the conventional aggregate used in classical structural concrete. In the present research is studied the durability of these slag aggregate concretes and their resistance to both physical (freeze–thaw, high temperature and relative humidity) and chemical degradation (sulfate attack, alkali–a...

Ladle furnace basic slag (LFS) is a by-product of the steelmaking industry that can be used in civil works, especially for soil stabilization. This sustainable application is based on the reactivity of certain compounds at ambient temperatures such as calcium aluminates, free calcium oxide and free magnesium oxide. These compounds show hydraulic re...

Yeso de construcción fabricado a partir de sulfato cálcico hemihidratado con diferentes sustituciones de yeso por escoria blanca de horno cuchara reciclada, obtenida como subproducto del proceso de afino de las coladas de hierro de la metalurgia primaria. La presente invención se basa en la obtención de un material con características apropiadas pa...

High-yield strength steel-plated structures represent competitive solutions when used in steel and steel–concrete composite bridges. Nevertheless, further modifications may still be introduced at the design stage in the case of slender sections, in order to minimize the number of their stiffeners and thereby economize on manufacturing costs. Euroco...

Natural clayey soils have often to be stabilized by mixing them with certain materials, such as cement, lime, or similar products, so that they acquire the necessary properties for civil works. Some industrial by-products can also be used for this purpose, among which steelmaking slags. Our research studies the properties of Ladle Furnace Slag (LFS...

After many years in forgetfulness, community has begun to realize the real importance of iron and steel constructions. The term "Architecture and Engineering of iron ", covers a lot of realizations which often are still in use. The acknowledgment of its qualities requires a baseline on the defining elements of their aesthetics, besides other aspect...

Recent EHE-08 code has introduced many changes, both conceptual and parametric, in different aspects of its requirements. This paper seeks to offer support to the concrete designer, enabling pre-test calculations of the instability limit state. Beginning with an introduction to the meaning of the lower limit of slenderness including ACI-318, EC-2 a...

The use of electric arc furnace oxidizing slag (EAFS) is discussed in this paper as a high-quality coarse aggregate for the manufacture of concrete. Ladle furnace reducing slag (LFS) is also discussed, both as a fine aggregate and a potentially hydraulic material. A single system is used for proportioning this type of concrete, in which the presenc...

Ladle furnace basic slag is a by-product of the steelmaking industry. This study examines the properties of masonry mortars made with ladle furnace basic slag and the other conventional components such as sand, cement, and admixtures. Eight different mixes were prepared and the main properties of the resulting mortars were analysed: density, streng...

Recent EHE-08 code has introduced many changes, both conceptual and parametric, in different aspects of its requirements. This paper seeks to offer support to the concrete designer, enabling pre-test calculations of the instability limit state. Beginning with an introduction to the meaning of the lower limit of slenderness (including ACI-318, EC-2...

The reuse of steelmaking slag is an important feature in improving the environmental sustainability of concrete production. In this work, the properties in the hardened state of concrete manufactured with two types of steelmaking by-products-electric-arc furnace slag (EAFS) and ladle-furnace slag (LFS)-are analyzed Particular attention is paid to i...

Ladle furnace basic slag (LFS) is a by-product of the steelmaking process. It has rarely been recovered in the past and is usually disposed of in landfill sites. Despite containing stable chemical substances of great quality, some of which are potentially hydraulic, its practical applications have been limited. This paper discusses the attractive o...

This paper deals with the study of a highly durable polyester polymer concrete reinforced with glass fibre reinforced polymer rebars. The paper describes the properties of this specific concrete, which were tested using different experimental techniques such as porosimetry, scanning electron microscopy and petrography. Likewise, characterisation in...

Electric arc furnace (EAF) slag, a by-product of steelmaking recovered after the oxidizing process, is useful when employed as aggregate in hydraulic concrete and bituminous mixtures. Concrete made with EAF oxidizing slag as an aggregate shows good physical and mechanical properties and further study of its durability will ensure greater reliabilit...

The study aims to analyze resin concrete (RC) bond behavior based on an isophthalic polyester resin, reinforced with nonmetallic rebars and is formed by pultruded glass fiber-reinforced polymer (GFRP). The material is described at micro- and macrolevel by presenting the key physical and mechanical properties using different experimental techniques...

Ladle furnace reducing slag is a common byproduct in steelmaking of carbon and low alloy steels. After air cooling and weathering over several days, this material is completely ground into fine white particles. Physical, chemical, and crystalline characterizations were performed in order to verify possibilities for its direct application as a const...

This paper describes the work carried out in laboratory to produce concrete with good properties using oxidizing electric arc furnace (EAF) slag as fine and coarse aggregate. To do this, the slag obtained in the steelmaking process must be crushed and stabilized. First, a suitable mortar must be made and tested. Next, several mixes of concrete are...

El trabajo consiste en el desarrollo de una intranet educativa del grupo de asignaturas del área de conocimiento, estableciendo una serie de privilegios de acceso en cascada para diferentes tipos de alumnos. Al mismo tiempo se desarrolló una material docente mínimo para configurar un primer contenido dela herramienta y se desarrolló un CD guía de l...

Consiste el trabajo en el desarrollo de una herramienta de cálculo de estructuras reticlads planas desarrollado en lenguaje JAVA y un entorno gráfico. Se convierte en una herramienta útil y potente para la asimilación práctica de los conocimientos teóricos impartidos

El trabajo consiste en el desarrollo de una herramienta de cálculo de estructuras reticuladas planas desarrollado en lenguaje JAVA y un entorno gráfico. Se convierte en una herramienta útil y potente para la asimilación práctica de los conocimientos teóricos impartidos