Precast Concrete Ducts: Service Life Estimation
The concrete carbonation and chloride penetration models given by the Concrete Spanish Regulation (EHE-08) are applied in this paper to the service life estimation of concrete ducts used in sanitation and drainage systems. Also, several simple rules to improve the concrete ducts performance in the more frequent service conditions are presented.
Assessment of one coat mortar: facades rendering
One mortar coat as facade fi nishes have been used widely in all Spain. The evaluation of these products can be performed using standard UNE-EN 998-1 or a DIT plus. This work shows the most significant requirements that have been taken into account in assessing the mortars for facades in accordance with a DIT plus, which show the importance/relevance of these evaluations for this type of products, highlighting: requirements exceeding pickups in the UNE-EN 998-1, Compliance with the national Regulations, System of certifiCation of conformity and Instalation work.
EQUIPMENT PROVIDERS 1
Bedeschi adds new experiences
Bedeschi is an organization serving worldwide many costumers in different industries providing integrated solutions through an extensive commercial and technical network able to meet any costumer need. The article describes some of the latest major realizations.
EQUIPMENT PROVIDERS 2
3D technology comes to the construction industry
Cementos Tudela Veguin is acentury-old company, a pioneer in the manufacture of cement in our country, which in recent times in a scenario ofout right recession in its core business, has made a clear and strong Commitment to research and innovation in its sector.
In this article presents a brief CON3D development project recently completed. This project is a pioneer in Spain and globally on the use of 3D printing technology in the construction industry.
Throughout the article the basic characteristics of the 3D technology and the characteristics of the materials and manufacturing methods associated with this technology are presented, with emphasis on short comings also presenting today the technique and our future commitment to correct and go for what has been called the third industrial revolution.
EQUIPMENT PROVIDERS 3
Copisa Group launches an inspection service with drones and artificial vision to detect construction failures
Copisa Group, through the company CPI Integrated Services, has launched their new IRIS Project (Industrial Recognition & Inspection System), an engineering, constructing and exploitation system with drones equipped with a thermal imaging camera. This system, the first in the industry, allows technical inspection and maintenance of buildings and infrastructures, and is aimed at construction and services companies, engineers, managers and owners of infrastructures.
Thermal mass: a benefit not taken into account on precast concrete construction
The re-cast Energy Performance of Buildings Directive (EPBD) will require that from 2019 onwards "all the new buildings occupied and owned by public authorities are nearly zero-energy buildings" (nZEB) and from 2021 "all new buildings are nearly zero-energy buildings".
The European Member States ‘shall draw up national plans for increasing the number of nZEBs. Most of the known design measures to approach on achieving this goal are being already applied but just a few are focused to the construction materials contribution.
Concrete, and in particular its industrialized version as precast elements manufactured on a controlled environment, provides the ideal material basis to fulfil most of the technical requirements that building codes require (durability, fire resistance, acoustic insulation). Concrete has been portrayed as a “traditional”
rather than “modern” material, but there are a wide range of applications where the intrinsic benefi ts of concrete offer specifiers and contractors an optimum solution. But it has also an additional inherent characteristic that has been hardly ever used: its thermal mass.
SECURITY AND HEALTH 1
Critical review of risk assessment as a cornerstone of the prevention system
The assessment of risks at the workplace is the cornerstone of the Risk Management System according to the Prevention of risks at work Law 31/1995. The risk prevention concept has been taken from other fields such as the financial, environmental or engineering. Its application in the prevention of occupational risks presents some difficulties, especially at the quantification phase. Among the various challenges for this assessment are the information transmission, the implication of the persons involved, the training of the assessor. Several solutions are available, such as technicians training, active engagement of the company members involved, and organization policy.
SECURITY AND HEALTH 2
“Fall protection system in the front” and the integration of safety management in the Compañía General de Canteras
Protection elements for workers are essential in the culture of the company. Therefore, within Compañía General de Canteras (CGC), integrated inside FYM (Financiera y Minera), Spanish subsidiary company of Italcementi Group, there is a deep worry about health and safety at work. It is a key factor that shows the importance that workers have inside CGC. CGC has implemented, by means of the labour risk prevention system of FYM, a health and safety policy that has reduced the accident rate to a very low value, under the average of the sector.
Keeping the accident rate in such low values means a global involvement of the company, where the main priority is guarantying that every worker can develop his work in a safety environment. In CGC, necessary human and economic resources are available and employees and their representatives are encouraged to directly participate in the implementation and management of safety systems.
Precast Concrete Bridges
Indeed, solutions involving a precast deck, generally comprising large members, and a stayed bridge system, used not only on the grounds of its structural eff ectiveness but as an evolutive system, have eliminated the specific span limitations affecting prefabrication and increased its competitiveness enormously.
The truly beneficial advances in recent years in transversal deck constitution using strut bracing and precast members in general have made it possible to build very wide decks with lightweight as well as highly aesthetic single box beams. All the forgoing has substantially enhanced the three essential advantages listed at the beginning of this section. The prefabrication industry has, in a period of barely 50 years, proved able to respond to important challenges, solving many problems and creating technology that has led to solutions that are of greater technological excellence, more cost-competitive, of higher aesthetic quality and faster to build.
Fib Commission 6 (Prefabrication) developed, in its Bulletin 29, a State of the Art Report called “Precast Concrete Bridges” which was a good fi rst step in the dissemination of knowledge in this field. The intention of this paper is to provide a description of the present status of development of solutions for precast concrete bridges, of which there is now an astounding variety.
The rehabilitation of the Cristo del Amor bridge in Marbella
The rehabilitation of the Cristo del Amor bridge over the “La Represa” park in Marbella in September 2014 confirms the bet of the City Hall to take care of the city image and its emblematic places.
The city authorities, commissioned to C.I.M.A. the rehabilitation of this bridge that links the areas of Leganitos and Santa Marta. The bridge presented signs of surface oxidation on metallic galvanized
steel tubes covering the tensioning cables that sustain it.