<abstract xmlns="http://www.w3.org/1999/xhtml">

The aim of the work: consists of significantly reducing the number of road disasters. The objectives of the investigation: to outline the causes that generate serious traffic accidents on Stefan cel Mare Boulevard, to make rational analysis and planning of measures to improve the situation, to unveil the existing problems on local level, the composition of traffic flows, as well as skills of specialists in the realm, to develop a strategy on road accidents resulting in casualties aiming to reduce the number of traffic accidents with injuries, to promote measures aiming to protect participants in traffic, to developing a set of procedures and functions which would provide, in a network of certain streets, the size and structure of traffic flows, areas (major and minor intersections, streets) where there is an increased risk of accidents; to identify possible solutions aiming to increase road safety, specific peculiarities of Chisinau city.
</abstract>

Improvement of Safety of Road Infrastructure and Transport Networks

<abstract xmlns="http://www.w3.org/1999/xhtml">

Both at national and international level, the present-day trends relate to the development of high-performance enclosing and insulation systems that make use of modern thermo-energetic rehabilitation methods.
Thermal rehabilitation works for the envelope of a building or for the building elements forming the envelope concern the diminishing of the heat losses by increasing the thermal resistances of the enclosing elements and limiting air infiltrations through glazed elements and joints.
In most Western European countries, national programmes aiming at the thermal protection of the buildings have been developed. The projects ran in gradual stages, starting after the energy crisis in 1973 and 1979, the outcome being a reduction of the energy consumption.
According to the Energy Performance of Buildings Directive issued by the European Commission, at present, buildings are responsible for approximately 40% of EU energy consumption and 36% of the energy-related greenhouse gas emissions (<ext-link ext-link-type="uri" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://energy.ec.europa.eu/topics/energy-efficiency/energy-efficient-buildings/energy-performance-buildings-directive_en">https://energy.ec.europa.eu/topics/energy-efficiency/energy-efficient-buildings/energy-performance-buildings-directive_en</ext-link>).
In the paper, a case study is presented, analysed from the point of view of energy efficiency through a new software for computing developed by the author called REBUILD, which leads to the choice of appropriate solutions for the thermal rehabilitation of an element of the building envelope. The recommended solution after the study is intended to bring the structure back to its optimal energy performance and to abide by the current regulations.
</abstract>

Thermal Rehabilitation of External Walls – Case Study

<abstract xmlns="http://www.w3.org/1999/xhtml">

The aim of this article is to show the impact of adjustments in construction projects. The methodology and impact of costs in construction are analyzed by applying the formula for calculating the cost of price adjustments based on inflation. The cost of a project is defined by its direct and indirect costs, but in projects carried out by the state, there are adjustments to the cost. The adjustment cost is intended to take over a price increase due to changes that are not related to the project and are related to the market economy of the construction industry.
</abstract>

cornel-adrian.ciurusniuc@student.tuiasi.ro

Methods of Adjustments the Cost in Constructions

<abstract xmlns="http://www.w3.org/1999/xhtml">

Microconcrete is an important subclass of regular concrete that lacks the coarse aggregate commonly found in standard concrete. This makes it a good candidate for certain casting operations, such as densely reinforced elements. Microconcrete also tends to have better workability and smoother flow in formwork elements than regular concrete. However, one of humanity’s current problems is air pollution caused by chemical, physical, or biological agents with harmful effects on the environment. Carbon dioxide (CO2) resulting from cement production is a major atmospheric pollutant. To align with sustainable development standards, the construction industry must seek alternative materials that are more environmentally friendly. This article presents a comparison of the properties of regular microconcrete and microconcrete with additives such as fly ash and ultrafine silica. This topic is important because environmental issues are becoming more pressing. The results show that using waste products as additives in microconcrete can provide a sustainable solution for reducing carbon dioxide emissions and environmental impact. Although lower strengths were obtained compared to traditional concrete, microconcrete with waste products can be used in various applications, such as the production of prefabricated construction elements or the rehabilitation of existing structures. Additionally, it can be used in the construction of paving stones, sidewalks, or industrial floors, contributing to reducing pollution and environmental impact.
</abstract>

Properties of Microconcrete Produced with Fly Ash and Ultrafine Silica

<abstract xmlns="http://www.w3.org/1999/xhtml">

With the global energy crisis and the emergence of sustainable development issues, architectural design must be mastered, not only to ensure a comfortable indoor environment, but also to control energy consumption and its impact on the environment. Comfortable buildings, energy efficiency, and positive energy buildings are all current issues that require knowledge of the basic principles of sustainable development in buildings. Moreover, understanding the values that characterize materials is essential today to choose products wisely from a technical and economic point of view. This work proposes to articulate them by focusing on Functionally graded material (FGM) as a design tool. Thus, it seeks to contribute to convert the concept of gradient into reality with accuracy and precision thanks to the manufacturing processes based on the new technology.
</abstract>

Laboratoire d’Electrochimie et Environnement (LEE), École Nationale d’Ingénieurs de Sfax, ENIS, Sfax

Les Matériaux Innovants Vers Une Nouvelle Ère De Conception Architecturale Innovative Materials for a New Era of Architectural Design

<abstract xmlns="http://www.w3.org/1999/xhtml">

The concept of green energy and sustainability is no longer just an abstract idea intended exclusively for theoretical, numerical and experimental studies, but a “must” of our days. It is a reality that needs to be applied now, not later. Photovoltaic panels are an essential tool in implementing the idea of sustainability, green energy and NZEB (Net Zero Energy Building). Moreover, photovoltaic thermal panels represent the next step, being the main actor in increasing the efficiency of photovoltaic systems. The main challenge is the amount of electrical energy and thermal energy produced by these systems, which leads us to the need to determine the optimal method of cooling the PV. The current working document is intended to be a review of PV cooling methods, how their efficiency is influenced and a preamble for further research on how to optimize photovoltaic / thermal panels integrated in buildings.
</abstract>

Cooling Methods of Photovoltaic/Thermal Panels. State-of-the-Art Review

<abstract xmlns="http://www.w3.org/1999/xhtml">

This study investigates the behaviour and failure mechanisms of beam-to-column dowel connections in precast industrial halls under lateral loads. Two large-scale cyclic tests were performed to evaluate the assembly failure and its relationship with the dowel connection. The results demonstrated that the assembly failure coincided with the dowel connection failure, governed by dowel yielding and concrete spalling of the column fork. No significant damage was observed in the concrete elements outside the connection area. The dissipative failure mechanism of the column was not achieved, indicating that this dowel connection is not capable to transmit sufficient lateral load. The maximum capacity of the dowel connection was influenced by the concrete coverage of the dowel in relation to the side of the column fork. This research serves as a basis for further investigation and potential improvements in the design and performance of connections in precast concrete structures.
</abstract>

Cyclic Testing of Beam to Column Dowel Connection

<abstract xmlns="http://www.w3.org/1999/xhtml">

This article explores soil classification methods and the influence of using dispersing agents in various amounts for the soil particle size analysis. Laboratory testing with different dispersing agents was conducted to analyze the effects of sodium hexametaphosphate and lithium carbonate for two different soils with plasticity indices indicating one to be with low plasticity (PI = 8.23 %) and the other one with high plasticity (PI = 39 %). The article highlights differences in the granulometric fractions reported for each soil and usage of the same dispersing agent but in various amount. Thus, the classification of soils is influenced by the amount of the used dispersing agents, recommendations of standards being different in time and countries. These findings contribute to a better understanding of the anticipated behavior of fine soils and provide useful insights for various geotechnical applications.
</abstract>

andree-vasilica.dascalu@student.tuiasi.ro

The Influence of Dispersing Agents on Soil Particle Size Analysis

<abstract xmlns="http://www.w3.org/1999/xhtml">

The concept of energy is closely related to the building sector and the systems used for heating, implicitly energy saving which is a current problem of both old and new buildings. In this paper a series of numerical simulations were made in Autodesk CFD Simulation in order to study the influence of terminal heating systems over the thermal comfort in rooms. Three case solutions were analysed, as follows: heating a room using a steel radiator, heating a room using an aluminium radiator and heating a room using underfloor heating. The values resulted through numerical simulations for the average room temperature were compared with the values for ideal heating. It was observed that underfloor heating is the most efficient source of heating among those analysed. Compared to heating using radiators, the temperatures along the length and height of the room using underfloor heating are constant and close to the ideal heating. The human body feels the most comfortable due to the uniform distribution of temperature from ground level, on height.
</abstract>

stefanica-eliza.vizitiu@student.tuiasi.ro

Thermal Comfort Analysis in Rooms Using Low Temperature Convective and Radiant Heating Terminals

<abstract xmlns="http://www.w3.org/1999/xhtml">

3D printed concrete is a relatively new technology that has been gaining popularity in the construction industry in recent years. It involves the use of a 3D printer to deposit layers of concrete in a pre-determined pattern, gradually building up a three-dimensional structure. This process offers several benefits over traditional concrete construction methods, such as the ability to create complex geometries and reduce material waste. One of the main advantages of 3D printed concrete is its ability to produce highly customized and unique designs that would be difficult or impossible to achieve using traditional construction techniques. Additionally, the precision of the 3D printing process allows for greater control over the properties of the concrete, such as its strength and porosity, which can be tailored to suit the specific requirements of the project. Another benefit of 3D printed concrete is its potential for sustainability. By minimizing material waste and using eco-friendly materials, this technology has the potential to reduce the environmental impact of construction.
</abstract>

Investigations Regarding Concrete Mixes Suitable for 3D Printing

AHEAD OF PRINT

Volume 68 (2022): Issue 1 (March 2022)

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Volume 67 (2022): Issue 3 (September 2022)

Volume 67 (2021): Issue 2 (June 2021)

Volume 67 (2021): Issue 1 (March 2021)

Bulletin of the Polytechnic Institute of Iași. Construction. Architecture Section

 The Construction. Architecture section, as part of the Bulletin of the Polytechnic Institute of Iaşi founded in 1946, appears as separate publication since 1969. Currently, it is issued in both printed and electronic edition, on a quarterly basis, and is included in a library exchange program with other publications.  The Construction. Architecture section is a technical scientific journal which is devoted to original and interdisciplinary, peer-reviewed papers on theoretical and applied research within the broad field of civil engineering and architecture, which includes, but are not limited to, the following: building materials and equipment, composite structures, building equipment engineering, construction management, environmental engineering, geotechnical engineering, highway engineering, information technology, railroad engineering, structural engineering, transportation engineering, tunnel engineering, seismic hazard studies and methods for mitigation of earthquake risk, urbanism, landscape architecture, architecture and design.  At this time, there is no article processing charges (APCs) nor article submission charges and all content is freely available. The journal provides immediate open access to published content in support of the idea that free access to research helps support the exchange of knowledge and ideas.  The review process of each submitted paper includes an anti-plagiarism test with specialized software and a blind independent review. The main publication language is English.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 