Slovak Journal of Civil Engineering最新文献

Repair of Cracks in Concrete with the Microbial-Induced Calcite Precipitation (MICP) Method 用微生物诱导方解石沉淀（MICP）法修复混凝土裂缝

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0021

Hacer Bilir Özhan, Musa Yildirim, Hamdi Öğüt, H. Öz

引用次数: 0

The Angle of the Shear Resistance of Danube Gravel Derived from the Dynamic Penetration Test 动态渗透试验得出的多瑙河砾石抗剪角度

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0026

E. Kučová, Jana Frankovská

引用次数: 0

Analysis of the Indoor Climate in a Small, Newly-Built Auditorium 新建小型礼堂的室内气候分析

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0025

Mária Budiaková

引用次数: 0

The Use of Vertical Gardens as a Network of Urban Navigation Elements with a Positive Impact on Biodiversity and Microclimate in a Dense Urban Environment 利用垂直花园作为城市导航元素网络，对密集城市环境中的生物多样性和微气候产生积极影响

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0027

Miriam Zaťovičová, Martina Majorošová

{"title":"The Use of Vertical Gardens as a Network of Urban Navigation Elements with a Positive Impact on Biodiversity and Microclimate in a Dense Urban Environment","authors":"Miriam Zaťovičová, Martina Majorošová","doi":"10.2478/sjce-2023-0027","DOIUrl":"https://doi.org/10.2478/sjce-2023-0027","url":null,"abstract":"Abstract Horizontal green areas are becoming valuable, yet extruded spots, and their constant elimination at the expense of commercial and housing developments is disrupting green infrastructure. Interlocked existing urban structures seldom allow for the creation of parks and larger green open spaces, which could provide a habitat for a wide range of insects, birds, and other small animals. The lack of green spaces causes urban heat islands (UHI) over the cities. Vertical gardens are alternative solutions for urban areas, where it is not possible to increase biodiversity by creating new horizontal green areas. They effectively utilise surfaces that would otherwise be unused and transform them into effective green infrastructure elements. Using the example of the historical city district of Bratislava, i.e., Old Town (Staré Mesto) in Slovakia, we present an alternative approach for resolving the lack of green areas. A case study was conducted to create a map of all the potentially suitable areas for the construction of vertical gardens. We divided these spots into three groups, i.e., walls, columns, and free-standing structures and proposed construction methods for each type. Regarding the placement of potentially suitable areas along the roads connecting important transport hubs with the city centre, we created an original proposal for a district-wide network of vertical gardens as orientation elements for tourists and residents with significant aesthetic merit as well as ecological and hygienic values.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"41 5","pages":"47 - 56"},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Recovered Fibers on the Behavior of Concrete in Tension 回收纤维对混凝土拉伸行为的影响

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0024

Djamal Atlaoui, A. Adjrad, Y. Bouafia

引用次数: 0

Behavior of an Embankment on Stone Column-Reinforced Soft Soil 石柱加固软土上的堤坝行为

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0022

T. A. Wassie, Gökhan Demir

{"title":"Behavior of an Embankment on Stone Column-Reinforced Soft Soil","authors":"T. A. Wassie, Gökhan Demir","doi":"10.2478/sjce-2023-0022","DOIUrl":"https://doi.org/10.2478/sjce-2023-0022","url":null,"abstract":"Abstract Reinforcing soft soils with good drainage and load-bearing material is a common practice in the construction of embankments. Stone columns are among the granular materials that accelerate consolidation settlements due to their high drainage capacities. This study aims to investigate the behavior of an embankment on stone column-reinforced soft soil. The embankment was analyzed using the Plaxis 2D Finite Element Method. The columns were converted into equivalent walls using the plane strain conversion method. This method was validated with field measurement results from previous studies and showed good agreement. According to the research findings, stone columns significantly reduced deformations and improved consolidation. For instance, the ultimate settlement was decreased from 54.3 mm to 33.1 mm for 10% and 20% area replacement ratios, respectively. As the safety analysis verified, basal geosynthetics contributed substantially to the embankment’s stability. Furthermore, the safety factor values increased for all stages of the construction, and the global safety factor increased at the end of the construction. Stone columns and basal geogrid-reinforced soft soil can reduce settlement and increase the stability of an embankment.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"56 5","pages":"9 - 15"},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Contribution to Study the Physico-Mechanical and Thermal Properties of Lightweight Cellular Concrete Prepared With Different Types of Sand and Waste Marble Powder 用不同类型的砂和废大理石粉制备轻质蜂窝混凝土的物理力学性能和热性能研究的实验贡献

IF 0.4

Slovak Journal of Civil Engineering Pub Date : 2023-12-01 DOI: 10.2478/sjce-2023-0023

Moufida Bourema, I. Goual, A. Ferhat

{"title":"Experimental Contribution to Study the Physico-Mechanical and Thermal Properties of Lightweight Cellular Concrete Prepared With Different Types of Sand and Waste Marble Powder","authors":"Moufida Bourema, I. Goual, A. Ferhat","doi":"10.2478/sjce-2023-0023","DOIUrl":"https://doi.org/10.2478/sjce-2023-0023","url":null,"abstract":"Abstract Algeria is currently undergoing an evolution in civil engineering, which has resulted in a higher use of aggregates, especially sand. This study contributes to the development of locally produced materials. Its goal is to explore how the type of sand and waste marble powder (WMP), which can be used as a partial replacement of cement and aluminum powder (Al) with different percentages as an expansive agent, can affect physico-mechanical properties such as the bulk density and mechanical strength at 28 and 90 days, as well as the thermal conductivity of lightweight cellular concrete. Non-autoclaved cellular concretes (CC) were investigated based on three types of sand, i.e., sea sand (SS), river sand (RS), and waste marble sand (WMS); a hydraulic binder (a mix of cement and waste marble powder), and aluminum powder. The experimental results indicate that the nature and particle size distribution of the sand used had an impact on the properties of the CCs. Furthermore, it can be seen that the increased aluminum contents decrease the density, mechanical strength, and thermal characteristics of the CCs. Using 10-15% WMP as a cement substitute improves the mechanical strength, offers better thermal conductivity values, and contributes to sustainable development by developing a new class of environmentally friendly cellular concrete.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"27 9","pages":"16 - 25"},"PeriodicalIF":0.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of the Constructive Nonlinearity of Ribbed Reinforced Concrete Slabs of Self-Stressed Covering Panels 钢筋混凝土带肋板自应力复盖板结构非线性计算

Slovak Journal of Civil Engineering Pub Date : 2023-09-01 DOI: 10.2478/sjce-2023-0016

Anton Hasenko, Volodymyr Semko, Serhii Skliarenko

{"title":"Calculation of the Constructive Nonlinearity of Ribbed Reinforced Concrete Slabs of Self-Stressed Covering Panels","authors":"Anton Hasenko, Volodymyr Semko, Serhii Skliarenko","doi":"10.2478/sjce-2023-0016","DOIUrl":"https://doi.org/10.2478/sjce-2023-0016","url":null,"abstract":"Abstract Precast reinforced concrete constructions meet the requirements of industrialization, high manufacturability, and cost-effectiveness at a reasonably high level. The ribs in constructions perform load-bearing functions, and the slab part performs enclosing functions. Often before the installation of such structures at a construction site, they are mounted from assembly elements. The overall dimensions of the elements are limited by transportation requirements. During such an aggregated mounting, the assembly units work according to a calculation scheme that differs from an operational scheme. The structural nonlinearity of ribbed reinforced concrete slabs during transportation, mounting, and installation, and the operation of a combined spatial covering panel were investigated in this paper. The effects were identified, and a rational design of nodes connecting the individual prefabricated units into a spatial structure was developed. With the help of these nodes, it is possible to create unloading support moments, which will reduce the internal forces in the design cross-sections. The effects of changes in the width of the reinforced concrete slab shelves on the internal forces of the load-bearing ribs of a wall and a roof panel were investigated.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135588658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and Modification of Chip-Cement Wooden Composites Based on Recycled Plastics 基于再生塑料的木屑水泥复合材料的制备与改性

Slovak Journal of Civil Engineering Pub Date : 2023-09-01 DOI: 10.2478/sjce-2023-0020

Terézia Cabanová

{"title":"Preparation and Modification of Chip-Cement Wooden Composites Based on Recycled Plastics","authors":"Terézia Cabanová","doi":"10.2478/sjce-2023-0020","DOIUrl":"https://doi.org/10.2478/sjce-2023-0020","url":null,"abstract":"Abstract The production of plastics and the associated increasing amount of plastic waste is currently a serious environmental problem that has a negative impact on the environment. It is necessary to develop new methods of recycling and also solutions for the further use of already recycled plastics. Thus far, a lot of research has been devoted to this issue, which focuses on the effective recycling and reuse of recycled plastic in the construction sector. One of the possibilities is the application of a filler substitute in concrete, which is an economically and ecologically advantageous solution that ensures optimal thermal insulation and acoustic properties. The aim of this study was to analyze the potential replacement of conventional aggregates in lightweight concrete, with a filler made of recycled plastic with a lower bulk density. In the research, wood chips were used in combination with recycled waste fillers including polystyrene (SE), polyethene (SP), and polyurethane foam (SU) in ratios of 1:3, 1:1, and 3:1 as an alternative to conventional filler. Concrete composites from these materials were prepared and characterized by their bulk density, thermal conductivity and compressive strength parameters.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135588670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raising of Embankment of an Ore Tailings Pond and an Analysis of its Stability 某矿砂尾矿库路基的抬升及其稳定性分析

Slovak Journal of Civil Engineering Pub Date : 2023-09-01 DOI: 10.2478/sjce-2023-0017

Dagmar Chropeňová, Ivan Slávik

引用次数: 0