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Effects of Coarse Aggregate Rap Content on the Mechanical and Shear Performance of HMA by the UPT Method 用UPT法研究粗集料Rap含量对HMA力学和剪切性能的影响
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-06-01 DOI: 10.2478/sjce-2023-0014
M. Khabiri, Meysam Saboohi
{"title":"Effects of Coarse Aggregate Rap Content on the Mechanical and Shear Performance of HMA by the UPT Method","authors":"M. Khabiri, Meysam Saboohi","doi":"10.2478/sjce-2023-0014","DOIUrl":"https://doi.org/10.2478/sjce-2023-0014","url":null,"abstract":"Abstract In recent years, the use of materials derived from recycled asphalt has attracted the attention of airfield and highway construction researchers. Since the making of these products is economically cost-effective, one idea about how to use them is to use coarse-grained crumbs from recycled Asphalt Pavement (RAP), which are agglomerates that can be found in coarse RAP, as a replacement for virgin asphalt.The goal of the current study is to investigate the performance of hot mix asphalt created with various percents of RAP. The punching shear strength of cylindrical specimens versus the penetration of steel rods with fixed and determined diameters into an asphalt specimen is one of the tests used to study the shear strength of asphalt. Other typical tests include a test of the structural strength and resilient modulus with two rectangular and sinusoidal loading shapes, respectively, as well as the specimen's strength against different temperatures of asphalt mixtures containing 10, 20, and 30% coarse-grained RAP. The results show that the resilient strength of the samples with a maximum 30% coarse-grained RAP is within reasonable limits. Furthermore, the semi-sinusoidal loading has a higher resilience modulus than rectangular loading. It is also observed during uniaxial penetration testing (UPT) that increasing the RAP increases the penetration of the steel rod, thereby implying that the shear strength of the asphalt has decreased.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"70 - 78"},"PeriodicalIF":0.4,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48650117","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
A Comparison of Cadastre in Slovakia and Poland 斯洛伐克和波兰地籍制度比较
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0001
Magdalena Jurkiewicz, Ľ. Hudecová, Peter Kyseľ, P. Klapa, M. Mika, M. Ślusarski
{"title":"A Comparison of Cadastre in Slovakia and Poland","authors":"Magdalena Jurkiewicz, Ľ. Hudecová, Peter Kyseľ, P. Klapa, M. Mika, M. Ślusarski","doi":"10.2478/sjce-2023-0001","DOIUrl":"https://doi.org/10.2478/sjce-2023-0001","url":null,"abstract":"Abstract Many analogies can be drawn from the cadastre in Poland and Slovakia, because of the partly shared history of the Austro-Hungarian Empire, World Wars I and II, and the influence of the Communist regime. However, its development over the years has taken different forms and rules of operation in both countries. Currently, from a European perspective, there are efforts to standardise cadastral systems to expand their functionality for land administration and to accommodate social needs. The aim of this article is to discuss and provide a detailed comparative analysis of the general principles of the cadastre in Slovakia and Poland. The study shows similarities but also many differences between the systems in both countries, which indicates that it could be a difficult path to unify the cadastral systems within the European Union. A comparison of the solutions used in other countries allows us to see potential opportunities for the development and modernisation of the existing cadastral systems.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"1 - 9"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42530152","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: 1
Dam Incidents and Failures – Cases in the Czech Republic 大坝事故和失败——捷克共和国的案例
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0003
Stanislav Kotaška, J. Říha
{"title":"Dam Incidents and Failures – Cases in the Czech Republic","authors":"Stanislav Kotaška, J. Říha","doi":"10.2478/sjce-2023-0003","DOIUrl":"https://doi.org/10.2478/sjce-2023-0003","url":null,"abstract":"Abstract Dam incidents and failures mainly occur during extreme floods. In the Czech Republic (CR), large-scale regional floods were recorded in different regions in 1985, 1987, 1997, 2002, 2006, 2010, and 2013, while local floods especially occurred in 1991, 1996, 1997, 1998, 2002, 2004, 2005, 2009, and 2010. During these events, numerous incidents and total breaches of small dams were recorded, and a few large dams were also critically endangered, although they were not completely breached. This paper presents a comprehensive summary of incidents and failures affecting small dams in the CR since 1985. The most significant incidents concerning large dams are listed as well. The statistics show that 62 small dams were completely breached and that 350 were seriously damaged over 35 years in the period 1985–2020. The annual frequency amounts to 1.85 collapsed and 10 small damaged dams per year. The most common causes of the complete breaching of dams were overtopping (85 %) and internal erosion (15 %).","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"22 - 33"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45425577","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: 1
A New Perspective on Residential Building Ventilation from the Point of View of Achieving the Desired Indoor Air Quality using Different Ventilation Systems 从不同通风系统实现理想室内空气质量的角度看住宅建筑通风的新视角
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0005
Zuzana Straková, Ju. A. Markova
{"title":"A New Perspective on Residential Building Ventilation from the Point of View of Achieving the Desired Indoor Air Quality using Different Ventilation Systems","authors":"Zuzana Straková, Ju. A. Markova","doi":"10.2478/sjce-2023-0005","DOIUrl":"https://doi.org/10.2478/sjce-2023-0005","url":null,"abstract":"Abstract The case study analyses a specifically described situation from the present and a summary of events from the past, finds alternative solutions, and decides on one of them. The target of such a detailed analysis was a concrete apartment building, which was still in the project phase; the efforts to change its proposed air conditioning system to a more energy-efficient one are the subject of the case study. Apartment buildings with modern technology installed in terms of sanitary equipment, heating, and simple methods of ventilation and cooling do not constitute part of the project. Through a detailed analysis of the calculation of the heat losses through ventilation in the case of local and decentralised ventilation applied to one apartment unit, this failure to address modern solutions is remedied.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"45 - 51"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48097865","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
The Impact of Climate Change and Regulation of the Water Regime on the Morphological Structure of the Floodplain Forests in Petržalka, Slovakia 气候变化和水态调控对斯洛伐克Petržalka漫滩森林形态结构的影响
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0006
Viktória Gáspár, A. Škrinár
{"title":"The Impact of Climate Change and Regulation of the Water Regime on the Morphological Structure of the Floodplain Forests in Petržalka, Slovakia","authors":"Viktória Gáspár, A. Škrinár","doi":"10.2478/sjce-2023-0006","DOIUrl":"https://doi.org/10.2478/sjce-2023-0006","url":null,"abstract":"Abstract The main landscape-forming component has always been the forests in the lowlands. The devastation and disturbance of forest areas by anthropogenic activity change the ecological conditions in their environment. Climate and atmospheric changes affect the balance of the mutual relationships between individual components, as well as the existence of direct and feedback relationships in forest ecosystems. The transformation of bioclimatic and ecological conditions have caused the degradation of the Pannonian floodplain forest communities in Slovakia. Urbanization in Bratislava has caused the fragmentation of the surrounding forests. With changes in sunlight and heat conditions, flood-plain communities are forced to become acclimatized to drier conditions, which lead to morphological and structural changes in their composition. In this study we examined phytocenological records from 1999 to 2020 from various sources. The survey points to the impact of climate change and anthropogenic influences on biodiversity. The absence of floods and the drying of floodplain forest soils could have caused this change in the species' composition.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"52 - 57"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44308752","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
Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization 硬化加速剂(X-Seed 100 BASF, PCC, LKD和SALT)作为土壤稳定的强度增强添加剂溶液
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0002
P. Lindh, Polina Lemenkova
{"title":"Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization","authors":"P. Lindh, Polina Lemenkova","doi":"10.2478/sjce-2023-0002","DOIUrl":"https://doi.org/10.2478/sjce-2023-0002","url":null,"abstract":"Abstract This study is aimed at evaluating the strength of stabilised soil collected from the Port of Norvik, Stockholm, Sweden, where 350,000 m3 of clay had to be stabilized. The tests were performed in the laboratory of the Swedish Geotechnical Institute (SGI). The soil was stabilised by binder mixtures using Portland cement clinker (PCC) and lime and lime kiln dust (LKD). Accelerators (X-seed 100 BASF, PCC, LKD and salt) were added to the soil samples for quicker stabilization. The strength of the stabilised soil was assessed using resonance frequency measurements of seismic P-waves by an ICP accelerometer in order to estimate the shear strength of the soil and to evaluate the effects from the accelerators, binder ratios, and the curing temperature on the gains in stabilization and strength. Various proportions of the binders were tested, i.e.: 50/50 cement/lime and 50/50 PCC/lime. The temperature was measured using a calorimeter in double experiments. The results showed that the accelerators improve the strength in the stabilized specimens and enhance the soil performance for engineering construction work.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"10 - 21"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48264116","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: 1
Investigation of the Effects of Additives used in Reducing Asphalt Production Temperatures 添加剂在降低沥青生产温度中的作用研究
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2023-03-01 DOI: 10.2478/sjce-2023-0004
Süleyman Nurullah Adahi Şahin, M. İpek, Mehmet Bariş Gökçek
{"title":"Investigation of the Effects of Additives used in Reducing Asphalt Production Temperatures","authors":"Süleyman Nurullah Adahi Şahin, M. İpek, Mehmet Bariş Gökçek","doi":"10.2478/sjce-2023-0004","DOIUrl":"https://doi.org/10.2478/sjce-2023-0004","url":null,"abstract":"Abstract This study is related to evaluations of the performance and usability evaluations of existing and also newly produced Warm Mixed Asphalt (WMA) additives. Viscosity, softening point, and penetration tests were performed on bitumen with additives without changing the bitumen rate for the additives. For the asphalt concrete, Marshall Stability tests were performed. WMA additives are used to reduce asphalt production temperatures and, consequently, the temperature of the mixture significantly. According to the Marshall Stability test, it was determined that the WMA samples fulfilled values within the local standards. The Hot Mixed Asphalt (HMA) and Warm Mixed Asphalt (WMA) additives were compared as to additive costs and energy savings considering the reduced production temperatures. Additives have great potential to be used in adverse weather conditions and in many countries.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"31 1","pages":"34 - 44"},"PeriodicalIF":0.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42239923","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
Physical-Mechanical Properties of Waterproofing Materials Applied to Roofs in the Context of UV Degradation 紫外线降解条件下屋顶防水材料的物理力学性能
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sjce-2022-0027
Jozef Kováč, M. Palko, A. Kleinová
{"title":"Physical-Mechanical Properties of Waterproofing Materials Applied to Roofs in the Context of UV Degradation","authors":"Jozef Kováč, M. Palko, A. Kleinová","doi":"10.2478/sjce-2022-0027","DOIUrl":"https://doi.org/10.2478/sjce-2022-0027","url":null,"abstract":"Abstract The subject of the article is a physical-mechanical analysis of waterproofing materials exposed to an external environment. Physical and mechanical properties have a direct impact on the life of waterproofing materials and their later remediation. In the introduction, the factors influencing the properties of waterproofing materials are presented. The main part of the article covers the basic possibilities of testing the materials testing the materials, normative testing conditions, and critical aspects of their implementation. In this article we deal with the laboratory testing of a waterproofing membrane based on PVC-P in terms of its degradation from UV radiation, humidity, and the temperature.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"30 1","pages":"39 - 48"},"PeriodicalIF":0.4,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68917223","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
Redesign of an Intake Fish Pass Structure 进气鱼道结构的重新设计
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sjce-2022-0028
L. Čubanová, P. Dusicka, Martin Orfánus, J. Rumann
{"title":"Redesign of an Intake Fish Pass Structure","authors":"L. Čubanová, P. Dusicka, Martin Orfánus, J. Rumann","doi":"10.2478/sjce-2022-0028","DOIUrl":"https://doi.org/10.2478/sjce-2022-0028","url":null,"abstract":"Abstract The article describes the process of redesigning the intake structure of the fish pass at the Žilina water structure in Slovakia. The existing intake structure does not meet the passability requirements for the target species of migratory fish. A design utilizing intake windows at various levels that cover fluctuations in the water level in the reservoir, which has been successfully used for other water structures, has been proposed. The new design was subjected to hydraulic calculations and simulations in the HECRAS 2D, 2D numerical model in order to achieve the required parameters such as the discharges, depths, and velocities within the limits for the specified fish zone.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"11 1","pages":"49 - 54"},"PeriodicalIF":0.4,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68917230","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: 1
Comparative Study of Lightweight Concretes Based on Hemp and Flax Straw 大麻与亚麻秸秆轻质混凝土的对比研究
IF 0.4
Slovak Journal of Civil Engineering Pub Date : 2022-12-01 DOI: 10.2478/sjce-2022-0023
M. Babenko, A. Eštoková, S. Unčík, M. Savytskyi
{"title":"Comparative Study of Lightweight Concretes Based on Hemp and Flax Straw","authors":"M. Babenko, A. Eštoková, S. Unčík, M. Savytskyi","doi":"10.2478/sjce-2022-0023","DOIUrl":"https://doi.org/10.2478/sjce-2022-0023","url":null,"abstract":"Abstract The article presents the results of a study involving the properties of flax and hemp-based lightweight concretes as well as the initial characteristics of different straw-based materials. A comparison of straw-based lightweight concretes with and without ordinary Portland cement (OPC) showed that hemp concrete has a 5.6 % higher strength at a 10% deformation, and at the same time, has a 13% greater thermal conductivity coefficient than flax concrete. The physical-chemical study based on a thermal analysis in an air environment has shown that the overall picture of thermal degradation for flax and hemp concretes is similar. Nevertheless, additional peaks of mass loss have been defined for flax concrete. The demonstrated exothermal process is a positive aspect, considering the life cycle of the material and the recycling stage. The paper proposes reference points for the development of new building materials based on straw.","PeriodicalId":43574,"journal":{"name":"Slovak Journal of Civil Engineering","volume":"30 1","pages":"11 - 16"},"PeriodicalIF":0.4,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44143075","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: 1
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