FULL AND PARTIAL STRUCTURES OF HISTORICAL ROOF TRUSSES IN ASSESSMENT OF VOLUME OF TIMBER USED FOR CONSTRUCTION

Magdalena CHYLEWSKA-SZABAT

Abstract Rafter framing is the basic roof frame that, through the trusses, transfers the load from the roofing to the main supports of the building. The construction material of these structures is usually wood. The development of roof framing construction for wider and wider covers has caused an increased demand for construction timber for their construction. This paper points to this economic aspect based on an example of a geometric pattern of a rafter framing based on repetitive construction(..)

DOI: 10.21307/ACEE-2018-033

Published Online: 04-April-2019

CLASSIC PALACE ARCHITECTURE OF THE EASTERN PODILLIA IN UKRAINE: HISTORICAL BACKGROUND AND KEY FACTORS

Oksana KHOROSHA/ Volodymyr SMOLIAK

Abstract The article deals with the palace architecture of the style of classicism in the Eastern Podillia in Ukraine of the late 18th and early 20th centuries, in the context of historical and socio-political backgrounds. This issue remains poorly studied, because it was not considered comprehensively for Eastern Podillia. The purpose of the article is to establish the factors and historical preconditions of the architecture of the palace complexes in accordance with the world tendencies and re(..)

DOI: 10.21307/ACEE-2018-034

Published Online: 04-April-2019

ON ORIENTATION OF VISUALLY IMPAIRED PEOPLE IN PUBLIC SPACE

Beata KOMAR

Abstract The topic of this paper focuses on orientation of visually impaired people in public space. The purpose of the paper is to show the ways visually impaired people move and therefore, to show the barriers which hinder them to get someplace. An important element is to increase social awareness of the quality of public spaces so that they could be adapted to every user. The paper was written on the basis of literature analyses and the author’s own observation.

DOI: 10.21307/ACEE-2018-035

Published Online: 04-April-2019

IN SEARCH OF ARCHITECTURAL FORM – IDENTIFICATION OF PLACE. DESIGN OF A CITY BENCH IN STUDENTS’S PROJECTS (WORKS)

Ewa RACZYŃSKA-MĄKOWSKA/ Romuald FAJTANOWSKI

Abstract Identification of a PLACE through conscious application of given forms correlated with spatial conditions is a demanding task for a designer who needs to take into consideration the context and history of the space they are supposed to function within. The authors of this study have presented four application examples for a city bench as a form interacting with a selected space in Bydgoszcz (350-thousand inhabitants, a town in the north-west Poland, situated at the confluence of two riv(..)

DOI: 10.21307/ACEE-2018-036

Published Online: 04-April-2019

HEALTH-AFFIRMING EVERYDAY LANDSCAPES IN SUSTAINABLE CITY. THEORIES AND TOOLS

Monika TROJANOWSKA/ Aleksandra SAS-BOJARSKA

Abstract As cities and urban population continue to grow, causing serious threats to public health, the development of health-affirming urban landscapes becomes even more important topic than ever before. The purpose of this paper is to answer the question which qualities of urban landscape make it the health-affirming landscape. In the first part of the paper, a concept of health-affirming landscapes and a modern approach to sustainable city design are examined. In the second part, the qualitie(..)

DOI: 10.21307/ACEE-2018-037

Published Online: 04-April-2019

HEALTH-AFFIRMING EVERYDAY LANDSCAPES IN SUSTAINABLE CITY. ECO-NEIGHBORHOODS IN FRANCE CASE

Monika TROJANOWSKA/ Aleksandra SAS-BOJARSKA

Abstract This paper discusses the close relationship between the concept of health-affirming everyday landscapes and the idea of sustainable city design. The French National program of eco-neighborhood certification ÉcoQuartier is described and the correlation between the concepts of health-affirming landscapes, sustainable cities, and eco-neighborhoods is explained using the example of a selected eco-neighborhood in France.

DOI: 10.21307/ACEE-2018-038

Published Online: 04-April-2019

RANDOM STRENGTH PARAMETERS OF STEEL CORRUGATED WEBS AND THEIR INFLUENCE ON THE RESISTANCE OF SIN PLATE GIRDERS

Witold BASIŃSKI/ Zbigniew KOWAL

Abstract In the study, the results of statistical investigations into random strength parameters of steel used to manufacture corrugated webs of SIN plate girders were discussed. The investigations were conducted on samples randomly collected from twenty SIN girders. The corrugated web of the girders was 2, 2.5 and 3 mm in thickness. The girders had been examined before statistical investigations were conducted. Based on the analysis, coefficients of variation of yield strength VRe=D(Re)/E(Re) a(..)

DOI: 10.21307/ACEE-2018-039

Published Online: 04-April-2019

INFLUENCE OF SELECTED ADMIXTURES ON THE MICROSTRUCTURE OF RENOVATION PLASTER MORTARS

Wacław BRACHACZEK

Abstract In the environment in which the renovation plaster mortars are exposed to moisture, followed by the crystallization of salt, their required durability is obtained by aeration. Aeration increases the porosity and resistance to salt crystallization, significantly changing the properties of plaster mortars. The paper presents the results of research on the influence of aeration and hydrophobizing admixtures on the porosity and pore size distribution in renovation plaster mortars. It was fo(..)

DOI: 10.21307/ACEE-2018-040

Published Online: 04-April-2019

DETERMINATION OF MECHANICAL PROPERTIES OF METHYL METHACRYLATE ADHESIVE (MMA)

Abstract Experimental testing of epoxy adhesives, which are commonly used in civil engineering for the strengthening of existing structures with composite products have been a topic of limited studies. It was due to the damage which usually occurred not in the adhesive layer but in the strengthened material. Recent studies have shown that the choice of an adhesive significantly affects the load-bearing capacity of the entire joint. The paper presents the results of strength tests of a selected m(..)

DOI: 10.21307/ACEE-2018-041

PROPERTIES OF COARSE MINERAL AGGREGATES AGAINST PROPERTIES OF CONCRETE

Wojciech PIASTA/ Waldemar BUDZYŃSKI/ Jacek GÓRA

Abstract The paper concerns the effect of coarse aggregate type on the strength and strain properties of concrete under instantaneous loading. The studies deal with properties of the crushed aggregates and their effect on the basic mechanical properties and instant deformability of concretes in comparison to gravel concrete. The paper presents test results of mineral composition, crushing strength, absorption by weight, content of irregular grains and mineral dust as well as bulk and specific de(..)

DOI: 10.21307/ACEE-2018-042

Published Online: 04-April-2019

HEALTH AND SAFETY PERCEPTION OF CONSTRUCTION WORKERS IN SAUDI ARABIA

Muizz O. SANNI-ANIBIRE/ Abubakar S. MAHMOUD/ Mohammad A. HASSANAIN/ Faleh ALMUTAIRI

Abstract Construction is a high-risk industry due to the high rates of accidents/fatalities recorded annually in various countries. Health and safety (HS) is a major concern of the construction industry. More so, for developing countries where HS cultures are yet to become fully established. In such situations, the perception of construction workers is a viable approach to assess the performance of HS. This study investigated the HS conditions in Saudi Arabian construction sites from the perspec(..)

DOI: 10.21307/ACEE-2018-043

Published Online: 04-April-2019

THERMAL IMPROVEMENT IN RESIDENTIAL BUILDINGS IN VIEW OF THE INDOOR AIR QUALITY – CASE STUDY FOR POLISH DWELLING

Monika BLASZCZOK/ Andrzej BARANOWSKI

Abstract The widespread thermal improvement in residential buildings involves not only the insulation of outdoor walls but also window replacement. In Poland it is the residents of individual premises who manage the replacement and in order to keep their heating bills low, they seek airtight solutions to minimize the cooling of premises due to air infiltration. In this situation the indoor air quality is not considered at all and no exchange of used air and fresh air occurs. Unawareness on the p(..)

DOI: 10.21307/ACEE-2018-044

Published Online: 04-April-2019

IMPACT OF THE UV LAMP POWER ON THE FORMATION OF SWIMMING POOL WATER TREATMENT BY-PRODUCTS

Edyta KUDLEK/ Anna LEMPART/ Mariusz DUDZIAK/ Marta BUJAK

Abstract The operation of swimming pools requires a constant monitoring of water quality parameters and protection of water against pathogens. This is implemented by various disinfection methods, among which the most commonly used are based on chlorine action supported by ozone or UV irradiation. The paper presents the comparison of the effectives of organic micropollutants decomposition occurring in swimming pool water during UV irradiation emitted by a 15 and 150 W UV lamp. The tests were cond(..)

DOI: 10.21307/ACEE-2018-045

Published Online: 04-April-2019

THE SOURCE OF TOXICITY OF BACKWASH WATER FROM A SWIMMING POOL FILTER BED WASHINGS

Anna LEMPART/ Edyta KUDLEK/ Mariusz DUDZIAK/ Aleksandra ZAWADZKA

Abstract The necessity of reducing the operating costs of swimming pools leads to attempts to reuse of backwash water from washing swimming pool filter beds. Their use for watering plants, sprinkling tennis courts and play fields, draining to nearby watercourses or even returning to swimming pool installations is taken into consideration. Current researches proved the toxicity of these waste streams. The results of these studies raise doubts about the rightness of the attempts to introduce washi(..)

DOI: 10.21307/ACEE-2018-046

Published Online: 04-April-2019

DEVELOPMENT OF DAPHNIA MAGNA UNDER EXPOSURE TO AMPICILLIN

Thi-My-Chi VO/ Ngoc-Han PHAM/ Tan-Duc NGUYEN/ Manh-Ha BUI/ Thanh-Son DAO

Abstract In this study, the chronic effects of Ampicillin on survival, reproduction and growth of Daphnia magna was monitored during 21 days exposure test. The results showed that Ampicillin strongly affected on life history traits of Daphnia magna, i.e. 47% reduction of survival proportion, lower 68% reproduction than the control, and reduction in body length and in the intrinsic population rate, especially at its highest concentration. The antibiotics especially Ampicillin should be included i(..)

DOI: 10.21307/ACEE-2018-047

Published Online: 04-April-2019

COAGULANT COST OPTIMIZATION FOR SURFACE WATER COAGULATION PROCESS

Małgorzata WOLSKA/ Marek MOŁCZAN/ Anna SOLIPIWKO-PIEŚCIK/ Halina URBAŃSKA-KOZŁOWSKA

Abstract This paper presents the results of a study concerning application of different coagulants used in surface water coagulation process. Even though the use of this process is quite wide-spread and several different coagulants are used it would be vital to identify which coagulants are the most effective from the economical point of view. The choice of parameter, such as doses, contact time, speed of mixing are important for cost optimization while maintaining satisfactory results for WTP. (..)

DOI: 10.21307/ACEE-2018-048

Published Online: 04-April-2019

THE REUSE OF WASHINGS FROM POOL FILTRATION PLANTS AFTER THE USE OF SIMPLE PURIFICATION PROCESSES

Joanna WYCZARSKA-KOKOT/ Anna LEMPART

Abstract The main purpose of the research is to show the possibility of using washings after applying simple processes and devices. It is being considered whether they may be drained to watercourses, to the ground, used for watering plants, sprinkling tennis courts and playing fields, flushing toilets or recycled into pool systems. The research concept consisted of comparing the results of physico-chemical analysis of washings samples with the limit values for pollutants in wastewater discharged(..)

DOI: 10.21307/ACEE-2018-049

Published Online: 04-April-2019