bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Granular Silica Aerogel as Filler on Tensile and Flexural Strengths and Moduli of Stone-Wool-Fibre-Reinforced Composite as Rigid Board Roof Insulation Material
Authors: Husna Nadzhratul , Farhan Syed Ahmad , Wahab Mohamed Mubarak Abdul , Wahab Mohamed Mubarak Abdul , Shafiq Nasir , Sharif Muhammad Taufiq , Razak Siti Nooriza Abd , Ismail Ismail Fouad 
Published: December 2021

Abstract
Installation of stone wool as thermal insulation in the roof assembly can be adopted to store heat in the living space, if the building is exposed to cold weather, and, inversely, to retard heat from entering the living space, if it is exposed to hot weather. In spite of the effectiveness of stone wool as a roof insulation material, during installation, it can cause irritation to the skin and can be hazardous to the lungs. Therefore, incorporation of stone wool with other materials to form a rigid board, without compromising its effectiveness as a roof insulation material, is imperative. Strength properties of a stone-wool-fibre-reinforced high-density polyethylene (HDPE) composite roof insulation material were studied. Granular silica aerogel, which possesses an ultra-low thermal conductivity, was added as filler to reduce the thermal conductivity of the composite. Hot compression moulding was performed to prepare samples of the composite with varying silica aerogel content of 0, 1, 2, 3, 4, and 5 wt. %. Findings suggest that 2 wt.% is the optimum silica aerogel content as it resulted in the highest flexural strength and modulus, which is 24.4 MPa and 845.85 MPa, respectively, even though it reduced the tensile strength and modulus by 10% and 4.45% respectively, relative to 0 wt. %, which can be considered as inconsequential. Higher silica aerogel content above 2 wt. % may result in poor interfacial adhesion and low compatibility to the stone wool fibre and HDPE, which further reduces the tensile and flexural strengths and moduli of the composite.
Property Correlations of Polypropylene based Composites Filled with Mimusop elengi Seed Shell Powder
Authors: Chien Tan Wuan , Muniyadi Mathialagan , Munusamy Yamuna 
Published: December 2021

Abstract
The saturation point of Mimusop elengi seed shell powder (MESSP) and the effect of MESSP addition on the mechanical, thermal, water absorption and morphological properties of polypropylene (PP) composites were studied. Tensile fracture, physio-mechanical properties and thermal behavior of composites were characterized using tensile and impact testing, thermogravimetric analysis, scanning electron micrograph, and differential scanning calorimetry. Processability of composites were feasible up to 20 wt. % MESSP by which agglomeration of MESSP and poor dispersion of MESSP in PP was observed above 20 wt% MESSP loading. Increasing MESSP loading showed tremendous improvement in tensile modulus and impact strength, whereas tensile strength and elongation at break were reduced. Water absorption and thermal decomposition of composites remain comparable with addition of MESSP up to 20 wt. %. Reduction of tensile strength was attributed by weak adhesion between MESSP and PP. However, morphological analysis revealed the presence of physical interaction via PP chain interlocking on MESSP surface.
The Preliminary Study for Effect of Plant Extract on Concentration of Heavy Metals in Soil
Authors: Lee Li Na , Guo Xinxin , Lim Jinq Shiou , Wong Rou Hui , Ng Choon Aun , Bashir Mohammed JK , Lee Lim Fang 
Published: December 2021

Abstract
Heavy metal contamination in soils had arisen into a more prominent problem as a result of increasing anthropogenic activities like manufacturing, mining, excessive application of agricultural chemicals and inappropriate disposal of wastes. Researchers across the globe had been striving to discover and develop methods to restore the soil back to its original condition with an assortment of remediation techniques that varies from treatment mechanism for various soil and contamination condition. Majority of the existing techniques have drawbacks like high energy consumption, specificity on the site condition, limitations on applicable contaminants, side effects after treatment, and also being uneconomical. More and more researchers are beginning to divert their attention into using organic stabilizers for treatment of soil heavy metal contamination in recent years after learning about its potential after numerous research showed promising reduction on the bioavailability and mobility of heavy metals. Due the lack of study on liquid-form organic stabilizers, the authors dedicated this research into implementing plant extract (TM) in the immobilization of heavy metals in soil. For comparison purpose, sodium alginate (SA), a proven organic stabilizer had been incorporated into the experiment to evaluate the performance of plant extract to immobilize cadmium (Cd), chromium (Cr), and manganese (Mn) from the metal-spiked soil samples in this research. The study findings suggested that the SA increased the unstable fractions, namely the exchangeable and carbonate fractions, of Cd relative to the untreated soil sample by 10.3 % to 5.2. On the other hand, the TM yields a result of 0.1 % to 1.1 % reduction of the unstable Cd. For the unstable Cr, both SA and TM decreased the concentration levels in the soil by 2.5 % to 8.0 % and 6.1 % to 7.9 % respectively. The results for Mn showed that the SA is able to decrease the concentration of its unstable fractions by 2.0 % to 7.5 % while the TM increases the concentration by 11.7 % to 1.5 %. In general, lower concentration of heavy metals in the unstable fractions was detected as the dosage of soil stabilizers applied increases. The application of soil stabilizers at 10 % weight percentage yields the lowest reading of unstable heavy metals in comparison with samples with lower dosage.
Fish Farm Wastewater Treatment using Moringa oleifera Seed Powder as Natural Coagulant
Authors: Tong Cheah Yi , Yusuf Fakhira Huda Binti Che , Derek CJC 
Published: December 2021

Abstract
In view of the huge amount of wastewater being generated from the aquaculture sector in Malaysia, Moringa oleifera seed powder was utilized as effective bio-coagulant to minimize the deterioration of fish farm wastewater quality. In this study, optimization of a coagulation-flocculation process was examined through response surface model toolkit established on a central composite design. A quadratic polynomial model was eventually selected to fit its turbidity removal response. The effect of four crucial parameters, namely pH, coagulant dosage, mixing time and settling time was optimized at pH 10, 400 mg/L coagulant dosage, 15 minutes mixing time and 10 minutes settling time for M. oleifera seed extract at a 47.11% turbidity removal efficiency. M. oleifera seed powder substantially removed (>30%) the concentration of total suspended solids, ammonia content, total volatile solids, and phosphate content as compared with the control group without any coagulant addition.
Floating Structure with Stabilised Buoyancy Control Device for Photovoltaic Application
Authors: Tan Chee Sean , Tan Lai Wai , Tan Chee Wayne 
Published: December 2021

Abstract
Conventional approach of energy derivation is causing anthropogenic pollution and climate change. Various sustainable alternatives of renewable energy particularly solar energy have been developed and implemented as a part of the global effort to gradually decommission usage of fossil fuel and in turn, reduce carbon footprint to overcome adverse environmental impacts. Nevertheless, it was reported that in 2019, only 0.85% of total energy used globally is powered by solar energy. Photovoltaic by itself is not feasible enough due to magnified requirement of land for its installation. Therefore, one of the solutions is floating photovoltaic. However, floating photovoltaic is also restraint by the impact of tidal wave. Characterisation of relationship between stability of large floating structures corresponding to volumetric displacement of the buoyancy control device is the focal point of this paper. Significance of tidal wave impact is empirically assessed based on a scaled-down model of buoyancy control device integrated large floating structure by manipulating the buoyancy of buoyancy control device assisted structure to structure without buoyancy control device under a controlled environment. Fluctuation of the buoyancy control device can be reduced by up to 99.65% when tested against highest configuration of wave transducer by displacing only 50% of air with water. Meanwhile, neutral buoyancy is achieved up to almost 100% when the buoyancy control device is completely filled with water and total submergence has been achieved.
Upgrading the fermentability and prebiotic potential of palm decanter cake through fibre-degrading enzymatic treatments
Authors: Teh Xiao Wen , Chang Ying Ping , Lee Kok Chang 
Published: December 2021

Abstract
Palm oil milling has produced tonnes of solid waste including palm decanter cake (PDC). The recalcitrant nature of PDC limits its full inclusion in animal feed. This study aims to investigate the effect of fibre-degrading enzyme such as cellulase and xylanase on the prebiotic activity and solid state fermentability of PDC. We used the following commercial enzyme loading: 5U cellulase (5UC), 5U xylanase (5UX) and combined enzymatic treatment 2.5U:2.5U (C25U) per gram of substrate to hydrolyse the defatted PDC. The sugar profile in the effluent was analysed by using high-performance liquid chromatography, and the degree of hydrolysis (DH) was estimated based on the total carbohydrates amount in the effluent. The DH of enzymatic-hydrolysed PDC followed the order of 5UC< C25U <5UX, which was 7.8 %, 44.2 2% and 46.27 %, respectively. The prebiotic activity score of ethanolic extract obtained from the PDC followed the order of untreated < C25U < 5UX < 5UC, which were -1.04, -0.74, -0.10 and 0.58, respectively. To further investigate the role of lignin (which can be eliminated through alkaline hydrogen peroxide treatment (AHPT) on the extent of hydrolysis and the fermentability of enzymatic-hydrolysed PDC, we tested the invasion capacity of fungus Aspergillus oryzae on untreated, and AHPT followed by enzymatic-treated PDC. Pre-treatment of PDC with AHP improved accessibility for enzymatic hydrolysis in which the highest fungus growth rate was observed on the AHP-C25U PDC. Enzymatic treatment succeeding AHPT is a feasible way to improve the fermentability of palm decanter cake.
Thermophysical parameters of the Kežmarok sandstone
Authors: Jaroš P , Vertal M 
Published: December 2021

Abstract
Thermophysical parameters of building materials are required for calculating the complex heat and water transfer in building structures. It can be performed by modern simulation software such as Wufi, Delphin, Math, Comsol Multiphysics and other. This software is suitable for evaluation of water and heat transport in construction of historical buildings, because it can include the impact of water on material properties, driven rain, ground water, heat and water accumulation and other. The material properties of historical building materials are required for the use of this software. In Slovakia, the most used building material was sandstone. Sandstone from Kežmarok was chosen for this paper, which was used in the construction of historic buildings such as churches and town houses. The method of dynamic impulse transition by thermophysical tester RTB was used to determine the thermal properties of sandstone.
Reverberation measurement set for the interrupted noise method
Authors: Jun D , Nespěšný O 
Published: December 2021

Abstract
This paper describes the methodology of measuring the sound absorption coefficient in a reverberation room. For its purpose, a measuring set was created combining professional with widely available hardware suitable for acoustic reverberation measurements. For the measurement itself, the interrupted noise method was chosen based on the standard ČSN EN ISO 354. Measurement and evaluation of data take place using scripts written in the Python programming language. An effective measuring set was developed both in terms of operation during measurement and in terms of subsequent data processing, accessing and graphical presentation.
Advanced building materials - prefabricated and modular designs as part of Construction 4.0 with a focus on transport constructions
Authors: Krupík P 
Published: December 2021

Abstract
Digital and technological innovations that have grown rapidly in recent years have been referred to as the 4th Industrial Revolution or Industry 4.0. The paper comprehensively deals with the description of the Advanced building materials, Prefabricated and modular designs as part of Construction 4.0 with a focus on transport construction. The aim of the article is description of this issue comprehensively and with the help of SWOT analysis identify weaknesses, strengths, opportunities and threats with focus on the transport constructions. The content is complemented by an assessment of the current situation, indicating the possibility of use in practice.
Analysis of time consumption for extensive green roof realization
Authors: Hejl M , Mohapl M , Jílek J 
Published: December 2021

Abstract
The article deals with the analysis of time consumption for the construction of an extensive green roof. Also, it deals with the construction of several extensive roofs in terms of time and then sets a new standard hour for the construction of an extensive green roof. At the end of the article, it is said how it would be possible to speed up the construction of extensive roofs or in some cases simplify it.
Alternatives how to mitigate urban flooding and CSO in urbanized areas used in European cities and towns
Authors: Csóka M , Rózsa G , Marko I , Stanko Š 
Published: December 2021

Abstract
Urban flooding and combined sewer overflow in city, or town areas represents potential risk in environmental, economic, or social aspects. The goal of this study is to process and evaluate efficiency of individual solutions to reduce occurrence of flooding in urban areas caused by intense rainfall events. The known conventional solutions are stormwater chambers, or storage drains. The new trend in reduction of stormwater drainage into combined sewer system are parts of blue-green infrastructure. Blue-green infrastructure represents environmental urban infrastructure which consists of sensitively selected urban vegetation combined with ingenious hydrological elements of urban city drainage. The study also deals with experimental usage of decentralized real time control, based on a gossip-based algorithm of moveable gates in sewage network. Experiment was proposed for drainage system of the city of Cosenza in Italy. Evaluation will assess application value of individual proposed solutions for the reduction of combined sewer overflow for Slovak republic and its urban cities, or towns.
Analysis of CO2 emissions in municipality Most pri Bratislave
Authors: Garaj M , Zeleňaková M 
Published: December 2021

Abstract
The most discussed topics in the 21st century at the global level are climate change, carbon neutrality, digitization and globalization. They have impact on the lives of all people, the quality of the environment in which we live, the health of the whole population, the development of cities and urban areas, the development and direction of industry and its new technologies, and last but not least, they shape humanity to which they are giving direction. To meet our 2030 goals, we need to know where we are now from carbon footprint point of view and where CO2 production comes from around us.
Combined sewer overflow chamber analysis based on CFD modelling.
Authors: Hrudka J , Šutúš M , Csóka M , Raczková A , Škultétyová I 
Published: December 2021

Abstract
The paper deals with CFD simulation of a real combined sewer overflow chamber using Ansys fluent software. Simulations are created for various structural modifications. Within the results, the hydraulic parameters of the individual are evaluated with a proposal for optimal operation of the given relief chamber.
Single-step and double-step heath recuperation of waste water from thermal baths
Authors: Predajnianska A , Takacs J 
Published: December 2021

Abstract
Thermal baths in Slovakia are producers of wastewater, which hides considerable energy potential. The wastewater from the thermal pools has often exceeds the maximum permissible value of the temperature of the wastewater discharged into the water recipient. As a result, there is undesirable damage to the environment, which results in sanctions for the operators of these facilities. Our aim is to present the concept of a single- and double-step heat recuperation system of waste pool water using applications of various types of heat exchangers or heat pumps. The aim of this application is to ensure a suitable temperature to the discharged waste pool water, efficient use of the energy potential of the waste water and saving of primary energy in the form of geothermal water, thus extending the life of the entire system.
Development of the level of sorting of municipal waste in the selected locality
Authors: Rózsa G , Wittmanová R , Hrudka J , Škultétyová I 
Published: December 2021

Abstract
Waste management is one of the essential areas that everyone in the world should carry about. Waste collection and treatment help to reduce the risk of the spread of various diseases. Municipal waste is waste produced in households by the population. Municipal waste can be sorted into other components, such as plastic, paper, glass, metals, and biodegradable waste. These types of waste are in most urbanized areas collected separately. The sorting level offers accurate information about each urbanization, to what extent its population is involved in separated waste collection. The paper focuses on analyzing the waste collection system in the selected locality and will examine the local waste sorting level development during the last few years.
Development of design rainfalls: A review
Authors: Wittmanová R , Marko I , Šutúš M , Stanko Š 
Published: December 2021

Abstract
Design rainfalls are essential parameters in designing and assessing combined and stormwater sewers and are still used today. They create idealized intensity profiles with statistically determined parameters. Their gradual development is based on the development of computer technology, measuring instruments, and measurement campaigns’ progress. However, climate change is causing changes in precipitation events’ characteristics, so it is important to focus on reassessing them and adapting to current conditions. The paper summarizes the knowledge about the development of design rains to reveal their potential for the future.
Silicate conductive composites with graphite-based fillers
Authors: Baránek Š , Černý V , Yakovlev G , Drochytka R 
Published: December 2021

Abstract
Electroconductive composites are modern materials that are commonly used in many industries such as construction industry and machine-building industry. For example, these materials can be useful as sensors for monitoring changes in constructions, shielding stray currents from electrification networks, shielding electromagnetic radiation in operating rooms, cathodic protection against moisture or overvoltage protection of buildings. The topic of this post is the research of electrically conductive silicate composites with graphite-based fillers. In this research will be tested composites with different ratio and types of graphite and monitor their electroconductive properties like impedance, and physical-mechanical properties like compressive and tensile strength. The post describes basic properties and interactions of silicate electrically conductive composites with graphite fillers. It was found that by adding 10 % wt. graphite into silicate composites, impedance is reduced by 50% and compressive strength by 40%. The flexural tensile strength depends mainly on the roughness of the particles, where the coarser flaky particles transfer the load better and increase the strength while very fine graphites reduce the flexural tensile strength. Furthermore, it has been found that very finely ground synthetic graphites are most suitable for achieving low impedance of composites.
Impact of dampness to changes in the mechanical properties of solid fired bricks
Authors: Bartoň V , Šnédar J , Cikrle P 
Published: December 2021

Abstract
This work deals with the monitoring of changes in the mechanical properties of solid fired bricks depending on their dampness using non-destructive methods. Decreases of first natural frequencies by the resonance method and increase of passage times of ultrasonic waves depending on increasing dampness are monitored. The elements were firstly fully saturated and then slowly dried so that it was possible to record the values of the first natural frequencies and the passage times of the ultrasonic waves at different dampness. It is not possible to record values in all dampness, so the measured values were interpolated by regression models. A polynomial of the 2nd degree seems to be the most suitable. Dampness corresponding to the minimum natural frequencies and the maximum passage times of the ultrasonic waves were performed on these regression models. This research is the first step in determining the durability criteria for ceramic products, especially solid fired bricks. In the future, durability criteria should help in the reconstruction of historic buildings to assess whether the element that will be exposed to the weather is durable or not. These tests are completely non-destructive, which means that the tested element can be subsequently used in construction.
Study of polymer-based adhesive mortar with higher durability
Authors: Hermann R , Figala P , Mészárosová L , Drochytka R 
Published: December 2021

Abstract
This paper deals with the study and development of polymer-based adhesive with high filling ratio of secondary raw materials and waste materials. The goal of this paper is to develop adhesive mortar with the highest filling rate of secondary raw materials and waste materials as possible while preserving very high physical-mechanical properties, including flexural and compressive strength, pull-off bond strength and abrasion resistance. High-temperature fly ash, waste slag and waste packaging glass are used in this paper as fillers. The resulting mortar shows high physical-mechanical properties, including high abrasive resistance and very high bonding strength to a large variety of building materials including concrete, steel, glass, and tiles.
Overview of the presence of predominant microorganisms on the interface of cementitious materials and soil from selected locations
Authors: Hološová M , Eštoková A , Luptáková A 
Published: December 2021

Abstract
The presented work focuses on the predominant microorganisms on the interface of cementitious materials and soils from different localities. Soils contain microorganisms that can affect the underground concrete structure positively or negatively. Different types of microorganisms are adapted to the environmental conditions depending on the quality and quantity of elements in the soil. Methodology of the work was based on screening 5 selected localities in the Košice city from which soil was taken in the nearness and in the contact with the concrete structure. These samples were further analysed. In this paper the presence of bacteria in the soil around the construction is confirmed.