Cement Wapno Beton最新文献_第4页

Properties of cement with the low Portland clinker and the different content of silica fly ash as well as granulated blast furnace slag 研究了低硅酸盐熟料与不同掺量的二氧化硅粉煤灰和高炉矿渣的水泥性能

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.4.5

M. Wieczorek, P. Pichniarczyk

引用次数: 0

Effect of selected organic additives on the properties of magnesia-chromite refractories 有机添加剂对镁铬铁矿耐火材料性能的影响

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.4.2

J. Wojsa, W. Zelik, Sebastian Sado, R. Świerszcz

引用次数: 0

Current situation and further development of AAC in Europe 欧洲AAC的现状及进一步发展

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.3.1

Robert Turski, W. Rogala

引用次数: 0

Influence of the aggregate type on delayed ettringite formation 集料类型对延迟钙矾石形成的影响

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.2.5

Z. Owsiak

引用次数: 0

Features of non-destructive testing of existing masonry structures made of autoclaved aerated concrete units 既有蒸压加气混凝土砌体结构无损检测特点

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.3.3

R. Jasiński, Ł. Drobiec, W. Mazur

引用次数: 0

Formation of geopolymeric materials properties depending on the molar modules of SiO2/Al2O3 and SiO2/Na2O SiO2/Al2O3和SiO2/Na2O的摩尔模对地聚合物材料性质的影响

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.2.3

Szymon Sikora, Karol Skowera, Mariusz Hynowski, Z. Rusin

{"title":"Formation of geopolymeric materials properties depending on the molar modules of SiO2/Al2O3 and SiO2/Na2O","authors":"Szymon Sikora, Karol Skowera, Mariusz Hynowski, Z. Rusin","doi":"10.32047/cwb.2022.27.2.3","DOIUrl":"https://doi.org/10.32047/cwb.2022.27.2.3","url":null,"abstract":"The construction sector is responsible for around 37% of global emissions of the carbon dioxide to the atmosphere. Therefore, reducing gas emissions, in this construction sector, is particularly important ,given the progressing climate change. For this reason, limiting its emissions and limiting the emission of other greenhouse gases in this sector, is of particular importance in view of the progress of climate change. It is important that new construction products have less impact on the environment during their entire life cycle, and their production has been decoupled from the use of primary energy. In this work, selected properties of geopolymeric materials were examined. Geopolymers are inorganic aluminosilicate polymers with an amorphous microstructure, which may be an alternative in certain applications, for products based on Portland cement. Here, the properties of geopolymer mortars, i.e. porosity, microstructure and mechanical strength, were compared. The influence of the composition of reaction mixture on these properties, defined by the appropriate SiO2/Al2O3 and SiO2/Na2O molar ratios, was also defined. The results show that increasing the content of SiO2 in relation to Al2O3 in the composition of the reaction mixture, reduces porosity. Thus, leading to a more compact microstructure and higher mechanical strength. A similar effect occurs when a higher NaOH solution concentration is used, in comparison to the sodium silicate [Na2SiO3] solution.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"16 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81314831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Experimental investigation on influence of hybrid fibers in flexural behavior of reinforced concrete beams 混杂纤维对钢筋混凝土梁受弯性能影响的试验研究

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.1.5

R. Shanthi Vengadeshwari, H. J. Jagannatha Reddy, R. Prabhakara

{"title":"Experimental investigation on influence of hybrid fibers in flexural behavior of reinforced concrete beams","authors":"R. Shanthi Vengadeshwari, H. J. Jagannatha Reddy, R. Prabhakara","doi":"10.32047/cwb.2022.27.1.5","DOIUrl":"https://doi.org/10.32047/cwb.2022.27.1.5","url":null,"abstract":"Addition of fiber is a promising solution, to enhance the flexural behaviour of reinforced cement concrete [RCC] beams. It improves the peak load, ductility and energy absorption characteristics of RCC. Ineffective mono fibers in the concrete perform very effective, when combined through the hybridization and contribute towards the strength. Fiber hybridization offers appreciable improvement in fresh and hardened properties of concrete. To achieve optimum performance, synergetic effect of fibers is more important. Incorporation of two fibers in concrete matrix, bridges the cracks effectively. Hence to investigate the effect fiber hybridization in the flexural performance, RCC beams were cast, experimented and the results were compared with the control beams. In the present study, it is intended to evaluate and compare the impact of steel and basalt fibers in mono form and hybrid form, on the flexural parameters such as first crack load, load response behaviour, ductility, crack width and flexural strength of RCC beams. To evaluate the mechanical properties of M40 grade fiber reinforced concrete, volume fractions chosen were 0.25%, 0.5% and 0.75%. Comparatively addition of basalt fibers with steel fibers, improves synergetic response to a considerable extent. From overall assessment of the mechanical properties, it was established that the combination of basalt and steel fibers at 0.25% and 0.75% respectively, produced optimum results. Optimum volume fraction of fibers identified is used in the casting of RCC beams. Wherever possible, flexural parameters were cross checked, with Indian Standards.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"36 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83809412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The infl uence of cement on the environmental performance of construction products on the example of cementitious adhesives – External Thermal Insulation Composite Systems [ETICS] components 水泥对建筑产品环境性能的影响，以水泥胶粘剂-外保温复合系统[ETICS]组件为例

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.1.2

Sebastian Czernik, Bartosz Michałowski, J. Tomaszewska, J. Michalak

{"title":"The infl uence of cement on the environmental performance of construction products on the example of cementitious adhesives – External Thermal Insulation Composite Systems [ETICS] components","authors":"Sebastian Czernik, Bartosz Michałowski, J. Tomaszewska, J. Michalak","doi":"10.32047/cwb.2022.27.1.2","DOIUrl":"https://doi.org/10.32047/cwb.2022.27.1.2","url":null,"abstract":"The construction sector is one of the branches of the economy with a significant impact on the environment. It uses a vast amount of different raw materials. Also, it produces substantial amounts of waste and emits high amounts of greenhouse gases into the atmosphere. Reducing the energy consumption and emissivity of buildings, decarbonizing existing energy sources, optimizing the use of renewable energy, and minimizing the carbon footprint of materials and construction works are imperative to counteract climate change. It is also a minimum plan for ensuring sustainable social development. The current environmental policy in the construction sector is insufficient and it results from the legal regulations currently in force. Assessment of construction products for the seventh basic requirement, sustainable use of natural resources, is voluntary and almost always neglected. Assessment tools, such as Type III Environmental Product Declarations [EPDs] for construction products, are not widely used. Moreover, these documents are poorly recognizable among consumers, proving that there is still insufficient environmental awareness. In addition, the emerging differences in environmental impact indicators values specified in environmental declarations, resulting from using differentiated approaches in setting system boundaries or the quality of available generic data, do not support the proper development of knowledge about the impact of construction products on the environment. In this work, an analysis of the environmental impact of cement, which is a component of adhesives used in the External Thermal Insulation Composite System [ETICS], was carried out. The study on four indicators, i.e., global warming potential [GWP], soil and water acidification potential [AP], eutrophication potential [EP], and tropospheric ozone formation potential [POCP], was performed.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"8 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80836719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmentally friendly material solutions in the technology of autoclaved aerated concrete 蒸压加气混凝土技术中的环保材料解决方案

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.3.2

W. Pichór

引用次数: 1

Importance of zinc in Portland cement production 锌在硅酸盐水泥生产中的重要性

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2022-01-01 DOI: 10.32047/cwb.2022.27.1.4

W. Kurdowski, Paweł Zajd

引用次数: 0