Cement Wapno Beton最新文献_第10页

Investigations on the resistivity of XD3 reinforced concrete for chloride ions and corrosion with calcium nitrate inhibitor and superplasticizers 硝酸钙缓蚀剂和高效减水剂对XD3钢筋混凝土氯离子电阻率及腐蚀性能的研究

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.4.7

Shaymaa Abbas Abdulsada, T. Török

{"title":"Investigations on the resistivity of XD3 reinforced concrete for chloride ions and corrosion with calcium nitrate inhibitor and superplasticizers","authors":"Shaymaa Abbas Abdulsada, T. Török","doi":"10.32047/cwb.2020.25.4.7","DOIUrl":"https://doi.org/10.32047/cwb.2020.25.4.7","url":null,"abstract":"This work presents a study of the total chloride contents in concrete and the corrosion process by testing electrical resistivity and half-cell potential of concrete samples. The analysis was based on an experimental investigation of the samples with the time of immersion in 3.5% mass NaCl aqueous solution at room temperature for 18 months, according to European Standards. For this study, different mixtures of concrete were prepared by adding two types of superplasticizers and calcium nitrate inhibitor, in different concentrations. The results of the Cl- ions test showed that all the samples, after an immersion testing period of six months, contained high concentrations of Cl- ions. Samples C4 with 3% calcium nitrate inhibitor and Oxydtron superplasticizer as well as C3 with 3% calcium nitrate inhibitor and Mapei Dynamon SR 31 superplasticizer, showed good resistance to corrosion, in the tested environment. It was also proved by the results of several sets of measurements of the electrical resistivity and half-cell potentials carried on the concrete test samples, to the end of the 18 months testing period.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"76 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90991936","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

Performance of multicomponent Portland cements containing granulated blast furnace slag, zeolite, and limestone 含有粒状高炉矿渣、沸石和石灰石的多组分硅酸盐水泥的性能

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.5.7

M. Sanytsky, Aleksander Usherov-Marshak, T. Kropyvnytska, Iryna Heviuk

引用次数: 8

Rotary kilns in current cement industry 回转窑在当前水泥工业中的应用

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.2.5

W. Kurdowski, Ernest Jelito

引用次数: 1

The proposition of implementing the lean construction concept based on normalized quality management systems in the organizations operating in the construction industry 提出在建筑行业组织中实施以规范化质量管理体系为基础的精益施工理念

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.4.1

M. Bugdol, B. Goranczewski, Grzegorz Kądzielawski, Grzegorz Pakuła

{"title":"The proposition of implementing the lean construction concept based on normalized quality management systems in the organizations operating in the construction industry","authors":"M. Bugdol, B. Goranczewski, Grzegorz Kądzielawski, Grzegorz Pakuła","doi":"10.32047/cwb.2020.25.4.1","DOIUrl":"https://doi.org/10.32047/cwb.2020.25.4.1","url":null,"abstract":"The paper discusses the results of research on the maturity of the quality management system, implemented in selected organizations operating in the construction industry in terms of the possibility of introducing the concept of lean construction. Multiple studies have indicated the potential benefits which organizations may gain by applying lean principles, e.g. decreased costs, reduced construction time, and wastefulness. The aim of this paper is to develop a proposition – main tasks, of implementing the lean construction concept based on normalized quality management systems, in organizations operating in the construction industry. The research was carried out using documentation analysis, interviews, and a self-assessment method, consistent with ISO 9004. Its results confirm earlier findings e.g. (1, 2), according to which quality management systems may serve as the foundation for implementation of lean construction. However, it is vital to take the specific nature of the construction business into account, especially the fact that the construction works are connected with particular sources of wastefulness (3).","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"184 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77305439","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

Properties of self-compacting concrete containing olive waste ash 橄榄废灰自密实混凝土的性能研究

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/CWB.2020.25.3.2

R. Cheraghalizadeh, T. Akçaoğlu

引用次数: 1

Mechanical properties and microstructure of cement multicomponent systems containing pozzolan materials under sulfate attack 硫酸盐侵蚀下含火山灰水泥多组分体系的力学性能和微观结构

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.2.6

Selahattin Güzelküçük, I. Demir, Özer Sevim, I. Kalkan

{"title":"Mechanical properties and microstructure of cement multicomponent systems containing pozzolan materials under sulfate attack","authors":"Selahattin Güzelküçük, I. Demir, Özer Sevim, I. Kalkan","doi":"10.32047/cwb.2020.25.2.6","DOIUrl":"https://doi.org/10.32047/cwb.2020.25.2.6","url":null,"abstract":"Sulfates are a significant chemical components that may lead to failures of cement concrete composites. The present study is dedicated to analyzing the effects of sulfate on the microstructure of cement composite mortars. For this purpose, cementing composite specimens were prepared with 20% pozzolan mixture [fly ash + granulated blastfurnace slag + bottom ash] by mass of cement, together with the reference additive-free specimen of cement concrete, without any mineral admixtures. These cementing composite mortar specimens were then treated for 2, 7, 28, 90, and 360 days in tap water and 10% sodium sulfate solution. The microstructure of the additive-free mortar and composite cement mortar, partially replaced with 20% pozzolan, was then investigated using a scanning electron microscope. The results showed that increasing curing time also increases the formation of C-S-H [calcium silicate hydrate] gel in the cement mortar, when the microstructural changes in the cement are explored in detail. Ettringite formation [3CaO·Al2O3·3CaSO4·32H2O] in the specimens cured in 10% Na2SO4 was also noticed, in the present experiments.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"7 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74877349","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: 4

Assessment of the scope of activities for sustainable development in the cement industry in Poland with the use of multi-dimensional comparative analysis 利用多维比较分析评估波兰水泥工业可持续发展活动的范围

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.1.4

J. Łapińska, Iwona Escher, Grzegorz Kądzielawski, P. Brzustewicz

引用次数: 0

Mechanical properties of engineered cementitious composites developed with silica fume 用硅灰开发的工程胶凝复合材料的力学性能

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.4.3

N. Arivusudar, S. Suresh Babu

{"title":"Mechanical properties of engineered cementitious composites developed with silica fume","authors":"N. Arivusudar, S. Suresh Babu","doi":"10.32047/cwb.2020.25.4.3","DOIUrl":"https://doi.org/10.32047/cwb.2020.25.4.3","url":null,"abstract":"Engineered Cementitious Composites are generally the ultra-high—performance fiber-reinforced composites, which have very good mechanical properties. Engineered Cementitious Composites are similar to normal conventional concrete with cement, fi ne sand, fly ash, but without coarse aggregate. Engineered Cementitious Composites have a high content of cement, which is causing this material to be far from the sustainability. The mechanical and durability properties of Engineered Cementitious Composites can be improved by the addition of fly ash. The properties of Engineered Cementitious Composites can be also improved by the partial replacement of cement by fly ash, up to 40%. In this study, an attempt is made to straighten the Engineered Cementitious Composites by the addition of silica fume, leaving the content of fly ash without changes. Eight different mix proportions are used in this investigation, which includes one conventional mix and mixes with the addition of 10% to 70% of silica fume with the distance of 10%. The addition of silica fume to Engineered Cementitious Composites is causing the remarkable improvement of the mechanical properties of these mixes.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"77 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89830716","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

Influence of mineral additives on the packing density of ternary mix 矿物添加剂对三元混合料充填密度的影响

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.2.7

Akanksha Pathania, Abhilash Shukla, Rajneesh Vashisht

引用次数: 2

Stabilization of the swelling soil for earth construction 土工施工中膨胀土的稳定

IF 0.7 4区工程技术

Cement Wapno Beton Pub Date : 2020-01-01 DOI: 10.32047/cwb.2020.25.3.4

Hanna Y. Ghorab, H. Hassan, Hosam El D.H. Ahmed

引用次数: 1