Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.5.2
Michał Banaszek
Although the application of concrete in the visual arts is not as wide as in the construction industry, it reflects diverse artistic attitudes and expectations regarding this material. We come across its use mostly in public space, being a natural space for concrete. When it comes to small-scale sculptures exhibited in art galleries, concrete is not found that often. Sculpture is a vastfield dominated from one hand by traditional materials such as bronze, stone, ceramics, but also open to spatial and material experiments. The articles presents a number of concrete use cases in the creative way: its method, the output, and the conclusions. The aim of the project was to depart from the typical architectural function of concrete and to present it as the flexible one that enables one to take advantage of its expressive features. As a result, a set of works called “The Silence of Forms” was created, which was fully or partially presented in some art exhibitions in the years 2019-2021.
{"title":"“The Silence of Forms” – liberated concrete matter in a sculpture","authors":"Michał Banaszek","doi":"10.32047/cwb.2021.26.5.2","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.5.2","url":null,"abstract":"Although the application of concrete in the visual arts is not as wide as in the construction industry, it reflects diverse artistic attitudes and expectations regarding this material. We come across its use mostly in public space, being a natural space for concrete. When it comes to small-scale sculptures exhibited in art galleries, concrete is not found that often. Sculpture is a vastfield dominated from one hand by traditional materials such as bronze, stone, ceramics, but also open to spatial and material experiments. The articles presents a number of concrete use cases in the creative way: its method, the output, and the conclusions. The aim of the project was to depart from the typical architectural function of concrete and to present it as the flexible one that enables one to take advantage of its expressive features. As a result, a set of works called “The Silence of Forms” was created, which was fully or partially presented in some art exhibitions in the years 2019-2021.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"26 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83265663","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.4.4
Reza Farokhzad, A. Dadashi, A. Sohrabi
This study aims to investigate the linear attenuation coefficient and density of samples made of ferrophosphorus and typical aggregates, steel powder, and nanosilica powder in different ratios. Therefore, 60 concrete samples with dimensions of 15×15×15 cm and different contents of the mentioned materials were prepared. After the density was measured, the linear attenuation coefficients of the samples were measured by gamma radiation emitted from the cesium-137 source. The results showed that ferrophosphorus was the most effective factor in increasing the linear attenuation coefficient and the density of the concrete. After ferrophosphorus, steel and nanosilica powder – although much less than ferrophosphorus – increased the density and linear attenuation coefficient. The sample made of 100% ferrophosphorus aggregate and 20% steel powder without nanosilica powder had the highest density of 4395 kg/m3, and the sample made of 100% typical aggregate and 10% steel powder, without nanosilica powder, had the lowest density equal to 2269 kg/m3. The highest linear attenuation coefficient – 0.295 was related to the sample made of 100% ferrophosphorus, 30% steel powder, and 5% nanosilica powder. The lowest linear attenuation coefficient – 0.151 was related to the sample made of 8% nanosilica, without the ferrophosphorus and steel powder. The results indicated that the concrete density was directly correlated with the linear attenuation coefficient.
{"title":"Ferrophosphorus aggregates shielding properties on heavy concrete exposed to gamma-rays, cesium-137 source","authors":"Reza Farokhzad, A. Dadashi, A. Sohrabi","doi":"10.32047/cwb.2021.26.4.4","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.4.4","url":null,"abstract":"This study aims to investigate the linear attenuation coefficient and density of samples made of ferrophosphorus and typical aggregates, steel powder, and nanosilica powder in different ratios. Therefore, 60 concrete samples with dimensions of 15×15×15 cm and different contents of the mentioned materials were prepared. After the density was measured, the linear attenuation coefficients of the samples were measured by gamma radiation emitted from the cesium-137 source. The results showed that ferrophosphorus was the most effective factor in increasing the linear attenuation coefficient and the density of the concrete. After ferrophosphorus, steel and nanosilica powder – although much less than ferrophosphorus – increased the density and linear attenuation coefficient. The sample made of 100% ferrophosphorus aggregate and 20% steel powder without nanosilica powder had the highest density of 4395 kg/m3, and the sample made of 100% typical aggregate and 10% steel powder, without nanosilica powder, had the lowest density equal to 2269 kg/m3. The highest linear attenuation coefficient – 0.295 was related to the sample made of 100% ferrophosphorus, 30% steel powder, and 5% nanosilica powder. The lowest linear attenuation coefficient – 0.151 was related to the sample made of 8% nanosilica, without the ferrophosphorus and steel powder. The results indicated that the concrete density was directly correlated with the linear attenuation coefficient.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"41 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75767764","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.5.7
R. Tuğrul Erdem
The paper discusses several research projects on CO 2 capture, storage or usage [CCS/U] technologies in the cement industry. The technology of reducing CO2 emissions by capturing it from flue gases in a cement kiln installation has the greatest reduction poten- tial, but at the same time requires large investments and additional infrastructure for the transfer of captured CO 2 , and is associated with an increased demand for electricity in the cement plant. The article presents the research projects carried out in which various solutions for both CO 2 capture and its further usage were used.
{"title":"Innovative technologies in the cement industry","authors":"R. Tuğrul Erdem","doi":"10.32047/cwb.2021.26.5.7","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.5.7","url":null,"abstract":"The paper discusses several research projects on CO 2 capture, storage or usage [CCS/U] technologies in the cement industry. The technology of reducing CO2 emissions by capturing it from flue gases in a cement kiln installation has the greatest reduction poten- tial, but at the same time requires large investments and additional infrastructure for the transfer of captured CO 2 , and is associated with an increased demand for electricity in the cement plant. The article presents the research projects carried out in which various solutions for both CO 2 capture and its further usage were used.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"25 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75855667","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.3.1
T. Baran
This article aims to present the possibility of reducing CO2 emission in the composite cement production, by using large amounts of industrial by-products and to present the possibility of reducing CO2 emission in the process of Portland clinker synthesis. The last one will be the result of using raw materials containing calcium compounds other than carbonates and the use of alternative fuels containing biomass for the synthesis of clinker, the combustion of which is not included in the CO2 emission balance. Replacing one mass % of CaO in the raw mix as limestone, reduces the emission by 8 kg CO2 per Mg of clinker. The reduction of CO2 emissions was evaluated and confirmed by industrial production trial. Clinker was produced using raw materials containing carbide lime or limestone fly ash. The results of the trial showed, that the use of 2%÷5% of Bełchatów calcareous fl y ash in the composition of the raw mix, allows of reducing the emission by 4.0÷10.3 kg of CO2 per Mg of Portland clinker. The use of 2%÷5% of carbide lime in the composition of the raw mix leads to emission reduction by 9.5÷23.9 kg of CO2 per Mg of Portland clinker. On the other hand, the development of composite cement production with a large amount of industrial by-products, seems to be the basic solution for the coming years, allowing a significant reduction of CO2 emission in the cement industry and in the concrete production.
本文旨在展示复合水泥生产中利用大量工业副产品减少CO2排放的可能性，以及波特兰熟料合成过程中减少CO2排放的可能性。最后一个将是使用含有碳酸盐以外的钙化合物的原料和使用含有生物质的替代燃料来合成熟料的结果，熟料的燃烧不包括在二氧化碳排放平衡中。用石灰石代替原混合料中1质量%的CaO，每Mg熟料可减少8 kg CO2的排放。通过工业生产试验，对CO2减排效果进行了评价和验证。熟料的原料含有碳化物、石灰或石灰石、粉煤灰。试验结果表明，在原料混合料中使用2%÷5% (Bełchatów)钙质粉煤灰，每Mg波特兰熟料可减少4.0÷10.3 kg的二氧化碳排放量。在原料混合物的组成中使用2%÷5%碳化石石灰可使每Mg波特兰熟料的二氧化碳排放量减少9.5÷23.9千克。另一方面，发展含有大量工业副产品的复合水泥生产似乎是未来几年的基本解决方案，这将大大减少水泥工业和混凝土生产中的二氧化碳排放。
{"title":"The use of waste and industrial by-products and possibilities of reducing CO2 emission in the cement industry – industrial trials","authors":"T. Baran","doi":"10.32047/cwb.2021.26.3.1","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.3.1","url":null,"abstract":"This article aims to present the possibility of reducing CO2 emission in the composite cement production, by using large amounts of industrial by-products and to present the possibility of reducing CO2 emission in the process of Portland clinker synthesis. The last one will be the result of using raw materials containing calcium compounds other than carbonates and the use of alternative fuels containing biomass for the synthesis of clinker, the combustion of which is not included in the CO2 emission balance. Replacing one mass % of CaO in the raw mix as limestone, reduces the emission by 8 kg CO2 per Mg of clinker. The reduction of CO2 emissions was evaluated and confirmed by industrial production trial. Clinker was produced using raw materials containing carbide lime or limestone fly ash. The results of the trial showed, that the use of 2%÷5% of Bełchatów calcareous fl y ash in the composition of the raw mix, allows of reducing the emission by 4.0÷10.3 kg of CO2 per Mg of Portland clinker. The use of 2%÷5% of carbide lime in the composition of the raw mix leads to emission reduction by 9.5÷23.9 kg of CO2 per Mg of Portland clinker. On the other hand, the development of composite cement production with a large amount of industrial by-products, seems to be the basic solution for the coming years, allowing a significant reduction of CO2 emission in the cement industry and in the concrete production.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87161184","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.3.8
S. Grzeszczyk
In my article “The truth about geopolymers” by S. Grzeszczyk, Cement Wapno Beton, 26 (3) (2021), 101-108, there is an information I would like to rectify. There is a sentence: “Industrial application of geopolymers in Poland is limited to the activity of professor Maolepszy, who used this binder of blast furnace slag activated with NaOH addition to the construction of the students’ hotel, in Cracow.” It should be: “The activity of professor Małolepszy includes the use of a slag-alkali binder, in which the activator was sodium carbonate. This material was used for the manufacturing of precast concrete units of the” Żerań “type, of which a building was erected in the 1970s in the area of the “Prefabet” company in Kraków, Poland. This building was examined for twenty years in terms of concrete strength and durability. In practice, a total of about 100 thousand cubic meters of slag-alkali concrete has been used in Poland.”
{"title":"Erratum to: “The truth about the geopolymers” S. Grzeszczyk, Cement Wapno Beton, 26(3) (2021), 101 – 108","authors":"S. Grzeszczyk","doi":"10.32047/cwb.2021.26.3.8","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.3.8","url":null,"abstract":"In my article “The truth about geopolymers” by S. Grzeszczyk, Cement Wapno Beton, 26 (3) (2021), 101-108, there is an information I would like to rectify. There is a sentence: “Industrial application of geopolymers in Poland is limited to the activity of professor Maolepszy, who used this binder of blast furnace slag activated with NaOH addition to the construction of the students’ hotel, in Cracow.” It should be: “The activity of professor Małolepszy includes the use of a slag-alkali binder, in which the activator was sodium carbonate. This material was used for the manufacturing of precast concrete units of the” Żerań “type, of which a building was erected in the 1970s in the area of the “Prefabet” company in Kraków, Poland. This building was examined for twenty years in terms of concrete strength and durability. In practice, a total of about 100 thousand cubic meters of slag-alkali concrete has been used in Poland.”","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"42 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88440128","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.2.3
A. Nazari
By the decision of the Editor-in-Chief, article (1) has been withdrawn from Issue 5 Volume 17 (2012) of the Cement Wapno Beton journal. The withdrawn article contains content borrowed without citation, e.g. from Jo et al. (2). The presented cement composition is identical to the cement composition presented in the work of Givi et al. (3). Also, some images taken from (2) were reused in other paper submitted at a similar time (4, 5) claiming, that they present different materials.We would like to apologize to the Readers of Cement Wapno Beton for this situation. We assure You that the Editorial Board makes every effort to avoid such situations. The authors did not respond to messages regarding the withdrawal of the article sent to them by the Editorial Office.
{"title":"Retraction Notice to: The influence of Al2O3 nanoparticles on the properties of traditional concrete with ground granulated blastfurnace slag as binder","authors":"A. Nazari","doi":"10.32047/cwb.2021.26.2.3","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.2.3","url":null,"abstract":"By the decision of the Editor-in-Chief, article (1) has been withdrawn from Issue 5 Volume 17 (2012) of the Cement Wapno Beton journal. The withdrawn article contains content borrowed without citation, e.g. from Jo et al. (2). The presented cement composition is identical to the cement composition presented in the work of Givi et al. (3). Also, some images taken from (2) were reused in other paper submitted at a similar time (4, 5) claiming, that they present different materials.We would like to apologize to the Readers of Cement Wapno Beton for this situation. We assure You that the Editorial Board makes every effort to avoid such situations. The authors did not respond to messages regarding the withdrawal of the article sent to them by the Editorial Office.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85561780","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.2.7
S. Grzeszczyk
{"title":"The truth about geopolymers","authors":"S. Grzeszczyk","doi":"10.32047/cwb.2021.26.2.7","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.2.7","url":null,"abstract":"","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"74 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84395297","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.1.3
E. Tkaczewska
In this paper, the infl uence of cement kiln by-pass dust on the properties of Portland cement and slag cement was studied. The reference cements used in the experiment were CEM I 42.5R and CEM III/A 42.5N. The cement kiln by-pass dust replacement of cement was 0.7% and 1.7%, to satisfy the Cl- ions content in cements: lower than or equal to 0.1%, following the demand of PN-EN 197-1:2012 standard. The following properties of cements were examined: the heat of hydration, water demand for normal consistency, initial setting time and compressive strength. The results showed that the addition of cement kiln by-pass dust of up to 1.7% has no negative effect on the properties of Portland cement and slag cement. The cements represent the same strength class, as without dust addition.
本文研究了水泥窑旁道粉尘对硅酸盐水泥和矿渣水泥性能的影响。实验采用的参考水泥为CEM I 42.5R和CEM III/A 42.5N。水泥窑旁道粉尘置换量分别为0.7%和1.7%，满足水泥中Cl-离子含量≤0.1%，符合PN-EN 197-1:2012标准要求。考察了水泥的以下性能:水化热、正常稠度需水量、初凝时间和抗压强度。结果表明:水泥窑旁道粉尘掺量不超过1.7%，对硅酸盐水泥和矿渣水泥的性能没有负面影响;胶结物与未添加粉尘的胶结物具有相同的强度等级。
{"title":"The influence of cement kiln by-pass dust addition on the properties of Portland and slag cement","authors":"E. Tkaczewska","doi":"10.32047/cwb.2021.26.1.3","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.1.3","url":null,"abstract":"In this paper, the infl uence of cement kiln by-pass dust on the properties of Portland cement and slag cement was studied. The reference cements used in the experiment were CEM I 42.5R and CEM III/A 42.5N. The cement kiln by-pass dust replacement of cement was 0.7% and 1.7%, to satisfy the Cl- ions content in cements: lower than or equal to 0.1%, following the demand of PN-EN 197-1:2012 standard. The following properties of cements were examined: the heat of hydration, water demand for normal consistency, initial setting time and compressive strength. The results showed that the addition of cement kiln by-pass dust of up to 1.7% has no negative effect on the properties of Portland cement and slag cement. The cements represent the same strength class, as without dust addition.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"596 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74719243","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.6.3
Alkan Hafçi, L. Turanli
This experimental study basically aims to come up with a new method [SCPT], which would be a reliable accelerated performance for predicting potential alkali reactivity of aggregates, because available test methods whether long or accelerated, have some drawbacks such as long test duration in the CPT [concrete prism test] and false tests results in the AMBT [accelerated mortar bar test]. The new method called as short-term concrete prism test [SCPT] has been designed with analysing the degree of correlation between the designed new methods and available test method by examining 32 types of aggregate, whosefield performances can be observable. Common specifications of the SCPT includes 50 mm x 50 mm x 200 mm concrete prisms, 16 mm maximum aggregate size, storage temperature at 60 °C and soak solution with 0.35N NaOH + 1% CaCl 2 and takes only 28 days.
{"title":"Development of a new short-term concrete prism test method (SCPT) to improve predictability for potential alkali reactivity of aggregates","authors":"Alkan Hafçi, L. Turanli","doi":"10.32047/cwb.2021.26.6.3","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.6.3","url":null,"abstract":"This experimental study basically aims to come up with a new method [SCPT], which would be a reliable accelerated performance for predicting potential alkali reactivity of aggregates, because available test methods whether long or accelerated, have some drawbacks such as long test duration in the CPT [concrete prism test] and false tests results in the AMBT [accelerated mortar bar test]. The new method called as short-term concrete prism test [SCPT] has been designed with analysing the degree of correlation between the designed new methods and available test method by examining 32 types of aggregate, whosefield performances can be observable. Common specifications of the SCPT includes 50 mm x 50 mm x 200 mm concrete prisms, 16 mm maximum aggregate size, storage temperature at 60 °C and soak solution with 0.35N NaOH + 1% CaCl 2 and takes only 28 days.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"73 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90574189","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}
Pub Date : 2021-01-01DOI: 10.32047/cwb.2021.26.6.1
Murat Özocak, C. Şişman
Today, the increase in heating and energy costs has increased the importance of insulation in buildings and new searches are being made for this purpose. As a result of these searches, studies on the production of lightweight concrete have come to the forefront, to improve the insulation properties of concrete. In this study, the usability of hazelnut shells, one of the important agricultural products of Turkey, which are post-harvest waste materials as a lightweight aggregate in concrete, was investigated. To this end, concrete was produced by replacing the aggregate with hazelnut shell by 3%, 6%, 9%, 12% and 15%, and the physical, mechanical and thermal properties of this concrete, were examined. As a result of the study, it was determined that hazelnut shell, which is an agricultural waste, could be used as aggregate in the production of concrete and that lightweight concrete with sufficient strength and durability and improved heat and sound insulation could be produced, provided that the amount of hazelnut shell to be added to the mixture would not be more than 10% of the aggregate.
{"title":"Opportunities for the use of hazelnut shell as a lightweight aggregate in the production of concrete","authors":"Murat Özocak, C. Şişman","doi":"10.32047/cwb.2021.26.6.1","DOIUrl":"https://doi.org/10.32047/cwb.2021.26.6.1","url":null,"abstract":"Today, the increase in heating and energy costs has increased the importance of insulation in buildings and new searches are being made for this purpose. As a result of these searches, studies on the production of lightweight concrete have come to the forefront, to improve the insulation properties of concrete. In this study, the usability of hazelnut shells, one of the important agricultural products of Turkey, which are post-harvest waste materials as a lightweight aggregate in concrete, was investigated. To this end, concrete was produced by replacing the aggregate with hazelnut shell by 3%, 6%, 9%, 12% and 15%, and the physical, mechanical and thermal properties of this concrete, were examined. As a result of the study, it was determined that hazelnut shell, which is an agricultural waste, could be used as aggregate in the production of concrete and that lightweight concrete with sufficient strength and durability and improved heat and sound insulation could be produced, provided that the amount of hazelnut shell to be added to the mixture would not be more than 10% of the aggregate.","PeriodicalId":55632,"journal":{"name":"Cement Wapno Beton","volume":"32 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76912688","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}
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