Pub Date : 2022-09-01DOI: 10.1590/0366-69132022683873268
I. F. Torres, S. M. Torres
Motivated by their low cost, lignosulfonate-based water reducers are the most used type of admixture in the concrete industry worldwide. Due to the plurality of types of lignosulfonates (LSs) and the recent update to the Brazilian standard for admixtures for concrete, the objective of this work was to investigate the impact of sodium (Na-LS) and magnesium (Mg-LS) lignosulfonates, raw materials present in the Brazilian market, in pastes and concretes produced with cement type CP II F 40 under different dosages (0.40% and 0.80%). For this, the following tests were performed: adsorption curves, isothermal calorimetry, microanalytical tests (TGA/DTG and DRX), and application in the concrete according to NBR 11768-1 standard. The results showed different hydration evolutions among the pastes produced with these lignosulfonates. As a consequence, despite the similarity in water reduction, it was verified that Mg-LS was more suitable for RA1-R (water reducer-retarder, setting time 120-360 min), while Na-LS was more suitable for RA1 (water reducer, setting time 30-160 min).
由于成本低，木质素磺酸基减水剂是世界范围内混凝土工业中使用最多的外加剂。由于多种类型的木质素磺酸盐(LSs)以及最近巴西混凝土外加剂标准的更新，本研究的目的是研究巴西市场上存在的原材料钠(Na-LS)和镁(Mg-LS)木质素磺酸盐在不同剂量(0.40%和0.80%)下用CP II f40型水泥生产的膏体和混凝土中的影响。为此，进行了吸附曲线、等温量热法、微量分析(TGA/DTG和DRX)测试，并按照NBR 11768-1标准在混凝土中的应用。结果表明，不同木质素磺酸盐制备的膏体水化过程不同。因此，尽管减水量相似，但证实Mg-LS更适合于RA1- r(减水剂，凝结时间120-360 min)，而Na-LS更适合于RA1(减水剂，凝结时间30-160 min)。
{"title":"Evaluation of the influence of sodium and magnesium lignosulfonates on the hydration kinetics of cementitious paste","authors":"I. F. Torres, S. M. Torres","doi":"10.1590/0366-69132022683873268","DOIUrl":"https://doi.org/10.1590/0366-69132022683873268","url":null,"abstract":"Motivated by their low cost, lignosulfonate-based water reducers are the most used type of admixture in the concrete industry worldwide. Due to the plurality of types of lignosulfonates (LSs) and the recent update to the Brazilian standard for admixtures for concrete, the objective of this work was to investigate the impact of sodium (Na-LS) and magnesium (Mg-LS) lignosulfonates, raw materials present in the Brazilian market, in pastes and concretes produced with cement type CP II F 40 under different dosages (0.40% and 0.80%). For this, the following tests were performed: adsorption curves, isothermal calorimetry, microanalytical tests (TGA/DTG and DRX), and application in the concrete according to NBR 11768-1 standard. The results showed different hydration evolutions among the pastes produced with these lignosulfonates. As a consequence, despite the similarity in water reduction, it was verified that Mg-LS was more suitable for RA1-R (water reducer-retarder, setting time 120-360 min), while Na-LS was more suitable for RA1 (water reducer, setting time 30-160 min).","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67185509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863271
S. Silva, F. P. D. Costa, J. V. Fernandes, J. B. D. C. A. D. Melo, R. Menezes, G. A. Neves, A. M. Rodrigues
{"title":"Manufacturing and characterization of sustainable macroporous glass foams","authors":"S. Silva, F. P. D. Costa, J. V. Fernandes, J. B. D. C. A. D. Melo, R. Menezes, G. A. Neves, A. M. Rodrigues","doi":"10.1590/0366-69132022683863271","DOIUrl":"https://doi.org/10.1590/0366-69132022683863271","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47880035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863259
M. M. Barros, K. Almeida, S. A. Silva, G. Botelho
{"title":"Synthesis and characterization of α-SnWO4 powders obtained by microwave-assisted hydrothermal method","authors":"M. M. Barros, K. Almeida, S. A. Silva, G. Botelho","doi":"10.1590/0366-69132022683863259","DOIUrl":"https://doi.org/10.1590/0366-69132022683863259","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67185503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863221
L. Palhares, D. F. Galvão, P. R. P. Paiva
{"title":"Effects of plaster to water ratio on physical and mechanical properties of ceramic pieces produced by the slip casting process","authors":"L. Palhares, D. F. Galvão, P. R. P. Paiva","doi":"10.1590/0366-69132022683863221","DOIUrl":"https://doi.org/10.1590/0366-69132022683863221","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67184721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863225
W. Tong, W. Q. Jaw, L. Pothunuri, E. Soh, H. Ferrand
{"title":"Easily applicable protocol to formulate inks for extrusion-based 3D printing","authors":"W. Tong, W. Q. Jaw, L. Pothunuri, E. Soh, H. Ferrand","doi":"10.1590/0366-69132022683863225","DOIUrl":"https://doi.org/10.1590/0366-69132022683863225","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67185322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863210
G. S. D. A. E. Silva, R. M. Leal Neto, M. Filgueira, C. Baptista, C. Santos, A. S. Ramos
{"title":"Microstructure and diametral fracture strength of spark plasma sintered WC-6Co-0.2B and WC-6Co-0.5B ceramic composites from nanosized and metastable WC powders","authors":"G. S. D. A. E. Silva, R. M. Leal Neto, M. Filgueira, C. Baptista, C. Santos, A. S. Ramos","doi":"10.1590/0366-69132022683863210","DOIUrl":"https://doi.org/10.1590/0366-69132022683863210","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67184924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863202
P. Valentini, M. Lunardi, C. W. Menegotto, C. S. Kazmierczak, M. P. Kulakowski
{"title":"Methodology for evaluation of the influence of roughness and capillary absorption of ceramic blocks on the render’s tensile bond strength","authors":"P. Valentini, M. Lunardi, C. W. Menegotto, C. S. Kazmierczak, M. P. Kulakowski","doi":"10.1590/0366-69132022683863202","DOIUrl":"https://doi.org/10.1590/0366-69132022683863202","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48128867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863168
G. K. Mishra, N. K. Mohanty, B. Behera
{"title":"Analysis of dielectric and electrical transport properties of NdFeAsO ceramic","authors":"G. K. Mishra, N. K. Mohanty, B. Behera","doi":"10.1590/0366-69132022683863168","DOIUrl":"https://doi.org/10.1590/0366-69132022683863168","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67185155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-01DOI: 10.1590/0366-69132022683863198
N. R. D. Souza, P. R. P. Paiva
{"title":"Evaluation of the self-healing capacity of ceramics produced with alumina and silicon carbide","authors":"N. R. D. Souza, P. R. P. Paiva","doi":"10.1590/0366-69132022683863198","DOIUrl":"https://doi.org/10.1590/0366-69132022683863198","url":null,"abstract":"","PeriodicalId":9824,"journal":{"name":"Cerâmica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67184841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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