Advances in Cement Research最新文献_第2页

Amazon açaí fiber-Portland cement compatibility: a challenge to produce cement-bonded fiberboards? 亚马逊阿萨伊纤维与硅酸盐水泥的兼容性：生产水泥粘结纤维板的挑战？

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-05-05 DOI: 10.1680/jadcr.23.00074

Dhimitrius Neves Paraguassú Smith de Oliveira, Tiago Marcolino de Souza, Nilson dos Santos Ferreira, Jefferson Bezerra Bezerra, Guillaume Polidori, Lina Bufalino

{"title":"Amazon açaí fiber-Portland cement compatibility: a challenge to produce cement-bonded fiberboards?","authors":"Dhimitrius Neves Paraguassú Smith de Oliveira, Tiago Marcolino de Souza, Nilson dos Santos Ferreira, Jefferson Bezerra Bezerra, Guillaume Polidori, Lina Bufalino","doi":"10.1680/jadcr.23.00074","DOIUrl":"https://doi.org/10.1680/jadcr.23.00074","url":null,"abstract":"The açaí waste from Amazon contains short fibers that show potential for reinforcing cement-bonded fiberboards (CBFBs), although their compatibility with cement matrix is still unknown. This work aimed to characterize raw and pretreated açaí fibers and analyze their compatibility with Portland cement by different techniques, besides developing a CBFB. The fibers were subjected to thermal (180, 200, and 220 °C), cold and hot water, alkaline (NaOH), and bleaching (NaOH-H2O2) pretreatments. The chemical and water pretreatments raised the fiber crystalline indexes (28%-57%). The chemical pretreatments individualized the fiber bundles and removed hemicelluloses. Alkali-pretreated and raw fibers had the highest (96%) and lowest (65%) cement compatibility indexes. Portlandite and ettringite appeared after 24 h for most pastes but were delayed for raw and 220 °C-pretreated fibers. In contrast, only the raw fiber specimens reached the required compression strength of 34 MPa after 28 days; hence, they were chosen to produce a CBFB. The boards showed proper thickness swelling (1.4%), but low bending strength (MOE = 647.8 MPa; MOR = 1.9 MPa). Overall, the fiber modifications improved the compatibility with cement, but not the composite's mechanical strength. Açai-fiber CBFB is a promising building material, but future studies must overcome its poor mechanical performance.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140884224","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

Influences of metakaolin and calcined clay blended cement on chloride resistance and electrical resistivity of concrete 偏高岭土和煅烧粘土混合水泥对混凝土抗氯性和电阻率的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-05-05 DOI: 10.1680/jadcr.23.00162

Aunchana Kijjanon, Taweechai Sumranwanich, Somnuk Tangtermsirikul

{"title":"Influences of metakaolin and calcined clay blended cement on chloride resistance and electrical resistivity of concrete","authors":"Aunchana Kijjanon, Taweechai Sumranwanich, Somnuk Tangtermsirikul","doi":"10.1680/jadcr.23.00162","DOIUrl":"https://doi.org/10.1680/jadcr.23.00162","url":null,"abstract":"There are many different grades of kaolinite clays around the world. Low-grade kaolinite clay is more abundant than high-grade kaolinite clay in various regions. To aim toward the utilization of low-grade kaolinite clay having an original kaolinite content of about 40% to produce calcined clay, this paper investigated the durability properties of concrete incorporating calcined clay produced from high-grade kaolinite clay or high kaolinite content (commercially available metakaolin or CC1) and calcined clay produced from a low-grade kaolinite clay (CC2). Concrete mixtures were designed to have a water-to-binder ratio of 0.60. A fly ash-to-binder ratio of 0.20 and calcined kaolinite clay-to-binder ratios of 0.10 and 0.20 were studied. The chloride penetration resistance and the electrical resistivity of concrete were assessed, while the mercury intrusion porosimetry (MIP) was utilized in evaluating the pore structure of concrete. The test results revealed that concrete with CC1 and CC2 exhibited superior chloride penetration resistance and chloride binding capacity than OPC and FA20 concretes. Moreover, using a higher calcined clay-to-binder ratio resulted in a more refined pore structure, which significantly enhanced the chloride resistance of concrete. Although CC2 revealed less performance in improving chloride resistance than CC1, it had superior performance compared to fly ash.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140889827","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

3D printing concrete technology from a rheology perspective: a review 从流变学角度看 3D 打印混凝土技术：综述

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-04-21 DOI: 10.1680/jadcr.23.00205

Liuhua Yang, Yang Gao, Hui Chen, Huazhe Jiao, Mengmeng Dong, Thomas A. Bier, Mintae Kim

引用次数: 0

Investigation of anionic group characteristics of PCEs on the behavior of fly ash cementitious systems 研究聚氯乙烯阴离子基团特性对粉煤灰胶凝体系行为的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-04-07 DOI: 10.1680/jadcr.23.00201

Kemal Karakuzu, Veysel Kobya, Ali Mardani, Burak Felekoğlu, Kambiz Ramyar

{"title":"Investigation of anionic group characteristics of PCEs on the behavior of fly ash cementitious systems","authors":"Kemal Karakuzu, Veysel Kobya, Ali Mardani, Burak Felekoğlu, Kambiz Ramyar","doi":"10.1680/jadcr.23.00201","DOIUrl":"https://doi.org/10.1680/jadcr.23.00201","url":null,"abstract":"This study investigated the compatibility of polycarboxylate-based water reducing admixtures (PCE) having different carboxylate, phosphate and sulfonate anionic groups with paste and mortar mixtures containing fly ash. According to the results, with the increase of the fly ash content of the mixtures, PCE requirement for the target flow decreased, as well as consistency retention performance improved due to the decrease in the amount of hydrated cement. An improvement in rheological parameters was observed with the increase in fly ash content from 15% to 30%. However, increasing the fly ash replacement level beyond 30% caused stability problems in the mixtures. This problem was eliminated with PCE addition. In the paste and mortar mixtures, regardless of the fly ash substitution ratio, the best performance was obtained with PCEs containing 7% and 5% phosphate and sulfonate, respectively. The most suitable fly ash replacement ratio in terms of rheological parameters and 28-day compressive strength was 30% and 15%, respectively. It was observed that PCE anionic group content did not have any significant effect on all fly ash substitution ratios.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140625433","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

Assessment of meta-schist as a novel sustainable resource for Portland cement manufacturing 评估作为硅酸盐水泥生产新型可持续资源的元片石

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-29 DOI: 10.1680/jadcr.23.00132

Abdul Korkmaz, Hasan Hacifazlioğlu

{"title":"Assessment of meta-schist as a novel sustainable resource for Portland cement manufacturing","authors":"Abdul Korkmaz, Hasan Hacifazlioğlu","doi":"10.1680/jadcr.23.00132","DOIUrl":"https://doi.org/10.1680/jadcr.23.00132","url":null,"abstract":"In this study, the use of meta-schist as an alternative to sand-clay in preparing cement raw mixtures was investigated for the first time. Although there are high meta-schist reserves in many countries, especially in Turkey and America, there have not been enough experimental studies for their use in cement production, and their superior technical features still need to be demonstrated. To produce the highest quality Portland cement clinker by examining the mineral and chemical properties of meta-schists, two different raw meal samples were prepared, utilizing conventional cement clay as a baseline sample ((PC) Ref) and the other with meta-schist ((PC) MSC). The effects of both raw mixtures on burnability tests and reactivity were evaluated based on the unreacted lime content in samples after sintered at 1200, 1300, 1350, 1400, and 1450 °C. As a result of firing at 1450 °C, ((PC) MSC) exhibited good sintering properties by showing less than 1% free lime by weight. The porosity amount, distribution, grain structure of silicate phase crystals and equivalent crystal diameters and amounts of meta-schist clinker phases (C3S, C2S, C3A and C4AF) examined by polarizing optical microscope showed that they are suitable for the production of PC. The point counting method, Bogue model calculations, and XRD patterns have confirmed this result. The hydration products of the cement mortars were determined by SEM and EDX analysis at 2, 7, and 28 days. In addition, the compressive strength test results of ((PC) MSC) and ((PC) Ref) mortars after 28 days of curing ranged between 57 and 55,5 MPa, and the produced cement was classified as CEM I 42,5R.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140322746","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

Experimental investigation on chemical and thermomechanical properties of concrete incorporating Washingtonia Robusta fibers 掺入华盛顿罗布斯塔纤维的混凝土化学和热力学性能实验研究

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-25 DOI: 10.1680/jadcr.23.00036

Sakami Siham, Lahcen Boukhattem, Mustapha Boumhaout

{"title":"Experimental investigation on chemical and thermomechanical properties of concrete incorporating Washingtonia Robusta fibers","authors":"Sakami Siham, Lahcen Boukhattem, Mustapha Boumhaout","doi":"10.1680/jadcr.23.00036","DOIUrl":"https://doi.org/10.1680/jadcr.23.00036","url":null,"abstract":"This work aims to provide new composite material for thermal insulating building applications. The composite was made with mortar reinforced with natural fibers that were extracted from petiole of WR palm tree. The used fibers were first chemically characterized by EDS, SEM, X-ray and infrared diffractometry spectroscopies as well as tensile test to know their morphological structure. Afterward, the fibers were incorporated into mortar with different mass percentages varying from 0 to 4% to experimentally determine the thermomechanical properties of the manufactured samples. The chemical findings indicated that the WR fibers are rich in cellulose, hemicellulose, and lignin, and possess high crystallinity index; which enhance the mechanical properties and durability of the composite. Furthermore, the obtained density of the composite W2RC4% is of 1305 kg/m3 and less than 2000 kg/m³; this composite can be then classified as lightweight concretes according to the standard NF EN 206+A2/CN (2022). The thermal conductivity and thermal effusivity dropped by about 60% and 42% respectively. Moreover, the WR reduces the compressive strength (76%) and the flexural strength (36%) to minimum values respectively of 5.9 MPa and 3.8 MPa. These values meet the mechanical requirements of lightweight concretes (>3.5 MPa).","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140314963","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

Durability of concrete subjected to acidic exposure attack under flexural loading 混凝土在挠曲荷载下受酸性暴露侵蚀的耐久性

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-23 DOI: 10.1680/jadcr.23.00101

Beixing Li, Hongtian Yang, Xiaolu Yuan

{"title":"Durability of concrete subjected to acidic exposure attack under flexural loading","authors":"Beixing Li, Hongtian Yang, Xiaolu Yuan","doi":"10.1680/jadcr.23.00101","DOIUrl":"https://doi.org/10.1680/jadcr.23.00101","url":null,"abstract":"Durability of concrete under the combined exposure of acidic environment and flexural loading has been studied. Concrete specimens were made and subjected to 168 days exposure to the flexural loading (stress levels of 0.0, 0.35 and 0.5 of their 28d flexural strength) and acidic exposure environment. Concrete properties including neutralization depth, mass change, compressive strength and flexural strength were measured. Compositions of samples were determined by means of x-ray diffraction and chemical analysis. Microstructure of samples was conducted using scanning electron microscope. Results indicate that with the stress level rising from 0.0 to 0.5, the performance of concrete deteriorated gradually and the deterioration of the tension zone was greater than that of the compression zone; concrete performances improved within 28 days and afterwards deteriorated dramatically; acidic solution reacted with cement paste, leading to the formation of harmful gypsum and the decomposition and dissolution of hydration products of cement; the increase of stress level increased the porosity of concrete, accelerating the rate of acid erosion, which led to the deterioration of concrete performance.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140210890","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

Solid solutions amongst cement AFm phases containing nitrate and nitrite ions 含有硝酸盐和亚硝酸盐离子的水泥 AFm 相中的固溶体

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-16 DOI: 10.1680/jadcr.23.00010

Magdalena Balonis

引用次数: 0

Investigating the sulfate resistance of mortars with multiple mineral admixtures in ammonium-magnesium sulfate solution 研究硫酸铵-镁溶液中含有多种矿物掺合料的砂浆的抗硫酸盐性能

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-11 DOI: 10.1680/jadcr.23.00193

Junfeng Wang, Yiming Chen, Qionglin Fu, Liulei Lu

{"title":"Investigating the sulfate resistance of mortars with multiple mineral admixtures in ammonium-magnesium sulfate solution","authors":"Junfeng Wang, Yiming Chen, Qionglin Fu, Liulei Lu","doi":"10.1680/jadcr.23.00193","DOIUrl":"https://doi.org/10.1680/jadcr.23.00193","url":null,"abstract":"This study aims to evaluate the sulfate resistant of mortars containing sulfate-resistant cementitious materials (SRCMs) developed by mixing ground granulated blast furnace slag, fly ash, silica fume, and desulfurization gypsum. Compressive strength test, XRD, DTA, and MIP were carried out in this work. The results showed that the sulfate resistance of mortars mixed with SRCMs at replacement percentage of 74 wt.% was superior to that of mortars with 30 wt.% fly ash when they were exposed to drying-wetting cycle in sodium sulfate solution, which was because adding SRCMs decreased Ca(OH)2 content, causing a reduction in gypsum formation. Moreover, reducing W/B from 0.50 to 0.35 increased the loss of compressive strength ratio (Lf) of mortars with SRCMs immersed in ammonium-magnesium sulfate complex solution. Specifically, Lf values of mortars with W/B of 0.50 and 0.35 were 42.7% and 36.0% after 100 days of immersion, respectively. Furthermore, the main components of samples subjected to complex solution were identified as gypsum. Further, both Lf and porosity presented a strong linear positive correlation with W/B. At last, the findings of this study confirmed that optimizing the composition of cementitious materials and lowering W/B could improve the sulfate resistance of concretes used for sulfate-rich sewage environment.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140251380","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

The dispersion and influence of graphene oxide modified polycarboxylate superplasticizer in alkaline cement solution 氧化石墨烯改性聚羧酸盐超塑化剂在碱性水泥溶液中的分散及其影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2024-03-11 DOI: 10.1680/jadcr.23.00217

Han Zhou, Dongxu Li

引用次数: 0