CEMENT Pub Date : 2022-09-01 DOI: 10.1016/j.cement.2022.100042

Kanako Toda , Daisuke Minato , Takumi Saito , Ryosuke Kikuchi , Tsubasa Otake , Tsutomu Sato

{"title":"Effects of lignosulfonate on synthesis products of the pozzolanic reaction","authors":"Kanako Toda , Daisuke Minato , Takumi Saito , Ryosuke Kikuchi , Tsubasa Otake , Tsutomu Sato","doi":"10.1016/j.cement.2022.100042","DOIUrl":"https://doi.org/10.1016/j.cement.2022.100042","url":null,"abstract":"<div>Soil organic matters may inhibit the pozzolanic reaction, and thus influence the strength development of soil-employed construction materials. To understand their interaction, the effect of lignosulfonate, here used as model soil organic matter, on the pozzolanic reaction was investigated through batch experiments. Lignosulfonate inhibited the pozzolanic reaction, suppressing calcium silicate hydrate (C-S-H) formation. The suppression did not take place in a continuous way with the addition of lignosulfonate but was triggered at a certain dosage of lignosulfonate. We propose that the inhibition was primarily due to formation of Si-(Ca)-lignosulfonate complex. Such interaction may illustrate the inhibition of the pozzolanic reaction by organic matters in soils at alkaline activation. Below the threshold, lignosulfonate allowed C-S-H formation though modified its structure, which also suggested the possibility of soil organic matters to influence the strength development of construction materials in coexistence of C-S-H formation.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"9 ","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000214/pdfft?md5=b8795d6354da5ab2011f26cdf287ff38&pid=1-s2.0-S2666549222000214-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92022091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of TiO2 waste on the formation of clinker phases and mechanical performance and hydration of Portand cement TiO2废渣对水泥熟料相形成、力学性能及水化性能的影响

CEMENT Pub Date : 2022-09-01 DOI: 10.1016/j.cement.2022.100036

José S. Andrade Neto , Bruna B. Mariani , Nilson S. Amorim Júnior Junior , Daniel V. Ribeiro

{"title":"Effects of TiO2 waste on the formation of clinker phases and mechanical performance and hydration of Portand cement","authors":"José S. Andrade Neto , Bruna B. Mariani , Nilson S. Amorim Júnior Junior , Daniel V. Ribeiro","doi":"10.1016/j.cement.2022.100036","DOIUrl":"10.1016/j.cement.2022.100036","url":null,"abstract":"<div>The incorporation of different levels of UOW into Portland clinker raw meals and its effects on the clinker and cement properties were evaluated. Clinkers were produced and characterized by X-ray diffractometry (XRD) and optical microscopy; the cements were produced and physically characterized. Finally, pastes were produced and analyzed using isothermal calorimetry, thermogravimetry, XRD, and compressive strength tests. UOW, when added up to 1.29% in Portland clinker raw meal, acts as a mineralizer, increasing the content of alite by 6.44%. The incorporation of UOW reduces the hydration rate in the first days owing to the increase in the size of the alite crystals and delays the point of sulfate depletion due to the increase in the SO3 content of the clinkers. Owing to the higher content of alite formed, the cement produced from the raw meal with 1.29% of UOW presents the highest early mechanical strength (up to 7 days).</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"9 ","pages":"Article 100036"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000160/pdfft?md5=72ac96e689424284be2f72714f0e0a8b&pid=1-s2.0-S2666549222000160-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74985842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Factors influencing the time dependence of porosity relaxation in cement during sorption: Experimental results from spatially resolved NMR 影响水泥吸附过程中孔隙松弛时间依赖性的因素:来自空间分辨核磁共振的实验结果

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100028

Magdalena Janota, Ors Istok, David A. Faux, Peter J. McDonald

引用次数: 1

Reaction kinetics of supplementary cementitious materials in reactivity tests 反应性试验中补充胶凝材料的反应动力学

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100022

Sivakumar Ramanathan , Luis Ruiz Pestana , Prannoy Suraneni

引用次数: 7

Water-to-cement ratio of calcium sulfoaluminate belite cements: Hydration, setting time, and strength development 硫铝酸钙白石水泥的水灰比:水化、凝结时间和强度发展

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100032

Lisa E. Burris , Kimberly E. Kurtis

{"title":"Water-to-cement ratio of calcium sulfoaluminate belite cements: Hydration, setting time, and strength development","authors":"Lisa E. Burris , Kimberly E. Kurtis","doi":"10.1016/j.cement.2022.100032","DOIUrl":"10.1016/j.cement.2022.100032","url":null,"abstract":"<div>Little published data is available to guide engineers in designing calcium sulfoaluminate belite (CSAB) cement mixtures with adequate workability, strength, and durability. This lack of understanding of design factors, especially the effect of varying w/c, represents a significant barrier to widespread CSAB use. In this study hydration, setting time, and strength development of two CSAB cements with w/c from 0.3 – 0.6 were evaluated. CSAB reaction kinetics varied with increased w/c depending on CSAB composition, specifically calcium sulfate content – with higher w/c increasing retardation in higher anhydrite/ye'elimite content cement, but reduced retardation in lower anhydrite/ye'elimite cement. For both cements, greater w/c led to greater total hydration, increased setting times, and reduced compressive strengths in the pastes and mortar samples. Setting time was linked more closely to anhydrite content than w/c, with greater sulfate volumes shortening setting times.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000123/pdfft?md5=7bd215f81bb7774c1c827e5fad80db1a&pid=1-s2.0-S2666549222000123-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88146042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Mechanical properties and electrical resistivity of portland limestone cement concrete systems containing greater than 15% limestone and supplementary cementitious materials 含有大于15%石灰石和补充胶凝材料的硅酸盐石灰石水泥混凝土体系的机械性能和电阻率

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100026

Jose E. Garcia , Nicolas B. Tiburzi , Kevin J. Folliard , Thanos Drimalas

{"title":"Mechanical properties and electrical resistivity of portland limestone cement concrete systems containing greater than 15% limestone and supplementary cementitious materials","authors":"Jose E. Garcia , Nicolas B. Tiburzi , Kevin J. Folliard , Thanos Drimalas","doi":"10.1016/j.cement.2022.100026","DOIUrl":"10.1016/j.cement.2022.100026","url":null,"abstract":"<div>This investigation explored the feasibility of producing strong, good quality, durable concrete in low-clinker systems (less than 50% clinker in some cases). The low-clinker content was achieved by combining interground portland limestone cement (PLC) with high limestone contents and different supplementary cementitious materials (SCMs). Seven cements, with approximate limestone contents between 3% and 31%, from two cement plants were used, in combination with SCMs, in forty-two different mixtures with water-cementitious materials ratios (w/cm) of 0.40 and 0.45. The SCMs included Class F and C fly ashes, Grade 100 slag, and silica fume. Mechanical properties (compressive strength, tensile strength, elastic modulus) and electrical resistivity were measured at 1, 7, 28, and 91 days. Similar compressive strengths were observed for mixtures with equivalent effective w/cm ratios. Although, the combination of PLCs with SCMs for very low-clinker systems resulted in decreased compressive strength, an increase in electrical resistivity was observed. More importantly, strong, good-quality concrete can be produced without sacrificing environmental benefits.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000068/pdfft?md5=5bfc91c24335d9aad7c9eb3633dbe3d9&pid=1-s2.0-S2666549222000068-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83981766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Effect of limestone fillers on CO2 and water vapour diffusion in carbonated concrete 石灰石填料对碳化混凝土中CO2和水蒸气扩散的影响

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100027

Sarah Steiner , Tilo Proske , Frank Winnefeld , Barbara Lothenbach

{"title":"Effect of limestone fillers on CO2 and water vapour diffusion in carbonated concrete","authors":"Sarah Steiner , Tilo Proske , Frank Winnefeld , Barbara Lothenbach","doi":"10.1016/j.cement.2022.100027","DOIUrl":"10.1016/j.cement.2022.100027","url":null,"abstract":"<div>Replacing Portland cement clinker partially with limestone powder offers economic and ecological benefits but may decrease the resistance against carbonation. The diffusivity of carbon dioxide and the moisture conditions in concrete significantly influence the carbonation rate. Thus a test method was developed to determine the effective CO2 diffusion coefficient (DCO2). Additionally, the water vapour diffusion coefficients (DH2O) were analysed. DCO2 and DH2O increase with increasing water-to-cement ratios (w/c, related to the CEM I content in the binder). At the same w/c ratio, higher amounts of limestone decrease DCO2 and DH2O and increase compressive strength. DCO2 and DH2O show a linear correlation for samples with w/c ≥ 0.6 but a non-linear relationship for dense concrete (w/c ≤ 0.5). DCO2 ranges from 2.6−9 m2/s to 1.9−7 m2/s for w/c of 0.5 and 1.25, respectively. DH2O were between 2.8−8 m2/s and 4.5−7 m2/s. A model for estimating DCO2 in concrete with high limestone contents was derived based on the experimental analysis of the correlations between mix design, compressive strength, and CO2 diffusion.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266654922200007X/pdfft?md5=cbd303c0b6afd39e497dfcb43b3ef654&pid=1-s2.0-S266654922200007X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75485989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Control the early-stage hydration of expansive additive from calcium sulfoaluminate clinker by polymer encapsulation 采用聚合物包封的方法控制硫铝酸钙熟料膨胀添加剂的早期水化

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100021

Malinee Nontikansak , Phattarakamon Chaiyapoom , Wanwipa Siriwatwechakul Ph.D. , Passarin Jongvisuttisun Ph.D. , Chalermwut Snguanyat

{"title":"Control the early-stage hydration of expansive additive from calcium sulfoaluminate clinker by polymer encapsulation","authors":"Malinee Nontikansak , Phattarakamon Chaiyapoom , Wanwipa Siriwatwechakul Ph.D. , Passarin Jongvisuttisun Ph.D. , Chalermwut Snguanyat","doi":"10.1016/j.cement.2022.100021","DOIUrl":"10.1016/j.cement.2022.100021","url":null,"abstract":"<div>Ye′elimite (C4A3<math><mover><mi>S</mi><mo>¯</mo></mover></math>), a main compound in calcium sulfoaluminate (CSA) clinker, is an important ingredient as expansive additive in shrinkage compensating cement. This study proposes to modify the expansive additive by encapsulating it with polyethylene glycol (PEG). The polymer provides a matrix structure, in which the ye′elimite particles are embedded. When the modified expansive additive come into contact with water, the polymer matrix acts as a water barrier, but can dissolve away. This slowly exposed C4A3<math><mover><mi>S</mi><mo>¯</mo></mover></math> to hydration, resulting in gradual early-stage ettringite formation; hence control early expansion in expansive cement. The study compared the ettringite formation between the unmodified and the modified expansive additive using thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM) from 1 hour to 3 days. The results show that the unmodified expansive additive generated more ettringite than the modified ones at the same hydration time. The study subsequently investigated the mortar properties with the unmodified and modified expansive additives admixtures. The results showed that the modified expansive cement showed superior flowability and drying shrinkage behaviours, while the compressive strength of the finished products underperformed that of the untreated expansive additives.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100021"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000019/pdfft?md5=a7d4097d9d87552513d6539339330b1c&pid=1-s2.0-S2666549222000019-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74684453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of Ground Granulated Blast Furnace Slag on the compressive strength and ductility of Ultra High-performance fibre reinforced cementitious composites 磨粒化炉渣对高性能纤维增强胶凝复合材料抗压强度和延性的影响

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100030

Gideon Ayim-Mensah , Milan Radosavljevic

{"title":"Influence of Ground Granulated Blast Furnace Slag on the compressive strength and ductility of Ultra High-performance fibre reinforced cementitious composites","authors":"Gideon Ayim-Mensah , Milan Radosavljevic","doi":"10.1016/j.cement.2022.100030","DOIUrl":"10.1016/j.cement.2022.100030","url":null,"abstract":"<div>The mechanical properties of Ultra High Performance Fibre Reinforced Cementitious Composite (UHPFRCC) is basically influenced by the type of fibres and reactive binders used. Fibres primarily influence the ductility whereas reactive binders influence the compressive strength of UHPFRCC. Among the commonly used reactive binders, Ground Granulated Blast Furnace Slag (SL) with its vitreous nature has the ability of influencing both the compressive strength and ductility of UHPFRCC. This study discussed the microstructure and mechanical properties of six different mixtures made up of 0%, 20%, 40%, 60% 75% and 90% cement replacement of SL. The XRD results indicated that, increased levels of C-S-H and ettringite retard the hydration process leading to lower compressive strength and vice versa. The SL-cementitious composite can achieve a compressive strength of up to 108.1MPa and ductility of up to 1.67% without the use of fibres. The maximum compressive strength and ductility were achieved with 40% SL replacement of cement whereas the minimum compressive strength and ductility were achieved with 60% and 20% SL contents, respectively. Moreover, the optimum mechanical properties (i.e. compressive strength, tensile strength, flexural strength, and tensile strain) were achieved with a 40% SL replacement of cement in the cementitious composite.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100030"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266654922200010X/pdfft?md5=843c8c5bef096d390f0233828b8dd33a&pid=1-s2.0-S266654922200010X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81650133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Designing corrosion resistant systems with alternative cementitious materials 设计具有替代胶凝材料的耐腐蚀系统

CEMENT Pub Date : 2022-06-01 DOI: 10.1016/j.cement.2022.100029

Prasanth Alapati , Mehdi Khanzadeh Moradllo , Neal Berke , M. Tyler Ley , Kimberly E. Kurtis

{"title":"Designing corrosion resistant systems with alternative cementitious materials","authors":"Prasanth Alapati , Mehdi Khanzadeh Moradllo , Neal Berke , M. Tyler Ley , Kimberly E. Kurtis","doi":"10.1016/j.cement.2022.100029","DOIUrl":"10.1016/j.cement.2022.100029","url":null,"abstract":"<div>Alternative cementitious materials (ACMs) may exhibit superior mechanical properties and durability to certain environments, and that also may be produced with relatively less environmental impact compared to traditional portland cement. Differences in ACM composition, reaction products, and microstructure produces variations in their performance, including their resistance to fluid and ion and to corrosion of embedded steel. Understanding relationships between composition, structure, and corrosion performance in ACM systems is essential for designing durable reinforced concrete from these materials. Here, five commercially available ACMs are evaluated and compared against ordinary portland cement (OPC). The five ACMs include one calcium aluminate cement (CAC); one ternary blend of calcium aluminate, portland cement, and calcium sulfate (CACT); one calcium sulfoaluminate cement (CSA) as well as the same CSA cement with polymer-modification (CSAP); and one activated aluminosilicate binder system (AA). Water sorption, chloride ion ponding, bulk conductivity, formation factor measurements, and accelerated corrosion tests were performed to evaluate the porosity, mass transport, chloride ion binding capacity, and resistance to corrosion of embedded reinforcement. The results demonstrate that mixtures with high pore structure interconnectivity and low binding capacity (such as CSA and CAC investigated in this paper) or mixtures with significantly low binding capacity (such as AA investigated in this paper) should be avoided to minimize damage due to chloride-induced corrosion. Polymer addition could be an important strategy to improve the corrosion resistance of mixtures that have high interconnectivity. Overall, one ACM, CACT, evaluated in this study showed the best corrosion resistance among the materials considered – including OPC.</div>","PeriodicalId":100225,"journal":{"name":"CEMENT","volume":"8 ","pages":"Article 100029"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666549222000093/pdfft?md5=55043b25fb8e4900c287ff95d04fc2e4&pid=1-s2.0-S2666549222000093-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91268085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

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