Advances in Cement Research最新文献_第9页

Effect of fine aggregate on fluidity and mechanical strengths of wet shotcrete 细骨料对湿喷混凝土流动性和力学强度的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2023-01-09 DOI: 10.1680/jadcr.22.00153

Lianjun Chen, Jiahao Sun, Guoming Liu, Chunkui Li

引用次数: 0

Effect of temperature on CO2 mineralization in recycled cement paste 温度对再生水泥浆体中CO2矿化的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2023-01-09 DOI: 10.1680/jadcr.22.00129

M. Zając, M. Krol, F. Bullerjahn, J. Deja

引用次数: 3

Effect of low temperature and moisture on bond properties of PVA fibres and engineered cementitious composite matrix 低温、低温对聚乙烯醇纤维与工程胶凝复合材料粘结性能的影响

4区工程技术

Advances in Cement Research Pub Date : 2023-01-01 DOI: 10.1680/jadcr.22.00003

Shuling Gao, Qing Wang

{"title":"Effect of low temperature and moisture on bond properties of PVA fibres and engineered cementitious composite matrix","authors":"Shuling Gao, Qing Wang","doi":"10.1680/jadcr.22.00003","DOIUrl":"https://doi.org/10.1680/jadcr.22.00003","url":null,"abstract":"The chemical debonding energy, initial interfacial frictional bond strength and slip-hardening coefficient between polyvinyl alcohol (PVA) fibres and an engineered cementitious composite (ECC) matrix were obtained by means of single PVA fibre pull-out tests. The effect of three moisture states (fully saturated, semi-saturated and fully dry) on the bonding properties between the PVA fibre and ECC matrix at three target temperatures (25°C, 0°C and −20°C) was investigated. It was found that, at 25°C, the bonding properties decreased with an increase in moisture content. At 0°C and −20°C, the bonding properties increased with an increase in moisture content. At −20°C in the fully saturated state, the bonding load was too large to cause fibre rupture. The bonding properties were found to increase with decreasing temperature in the fully saturated and semi-saturated states and decrease with decreasing temperature in the fully dry state. This study of the effect of low temperature and moisture state on the bonding properties between PVA fibres and ECCs provides theoretical support for how to ensure good ductility when ECCs are in service at low temperature.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136297047","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

Expansion of concrete by secondary ettringite formation, caused by fine recycled aggregates contaminated with gypsum 再生细骨料受石膏污染，造成混凝土二次钙矾石膨胀

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-12-19 DOI: 10.1680/jadcr.22.00043

C. Colman, D. Bulteel, Bouarroudj Mohamed Elkarim, S. Rémond, L. Courard

{"title":"Expansion of concrete by secondary ettringite formation, caused by fine recycled aggregates contaminated with gypsum","authors":"C. Colman, D. Bulteel, Bouarroudj Mohamed Elkarim, S. Rémond, L. Courard","doi":"10.1680/jadcr.22.00043","DOIUrl":"https://doi.org/10.1680/jadcr.22.00043","url":null,"abstract":"Recycled aggregates, and especially the fine (0/4 mm) fraction, are often contaminated with sulfates coming from gypsum residues on the demolition site. When these aggregates are used in concrete, the sulfates can induce internal sulfate attack which causes the expansion of concrete. Standard EN206 sets the water soluble sulfate limit at 0.2 % by weight of the aggregate but other studies suggest this limit could be safely increased. In addition to the sulfate content, other parameters like the porosity and alkalinity of a mix have been seen to influence the swelling results. In this study, the different proposed sulfate limits are evaluated on concrete made with 100 % fine recycled aggregates. It is also researched whether mixing parameters could change the swelling amount regardless of sulfate content. The results showed that the incorporation of fine recycled aggregates with sulfate contents up to 0.8 mass% is safe when combined with coarse natural aggregates. If coarse recycled aggregates are used, the sulfate content of fine recycled aggregates could reach up to 0.3 %. The swelling caused by these sulfate levels was not high enough to be influenced by porosity or alkalinity.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43040791","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

Corrosion of ordinary Portland cement and metakaolin-based geopolymer immersed in nitric acid solution 普通硅酸盐水泥和偏高岭土聚合物在硝酸溶液中的腐蚀

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-11-23 DOI: 10.1680/jadcr.22.00108

Qifeng Lyu, Anguo Chen, Pengfei Dai

引用次数: 3

Properties and microstructure of blended cement containing activated iron tailings powder 含活化铁尾矿粉混合水泥的性能与微观结构

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-11-07 DOI: 10.1680/jadcr.22.00113

B. Liu, H. Meng, G. Pan, Dongxu Li

{"title":"Properties and microstructure of blended cement containing activated iron tailings powder","authors":"B. Liu, H. Meng, G. Pan, Dongxu Li","doi":"10.1680/jadcr.22.00113","DOIUrl":"https://doi.org/10.1680/jadcr.22.00113","url":null,"abstract":"To solve the hidden safety brought by iron tailings powder (ITP). The preparation of green binding materials through ITP have shown bright prospects. However, low activity limits the use of ITP as a supplementary cementitious material in large amounts. Therefore, the activity of ITP at different milling times and sintering temperatures, and its effect on the properties and microstructure of blended cement were studied. The results revealed that ITP has a filling effect and provides additional nucleation sites. In addition, ITP exhibits pozzolanic activity in the later stage, and consumes more hydration products CH, which promotes the formation and deposition of C-S-H, which are all related to its specific surface area. These also provide the conditions for cement paste densification, and lay a foundation for blended cement strength. Moreover, the environmental impact and cost of plain cement were higher than those of mixed cement. Highlights The activity of activated ITP is related to its specific surface area. ITP has a filling effect and provides additional nucleation sites. It takes a long time for iron tailings powder to exert pozzolanic activity. The activated ITP undergoes a secondary reaction to form a hydration product. The environmental impact and cost of pure cement were higher than mixed cement.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42191073","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: 1

Life Cycle Assessment and Shrinkage Properties of Sustainable Green HPMs with Eco-Friendly SWMs 可持续绿色hpm与生态友好型SWMs的生命周期评估与收缩特性

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-10-19 DOI: 10.1680/jadcr.22.00010

H. Öz, M. Güneş, H. E. Yücel, O. Ersoy, Yunus Sever, Sevgi Demirel

{"title":"Life Cycle Assessment and Shrinkage Properties of Sustainable Green HPMs with Eco-Friendly SWMs","authors":"H. Öz, M. Güneş, H. E. Yücel, O. Ersoy, Yunus Sever, Sevgi Demirel","doi":"10.1680/jadcr.22.00010","DOIUrl":"https://doi.org/10.1680/jadcr.22.00010","url":null,"abstract":"In this study, the usage of an alternative material as supplementary cementitious materials were researched for the design of high performance mortars (HPMs). For this purpose, SWMs (aspect ratio of 22:1) were produced from calcite and quartz sand. Then, SWMs were replaced with the ratios of 0, 3, 6, 9 and 12% by the cement weight to investigate the fresh, mechanical, and shrinkage properties of HPMs. Test results showed that the mechanical and shrinkage properties of HPMs had an improvement up to 9% of SWMs due to its special particle characteristics. The compressive strength, flexural strength, modulus of elasticity, fracture toughness and fracture energy of HPM incorporating 9% of SWM was higher than that of the control mixture by 8.8-9.1%, 7.5-9.9%, 4.7-6.7%, 8.9-4.6% and 13.2-2.5% at 28-90 days, respectively. Similarly, these ratios for maximum drying shrinkage and average crack width were determined as 10.5% and 58.3%, respectively, at the end of 60 days. These findings were also supported by SEM/EDX and TGA/DTA. Moreover, the potential environmental impacts resulting from the production of 1 kg SWM and HPM incorporating 9% SWM were evaluated using the life cycle analysis software (LCA) SimaPro 8.5.0.0. Based on the LCA results, SWMs with acicular particle structure can be used as an alternative material to develop sustainable concrete structures.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42509051","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

Acid Resistance of Alkali Activated Composites Containing Waste Glass Fine Aggregate 含废玻璃细骨料的碱活性复合材料的耐酸性

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-10-19 DOI: 10.1680/jadcr.21.00022

Md. Nabi Newaz Khan, Manjur A Elahi, Jhutan Chandra Kuri, P. Sarker, Faiz Shaikh

{"title":"Acid Resistance of Alkali Activated Composites Containing Waste Glass Fine Aggregate","authors":"Md. Nabi Newaz Khan, Manjur A Elahi, Jhutan Chandra Kuri, P. Sarker, Faiz Shaikh","doi":"10.1680/jadcr.21.00022","DOIUrl":"https://doi.org/10.1680/jadcr.21.00022","url":null,"abstract":"This study examined the efficacy of waste glass cullet as a substitute materials to natural fine aggregate in alkali activated composites when exposed to H2SO4 and HCl acid solutions for one year. The changes in physical appearance, surface alkalinity, mass, mechanical strength and microstructure of the hardened samples before and after immersion in acid solutions were investigated. The findings of the experimental work indicated that the physical, mechanical and microstructural damages of the specimens due to acid attacks increased with the rise of glass aggregate percentages. This is attributed to the smooth surface texture and angularity of the glass cullet which affected the bond with the damaged paste matrix at the interfacial transition zone (ITZ) and increased the porosity. However, the acid resistance performance of the mortars containing up to 50% glass aggregate was found satisfactory when compared with the mortar without glass fine aggregate. Therefore, the use of waste glass cullet as a partial replacement of natural sand by up to 50% is considered feasible in alkali activated systems against acid exposures.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45554590","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

Study on Early Hydration Behavior and Mechanical Properties of Basic Magnesium Sulfate Cement Using Electrodeless Resistivity Measurements 无电极电阻率法研究碱性硫酸镁水泥早期水化行为及力学性能

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-10-14 DOI: 10.1680/jadcr.22.00031

Shu-hui Lei, Dongdong Zhou, Li Fang, Qiaozhen Yang, F. Cheng

{"title":"Study on Early Hydration Behavior and Mechanical Properties of Basic Magnesium Sulfate Cement Using Electrodeless Resistivity Measurements","authors":"Shu-hui Lei, Dongdong Zhou, Li Fang, Qiaozhen Yang, F. Cheng","doi":"10.1680/jadcr.22.00031","DOIUrl":"https://doi.org/10.1680/jadcr.22.00031","url":null,"abstract":"The effect of early hydration behavior on the long-term performance of cement is profound, but its study is lacking. The early hydration behavior and mechanical properties of basic magnesium sulfate (BMS) cement were investigated by using electrodeless resistivity test combined with compressive strength measurement, XRD, SEM and Mercury intrusion porosimetry (MIP). As a result, the early hydration process of BMS cement can be clearly divided into three stages including induction period, acceleration period and deceleration period according to the resistivity variation curve. A linear correlation between the resistivity and setting time of BMS cement is established. Thus the initial setting time and final setting time of BMS cement can be estimated using feature point A (the time that the growth rate of resistivity starts rising) and feature point B (the time for the maximum growth rate of resistivity) on the differential curve of electrical resistivity, respectively. Moreover, a linear fitting equation between the resistivity (24 h) and compressive strength of BMS cement curing for 28 d is determined. The correlation coefficient is as high as 0.9979. Using the fitted linear equation, the long-term strength (28 d) of BMS cement can be precisely predicted by the measured resistivity (24 h). This study provides us a feasible, accurate and in situ method for understanding the early hydration behavior and quality monitoring of BMS cement.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49506798","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

Synthesis of Modified Polycarboxylate Superplasticizer and Effect on Properties of Cement 改性聚羧酸系高效减水剂的合成及其对水泥性能的影响

IF 2 4区工程技术

Advances in Cement Research Pub Date : 2022-10-10 DOI: 10.1680/jadcr.21.00212

Xiaoyu Zhang, W. Zhen, S. Guan, Junliang Chen

{"title":"Synthesis of Modified Polycarboxylate Superplasticizer and Effect on Properties of Cement","authors":"Xiaoyu Zhang, W. Zhen, S. Guan, Junliang Chen","doi":"10.1680/jadcr.21.00212","DOIUrl":"https://doi.org/10.1680/jadcr.21.00212","url":null,"abstract":"In this work, polyether, acrylic acid and oleic acid were used as raw materials to synthesize oleic acid modified polycarboxylate superplasticizer (OA-PCE) by emulsion polymerization, and the synthesis process was optimized by orthogonal experiment. The colloidal interfacial chemistry results concluded that OA-PCE was more capable of reducing the surface tension of aqueous solutions than unmodified traditional polycarboxylate superplasticizer (JS-PCE), and the adsorption capacity on cement particles was more significant. The isothermal adsorption behavior of two kinds of polycarboxylate superplasticizers on cement conformed to the Freundlich isothermal adsorption equation, and it was a physical adsorption process by electrostatic action. The effect of the OA-PCE dosage on the flowability of cement slurry was preliminarily investigated by rheological behavior testing, according to the yield stress, plastic viscosity and thixotropic ring area of slurry, which showed that 0.35 wt% addition of OA-PCE in cement had the optimum effect. The mechanical properties results showed that the compressive strength values of concrete with OA-PCE (0.35 wt%) at 4 h and 7 d were 117.1% and 88.3% higher than those of control group, respectively, which all met the standards for the use of concrete in metro pipe sheets. Therefore, OA-PCE synthesized by emulsion polymerization had certain significance for the development of polycarboxylate superplasticizer both in terms of polymerization methods and practical applications.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43067402","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