Cement & concrete composites最新文献

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Semi-wet CO2 mineralized modified wollastonite: Application in high-early strength cement and comparative analysis with common supplementary cementitious materials 半湿型CO2矿化改性硅灰石:在高早强水泥中的应用及与常用补充胶凝材料的对比分析
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-24 DOI: 10.1016/j.cemconcomp.2025.106254
Yi-Sheng Wang , RunSheng Lin , Xiao-Yong Wang
{"title":"Semi-wet CO2 mineralized modified wollastonite: Application in high-early strength cement and comparative analysis with common supplementary cementitious materials","authors":"Yi-Sheng Wang ,&nbsp;RunSheng Lin ,&nbsp;Xiao-Yong Wang","doi":"10.1016/j.cemconcomp.2025.106254","DOIUrl":"10.1016/j.cemconcomp.2025.106254","url":null,"abstract":"<div><div>Mineral carbonation technology is widely recognized as an effective approach for mitigating global warming. This study proposes a semi-wet CO<sub>2</sub> mineralization method to modify wollastonite (WS) and successfully synthesizes a reactive cementitious material—carbonated wollastonite (CWS)—that is rich in carbonate and amorphous SiO<sub>2</sub>. This innovative method not only imparts significant pozzolanic activity to the CWS but also enables efficient CO<sub>2</sub> sequestration. This study systematically outlines the CWS preparation process and investigates its influence on the hydration characteristics, microstructural evolution, and performance development of a high-early strength cement (HEC) system. Additionally, a comparative analysis with slag and fly ash is conducted. The results of this study revealed that CWS exhibited a slight hydration inhibition effect in the early stage, which gradually diminished over time. After 28 days, the strength of the CWS system surpassed that of pure HEC, and its resistivity increased by 79.3 %, significantly exceeding the 24.1 % improvement observed in the slag system. CWS not only exhibits pozzolanic activity but also interacts synergistically with the aluminum phase. Its ability to consume calcium hydroxide and generate hydration products surpasses that of slag and fly ash, effectively reducing the total pore volume to a level comparable to that of the pure HEC system. In addition, the unique preparation process of CWS shows an excellent CO<sub>2</sub> sequestration potential of 285.5 g CO<sub>2</sub>/kg. This method not only offers an effective solution to mitigate the current shortage of SCMs but also provides a sustainable approach for the construction industry, combining high performance with low carbon emissions.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106254"},"PeriodicalIF":10.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144701763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
MgO-metakaolin cementitious materials: hydration, properties and microstructure 镁偏高岭土胶凝材料:水化、性能及微观结构
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-24 DOI: 10.1016/j.cemconcomp.2025.106256
Yongshan Tan , Xiangyi Cheng , Caijun Shi
{"title":"MgO-metakaolin cementitious materials: hydration, properties and microstructure","authors":"Yongshan Tan ,&nbsp;Xiangyi Cheng ,&nbsp;Caijun Shi","doi":"10.1016/j.cemconcomp.2025.106256","DOIUrl":"10.1016/j.cemconcomp.2025.106256","url":null,"abstract":"<div><div>MgO-metakaolin (MK) systems is a novel magnesium-based cementitious material that is a potential candidate for the solidification and encapsulation of radioactive waste. This study investigates the effects of the MgO/MK mass ratio, water-to-binder ratio, and curing age on the hydration, properties and microstructure of MgO-MK cementitious materials. The results suggest that increasing the MgO/MK mass ratio caused an enhancement in the compressive strength and flowability of MgO-MK cementitious materials and significantly reduced the total heat release of the MgO-MK system. The main hydration products found in the microstructure of the MgO-MK systems are brucite, hydrotalcite, and magnesium (aluminum) silicate hydrate gel (M-(A-)S-H), with the amorphous M-(A-)S-H gel being the primary hydration product. The amount of hydration products increased with an increase in the MgO content. Further, a significant reduction in the porosity of the samples were observed with an increase in the MgO/MK mass ratio resulting in a dense microstructure.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106256"},"PeriodicalIF":10.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Breaking strength-ductility trade-off dilemma for Engineered Cementitious Composites (ECC) through filler effect 基于填料效应的工程胶凝复合材料(ECC)断裂强度-延性权衡困境
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-23 DOI: 10.1016/j.cemconcomp.2025.106248
Junsheng Li , Victor C. Li , Duo Zhang
{"title":"Breaking strength-ductility trade-off dilemma for Engineered Cementitious Composites (ECC) through filler effect","authors":"Junsheng Li ,&nbsp;Victor C. Li ,&nbsp;Duo Zhang","doi":"10.1016/j.cemconcomp.2025.106248","DOIUrl":"10.1016/j.cemconcomp.2025.106248","url":null,"abstract":"<div><div>The outstanding strain-hardening and multiple cracking behavior of Engineered Cementitious Composites (ECC) is favored by maintaining a low fracture toughness (<em>K</em><sub>m</sub>) in its matrix. However, limiting <em>K</em><sub>m</sub> comes at the cost of diminished compressive strength (<em>f</em><sub>c</sub>), owing to their intrinsic positive correlation in general cementitious binders. Here, we explore the feasibility of decoupling the <em>K</em><sub>m</sub>-<em>f</em><sub>c</sub> relationship by applying the filler effect, aiming to improve the composite <em>f</em><sub>c</sub> and tensile ductility simultaneously. Our results show that <em>K</em><sub>m</sub> and <em>f</em><sub>c</sub> can be adjusted independently by manipulating the use of fillers with different cementitious reactivities, and incorporating the inert-particle-packing effect produced a densified matrix with increased <em>f</em><sub>c</sub> but nearly unchanged <em>K</em><sub>m</sub>. Micromechanical analyses revealed favorable changes in the fiber/matrix interfacial bond and pseudo-strain-hardening index, accompanied by an improved tensile strength, ductility, and crack control capability in the composite. These findings inform a cost-effective design strategy for ECC across wide-ranging applications.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106248"},"PeriodicalIF":10.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Reaction kinetics and microstructure evolution of tuff-based geopolymers with feature properties 特征性质凝灰岩型地聚合物的反应动力学与微观结构演化
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-23 DOI: 10.1016/j.cemconcomp.2025.106249
Cheng Shi , Kequan Yu , Chaowei Zheng , Dongyu Wang , Jun Zhao , Chenglong Cai , Anming She , Zuhua Zhang
{"title":"Reaction kinetics and microstructure evolution of tuff-based geopolymers with feature properties","authors":"Cheng Shi ,&nbsp;Kequan Yu ,&nbsp;Chaowei Zheng ,&nbsp;Dongyu Wang ,&nbsp;Jun Zhao ,&nbsp;Chenglong Cai ,&nbsp;Anming She ,&nbsp;Zuhua Zhang","doi":"10.1016/j.cemconcomp.2025.106249","DOIUrl":"10.1016/j.cemconcomp.2025.106249","url":null,"abstract":"<div><div>This work proposes a multi-scale composition design strategy to investigate reaction kinetics, microstructure control, and performance optimization of tuff-based geopolymers in both high- and low-calcium systems. We evaluated the leaching of Al and Si from tuff in alkaline solutions, employing in-situ Raman mapping spectroscopy to track phase structure transitions during leaching. The reaction process of tuff-based geopolymers was assessed using <sup>1</sup>H low-field NMR and ICC. Notably, high-calcium systems showed excellent workability (flowability and setting time) and compressive strength, while low-calcium systems exhibited superior flexural strength. Microstructure characterization via SEM-EDS, XRD, MIP, and TGA elucidated the mechanisms underlying physical property changes. <em>In-situ</em> FTIR further revealed reaction mechanisms and stability within the geopolymer matrix. For high calcium system, some gel nucleus part occurs in the solution with the other part using GGBS and tuff as crystallization nucleus to generate C(N)-A-S-H gels on the surface. For low calcium system, three-dimensional amorphous network structures of N-A-S-(H) gels become the main products, and the tuff particles as crystallization nucleus become the main structure aggregate. This composition design strategy offers valuable insights for the diversified design of tuff-based geopolymers.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106249"},"PeriodicalIF":10.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Influence of seawater on the microstructure of calcium-silicate-hydrate (C-S-H) gels with varying Ca/Si ratios based on alite-silicon dioxide system 海水对钙硅水合物(C-S-H)凝胶微观结构的影响
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-23 DOI: 10.1016/j.cemconcomp.2025.106251
Yangyang Zhang , Shengwei Cao , Jun Chang , Siqi Ding , Qingxin Zhao , Chi Sun Poon
{"title":"Influence of seawater on the microstructure of calcium-silicate-hydrate (C-S-H) gels with varying Ca/Si ratios based on alite-silicon dioxide system","authors":"Yangyang Zhang ,&nbsp;Shengwei Cao ,&nbsp;Jun Chang ,&nbsp;Siqi Ding ,&nbsp;Qingxin Zhao ,&nbsp;Chi Sun Poon","doi":"10.1016/j.cemconcomp.2025.106251","DOIUrl":"10.1016/j.cemconcomp.2025.106251","url":null,"abstract":"<div><div>Seawater sea-sand concrete has emerged as a promising sustainable construction material, leveraging abundant marine resources to mitigate freshwater dependency and address global sand scarcity while offering economic and ecological advantages. Despite its potential, the hydration mechanisms governing ordinary Portland cement (OPC) blended with supplementary cementitious materials (SCMs) in seawater remain unresolved, impeding predictions of long-term durability. This study investigated the influence of seawater on the alite (C<sub>3</sub>S, the primary clinker in OPC)-silicon dioxide (SiO<sub>2</sub>, the main composition of SCMs) hydration system, employed as a simplified model for OPC and SCMs, with a particular emphasis on hydration kinetics, hydration products, and the microstructural evolution of calcium-silicate-hydrate (C-S-H) gels with varying calcium-to-silicon (Ca/Si) ratios. Comparative analyses of specimens mixed with seawater or deionized water for 1 and 28 days revealed that seawater significantly accelerated the hydration rate of C<sub>3</sub>S-SiO<sub>2</sub> system, an effect amplified by the incorporation of silica and sustained throughout hydration. Hydration in seawater led to the formation of unique products, including sodium chloride and gypsum, with increased silica content enhancing their amounts. Furthermore, seawater exposure altered the C-S-H gel microstructure, enhancing the overall amount. However, higher silica contents (lower Ca/Si ratios) promoted an increased adsorption of sodium and chloride ions, and consequently decreased the mean molecular chain length and polymerization degree of C-S-H. The high silica content also degraded the micromechanical properties, which was reflected by the shifts towards lower-density C-S-H and a greater decrease in average modulus in the seawater system compared to the deionized water system.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106251"},"PeriodicalIF":10.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Multi-scale characterization of the 3D printed concrete strength considering the full grade pore structure 考虑全级孔隙结构的3D打印混凝土强度多尺度表征
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-22 DOI: 10.1016/j.cemconcomp.2025.106246
Jianzhuang Xiao , Zhenyuan Lv , Zhenhua Duan , Chuanzeng Zhang
{"title":"Multi-scale characterization of the 3D printed concrete strength considering the full grade pore structure","authors":"Jianzhuang Xiao ,&nbsp;Zhenyuan Lv ,&nbsp;Zhenhua Duan ,&nbsp;Chuanzeng Zhang","doi":"10.1016/j.cemconcomp.2025.106246","DOIUrl":"10.1016/j.cemconcomp.2025.106246","url":null,"abstract":"<div><div>The macro-mechanical characteristics of 3D printed concrete (3DPC) are impacted by the porous interfaces from both filaments and interlayers. Under the consideration of a full pore size characterization, the variations on pore size-volume are investigated in the spatial distribution of the micro-, meso-, and macro-scales. The introduced pores affect the distribution density and geometric characteristics of hydrated pores. An active regulation of introduced and hydrated pores after hardening is achieved by microbial healing method, which affects the spatial distribution of the gel pores, capillaries and printed voids. The results indicate that the anisotropic compressive strength of concrete is correlated with distribution and number of pores in a size range between 20 nm and 3mm. A pore-strength model for 3DPC is developed and analyzed based on <em>Powers</em> theory, to simulate the effects of spatial distribution in stacked interfaces. In addition, the 3DPC constitutive stress-strain relationship with three mixing ratios considering the pore shapes and spatial distributions are established and evaluated.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106246"},"PeriodicalIF":10.8,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144684619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
An innovative strategy of exploring high-strength engineered cementitious composites to solve the strength-ductility dilemma of UHPC structures 探索高强工程胶凝复合材料解决超高性能混凝土结构强度-延性困境的创新策略
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-20 DOI: 10.1016/j.cemconcomp.2025.106247
Zhi Zhang , Yao Ding , Ling-zhi Li , Nauman Ahmad , Ajad Shrestha , Victor Li , Kequan Yu
{"title":"An innovative strategy of exploring high-strength engineered cementitious composites to solve the strength-ductility dilemma of UHPC structures","authors":"Zhi Zhang ,&nbsp;Yao Ding ,&nbsp;Ling-zhi Li ,&nbsp;Nauman Ahmad ,&nbsp;Ajad Shrestha ,&nbsp;Victor Li ,&nbsp;Kequan Yu","doi":"10.1016/j.cemconcomp.2025.106247","DOIUrl":"10.1016/j.cemconcomp.2025.106247","url":null,"abstract":"<div><div>Ultra-high-performance concrete (UHPC) featuring high compressive and tensile strength could significantly enhance the load capacity of UHPC structures. However, due to the apparently inferior strain capacity of UHPC compared to that of steel bar, the deformation capacity of UHPC structures is substantially lower even than that of conventional reinforced concrete structures, leading to a strength-ductility dilemma for these kinds of structures. High-strength engineered cementitious composite (HS-ECC), combining the excellent tensile behavior of ECC (especially the tensile strain capacity) and the compressive performance of UHPC, could work compatibly with steel bars for the whole loading process preventing crack localization. This enhances both load and deformation capacity of HS-ECC structure. HS-ECC beams exhibited superior ductility and load capacity than those of UHPC beams with reinforcement ratio within 3.6 % in this research. When the reinforcement ratio was 1.3 %, the ductility index of HS-ECC exceeded that of UHPC 402.5 %. A theoretical model based on the layered section method was further proposed, accurately predicting the load-midspan deflection curves of HS-ECC beams. Analysis revealed that the contribution of HS-ECC to flexural strength of HS-ECC beams decreased significantly with increasing reinforcement ratio. The requirement of HS-ECC tensile strain capacity decreased, while the requirement of HS-ECC compressive strain capacity increased with increasing reinforcement ratio. Finally, a performance-based design method considering the compressive-zone depth as the indicator was proposed, which can balance the strength and ductility of HS-ECC beams, as well as increase the utilization ratio of HS-ECC. This research lay the ground for the design and practical application of reinforced HS-ECC beam.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106247"},"PeriodicalIF":10.8,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144664579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Photocatalytic cementitious composites: enhanced air purification performance by BOF slag addition 光催化胶凝复合材料:添加转炉炉渣增强空气净化性能
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-16 DOI: 10.1016/j.cemconcomp.2025.106244
Daoru Liu , J.C.O. Zepper , Koh Chuen Hon , Yuxuan Chen , Qingliang Yu
{"title":"Photocatalytic cementitious composites: enhanced air purification performance by BOF slag addition","authors":"Daoru Liu ,&nbsp;J.C.O. Zepper ,&nbsp;Koh Chuen Hon ,&nbsp;Yuxuan Chen ,&nbsp;Qingliang Yu","doi":"10.1016/j.cemconcomp.2025.106244","DOIUrl":"10.1016/j.cemconcomp.2025.106244","url":null,"abstract":"<div><div>This paper investigates the utilization of BOF slag as a cementitious support for photocatalytic nitrogen oxides abatement, presenting an exploratory study on its potential to address environmental concerns. The phase composition of BOF slag-based mortars is studied using XRD, FTIR, and TGA, while binding energy and microstructure are investigated with XPS and MIP, respectively. The photocatalytic NO<sub>x</sub> degradation properties of as-prepared mortars are characterized. The BOF slag-based mortar without TiO<sub>2</sub> addition exhibits a %Conversion of about 10 % and a %Selectivity of 97 %. Furthermore, the BOF slag-based mortar demonstrates better photocatalytic properties than the OPC-based mortar when the same amount (5 wt%) of TiO<sub>2</sub> photocatalyst is used. The addition of quartz insignificantly affects the %Conversion but significantly lowers the %Selectivity. These findings underscore the potential of BOF slag as a promising alternative support material for photocatalytic NO<sub>x</sub> abatement, offering insights into its application in sustainable environmental remediation strategies. The limitations of this study are revealed, and future research directions are proposed.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106244"},"PeriodicalIF":10.8,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144640666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Effect of SCM and superplasticizer on excessive paste thickness and properties of concrete SCM和高效减水剂对混凝土过厚及性能的影响
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-15 DOI: 10.1016/j.cemconcomp.2025.106233
Zhen Jiang , Yizhong Mao , Dengwu Jiao , Xiang Hu , Muhammad Talha Ghafoor , Caijun Shi
{"title":"Effect of SCM and superplasticizer on excessive paste thickness and properties of concrete","authors":"Zhen Jiang ,&nbsp;Yizhong Mao ,&nbsp;Dengwu Jiao ,&nbsp;Xiang Hu ,&nbsp;Muhammad Talha Ghafoor ,&nbsp;Caijun Shi","doi":"10.1016/j.cemconcomp.2025.106233","DOIUrl":"10.1016/j.cemconcomp.2025.106233","url":null,"abstract":"<div><div>The optimum mix design considering fresh and hardened mechanical properties is of great significance for the quality of construction materials. This study mainly examines the influence of excessive paste thickness based on the variation of supplementary cementitious materials (SCMs) and superplasticizer content on the mechanical properties of high-performance concrete (HPC). The test results exhibited the significance of excessive paste thickness on slump flowability and flow retention even without a superplasticizer. The yield stress of HPC was mainly influenced by the presence of a superplasticizer, however, plastic viscosity was primarily dependent on the excessive paste thickness. The test results exhibited that the presence of fly ash slightly improves the rheological properties of HPC, however, its trend depends on the presence of a superplasticizer. The excessive paste thickness has a positive impact on the strength development of HPC up to an optimal point indicating the significance of paste thickness as well as superplasticizer. A slight reduction in compressive strength was observed with the replacement of cement with fly ash, however, a positive impact based on the presence of slag was observed. No significant effect of excessive paste thickness on various environmental factors such as abrasion, chloride penetration, and carbonation of HPC was examined.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106233"},"PeriodicalIF":10.8,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144630033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
Synergistic effects of preheated polyethylene terephthalate yarns and nano-carbon black particles on the mortar high-temperature performance 预热聚对苯二甲酸乙酯纱线与纳米炭黑颗粒对砂浆高温性能的协同作用
IF 10.8 1区 工程技术
Cement & concrete composites Pub Date : 2025-07-15 DOI: 10.1016/j.cemconcomp.2025.106243
Zi Jian Wang , Zheng Hui Phua , Wei Ping Chan , Grzegorz Lisak
{"title":"Synergistic effects of preheated polyethylene terephthalate yarns and nano-carbon black particles on the mortar high-temperature performance","authors":"Zi Jian Wang ,&nbsp;Zheng Hui Phua ,&nbsp;Wei Ping Chan ,&nbsp;Grzegorz Lisak","doi":"10.1016/j.cemconcomp.2025.106243","DOIUrl":"10.1016/j.cemconcomp.2025.106243","url":null,"abstract":"<div><div>The effects of nano-carbon black (NCB) and two types of polyethylene terephthalate (PET) yarns, the general yarn (YPET) and the modified material with heat treatment (H-YPET), are investigated in regard to the initial and residual mechanical properties of mortar at various temperatures. The combination of YPETs and NCB in mortar mitigates the agglomeration effect of NCB and the weak compressive performance of YPET fibre-reinforced mortars (FRM). Meanwhile, preheating alters the surface properties of H-YPETs, improving the strength and thermal stability of mortars. YPET FRMs with NCB present superior mechanical properties at ambient temperature, improving flexural strength (FS) by 44.8 % (7 days) and 43.2 % (28 days), respectively, while demonstrating comparable compressive strength (CS) to the control before and after high temperature exposures. H-YPET FRM (without NCB) present superior thermal durability, enhancing FS by 19.5 % at 28 days, residual flexural strength after 250 °C heating by 2.7 %, residual compressive strength after 250 °C and 400 °C by 8.9 % and 15.8 %, respectively, while demonstrating comparable CS to the control at ambient temperatures. This study provides two novel and promising mortar materials with outstanding mechanical properties and thermal stabilities, contributing interesting and useful insights towards sustainable building materials with the potentials to possess different functionalities.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"164 ","pages":"Article 106243"},"PeriodicalIF":10.8,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144630163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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
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