Construction and Building Materials最新文献_第7页

Styrofoam Housing System (SHS) – Prefabricated modular unit made of polystyrene and laminate of glass fibres embedded in epoxy resin used as a building material in temporary shelter. Preliminary evaluation of mechanical properties 泡沫聚苯乙烯住房系统(SHS) -预制模块化单元，由聚苯乙烯和嵌在环氧树脂中的玻璃纤维层压制成，用作临时住所的建筑材料。机械性能的初步评估

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-23 DOI: 10.1016/j.conbuildmat.2026.145693

Anna Karolak , Paweł Niewiadomski , Filip Grzymski , Artur Jörgen , Daria Pawłosik , Jerzy Łątka , Yasunori Harano

In response to global crises, wars, and natural disasters, the concept of the ‘SHS’ (Styrofoam Housing System) transitional house was developed. The project is based on the creation of a modular unit that is inexpensive, easy, and quick to manufacture and assemble due to the use of lightweight composite panels. SHS utilizes interconnected prefabricated modular panels comprising a polystyrene core faced with a laminate layer (glass fibre cloth and epoxy resin). This article presents the results of preliminary tests of the basic mechanical properties of the composite with the aim of evaluating the possibility of its use as building partitions. Axial compression and four-point bending tests were conducted on small samples alongside bending tests on full-scale models, which constitute modular elements of the transition house. The influence of the number and location of laminate layers on its static performance was analysed. In the tests on small samples, the Digital Image Correlation (DIC) method was also employed. The tests on large models allowed for the estimation of the load-bearing capacity and stiffness of the modular elements. The obtained results indicate that the SHS panels meet the ULS and SLS criteria. Finally, based on the conducted tests and analyses, the design and erection were successfully completed.

为了应对全球危机、战争和自然灾害，“SHS”（泡沫聚苯乙烯住房系统）过渡住宅的概念被开发出来。该项目基于模块化单元的创建，由于使用了轻质复合面板，该单元价格低廉，易于制造和组装。SHS采用相互连接的预制模块化面板，包括聚苯乙烯芯，表面是层压层（玻璃纤维布和环氧树脂）。本文介绍了复合材料基本力学性能的初步测试结果，目的是评估其作为建筑隔板的可能性。在小样本上进行轴压和四点弯曲试验，同时在全尺寸模型上进行弯曲试验，这些模型构成了过渡房屋的模块化元素。分析了层数和层位对其静力性能的影响。在小样本测试中，还采用了数字图像相关（DIC）方法。在大型模型上进行的试验允许对模块元件的承载能力和刚度进行估计。结果表明，SHS面板满足ULS和SLS标准。最后，根据所进行的测试和分析，成功地完成了设计和安装。

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引用次数: 0

Dynamic fracture mechanism and damage constitutive model of LF-LAMOC under water-to-binder ratio regulation 水胶比调节下LF-LAMOC动态断裂机理及损伤本构模型

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-21 DOI: 10.1016/j.conbuildmat.2026.145687

Shuren Wang , Chaojin Cheng , Jian Gong , Zihao Song

Limestone powder-lightweight aggregate magnesium oxychloride concrete (LF-LAMOC) is a novel green building material. To investigate its dynamic mechanical properties, electromagnetic-driven split Hopkinson pressure bar techniques were employed to test LF-LAMOC specimens with varying water-to-binder ratios under impact loading. High-speed photography and digital image correlation methods were utilized to reveal the dynamic compressive and tensile fracture behaviors of LF-LAMOC. Scanning electron microscopy was applied to observe the thickness variation of the interfacial transition zone (ITZ) between magnesium oxychloride cement paste and lightweight aggregates as a function of water-to-binder ratio. Results show that LF-LAMOC exhibits significant strain-rate sensitivity in dynamic compressive/tensile strength and energy dissipation. At low impact velocities, energy dissipation is dominated by plastic and inertial energy, while energy consumed by inter-particle fracture damage is relatively minor. Under low strain rates, dynamic compressive failure of LF-LAMOC specimens manifests as splitting failure primarily caused by tensile stress. For dynamic tensile loading, cracking in disk specimens originates from the center. At high strain rates, failure transitions to pulverization, driven by combined tensile and shear stresses, with cracking initiating from both ends of the disk. Limestone powder effectively enhances the bond strength between aggregates and paste, while ITZ thickness increases with rising water-to-binder ratio. A modified Zhu-Wang-Tang dynamic constitutive model incorporating material damage was developed to derive the dynamic constitutive equation for LF-LAMOC, which demonstrates favorable predictive capability for the material’s dynamic stress-strain relationships. The conclusions obtained in this study provide valuable references for the engineering applications of LF-LAMOC.

石灰石粉轻骨料氯化镁混凝土（LF-LAMOC）是一种新型的绿色建筑材料。为了研究其动态力学性能，采用电磁驱动分离式霍普金森压杆技术对冲击载荷下不同水胶比的LF-LAMOC试样进行了测试。采用高速摄影和数字图像相关方法揭示了LF-LAMOC的动态压缩和拉伸断裂行为。采用扫描电镜观察了氯氧镁水泥浆体与轻骨料界面过渡区厚度随水胶比的变化规律。结果表明，LF-LAMOC在动态抗压/拉伸强度和能量耗散方面具有显著的应变率敏感性。在低冲击速度下，能量耗散以塑性能和惯性能为主，颗粒间断裂损伤消耗的能量相对较小。在低应变率下，LF-LAMOC试件的动态压缩破坏表现为主要由拉应力引起的劈裂破坏。在动态拉伸加载下，盘状试件的开裂主要来自于中心。在高应变率下，在拉伸和剪切联合应力的驱动下，破坏转变为粉碎，从圆盘的两端开始开裂。石灰石粉有效提高了骨料与膏体的粘结强度，随着水胶比的升高，ITZ厚度增加。建立了考虑材料损伤的改进的Zhu-Wang-Tang动态本构模型，导出了LF-LAMOC的动态本构方程，该模型对材料的动态应力-应变关系具有较好的预测能力。所得结论为LF-LAMOC的工程应用提供了有价值的参考。

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引用次数: 0

Shear load-slip behavior of PBL connectors embedded in UHTCC 嵌入在UHTCC中的PBL连接器的剪切荷载-滑移行为

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-21 DOI: 10.1016/j.conbuildmat.2026.145717

Sheng-Jie Duan , Yun-Long Chen , Rui-Ze Zhang , Quan-Biao Xu , Jing-Zhong Tong

Ultra-high toughness cementitious composite (UHTCC), renowned for its superior tensile performance and crack resistance, offers a promising alternative to normal concrete (NC) in steel-concrete composite structures. This study investigated the shear load-slip behavior of Perfobond Leiste (PBL) connectors embedded in UHTCC through experimental, numerical, and theoretical approaches. A total of 14 push-out tests were conducted to examine the effects of geometric parameters. Experimental results reveal that UHTCC significantly enhances the deformation capacity of the connectors, with the ultimate slip of UHTCC-encased specimens being 7.6 times that of NC specimens. Quantitative analysis of the group hole effect indicates that the average per-hole shear capacity and initial stiffness in double- and triple-hole connectors are reduced to approximately 80 % and 65 %, respectively, compared to single-hole connectors. Finite element models validated against experimental data enabled extended parametric studies. Based on the results, a theoretical model for shear capacity was developed. A critical hole spacing of 4.65 times the hole diameter was identified, beyond which the group hole effect becomes negligible. Furthermore, a calculation formula for initial shear stiffness was derived using elastic foundation beam theory, effectively capturing the synergistic dowel action between the penetrating rebar and the UHTCC. Validation confirms that the proposed capacity and load-slip models exhibit high predictive accuracy. These findings provide a robust theoretical basis and design guidance for the implementation of PBL connectors in steel-UHTCC composite structures.

超高韧性胶凝复合材料（UHTCC）以其优异的拉伸性能和抗裂性而闻名，是钢-混凝土复合结构中普通混凝土（NC）的一个有希望的替代品。本研究通过实验、数值和理论方法研究了嵌入在UHTCC中的Perfobond Leiste （PBL）连接器的剪切-滑移行为。共进行了14次推出试验，以检验几何参数的影响。试验结果表明，超高压混凝土显著提高了接头的变形能力，超高压混凝土包覆试件的极限滑移量是NC试件的7.6倍。群孔效应的定量分析表明，与单孔连接器相比，双孔和三孔连接器的平均单孔剪切能力和初始刚度分别降低至约80 %和65 %。根据实验数据验证的有限元模型使扩展参数研究成为可能。在此基础上，建立了抗剪承载力的理论模型。确定了4.65倍孔径的临界孔距，超过该临界值，群孔效应可以忽略不计。利用弹性基础梁理论推导了初始抗剪刚度的计算公式，有效地反映了贯通钢筋与UHTCC之间的协同钉入作用。验证证实了所提出的容量和负载滑移模型具有较高的预测精度。这些研究结果为在钢-超高压混凝土复合结构中实现PBL连接器提供了坚实的理论基础和设计指导。

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引用次数: 0

Mechanical and durability properties of hybrid fiber-reinforced phase change concrete: Synergistic mechanisms and performance enhancement 混杂纤维增强相变混凝土的力学和耐久性：协同机制和性能增强

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-23 DOI: 10.1016/j.conbuildmat.2026.145692

Fang He , Yazhen Sun , Baiquan Fu , Weiyi Tang , Jinchang Wang

To address the high brittleness, low tensile strength, and insufficient durability of traditional concrete under environmental variations, this study proposes a novel approach using hybrid fibers and phase change materials (PCM) for composite modification. The mechanical and durability properties of hybrid fiber-reinforced phase change concrete (HFRPCC) were systematically investigated, with microstructure analyzed via SEM and MIP to elucidate the synergistic mechanisms between fibers and PCM. Results indicate that while PCM reduces mechanical properties, the incorporation of hybrid fibers effectively offsets this negative effect. With 4 % PCM (P4CC), the frost resistance was significantly enhanced, showing only 3.43 % mass loss after 200 freeze-thaw cycles. HFRP4CC (with 4 % PCM) exhibited a 38.5 % reduction in mass loss and an 8.3 % increase in relative dynamic elastic modulus compared to hybrid fiber-reinforced concrete (HFRC), demonstrating superior freeze-thaw resistance. Nano-SiO₂ from the PCM carrier refined the pore structure, while hybrid fibers promoted C-S-H gel formation and enhanced interfacial bonding, synergistically mitigating frost damage. The fiber network also restrained PCM-induced pores and optimized pore distribution, reducing penetration depth and relative permeability coefficient by 9.5 % and 25 %, respectively, compared to HFRC. Although PCM slightly increased electrical flux, the porosity-filling and ion-blocking effects of fibers maintained HFRPCC’s impermeability advantages. After 100 thermal cycles, the mechanical properties exhibit a decrease of less than 3 %, demonstrating good stability under phase-change cycling. The developed HFRPCC combines thermal regulation and structural optimization, significantly improving mechanical properties, freeze-thaw resistance, and impermeability, offering a high-performance solution for concrete engineering in extreme environments.

为了解决传统混凝土在环境变化下的高脆性、低抗拉强度和耐久性不足的问题，本研究提出了一种使用混杂纤维和相变材料（PCM）进行复合改性的新方法。系统研究了混杂纤维增强相变混凝土（HFRPCC）的力学性能和耐久性，并通过SEM和MIP对其微观结构进行了分析，以阐明纤维与相变混凝土的协同作用机制。结果表明，虽然PCM降低了机械性能，但混杂纤维的掺入有效地抵消了这种负面影响。当PCM （P4CC）为4 %时，抗冻性显著增强，200次冻融循环后的质量损失仅为3.43 %。与混合纤维增强混凝土（HFRC）相比，HFRP4CC（含4 % PCM）的质量损失减少38.5% %，相对动态弹性模量增加8.3 %，表现出优异的抗冻融性能。来自PCM载体的纳米sio₂细化了孔隙结构，而混合纤维促进了C-S-H凝胶的形成，增强了界面结合，协同减轻了霜冻损害。光纤网络还抑制了pcm诱导的孔隙，优化了孔隙分布，与HFRC相比，渗透深度和相对渗透系数分别降低了9.5% %和25% %。虽然PCM略微增加了电通量，但纤维的孔隙填充和离子阻断作用保持了HFRPCC的抗渗优势。经过100次热循环后，力学性能下降幅度小于3 %，相变循环稳定性好。开发的HFRPCC结合了热调节和结构优化，显著提高了混凝土的力学性能、抗冻融性能和抗渗性能，为极端环境下的混凝土工程提供了高性能解决方案。

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引用次数: 0

Corrigendum to “High-temperature behaviour and strength modelling of GGBS–Dolomite and GGBS–fly ash–dolomite rubberised geopolymer concretes” [Constr. Build. Mater. 514 (2026) 1–32/ 145503] “ggbs -白云石和ggbs -粉煤灰-白云石橡胶地聚合物混凝土的高温性能和强度模型”的勘误表。构建。材料。514 (2026)1-32 / 145503]

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-18 DOI: 10.1016/j.conbuildmat.2026.145578

Arjun Raj P K , Praveen Nagarajan , A.P. Shashikala , Sudha Das , Blessen Skariah Thomas , Thandiwe Sithole

引用次数: 0

Corrigendum to “Surface characterization of consolidated earthen substrates using an innovative multi-analytical strategy” [Constr. Build. Mater. 438 (2024) 137154] “使用创新的多分析策略对固结土基板进行表面表征”的勘误表[参考文献]。构建。Mater. 438 (2024) 137154]

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-10 DOI: 10.1016/j.conbuildmat.2026.145577

Kerstin Elert , Beril Biçer-Simşir , Elena Correa , Carlos Rodriguez-Navarro , Davide Gulotta

引用次数: 0

Fatigue crack growth behavior of Q235/Q460 steels welded joints with gradient strength matched welded metals 梯度强度匹配焊接金属Q235/Q460钢焊接接头疲劳裂纹扩展行为

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-20 DOI: 10.1016/j.conbuildmat.2026.145701

Anye Xu , Yipin Wan , Jiale Zhang , Zhenqiang Bie , Weikai Zhang , Min Ye , Xuding Song

Welding strength matching has significant influences on fatigue properties of welded structures. In this study, gradient strength matched (GSM) process with different filler metals ER50–6 (E5) and ER80S-G (E8) are applied for Q235/Q460 welded joints. Three filling configurations are used: E5 + E8 + E5 (GSM3), E5 + E8 + E5 + E8 + E5 (GSM5) and E5 (conventional joint). Experiments including microstructure and hardness, tensile, and fatigue crack growth (FCG) tests for base metals, welded metal (WM) and heat affected zones (HAZ) are conducted. Residual stress fields for welded joints are simulated using Abaqus software. Results show improved FCG resistance and fracture toughness of WM of GSM3 and GSM5 with corresponding crack opening force values increasing 3.5 %-19.6 % and 9.2 %-40 %, respectively. The fracture toughness in WM of GSM3 and GSM5 increases 11 % and 30.4 %, respectively. However, GSM process has limited impact on microstructures, residual stress distribution, and FCG behavior in HAZ due to fixed welding heat input. Additionally, a modified Forman model is proposed by introducing number of E8/E5 interfaces in GSM joints, which provide a new methods and theoretical foundations for fatigue-resistant design and life prediction of dissimilar-steel welded structures.

焊接强度匹配对焊接结构的疲劳性能有重要影响。采用不同填充金属ER50-6 （E5）和ER80S-G （E8）的梯度强度匹配（GSM）工艺对Q235/Q460焊接接头进行了研究。三种配置是使用:E5 + E8 + E5 (GSM3), E5 + E8 + E5 + E8 + E5 (GSM5)和E5(传统的联合)。对基体金属、焊接金属和热影响区进行了显微组织和硬度、拉伸和疲劳裂纹扩展（FCG）试验。利用Abaqus软件对焊接接头的残余应力场进行了数值模拟。结果表明，GSM3和GSM5的WM抗FCG性能和断裂韧性均有所提高，相应的开裂力值分别提高了3.5 % ~ 19.6 %和9.2 % ~ 40 %。GSM3和GSM5在WM中的断裂韧性分别提高了11. %和30.4% %。然而，由于固定的焊接热输入，GSM工艺对热影响区内的显微组织、残余应力分布和FCG行为的影响有限。此外，通过引入GSM接头中E8/E5接口个数，提出了一种改进的Forman模型，为异种钢焊接结构的抗疲劳设计和寿命预测提供了新的方法和理论依据。

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引用次数: 0

Recovery and activation of recycled concrete powder using thermo-mechanical process 热机械法回收活化再生混凝土粉料

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-23 DOI: 10.1016/j.conbuildmat.2026.145695

Vithushanthini Arulkumar , Tuan Nguyen , Ngoc-Kien Bui , Echo Wang , Tuan Ngo , Takafumi Noguchi

The use of recycled concrete powder (RCP) from concrete recycling as a cement replacement is an important area to reduce the environmental impact of concrete. Although the performance and benefits of RCP have been demonstrated in previous studies, much less is known about the separation and recovery method of RCP, and its effect on the rehydration potential (i.e., activation) of recovered RCP. Thus, we investigate a thermo-mechanical recovery (TMR) process for the recovery and activation of RCP from industrial concrete waste. We found that the TMR process results in an RCP recovery rate of 8.5 % whereas a conventional jaw crushing method could only recover 1.1 % of RCP. In addition, the TMR process effectively recovers and activates cementitious phases in the recovered RCP, resulting in approximately 29 % reactive phases, primarily comprising dehydrated phases (belite and brownmillerite) and residual unhydrated cement phases, together with about 34 % amorphous phases, based on the total mass of the RCP. This leads to the significant rehydration effect of TMR-RCP with comparable strength at 3 and 7 days for 10–40 % cement replacement levels while 28-day strength at 40 % replacement level reaches 77 % of the cement control sample. The findings demonstrate that the TMR process is a promising approach to recover and activate RCP from concrete waste for cement replacement.

利用混凝土再生粉（RCP）替代水泥是减少混凝土对环境影响的一个重要领域。虽然RCP的性能和益处已经在以往的研究中得到证实，但对RCP的分离和回收方法及其对回收RCP的再水化电位（即活化）的影响知之甚少。因此，我们研究了从工业混凝土废料中回收和活化RCP的热机械回收（TMR）过程。我们发现TMR工艺的RCP回收率为8.5 %，而传统的颚式破碎方法只能恢复1.1 %的RCP。此外，根据RCP的总质量，TMR过程有效地回收和激活了回收的RCP中的胶凝相，产生了约29% %的反应相，主要包括脱水相（白橄榄石和褐磨矿）和残余的未水化水泥相，以及约34% %的非晶态相。这导致TMR-RCP在10 - 40% %水泥替代水平下3天和7天的强度相当，而在40 %替代水平下28天的强度达到水泥对照样品的77 %。研究结果表明，TMR工艺是一种很有前途的方法，可以从混凝土废料中回收和激活RCP，用于水泥替代。

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引用次数: 0

Rheological performance of asphalt binders modified with framework-supported high-latent-heat composite phase change materials 框架支撑型高潜热复合相变材料改性沥青粘结剂的流变性能

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-21 DOI: 10.1016/j.conbuildmat.2026.145703

Feng Ma , Liang Zhao , Yingjie Hou , Zhen Fu , Xinye Jiang , Pengkai Yang , Wenhao Dong , Yalu Wen , Jiasheng Dai , Qiang An

Leakage resistance and latent heat capacity are critical factors determining the applicability of phase change materials (PCMs) in asphalt pavements. In this study, paraffin wax was used as the core material and melamine–urea–formaldehyde (MUF) resin as the shell to fabricate microcapsules, while expanded graphite (EG) served as a structural scaffold to develop two composite PCMs, PW-MPCM-EG and PW/EG-MPCM. Pure paraffin and MPCM were also incorporated into 90# asphalt at 3–12 wt%, and their thermal, rheological, and chemical properties were evaluated through conventional binder tests, DSC, DSR, and BBR. Pure paraffin caused pronounced softening of the asphalt binder, whereas microencapsulation and EG hybridization effectively mitigated this effect. With increasing dosage, PW-modified asphalt exhibited strong softening, while PW-MPCM and EG-containing composites showed continuous reductions in penetration and ductility. At 12 wt%, the heat-absorption enthalpies of PW, PW-MPCM, PW-MPCM-EG, and PW/EG-MPCM were 10.6, 5.5, 4.6, and 7.7 J/g, respectively. DSC-25 and DSR results confirmed that excessive PCM addition significantly deteriorated low-temperature rheological resistance. Overall, a 6 % PCM dosage provided the optimal balance between latent-heat storage capacity and binder performance. Among all systems, PW/EG-MPCM exhibited superior enthalpy retention, improved thermal behavior, and minimal rheological degradation, indicating strong potential for temperature-regulated asphalt applications.

泄漏阻力和潜热容是决定相变材料在沥青路面适用性的关键因素。本研究以石蜡为核心材料，以三聚氰胺脲醛（MUF）树脂为外壳制备微胶囊，以膨胀石墨（EG）为结构支架，制备了PW- mpcm -EG和PW/EG- mpcm两种复合pcm。将纯石蜡和MPCM以3-12 wt%掺入90#沥青中，通过常规粘结剂试验、DSC、DSR和BBR评价其热、流变和化学性能。纯石蜡引起沥青粘结剂的明显软化，而微胶囊化和EG杂交有效地减轻了这种影响。随着掺量的增加，pw改性沥青表现出强烈的软化，而PW-MPCM和含eg的复合材料的渗透和延性持续降低。在12 wt%时，PW、PW- mpcm、PW- mpcm - eg和PW/EG-MPCM的吸热焓分别为10.6、5.5、4.6和7.7 J/g。DSC-25和DSR结果证实，过量的PCM添加显著恶化了低温流变性能。总体而言，6 %的PCM用量提供了潜热储存能力和粘合剂性能之间的最佳平衡。在所有体系中，PW/EG-MPCM表现出优异的焓保持性、更好的热行为和最小的流变降解，表明在温度调节沥青应用中具有很大的潜力。

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引用次数: 0

Chloride ion-triggered CNF capsules with cellulose nanofiber matrix for repeated healing of water repellency in cementitious composites 氯离子触发CNF胶囊与纤维素纳米纤维基质在胶凝复合材料的疏水性反复愈合

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials

Pub Date : 2026-03-21 Epub Date: 2026-02-20 DOI: 10.1016/j.conbuildmat.2026.145661

Biqin Dong , Huan Cao , Pengrui Lu , Hanquan Diao , Guohao Fang , Jing Li , Yuanyuan Zhang

In this study, we developed chloride ion (Cl⁻)-triggered cellulose nanofibers (CNF) capsules for repeated self-healing of water repellency in cementitious materials. The capsules consist of methyl palmitate (MPA) emulsion droplets embedded in a network of CNF. Nanofibrous morphology and surface carboxylate groups of CNF facilitate both interfacial jamming and Ag-mediated crosslinking, enabling the stable multicore structure. This structural design facilitates a simplified two-step fabrication process, significantly improving fabrication process efficiency. The distribution of CNF capsules in cement specimens was analyzed using X-ray microcomputed tomography (XCT), which confirmed their uniform dispersion. At optimal concentrations (0.5 % for neat cement paste and 1 % for mortar), the capsules reduced capillary water absorption by 48.91 % and 22.98 %, respectively, after two weeks of wet-dry cycles. These results demonstrate their efficacy in enabling repeated self-healing in both cement paste and mortar systems. The proposed material and process optimizations offer a scalable and practical approach for integrating responsive self-healing capsules into cementitious materials.

在这项研究中，我们开发了氯离子（Cl -⁻）引发的纤维素纳米纤维（CNF）胶囊，用于在胶凝材料中重复自我修复拒水性。胶囊由棕榈酸甲酯（MPA）乳液液滴嵌入CNF网络组成。CNF的纳米纤维形态和表面羧酸基团有利于界面干扰和ag介导的交联，使其具有稳定的多核结构。这种结构设计简化了两步制程，显著提高了制程效率。利用x射线微计算机断层扫描（XCT）分析了CNF胶囊在水泥样品中的分布，证实了它们的均匀分散。在最佳浓度（纯水泥浆浓度为0.5 %，砂浆浓度为1 %）下，经过两周的干湿循环，胶囊的毛细吸水率分别降低了48.91 %和22.98 %。这些结果证明了它们在水泥浆和砂浆体系中实现重复自愈的有效性。提出的材料和工艺优化提供了一种可扩展和实用的方法，将响应性自修复胶囊集成到胶凝材料中。

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引用次数: 0