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| 1 | 超早强水泥基材料的设计及试验研究显示文摘根据原材料粒径级配采用最紧密堆积理论设计了低水胶比的超早强水泥基材料基体,在此基础上,掺入适量的钢纤维制备了超早强水泥基材料,对其工作性能、早期抗压强度、长期收缩性能以及弯曲韧性等进行了研究。结果表明,制备的超早强水泥基材料工作性能符合自密实混凝土的性能要求,4 h抗压强度达到48 MPa,28 d抗压强度达到88 MPa,早期强度较高,后期强度发展稳定,具有较低的长期收缩性能与良好的弯曲韧性。钢纤维的掺入会降低超早强水泥基材料的工作性能与长期收缩性能,但是会显著改善超早强水泥基材料的力学性能,尤其是抗弯拉性能,相比之下混杂钢纤维对超早强水泥基材料力学性能的提高更明显。 | 张志豪 陈露一 郑丽 田宁宁 | 2019 | 新型建筑材料2019,46,9: | 6 |
| 2 | 碱矿渣胶结材低温水化行为与早期微观结构显示文摘研究了NaOH、水玻璃激发矿渣砂浆在5℃环境下抗压强度的发展,采用电阻率、选择性溶解法、压汞法(MIP)和扫描电子显微镜(SEM)分析了碱矿渣胶结材(AAS)低温水化过程及其早期微观结构.结果表明:碱矿渣胶结材在5℃环境下能持续水化,但其水化速度和抗压强度发展速度低于标准养护试件;在相同条件下,水玻璃激发AAS砂浆抗压强度较高,但其电阻率和水化程度低于NaOH激发AAS砂浆.另外,碱矿渣胶结材在5℃环境下养护1d时,硬化浆体孔隙率和大孔增加,其内部存在大量未反应微小矿渣颗粒,水化产物层薄弱、结构不密实,导致其早期强度发展缓慢. | 杨凯 杨永 李欣媛 赵展鹏 吴芳 | 2020 | 建筑材料学报2020,23,5: | 4 |
| 3 | 道路交通基础设施韧性研究现状及展望显示文摘自韧性概念被引入交通运输领域以来,韧性交通已经受到交通领域研究者的广泛关注。具有良好韧性的道路交通基础设施结构,能够有效应对自然、人为等各种灾害,进一步满足交通强国建设的高效交通和安全交通需求。为了明确国内外道路交通基础设施韧性的研究现状,本文从道路交通基础设施韧性的定义、度量方式、韧性提升技术等方面出发,综述了道路交通基础设施韧性研究成果,论述了未来道路交通基础设施韧性研究,尤其是韧性提升技术的发展方向和研究重点。分析表明,针对道路交通基础设施韧性的研究,主要集中在路网整体的交通网络组织规划层面,对于基础设施结构本体的韧性研究相对较为分散,缺乏统一全面的定义和度量标准。此外,在针对结构韧性的灾变破坏机理研究中,缺乏对全要素、结构系统间耦合等更为全面的研究认识,难以揭示灾变衍化的链式过程和突变特性。因此,对未来道路交通基础设施韧性的研究,应进一步揭示不同类型设施结构的灾变分析理论和方法,针对道路交通基础设施结构韧性建立全面统一的定义和度量标准,同时从预警监测、结构安全和韧性提升、柔性运行和灾后恢复等角度出发,形成并推广道路交通基础设施韧性提升的相关技术。 | 黄晓明 赵润民 | 2023 | 吉林大学学报(工学版)2023,53,6: | 2 |
| 4 | MMA基混凝土修补材料的研究进展显示文摘综述了近年来国内外一些改善甲基丙烯酸甲酯(MMA)基修补材料收缩性能的研究进展,分析其优缺点,并对MMA基修补材料的其他性能展开探讨。 | 韩健 徐玲玲 | 2021 | 中国胶粘剂2021,30,1: | 1 |
| 5 | 聚乙烯醇对磷酸钾镁水泥砂浆粘结性能的影响显示文摘磷酸钾镁水泥砂浆(MKPM)具有早凝、高强、与普通混凝土热膨胀系数相近等特点,是一种新型环保的混凝土结构修补材料。而聚乙烯醇(PVA)在修补领域中常作为提高粘结性能的改性剂,但其与快速修补材料磷酸钾镁水泥砂浆(MKPM)结合使用的研究尚未广泛开展。为进一步提升MKPM粘结性能,利用PVA对MKPM进行改性,并对聚乙烯醇-磷酸钾镁水泥砂浆(PMKPM)的粘结性能进行系统分析。结果表明,PMKPM的粘结性能(拉伸粘结强度、抗折双面粘结强度)随着PVA的增加而显著提高,当PVA掺量为0.6%时,其28d龄期的拉伸粘结强度相对基准组可提高41.6%;抗折双面粘结强度测试中,最优组P-3组相对P-0组最高可提高27.5%。在SEM分析中可发现,在粘结界面处PVA颗粒容易团聚,通过填充在界面处的毛细孔内部改善界面的密实度。且PVA膜具有极好的粘结性能,水化产物C-S-H凝胶能够与PVA膜共同形成一个整体,因此掺入PVA之后的PMKPM粘结性能显著提高。 | 林欣源 尤庆健 李寒菲 张国良 | 2022 | 福建建设科技2022,,1: | 0 |
| 6 | Influencing factors and optimization on mechanical performance of solid waste-derived rapid repair mortar显示文摘There is a great demand for high performance rapid repair mortar(RRM)because of the wide use of cement concrete.Solid-waste-based sulfoaluminate cement(WSAC)is very suitable as a green cementitious material for repair materials because of its characteristics of high early-age strength and short setting time.However,the influence and optimization of various factors of WSAC-based RRM,such as water-to-RRM ratio,binder-to-sand ratio and additives,as well as the further solid waste replacement of aggregate,remain to be studied.This paper comprehensively studied the influence of the above factors on the performance of WSAC-based RRM and obtained a green high-performance RRM by optimizing these factors.The experimental results showed that the early and late strength of the obtained RRM is excellent,and the setting time and fluidity are appropriate,which reflected good mechanical properties and construction performance.Ordinary Portland cement(OPC)doping could not improve RRM strength.It was feasible to prepare RRM with gold tailing sand replacing part of the quartz sand.This paper provides data and a theoretical basis for the preparation of high-performance RRM based on solid waste,expanding the high value utilization of solid waste,which is conducive to the development of a low carbon society. | Jingwei Li Xiangshan Hou Aiguang Jia Xin Xiao Xujiang Wang Yonggang Yao Ziliang Zhang Wenlong Wang | 2023 | Waste Disposal and Sustainable Energy2023,5,2: | 0 |
| 7 | Extending blending proportions of ordinary Portland cement and calcium sulfoaluminate cement blends:Its effects on setting,workability,and strength development显示文摘This study extended blending proportion range of ordinary Portland cement(OPC)and calcium sulfoaluminate(CSA)cement blends,and investigated effects of proportions on setting time,workability,and strength development of OPC-CSA blend-based mixtures.Thermogravimetric analysis(TGA)and X-ray diffraction(XRD)were conducted to help understand the performance of OPC-CSA blend-based mixtures.The setting time of the OPC-CSA blends was extended,and the workability was improved with increase of OPC content.Although the early-age strength decreased with increase of OPC content,the strength development was still very fast when the OPC content was lower than 60%due to the rapid formation and accumulation of ettringite.At 2 h,the OPC-CSA blend-based mortars with OPC contents of 0%,20%,40%,and 60%achieved the unconfined compressive strength(UCS)of 17.5,13.9,9.6,and 5.0 MPa,respectively.The OPC content had a negligible influence on long-term strength.At 90 d,the average UCS of the OPC-CSA blend-based mortars was 39.2±1.7 MPa. | Guangping HUANG Deepak PUDASAINEE Rajender GUPTA Wei Victor LIU | 2021 | Frontiers of Structural and Civil Engineering2021,15,5: | 0 |