作者： 武肖雨;刘杰胜;卢雨婷;陈永飞;周昊

期刊： 武汉轻工大学学报,2021年40(01):81-84+95 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,武汉430023;[卢雨婷; 刘杰胜; 武肖雨; 周昊; 陈永飞] 武汉轻工大学

关键词： 复合涂料;乳液;力学性能

摘要： 以偏高岭土为基料,水玻璃为碱激发剂,与EVA乳液进行复合,再加入填料、助剂等,通过搅拌制备偏高岭土地聚合物复合涂料。研究了不同的粉液比、填料和助剂等种类及其掺量对涂层力学性能的影响。结果表明:在粉液比为0.6,磷石膏掺量为8.26%,减水剂掺量为0.7%,偶联剂掺量为0.2%条件下,涂层的力学性能最佳。

语种： 中文

作者： 武肖雨;刘杰胜;董莪;周昊

期刊： 山东商业职业技术学院学报,2020年20(04):112-115 ISSN：1671-4385

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430000;[刘杰胜; 武肖雨; 周昊; 董莪] 武汉轻工大学

关键词： 地质聚合物;偏高岭土地质聚合物涂层;耐久性

摘要： 地质聚合物由于其良好的性能,在工程中得到广泛的应用,且在我国资源丰富。以偏高岭土基地质聚合物涂层为例,综述了地质聚合物种类、涂层的影响因素,表明不同的掺和材料、激发剂、固液比等对涂层性能产生不同的影响,该涂层能极好地提高混凝土构件的耐久性,得到广泛应用。

语种： 中文

作者： 卢雨婷;刘杰胜;武肖雨;陈永飞;高凡

期刊： 山东商业职业技术学院学报,2020年20(05):101-104 ISSN：1671-4385

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430040;[卢雨婷; 武肖雨; 刘杰胜; 陈永飞; 高凡] 武汉轻工大学

关键词： 聚合物防水涂料;影响因素;性能;趋势

摘要： 聚合物水泥防水涂料具有优异的防水性能且绿色环保,被广泛应用于建筑防水工程中.介绍了聚合物水泥防水涂料的防水机理,分析综述了影响聚合物水泥防水涂料性能的内在因素和外界环境因素,对各因素如何影响其性能、影响趋势及产生影响的具体原因进行了详细说明.

语种： 中文

作者： 冯博文;刘杰胜;付弯弯;彭浩;肖扬;...

期刊： 武汉轻工大学学报,2020年39(06):40-46 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[肖扬; 刘杰胜; 冯博文; 付弯弯; 彭浩; 谭晓明] 武汉轻工大学

关键词： 淡化海砂砂浆;抗折强度;抗压强度;抗渗性;抗酸腐蚀性;抗冻融性

摘要： 随着近些年来建筑混凝土用料需求增长导致出现河砂被过度开采从而出现自然恢复率小于利用率的现象,而海水中存在的海砂自然成为了河砂的替代品。对淡化海砂后形成水泥砂浆与普通河砂砂浆进行对比,在力学性能的抗压与抗折强度以及抗渗性、抗硫酸盐腐蚀性及抗冻融性等耐久性进行了实验研究。结果表明:在28 d养护期条件下,随着海砂代替河砂所制备的水泥砂浆比例增大,水泥砂浆试件的抗折强度、抗压强度均呈现负相关,且第28 d时海砂水泥砂浆试件的抗折强度达到最小值为3.671 8 MPa,抗压强度也达到最小值为20.457 8 MPa;随着海砂代替河砂比例增加进行对照实验,砂浆试件的抗渗性、抗冻融性有所降低,而抗硫酸盐腐蚀性有所提高。

语种： 中文

作者： Li, Faping;Liu, Lisheng;Liu, Ke;Zheng, Aohan;Liu, Jiesheng*

期刊： Construction and Building Materials,2020年239:117865 ISSN：0950-0618

通讯作者： Liu, Jiesheng

作者机构： [Li, Faping; Zheng, Aohan] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China.;[Li, Faping; Liu, Lisheng] Wuchang Univ Technol, Sch Urban Construct, Wuhan 430223, Hubei, Peoples R China.;[Li, Faping; Liu, Jiesheng; Liu, Ke] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Liu, Jiesheng] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Hubei, Peoples R China.

关键词： Cement mortar;Crack resistance;Permeability resistance;Waterproof;XRD

摘要： This paper aimed to investigate the effect of different dosages silicane on waterproof mechanism and micro-structure of control and modified cement mortar incorporated with silicane using water absorption of capillarity, crack resistance, wettability, permeability resistance and degree of hydration test. At the same time, the micro-structure mechanism of cement mortar were researched by the Scanning electron microscopy (SEM), the X-ray diffraction (XRD), the Fourier transform-infrared spectroscopy (FT-IR) and Nitrogen-absorption test. Modified cement mortar were prepared by incorporating 1%, 3% and 5% silicane into control cement mortar, respectively. The experimental results shown that for the different dosages silicone and mix designs used in this paper, the addition of silicane improved the crack resistance, contact angle and the permeability resistance while decreased the water absorption of capillarity compared with control cement mortar, which indicated that the waterproof of modified cement mortar was strengthened generally. The Non-evaporable water content was used to evaluate the degree of hydration of control modified cement paste. Experimental results illustrated that degree of hydration was restrained because of the incorporation of silicane, which could be testified using the XRD and FT-IR test. In addition, in comparison with control cement mortar, the maximum adsorption capacity and total pore volume of cement mortar were increased by the SEM and Nitrogen-absorption test, manifesting that most of pores of modified cement mortar was closed. Most importantly, the hydration and waterproof mechanism was revealed. © 2019 Elsevier Ltd

语种： 英文

作者： 石浡汛;董莪;刘杰胜;张同同;段焱侠

期刊： 武汉轻工大学学报,2020年39(1):40-43 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[张同同; 石浡汛; 刘杰胜; 董莪; 段焱侠] 武汉轻工大学

关键词： 剑麻纤维;水泥砂浆;力学性能

摘要： 本文研究了剑麻纤维的掺入量和纤维长度对水泥砂浆抗折、抗压、湿密度和稠度的影响。试验结果表明:剑麻纤维长度为3 cm,剑麻纤维掺入量为1%时,剑麻纤维水泥砂浆的抗压强度效果最好。剑麻纤维长度为3 cm,剑麻纤维掺入量为0.5%时,剑麻纤维水泥砂浆抗折强度表现的最好。当剑麻纤维的长度逐渐增大,掺入量增多时,剑麻纤维水泥砂浆的稠度和湿密度呈下降趋势。

语种： 中文

作者： 石光宇;刘杰胜;张荣堂;卢雨婷

期刊： 武汉轻工大学学报,2020年39(02):43-47 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[卢雨婷; 张荣堂; 刘杰胜; 石光宇] 武汉轻工大学

关键词： 丁苯橡胶乳液;丙烯酸酯乳液;修补材料;力学性能

摘要： 为分析不同种类、不同掺量的乳液在海工混凝土修补材料中的应用做准备.将不同掺量的丁苯橡胶乳液修补砂浆和丙烯酸酯乳液修补砂浆作为修补材料,进行力学性能对比后找出优缺点,确定最佳配合比为10％.试验可为后续制备优异的抗渗性和抗冻融性的修补材料打下良好基础.

语种： 中文

作者： Li Cong;Zhang Rong-tang;Zhu Jie-bing*;Liu Zhi-jun;Lu Bo;...

期刊： 山地科学学报(英文),2020年17(10):2548-2561 ISSN：1672-6316

通讯作者： Zhu Jie-bing

作者机构： [Li Cong; Zhang Rong-tang; Liu Jie-sheng] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Hube, Peoples R China.;[Lu Bo; Li Cong; Zeng Ping; Zhu Jie-bing; Jiang Yu-zhou; Wang Bing] Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Minist Water Resources, Wuhan 430010, Peoples R China.;[Liu Zhi-jun] Guangzhou Baiyun Int Airport Co Ltd, Guangzhou 510406, Peoples R China.

通讯机构： [Zhu Jie-bing] C;Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Minist Water Resources, Wuhan 430010, Peoples R China.

关键词： Model test;Bedding slope;Prestressed anchorage;Corrosion;Electrochemical measurement

摘要： The long-term stability of a prestressed anchored slope might be influenced by the durability of the anchorage structure. To understand long-term stability of anchored rock slopes, the research presented herein evaluated the performance evolution of a prestressed anchored bedding slope system in a corrosive environment by model test. The corrosion process in a prestressed anchor bar was monitored in terms of its open-circuit potential (OCP), corrosion current density (CCD), and electrochemical impedance spectroscopy (EIS). The stability of the prestressed anchored slope was evaluated by monitoring changes in anchorage force and displacements. The experimental results show that prestress and oxygen could reduce the corrosion resistance of the anchor bar, and anchor bars in a chloride-rich environment are very susceptible to corrosion. Prestressed tendons in a corrosive environment suffer a loss of anchorage force, the prestress decreases rapidly after locking, and the rate thereof decreases until stabilising; in the later stage, corrosion leads to the reduction of the cross-sectional area of the steel bar which may cause the reduction in anchorage force again. Anchorage force controls the deformation and stability of the anchored slope, the prestress loss caused by later corrosion may lead to an increased rate of displacement and stability degradation of the prestressed anchored rock slope.

语种： 英文

作者： Fu, Wanwan*;Lu, Yuting;Zhang, Rongtang;Liu, Jiesheng;Zhang, Tongtong

期刊： Journal of Molecular Liquids,2020年317:113932 ISSN：0167-7322

通讯作者： Fu, Wanwan

作者机构： [Lu, Yuting; Fu, Wanwan; Liu, Jiesheng; Zhang, Tongtong; Zhang, Rongtang] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430072, Peoples R China.

通讯机构： [Fu, Wanwan] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430072, Peoples R China.

关键词： Amino acids;Energy conservation;Enthalpy;Floors;Graphite;Heat exchangers;Mixtures;Radiant heating;Thermal conductivity;Composite phase change materials;Energy-saving effect;Floor radiant heating;Phase change enthalpy;Phase change temperature;Supercooling degrees;Thermal environment;Thermal reliability;Phase change materials

摘要： Floor radiant heating embedded phase change materials (PCMs) are a prospective field owing to its highly efficient energy-saving effect and comfortable thermal environment. In this work, using a non-eutectic mixture comprised of NaAc∙3H2O (main PCM) and glycine (temperature regulator) as PCM, and expanded graphite (EG) as supporting material, a novel composite PCM with high thermal performance used in the heat exchanger for the floor radiant heating was developed. The composition of the composite PCM was optimized, and its properties were studied. The results showed that the mixture containing 12% glycine was favorable due to its suitable phase change temperature (48.62 °C) and high phase change enthalpy (258.5 kJ·kg−1). The addition of 12% EG into the mixture could enhance thermal conductivity and prevent leakage of the mixture simultaneously. The resulting composite PCM melted at 47.14 °C with phase change enthalpy of 214.7 kJ·kg−1, supercooling degree of 1.49 °C and thermal conductivity of 6.400 W m−1 K−1. The composite PCM also presented a good thermal reliability. Hence, the as-prepared composite PCM would be of great promise for use in the heat exchanger for the floor radiant heating. Besides, the present work is expected to provide a new pathway for exploring new types of PCMs. © 2020 Elsevier B.V.

语种： 英文

作者： Gong, Xiaoqiang;Liu, Jiesheng*;Zhang, Tongtong;Jiao, Zhu

期刊： JOURNAL OF TESTING AND EVALUATION,2020年48(4):2803-2812 ISSN：0090-3973

通讯作者： Liu, Jiesheng

作者机构： [Jiao, Zhu; Liu, Jiesheng; Gong, Xiaoqiang; Zhang, Tongtong] Wuhan Polytech Univ, Sch Engn & Architecture, Wuhan 430023, Peoples R China.

通讯机构： [Liu, Jiesheng] W;Wuhan Polytech Univ, Sch Engn & Architecture, Wuhan 430023, Peoples R China.

关键词： Chemical activation;Fly ash;Fourier transform infrared spectroscopy;Gypsum;Mechanical properties;Mortar;pH;Physical properties;Scanning electron microscopy;Activation index;Comprehensive utilizations;Existing problems;Geotechnical application;Influence mechanism;Phosphogypsum;Powder activation;Resource utilizations;Lime

摘要： The resource utilization of phosphogypsum (PG) can reduce the consumption of resources, turn waste into valuables, turn damage into profit, and form a green recycling economy of “resources-products-regenerated resources.” The article, combined with the comprehensive utilization of PG, analyzes the existing problems. Using lime neutralization to pretreat PG, the pH value, mortar consistency and setting time, activation index, and physical properties as well as the Fourier transform infrared spectroscopy and scanning electron microscopy examination with lime dosage are discussed. The results show that the performance of the obtained mixture powder activation index was better when it was weakly acidic; it is suggested that the optimal pH value range of lime neutralization for modified PG was about 4.52. The physical properties of PG are greatly affected by the lime content, and the influence mechanism was analyzed. It is anticipated that the results of the present study will be useful in utilizing the waste materials (fly ash, PG) for various geotechnical applications. Copyright © 2019 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959

语种： 英文

作者： 魏靖;刘杰胜;冯博文;陈耀华;张磊

期刊： 武汉轻工大学学报,2020年39(06):51-55,107 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[刘杰胜; 冯博文; 魏靖; 陈耀华; 张磊] 武汉轻工大学

关键词： 磷石膏;生石灰;水泥砂浆;耐久性

摘要： 将生石灰对磷石膏进行陈化预处理,研究不同掺量生石灰对磷石膏水泥砂浆耐久性能的影响。结果表明,适量生石灰加入磷石膏水泥砂浆能改善其耐久性。生石灰的掺加会抑制磷石膏水泥砂浆抗冻性,磷石膏水泥砂浆的质量损失率和抗压强度损失率随生石灰掺入量的增多而变大;随着生石灰掺入量增加,磷石膏水泥砂浆的抗渗性和抗硫酸盐腐蚀性能先增大后减小,当生石灰掺入量为2%时,磷石膏水泥砂浆抗渗性及抗硫酸盐腐蚀性最好。

语种： 中文

作者： Zhao, Nenghao*;Zhang, Rongtang*;Yan, Echuan;He, Xiang;Liu, Jiesheng

期刊： Landslides,2020年17(7):1545-1560 ISSN：1612-510X

通讯作者： Zhao, Nenghao;Zhang, Rongtang

作者机构： [He, Xiang; Liu, Jiesheng; Zhao, Nenghao; Zhang, Rongtang] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Xuefu South Rd, Wuhan 430023, Peoples R China.;[Yan, Echuan] China Univ Geosci, Fac Engn, Lumo Rd, Wuhan 430074, Peoples R China.

通讯机构： [Zhao, NH; Zhang, RT] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Xuefu South Rd, Wuhan 430023, Peoples R China.

关键词： Dynamic models;Equations of motion;Friction;Landslides;Pore pressure;Pressurization;Shear bands;Speed;Thermal expansion;Vaporization;Equation of motion;Excess pore pressure;Governing equations;High speed landslide;Maximum temperature;Temperature changes;Thermal pressurization;Transition of motion;Shear flow;heating;hydromechanics;landslide;pore pressure;pressure field;shear band;sliding;thermal expansion;vaporization

摘要： The friction-induced thermal pressurization mechanism in the shear band is an important reason for the transition of motion state of landslides from creeping to high-speed sliding during their initial startup phase. In this paper, a dynamic model for the startup phase of high-speed landslides with thermo-hydro-vapor-mechanical (THVM) coupling in shear band is established and applied to the Vaiont landslide for case study. The model consists of three governing equations: the equation of motion controls the motion of the overlying slide mass, the heat equation controls the heat or temperature change in the shear band at the bottom, and the pore pressure equation controls the change of excess pore pressure in the shear band. The main variables of these equations interact with each other. In addition to the thermal expansion pressurization of pore water, vaporizing pressurization is systematically considered for the first time in this model. The analysis results of the model applied to the Vaiont landslide show that, at 10s, the excess pore pressure in the shear band is up to 4.5MPa, the maximum temperature is 295°C, and the velocity of each block is in the range of 24~31m/s. The evolution of excess pore pressure in the shear band is divided into four stages which have been discussed in detail. The THVM model established in this paper can reflect the physical mechanism of thermal pressurization inside the shear band of high-speed landslides during their startup process to a certain extent, and it could also explain why some landslides quickly turn to catastrophic high-speed sliding after they start. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

语种： 英文

作者： 张同同;刘杰胜;龚晓强;朱娇;杨玲

期刊： 山东商业职业技术学院学报,2020年20(01):108-111 ISSN：1671-4385

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[张同同; 刘杰胜; 杨玲; 朱娇; 龚晓强] 武汉轻工大学

关键词： 高吸水树脂;水泥砂浆;抗渗性;抗硫酸盐侵蚀;冻融循环

摘要： 将不同掺量的高吸水树脂掺入水泥砂浆中,对水泥砂浆的耐久性做了系统的研究。研究发现掺入高吸水树脂可以明显改善水泥砂浆的耐久性,水泥砂浆的抗硫酸盐侵蚀能力明显提高,伴随高吸水树脂掺入量的增大,砂浆的抗渗性也有所提高,抗冻性也逐步增强。高吸水树脂掺量在0~1%范围内,掺入量为0.5%时,砂浆的耐久性最佳。

语种： 中文

作者： Gong, Xiaoqiang;Liu, Jiesheng*;Sun, Zhengguang;Li, Faping

期刊： JOURNAL OF TESTING AND EVALUATION,2020年48(5):3539-3549 ISSN：0090-3973

通讯作者： Liu, Jiesheng

作者机构： [Liu, Jiesheng; Li, Faping; Gong, Xiaoqiang] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Sun, Zhengguang] Minist Educ, Key Lab Green Preparat & Applicat Funct Mat, 368 Friendship Ave, Wuhan 430062, Peoples R China.

通讯机构： [Liu, Jiesheng] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.

关键词： Calcination;Gypsum;Manufacture;Mortar;Portland cement;Scanning electron microscopy;Soil pollution;Soil testing;Water absorption;Water pollution;Calcined;Compressive and flexural strengths;Environmental;Industrial by-products;Phosphogypsum;Physical and mechanical properties;Radioactive contamination;Structural characteristics;Mechanical properties

摘要： Phosphogypsum (PG) is an industrial by-product from the wet manufacturing process of phosphoric acid production in the phosphating industry on rock phosphate. Indiscriminate dumping of PG results in soil, water, and air pollution and serious environmental damage (chemical and radioactive contamination). The application of PG as an additive in cement mortar was evaluated in this article. The properties of PG at 800°C in a muffle furnace and the effects on the mechanical behavior of cement have been studied in this article. The effect of using PG as a partial replacement for cement has been investigated by compressive and flexural strength tests. Water absorption, mortar consistency, dry bulk density, and water retention were also tested. Meanwhile, the internal structural characteristics of samples were determined though scanning electron microscopy analysis. By evaluating properties of mixture cement paste, according to the results of the study, it was determined that a cement mortar addition of 30 % calcined PG gave the optimum results. The mortar with calcined PG of 800°C has the characteristics of low density, light weight, and stable performance. Utilizing PG to produce cement mortar improves the mechanical property, while the environmental impact is negligible. Copyright © 2019 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959

语种： 英文

作者： 段焱侠;董莪;刘杰胜

期刊： 武汉轻工大学学报,2020年39(1):44-50 ISSN：2095-7386

作者机构： 武汉轻工大学土木工程与建筑学院,湖北武汉430023;[刘杰胜; 董莪; 段焱侠] 武汉轻工大学

关键词： 绿色医院;BP神经网络;评价模型

摘要： 在全球资源紧缩下,绿色发展已经成为一个重要趋势,能源消耗巨大的医院的绿色发展也显得尤为重要.以绿色医院建筑为研究对象,根据可模拟、可量化原则以及相关规范选取评价指标,运用AHP构建绿色医院建筑评价体系,确定各指标权重,建立BPNN_AHP评价模型.根据比较AHP评价模型与BPNN_AHP评价模型的精度,来判断BPNN_AHP模型的优化性能,仿真试验结果表明,BPNN_AHP模型较AHP模型平均误差值减少了1.78％,从而证明了基于BPNN_AHP的绿色医院建筑评价体系的评价模型的可行性.

语种： 中文

作者： Xing, Shanshan;Dong, E.;Liu, Jiesheng*;Yu, Yuanyuan

期刊： JOURNAL OF TESTING AND EVALUATION,2019年47(1):525-536 ISSN：0090-3973

通讯作者： Liu, Jiesheng

作者机构： [Xing, Shanshan; Liu, Jiesheng; Yu, Yuanyuan; Dong, E.] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan Changqing Pk,Southern Rd 68, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Liu, Jiesheng] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan Changqing Pk,Southern Rd 68, Wuhan 430023, Hubei, Peoples R China.

关键词： Bending strength;Blending;Cements;Mortar;Scanning electron microscopy;Comprehensive utilizations;Compressive and flexural strengths;Dry bulk densities;Economic benefits;High temperature furnaces;Mechanical behavior;Rice husk ash;Water permeability;Water absorption

摘要： The morphology of rice husk ash (RHA) samples obtained at 400°C in a vertical high temperature furnace was characterized by scanning electron microscopy, and the effect of RHA on the mechanical behavior of cement mortar was studied. The RHA sample is slightly grey in color and there are some black particles. RHA samples have many sheets that are vertically and horizontally interlaced. The effect of RHA on the compressive and flexural strengths test for cement mortar has been investigated. The water absorption, mortar consistency, dry bulk density, and water permeability were tested. The compressive and flexural strengths decreased with the replacement of RHA. The mortar consistency improved, and water absorption increased. The dry bulk density of cement mortar decreased, and the water permeability increased. Because RHA is a resource containing properties that have the potential for categorizing it as waste, the comprehensive utilization of RHA is significant for improving environmental protection and gaining economic benefits. Copyright © 2018 by ASTM International

语种： 英文

作者： 孙雨辰;刘杰胜;张荣堂

期刊： 武汉轻工大学学报,2019年38(5):59-62 ISSN：2095-7386

作者机构： 武汉轻工大学 土木工程与建筑学院,湖北 武汉,430023;[孙雨辰; 张荣堂; 刘杰胜] 武汉轻工大学

关键词： 水泥砂浆;海砂水洗;海砂替代河砂;抗压强度;抗折强度;表观密度:吸水率

摘要： 探究了用海砂替代河砂以不同替代比例(25％,50％,75％,100％)和不同养护龄期(3 d,7 d,28 d)对水泥砂浆试件的表观密度、吸水率、抗折强度和抗压强度等物理性能的影响.经过对实验数据的合理分析总结,得出以下结论:随着用海砂替代河砂的替代比例的增加,水泥砂浆试件的表观密度呈下降趋势;随着海砂替代河砂的比例增加,试件吸水前的质量、吸水后的质量和吸水率均呈负相关:在相同养护龄期的条件下,通过提高海砂替代河砂的比例,水泥砂浆试件的抗折强度和抗压强度均呈减小的趋势,且养护龄期越长,这种减小的趋势越明显:在相同的替代比例下,随着养护龄期增加,试件的抗折强度和抗压强度呈增加趋势,且替代比例越小,这种增加的趋势越明显:在替代比例为25％,养护龄期为28 d时,海砂砂浆的表观密度、抗压抗折强度均为最大.

语种： 中文

作者： 苏杜成;刘杰胜

期刊： 百科论坛电子杂志,2019年(23):680-681 ISSN：2096-3661

作者机构： 武汉轻工大学给排水科学与工程 湖北 武汉 430000;武汉轻工大学土木工程与建筑学院副院长 湖北 武汉 430000;[刘杰胜; 苏杜成] 武汉轻工大学

关键词： 地聚合物;特性;应用

摘要： 国内外很多研究者对地聚合物相关性能进行了研究.本文从碳化、高温、酸的腐蚀和硫酸盐的侵蚀等方面阐述了地聚合物材料的特性.地聚合物具有优良的有机聚合物,陶瓷和水泥性能,所以可以应用于新型胶凝材料、有毒废物密封等方面.

语种： 中文

作者： Li, Faping;Liu, Jiesheng*

期刊： JOURNAL OF TESTING AND EVALUATION,2019年47(2):1360-1374 ISSN：0090-3973

通讯作者： Liu, Jiesheng

作者机构： [Li, Faping; Liu, Jiesheng] Wuhan Polytech Univ, Sch Civil Engn & Architecture, 68 Xuefu S Rd, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Liu, Jiesheng] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, 68 Xuefu S Rd, Wuhan 430023, Hubei, Peoples R China.

关键词： Bending strength;Bending tests;Cements;Compressive strength;Cracks;Mortar;Nitrogen;Porosity;Scanning electron microscopy;Silicon;Strength of materials;Bending and compressive strength;Cement mortars;Crack resistance;Inner structure;Macroscopic properties;Micro mechanisms;Modified mechanism;Nitrogen absorption;Water absorption

摘要： This article aimed to research the effect of organic silicon on the density, mechanical strength, water absorption, porosity, and crack resistance of cementitious construction materials. Modified cement mortar was prepared by adding different amounts of organic silicon into control cement mortar. Mechanical strength was evaluated using bending and compressive strength tests. Porosity was evaluated to assess the inner structure of cement mortar. Furthermore, the micromechanism of modified cement mortar and control cement mortar was explored using the nitrogen-absorption test and a Scanning Electron Microscope (SEM). Experimental results showed that for the organic silicon and mix design used in this article, the incorporation of organic silicon generally reduced the mechanical strength and density and increased the water absorption, porosity, and crack resistance. In addition, the analysis of the nitrogen-absorption test and SEM test revealed the modified mechanism and the connection between the macroscopic properties and micromechanism of modified cement mortar. Copyright © 2018 by ASTM International.

语种： 英文

作者： Li Faping;Liu Jiesheng*

期刊： JOURNAL OF TESTING AND EVALUATION,2019年47(2):1516-1532 ISSN：0090-3973

通讯作者： Liu Jiesheng

作者机构： [Li Faping; Liu Jiesheng] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Sch South Rd 68, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Liu Jiesheng] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Sch South Rd 68, Wuhan 430023, Hubei, Peoples R China.

关键词： Adsorbents;Compressive strength;Cracks;Driers (materials);Durability;Fluidity;Hydration;Mechanical properties;Mortar;Polymers;Scanning electron microscopy;Water absorption;Absorption behaviors;Degree of hydration;Early cracks;Micro mechanisms;Nonevaporable water;Resistance tests;Strength tests;Superabsorbent polymer;Mechanical permeability

摘要： The article investigated the influence of Super Absorbent Polymers (SAPs) with absorption behaviors on the consistency, fluidity, water absorption, mechanical properties, early crack resistance, permeability resistance, and degree of hydration of cementitious construction materials. Mechanical strength was investigated using a flexural and compressive strength test machine. Nonevaporable water content was employed to assess the degree of hydration of the cement powders. The durability of mortar was characterized using early crack resistance and a permeability resistance test. Furthermore, the micromechanism of mortars modified by SAPs and control mortars was researched using a Scanning Electron Microscope (SEM). Experimental results showed that for the SAPs and mix designs used in this article, the incorporation of SAPs generally reduced the mechanical strength and increased the consistency, fluidity, water absorption, and degree of hydration of modified mortars compared with control mortars. The durability of mortars incorporating SAPs was greatly improved. The connection of the macroproperty and micromechanism of mortars was researched using an SEM. Copyright © 2018 by ASTM International.

语种： 英文