混凝土研究_2024_《混凝土与水泥制品》杂志社

头部文案

发布时间：2020-01-06 00:00:00

全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊（光盘版）全文收录期刊

华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊



全部文章

混凝土研究

超高性能混凝土在模拟污水环境中的劣化过程研究

胡文佩1，2，李华兵3，郭晓潞3，*

2024年第4期

摘要

引用本文

摘要：制备浓度均为5%的硫酸溶液和柠檬酸溶液模拟污水环境，对比研究了普通混凝土（NC）和超高性能混凝土（UHPC）在模拟污水环境中的耐腐蚀性能和劣化过程。结果表明：经两种腐蚀溶液浸泡后，UHPC的外观破坏、腐蚀深度及劣化深度均远低于NC；浸泡106 d后，浸泡UHPC腐蚀溶液的pH值趋于稳定，而浸泡NC的腐蚀溶液pH值则持续上升；与NC相比，经硫酸溶液浸泡后，UHPC腐蚀表面的微观结构更密实，腐蚀表面仍有富余的Ca2+来有效防止硫渗入，从而使UHPC更耐酸腐蚀。 Abstract: Sulfuric acid solution and citric acid solution, both with the concentration of 5%, were prepared to simulate the sewage environment, and the corrosion resistance and deterioration process of normal concrete(NC) and ultra-high performance concrete (UHPC) in the simulated sewage environment were compared and studied. The results show that after soaking in the two corrosive solutions, the appearance damage, corrosion depth and deterioration depth of UHPC are much lower than those of NC. After soaking for 106 d, the pH value of the corrosion solution soaked in UHPC immersed tends to stabilize, while the pH value of the corrosion solution soaked in NC continues to increase. Compared with NC, the microstructure of the corrosion surface of UHPC is denser after soaking in sulfuric acid solution, and the corrosion surface is still rich in calcium to effectively prevent sulfur infiltration, which makes UHPC more resistant to acid corrosion.

胡文佩,李华兵,郭晓潞.超高性能混凝土在模拟污水环境中的劣化过程研究[J].混凝土与水泥制品,2024(4):1-6. HU W P,LI H B,GUO X L.Degradation progress of ultra-high performance concrete exposed to simulated sewage environment[J].China Concrete and Cement Products,2024(4):1-6.

氧化石墨烯-硅烷复合乳液对混凝土抗氯离子渗透性能的影响及机理分析

王继祖1，路荣波1，王汉增2

2024年第4期

摘要

引用本文

摘要：研究了涂覆氧化石墨烯-硅烷复合乳液和硅烷乳液对混凝土抗氯离子渗透性能的影响，并通过分子动力学模拟构建了氯离子在C-S-H凝胶孔道中的传输模型，分析了复合乳液的作用机理。结果表明：涂覆复合乳液与硅烷乳液均能有效提高混凝土的抗氯离子渗透性能，其中，复合乳液的效果更好；乳液中的分子与C-S-H界面通过静电力、分子间相互作用力、成键等方式互相结合，改变了C-S-H界面性能，减缓了水分子进入孔道中的速度，也降低了氯离子的渗透速度；乳液分子在孔道中通过吸附作用吸附周围的分子，形成较大体积的团簇体，阻塞了孔道，抑制了孔道中氯离子与水分子的传输，从而提高了混凝土的抗氯离子渗透性能。 Abstract: The coating effect of graphene oxide-silane composite lotion and silane lotion on the chloride ion penetration resistance of concrete was studied. The transport model of chloride ions in C-S-H gel channels was constructed by molecular dynamics simulation. The results show that coating composite lotion and silane lotion can effectively improve the chloride ion penetration resistance of concrete, and composite lotion has better effect. The molecules in the lotion and the C-S-H interface combine with each other through electrostatic force, intermolecular interaction force, bonding, etc., which changes the performance of the C-S-H interface, slows down the speed of water molecules entering the pores, and also reduces the penetration speed of chloride ions. The lotion molecules adsorb the surrounding molecules through adsorption in the pores, forming large clusters, blocking the pores, inhibiting the transmission of chloride ions and water molecules in the pores, thus improving the chloride ion penetration resistance of concrete.

王继祖,路荣波,王汉增.氧化石墨烯-硅烷复合乳液对混凝土抗氯离子渗透性能的影响及机理分析[J].混凝土与水泥制品,2024(4):7-11. WANG J Z,LU R B,WANG H Z.Effect of graphene oxide silane composite lotion on chloride ion penetration resistance of concrete and its mechanism analysis[J].China Concrete and Cement Products,2024(4):7-11.

高效缓凝减水剂与氧化镁膨胀剂对混凝土性能的影响

胡宇婷1，李伟1，吉飞1，张风臣2，郑春扬1

2024年第4期

摘要

引用本文

摘要：研究了不同高效缓凝减水剂（柠檬酸、葡萄糖酸钠、柠檬酸镁、柠檬酸锂）分别与氧化镁膨胀剂的共同作用对混凝土工作性、力学性能、干燥收缩、抗裂性能的影响。结果表明：柠檬酸锂对掺氧化镁膨胀剂混凝土拌合物的坍落度有负面影响，但柠檬酸、葡萄糖酸钠、柠檬酸镁能在一定程度上改善混凝土的工作性；各高效缓凝减水剂均可提高混凝土的力学性能；葡萄糖酸钠、柠檬酸镁、柠檬酸锂均可减少混凝土的干燥收缩；柠檬酸、葡萄糖酸钠、柠檬酸镁均对氧化镁膨胀剂在混凝土中的补偿收缩作用有正向影响，其中，柠檬酸镁、葡萄糖酸钠的效果相对更好；柠檬酸对掺氧化镁膨胀剂的混凝土早期开裂性能有负面影响，会促进裂缝的产生。 Abstract: The effects of different high-efficiency retarding(citric acid, sodium gluconate, magnesium citrate and lithium citrate) and water reducing agent combined with magnesium oxide expansion agent on the workability, mechanical properties, drying shrinkage, and crack resistance of concrete were studied. The results show that lithium citrate has a negative impact on the slump of concrete with magnesium oxide expansion agents, but the citric acid, sodium gluconate, and magnesium citrate can improve the workability of concrete to a certain extent. All high-efficiency retarding and water reducing agents can improve the mechanical properties of concrete. Sodium gluconate, magnesium citrate, and lithium citrate can all reduce the drying shrinkage of concrete. Citric acid, sodium gluconate, and magnesium citrate all have a positive effect on the compensatory shrinkage of magnesium oxide expansion agents in concrete, among which magnesium citrate and sodium gluconate have relatively better effects. Citric acid has a negative impact on the early cracking performance of concrete mixed with magnesium oxide expansion agent, which can promote the generation of cracks.

胡宇婷,李伟,吉飞,等.高效缓凝减水剂与氧化镁膨胀剂对混凝土性能的影响[J].混凝土与水泥制品,2024(4):12-15,20. HU Y T,LI W,JI F,et al.Influence of high-efficiency retarding and water reducing agents and magnesium oxide expansion agents on the performance of concrete[J].China Concrete and Cement Products,2024(4):12-15,20.

微纳米气泡水对砂浆力学、收缩性能的影响

罗作球1，2，胡宇博1，2，*，何廷树3，张凯峰1，2，孟刚1，2，万赈民3，张林啸1，2

2024年第4期

摘要

引用本文

摘要：为了探究微纳米气泡水（NBW）作为拌和水对砂浆性能的影响，对NBW与普通水拌和的砂浆抗压强度与收缩性能进行了对比分析。结果表明：NBW使砂浆28 d抗压强度提高了6%~13%，早期抗压强度提高更明显；NBW与矿物掺合料具有协同作用，能够降低砂浆的收缩，减少质量损失；NBW可以降低砂浆的总孔隙率和平均孔径，使砂浆的微观结构更加密实。 Abstract: In order to investigate the effect of micro-nano bubble water(NBW) as mixing water on the performance of mortar, a comparative analysis was conducted on the compressive strength and shrinkage deformation of mortar mixed with NBW and ordinary water. The results show that NBW increases the 28 d compressive strength of mortar by 6%~13%, with a more significant increase in early compressive strength. NBW has a synergistic effect with mineral admixtures, which can reduce the shrinkage of mortar and reduce mass loss. NBW can reduce the total porosity and average pore size of mortar, making the microstructure of mortar more compact.

罗作球,胡宇博,何廷树,等.微纳米气泡水对砂浆力学、收缩性能的影响[J].混凝土与水泥制品,2024(4):16-20. LUO Z Q,HU Y B,HE T S,et al.Influence of micro-nano bubble water on the mechanical and shrinkage properties of mortar[J].China Concrete and Cement Products,2024(4):16-20.

超高性能混凝土的流变性能及其应用研究进展

张国芳1，2，3，胡文佩1，2，3，*

2024年第4期

摘要

引用本文

摘要：综述了各种组成材料（水泥、矿物掺合料及纳米材料、骨料、纤维、外加剂）对超高性能混凝土（UHPC）流变性能的影响，并分析了UHPC在桥面铺装、预制拼装连接、预制构件、喷射加固修复、3D打印等不同应用领域下流变性能的要求，同时提出了改善UHPC流变性能的方法。 Abstract: The effects of various constituent materials(cement, mineral admixtures and nanomaterials, aggregates, fibers, additives) on the rheological properties of ultra-high performance concrete(UHPC) are summarized. The rheological performance requirements of UHPC in different application scenarios such as bridge deck paving, prefabricated assembly connections, prefabricated components, spray reinforcement repair, 3D printing are analyzed, and the methods to improve the rheological properties of UHPC are proposed.

张国芳,胡文佩.超高性能混凝土的流变性能及其应用研究进展[J].混凝土与水泥制品,2024(4):21-25,30. ZHANG G F,HU W P.Research progress on rheological properties of ultra-high performance concrete(UHPC) and its application[J].China Concrete and Cement Products,2024(4):21-25,30.

高温后预损伤混凝土的轴压试验研究

王连坤，梁锡东*，郭一彬，刘杰，林文皓

2024年第4期

摘要

引用本文

摘要：对不同预损伤程度下C30混凝土试件进行了高温（200、350、500 ℃）后轴心抗压试验，获取了试件的应力-应变全曲线，分析了高温对预损伤试件的质量损失率、峰值应力、峰值应变、弹性模量等的影响。结果表明：在相同温度下，预损伤程度越高的混凝土试件破坏越早；在相同预损伤程度下，高温温度越高，试件破坏越早；与温度相比，预损伤程度对试件轴压破坏的影响更大；各试件的质量损失率随着温度的升高而增加；预损伤程度越高，高温温度越高，试件的轴心抗压强度越低；随着温度的升高，各试件的峰值应力降低，峰值应变增加，上升段的斜率变小；各试件的弹性模量均随着温度的升高而降低。 Abstract: Axial compression tests were conducted on C30 concrete specimens with different degrees of pre-damage at high temperatures(200, 350, 500 ℃) to obtain the stress-strain curves of the specimens. The influence of high temperatures on the mass loss rate, peak stress, peak strain, elastic modulus, etc. of pre-damage specimens was analyzed. The results show that at the same temperature, the higher the degree of pre-damage, the earlier the concrete specimen fails. Under the same degree of pre-damage, the higher the high temperature, the earlier the specimen fails. Compared with temperature, the degree of pre-damage has a greater impact on the axial compression failure of the specimens. The mass loss rate of each specimen increases with the increase of temperature. The higher the degree of pre-damage and the higher the high temperature, the lower the axial compressive strength of the specimens. As the temperature increases, the peak stress of each specimen decreases, the peak strain increases, and the slope of the rising section of each curve decreases. The elastic modulus of each specimen decreases with the increase of temperature.

王连坤,梁锡东,郭一彬,等.高温后预损伤混凝土的轴压试验研究[J].混凝土与水泥制品,2024(4):26-30. WANG L K,LIANG X D,GUO Yibin,et al.Experimental study on axial compression of pre-damage concrete after high temperature[J].China Concrete and Cement Products,2024(4):26-30.

硫酸盐和碳酸盐侵蚀下水泥基材料抗压强度研究

陈阳1，温勇1，*，宋哲航1，刘佳1，郝恩泽1，李宇航1，把哈尔古丽·帕塔尔2

2024年第4期

摘要

引用本文

摘要：为探究不同摩尔比的碳酸根与硫酸根对碳硫硅钙石型硫酸盐侵蚀下的水泥基材料抗压强度的影响规律，选用五种不同配比的侵蚀溶液作为研究对象，进行了摩尔比（n碳酸根离子∶n硫酸根离子）为 2∶1、1.5∶1、1∶1、1∶1.5、1∶2 条件下的硫酸盐侵蚀试验，并对其侵蚀后的试件进行抗压强度测定。总结了不同摩尔比下水泥基材料的抗压强度随侵蚀龄期的变化规律。在此基础上建立了抗压强度随侵蚀时间的变化函数，得出了不同摩尔比下水泥基材料的抗压强度预测模型。 Abstract: In order to explore the influence law of different molar ratios of carbonate and sulfate on the compressive strength of cement-based materials under carbon-sulfur-silicate sulfate erosion, five erosion solutions with different proportions were selected as the research object, and the molar ratio(ncarbonate ion∶nsulfate ion) under the conditions of 2∶1, 1.5∶1, 1∶1, 1∶1.5, 1∶2 were carried out, and the compressive strength of the eroded specimens was measured. The change law of compressive strength of cement-based materials with erosion age at different molar ratios was summarized. On this basis, the change function of compressive strength with erosion time was established, and the prediction model of compressive strength of cement-based materials under different molar ratios was obtained.

陈阳,温勇,宋哲航,等.硫酸盐和碳酸盐侵蚀下水泥基材料抗压强度研究[J].混凝土与水泥制品,2024(4):31-33,37. CHEN Y,WEN Y,SONG Z H,et al.Study on compressive strength of cement-based materials under sulfate and carbonate erosion[J].China Concrete and Cement Products,2024(4):31-33,37.

早强剂对C30喷射混凝土抗压强度的影响

吉飞，李伟，陈本稳，李庆超，姜海东

2024年第4期

摘要

引用本文

摘要：研究了不同早强剂（元明粉、硫酸铝、七水硫酸镁、硝酸钙、亚硝酸钠、硫氰酸钠和CSH晶种）单掺及复掺对C30喷射混凝土抗压强度的影响。结果表明：不同厂家CSH晶种对C30喷射混凝土各龄期抗压强度的作用效果有所差异，其中，CSH晶种2#对抗压强度的提高效果最好；通过优化配合比，元明粉可以提高试件的早期抗压强度，且28 d抗压强度发展较好；硝酸钙、亚硝酸钠、硫氰酸钠单掺及与其他早强剂复掺对C30喷射混凝土8 h抗压强度的提高效果并不明显，甚至会降低喷射混凝土的抗压强度。 Abstract: The effect of different early strength agents(sodium sulfate, aluminum sulfate, magnesium sulfate heptahydrate, calcium nitrate, sodium nitrite, sodium thiocyanate, and CSH crystal seed) on the compressive strength of C30 shotcrete was studied by single and compound addition. The results show that the effect of CSH crystal seed from different manufacturers on the compressive strength of C30 shotcrete at different ages varies, among which CSH crystal seed 2# has the best effect on improving compressive strength. By optimizing the mix proportion, the early compressive strength of the specimens can be improved by using sodium sulfate, and the 28 d compressive strength development is better. The effect of adding calcium nitrate, sodium nitrite, sodium thiocyanate alone or in combination with other early strength agents on the 8 h compressive strength of C30 shotcrete is not significant, and may even reduce the compressive strength of shotcrete.

吉飞,李伟,陈本稳,等.早强剂对C30喷射混凝土抗压强度的影响[J].混凝土与水泥制品,2024(4):34-37. JI Fei, LI Wei, CHEN Benwen,et al.Influence of early strength agent on the compressive strength of C30 shotcrete[J].China Concrete and Cement Products,2024(4):34-37.

总访问量 468,401 网站统计

官方微信公众号关闭

关于我们 | 联系我们 | 订购杂志 | 回到顶部

苏ICP备10086386号

网站建设：中企动力苏州