苏州混凝土水泥制品研究院有限公司

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

磷酸镁水泥在工程结构中的修复加固研究进展
磷酸镁水泥在工程结构中的修复加固研究进展
  • 胡 玥1,2,3,郑淑清1,2,3,方 媛1,2,丁 铸1,2
2022年第3期
摘要
引用本文
摘   要:综述了近年来磷酸镁水泥(MPC)作为修复加固材料的研究进展,介绍了在工程结构中MPC的修复、加固及防锈作用,并解释了其修复、加固作用的原理及应用效果,还指出了目前存在的问题和今后的研究趋势。 Abstract: The research progress of magnesium phosphate cement (MPC) as a repair and reinforcement material in recent years is reviewed, and the repair, reinforcement and rust prevention of MPC in engineering structures are introduced, and the principle and application effect of its repair and reinforcement are introduced.  In addition, current problems and future research trends are put forward.
胡玥,郑淑清,方媛,等.磷酸镁水泥在工程结构中的修复加固研究进展[J].混凝土与水泥制品,2022(3):34-38,55. HU Y,ZHENG S Q,FANG Y,et al.Research Progress of Repairing and Strengthening for Engineering Structures with Magnesium Phosphate Cement[J].China Concrete and Cement Products,2022(3):34-38,55.
火灾高温后混凝土剩余强度及本构方程研究
火灾高温后混凝土剩余强度及本构方程研究
  • 杨 倩1,贾恒瑞2,陈宗平3,4
2022年第3期
摘要
引用本文
摘   要:为了深入研究工程建设中几种C25~C40强度等级混凝土经历火灾高温后的力学性能变化规律,提出了相对精确的剩余强度计算方法和受压本构方程,以经历温度、混凝土强度等级、恒温时间为变化参数,设计并完成了120个棱柱体试件的轴压试验,分析了各变化参数对其峰值应力、轴压刚度及耗能能力的影响规律,并给出了相应的剩余强度计算公式和轴压应力-应变本构方程的参数取值。结果表明,各试件的峰值应力、轴压刚度及耗能能力均随经历温度的升高而逐渐降低,随混凝土强度等级的提升呈现先小幅降低而后升高的变化趋势;增加恒温时间对试件的轴压力学性能不利,但影响程度不大。 Abstract: In order to further study the mechanical properties change rule, more accurate residual strength calculation method and compression constitutive equation of C25~C40 concrete after high temperature are put forward, taking the experience temperature, concrete strength grade and constant temperature time as variable parameters, and the axial compression tests of 120 specimens were designed and completed. The influence of various parameters on the peak stress, axial compression stiffness and energy dissipation capacity was analyzed. The corresponding residual strength calculation formula and the parameter values of axial compression stress-strain constitutive equation were given. The results show that the peak stress, axial compression stiffness and energy dissipation capacity of the specimens decrease gradually with the increase of temperature, and it decrease slightly at first and then increase with the increase of concrete strength grade. Increasing the holding time is unfavorable to the axial compression mechanical properties, but the effect is not significant.
杨倩,贾恒瑞,陈宗平.火灾高温后混凝土剩余强度及本构方程研究[J].混凝土与水泥制品,2022(3):28-33. YANG Q,JIA H R,CHEN Z P.Study on Residual Strength and Constitutive Equation of Concrete After Elevated to High Temperatures[J].China Concrete and Cement Products,2022(3):28-33.
含泥量对不同强度等级泵送山砂混凝土性能的影响
含泥量对不同强度等级泵送山砂混凝土性能的影响
  • 张 彦1,谭文君2,高礼雄2,李红辉1
2022年第3期
摘要
引用本文
张彦,谭文君,高礼雄,等.含泥量对不同强度等级泵送山砂混凝土性能的影响[J].混凝土与水泥制品,2022(3):24-27. ZHANG Y,TAN W J,GAO L X,et al.Influence of Mud Content on the Performance of Pumping Rock-sand Concrete with Different Strength Grades[J].China Concrete and Cement Products,2022(3):24-27.
大体积混凝土温度-应力场理论研究和应用现状综述
大体积混凝土温度-应力场理论研究和应用现状综述
  • 刘 丹1,2
2022年第3期
摘要
引用本文
摘   要:简述了大体积混凝土温度场、应力场及其耦合理论的发展历程和应用的研究进展,总结了各理论的优缺点、适用条件和应用现状,讨论了实际工程中大体积混凝土温度-应力场分析的典型案例,并对大体积混凝土温度-应力场理论的研究发展和工程应用方向进行了展望。 Abstract: Based on summary of the development process and application research of mass concrete temperature field, stress field and their coupling theory, the advantages, disadvantages, applicable conditions and application status of different theories are reviewed. The typical cases of mass concrete temperature-stress field analysis in engineering practice are discussed. The future development of temperature-stress field theory and engineering application of mass concrete are prospected.
刘丹.大体积混凝土温度-应力场理论研究和应用现状综述[J].混凝土与水泥制品,2022(3):17-23. LIU D.Review of Theoretical Research and Application of Temperature-Stress Field of Mass Concrete[J].China Concrete and Cement Products,2022(3):17-23.
不同掺合料对透水混凝土性能的影响
不同掺合料对透水混凝土性能的影响
  • 尹志刚1,张 恺 2,3,刘松颜1
2022年第3期
摘要
引用本文
摘   要:利用正交试验方法研究了硅灰掺量(3%、5%、7%)、偏高岭土掺量(8%、10%、12%)与聚丙烯纤维体积掺量(1%、2%、3%)对透水混凝土力学性能、渗透性能和耐久性能的影响。正交试验结果表明:硅灰对透水混凝土力学性能的影响较为显著,纤维对透水混凝土连续孔隙率的影响较为显著;得出推荐掺量为:硅灰掺量为7%、偏高岭土掺量为10%、纤维掺量为2%。冻融循环试验结果表明:透水混凝土的相对动弹性模量、抗压强度均随冻融循环次数的增加而降低,质量损失率、连续孔隙率和透水系数均随冻融循环次数的增加而逐渐增大;透水混凝土冻融循环后的相对剩余抗压强度与动弹性模量损伤度呈抛物线型下降的趋势。 Abstract: The effect of silica fume content(3%, 5%, 7%), metakaolin content(8%, 10%, 12%) and polypropylene fiber volume fraction(1%, 2%, 3%) on mechanical properties, permeability and durability of pervious concrete(PC) was investigated by using orthogonal test method. The orthogonal test results show that the silica fume has a significant effect on the mechanical properties of PC, and fiber has a significant effect on the continuous porosity of PC. The recommended content is the silica fume content is 7%, metakaolin content is 10%, and fiber content is 2%. The test results of PC freezing-thawing cycles show that the relative dynamic modulus and compressive strength of PC decrease gradually with the increase of freezing-thawing cycles, and the change rate of mass loss, continuous porosity and permeability coefficient increase gradually with the increase of freezing-thawing cycles. The relative residual compressive strength and dynamic elastic modulus of PC show a parabolic decline trend after freeze-thaw cycles.
尹志刚,张恺,刘松颜.不同掺合料对透水混凝土性能的影响[J].混凝土与水泥制品,2022(3):11-16. YIN Z G,ZHANG K,LIU S Y.Effect of Different Admixtures on the Properties of Pervious Concrete[J].China Concrete and Cement Products,2022(3):11-16.
应力状态下碳化与硫酸铵侵蚀对混凝土强度的影响
应力状态下碳化与硫酸铵侵蚀对混凝土强度的影响
  • 汪小平1,2,余 涛1,李 鑫1,李伟浪1,程可慧1
2022年第3期
摘要
引用本文
摘   要:为研究硫酸铵溶液腐蚀环境下混凝土的性能变化,结合实际工程情况,通过对混凝土试件进行压应力状态下的硫酸铵溶液腐蚀和碳化交替试验,研究了硫酸铵溶液浓度、压应力比和交替次数对混凝土强度的影响,分析了硫酸铵溶液对混凝土强度的影响机理,并根据碳化与硫酸铵溶液交替作用下的强度变化规律,建立了专用的测强曲线方程。结果表明:在硫酸铵溶液腐蚀下,随着腐蚀时间和溶液浓度的增加,混凝土强度下降;当压应力比为20%和40%时,压应力可以减小碳化和硫酸铵腐蚀对混凝土的不利影响;碳化与硫酸铵溶液腐蚀交替作用对混凝土的损伤有负面效应,存在叠加和交互作用。 Abstract: In order to study the performance change of concrete in the environment of ammonium sulfate solution erosion, combined with the actual engineering situation, the influence of ammonium sulfate concentration, compression stress ratio and alternating times on the strength of concrete was studied by alternating corrosion and carbonation of ammonium sulfate solution under compression stress. The influence mechanism of ammonium sulfate solution on concrete strength was analyzed, and the strength change rule under the alternating action of carbonization and ammonium sulfate solution was analyzed, and the special intensity measurement curve equations were established. The results show that under the ammonium sulfate corrosion, concrete strength decreases with increasing corrosion time and solution concentration, and when the compression stress ratio is 20% and 40%, the compression stress can reduce the adverse effects of carbonation and ammonium sulfate corrosion on concrete. The alternate action of carbonization and ammonium sulfate corrosion has a negative effect on the damage of concrete, and there are superposition and interaction effects.
汪小平,余涛,李鑫,等.应力状态下碳化与硫酸铵侵蚀对混凝土强度的影响[J].混凝土与水泥制品,2022(3):6-10,16. WANG X P,YU T,LI X,et al.Influence of Carbonation and Ammonium Sulfate Erosion on Concrete Strength Under Stress[J].China Concrete and Cement Products,2022(3):6-10,16.
聚羧酸分子结构对混凝土早强性能的影响
聚羧酸分子结构对混凝土早强性能的影响
  • 周栋梁1,李申振1,杨 勇1,舒 鑫1,冉千平2
2022年第3期
摘要
引用本文
摘   要:设计不同的侧链长度、酸醚比和分子量制备了系列聚羧酸减水剂样品,采用GPC方法测试了系列样品的分子量和聚醚转化率。通过砂浆和混凝土性能评价试验表征了聚合物的分散性能和力学性能,用微量热仪监测了水泥水化18 h内的水化放热趋势。试验结果表明,聚羧酸分子中聚醚侧链长度、酸醚比和分子量均能明显影响砂浆的早期强度,分子结构综合影响早强效果。水化放热历程证明,优化聚羧酸分子结构能加速水泥水化,影响规律与砂浆强度测试结果一致。混凝土性能测试显示,聚羧酸减水剂系列样品能缩短混凝土凝结时间,增加早期强度,且不影响后期强度的发展。 Abstract: A series of polycarboxylate superplasticizers were prepared by designing different side chain lengths, acid-ether ratios and molecular weights. The molecular weight and polyether conversion of the samples were investigated by GPC method. The performance of dispersion and mechanical properties of the polymers were characterized by the mortar and concrete performance test. The trend of hydration heat release within 18 h of cement hydration was monitored by microcalorimeter. The experimental results show that the length of polyether side chain, acid-ether ratio and molecular weight in polycarboxylate superplasticizers can significantly affect the early age strength of mortar. The effects of early age strength are caused by multiple factors of molecular structure. The hydration exothermic process proves that the optimized molecular structure can accelerate the hydration of cement. The influence rules for hydration heat are consistent with the results of mortar strength test. The results of concrete performance test show that the series of samples can shorten the setting time of concrete, increase the early age strength, and be particularly important not to affect the development of later strength.
周栋梁,李申振,杨勇,等.聚羧酸分子结构对混凝土早强性能的影响[J].混凝土与水泥制品,2022(3):1-5. ZHOU D L,LI S Z,YANG Y,et al.Effect of Molecular Structure of Polycarboxylate Superplasticizers on Early Age Strength of Concrete[J].China Concrete and Cement Products,2022(3):1-5.
上一页
1

关注《混凝土与水泥制品》

总访问量 468,401   网站统计

官方微信公众号关闭
苏州混凝土水泥制品研究院有限公司

关于我们    |    联系我们    |    订购杂志    |    回到顶部

版权所有:中国混凝土与水泥制品网  苏ICP备10086386号   网站建设:中企动力 苏州

版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州