摘 要：将玄武岩纤维和聚丙烯纤维以不同体积掺量分别进行单掺和混掺制备C60纤维混凝土，对纤维混凝土进行抗压强度、劈裂抗拉强度、抗折强度、冻融损伤、干燥收缩性能试验，记录不同龄期下相关性能指标的变化差异并与普通混凝土进行对比分析。结果表明，将玄武岩纤维和聚丙烯纤维混掺可以弥补单一纤维的不足，充分发挥两种纤维的不同优势，混掺纤维对混凝土劈裂抗拉强度和抗折强度的提升具有显著效果，纤维混掺可以削弱冻融损伤对混凝土抗压、抗折强度的不利影响，降低混凝土的干燥收缩变形。Abstract:C60fiberconcretewaspreparedbymixingbasaltfiberandpolypropylenefiberwithdifferentvolumesinglemixingandmixing,andthecompressivestrength,splittingtensilestrength,flexuralstrength,freeze-thawdamageanddryingshrinkageperformanceoffiberconcreteweretested.Thedifferencesintheperformanceindicatorsofdifferentageswererecordedandcomparedwiththoseofordinaryconcrete.Theresultshowsthattheblendingofbasaltfiberandpolypropylenefibercanmakeupforthedeficiencyofsinglefiber,andgivefullplaytothedifferentadvantagesofthetwofibers.Themixedfiberhasasignificanteffectonthesplittingtensilestrengthandflexuralstrengthofconcrete.Theblendingcanweakentheadverseeffectsoffreeze-thawdamageonconcretecompressivestrengthandflexuralstrength,andreducethedryingshrinkagedeformationofconcrete.

顾万,肖鹏,康爱红,等.混掺纤维混凝土桥面铺装材料性能试验研究[J].混凝土与水泥制品,2019(6):53-58. GU W,XIAO P,KANG A H,et al.Experimental Study on Properties of Mixed Fiber Concrete Bridge Deck Pavement Materials[J].China Concrete and Cement Products,2019(6):53-58.

摘 要：根据地方废弃物的特点，把铜矿尾砂和再生骨料结合起来，代替砂石应用到普通混凝土中，通过调整外加剂掺量，保持水胶比不变，制作相应试件，测定其抗压强度、抗折强度及耐久性。结果表明，掺铜矿尾砂及再生骨料并未导致混凝土抗压强度及抗折强度明显降低，甚至有所提高。保持水胶比不变，调整铜矿尾砂和再生骨料用量，对混凝土耐久性影响不明显。 Abstract: According to the quantity characteristics of local waste, copper tailings and recycled aggregates are combined to replace sand and gravel in ordinary concrete. By adjusting the dosage of admixtures and keeping the water-binder ratio unchanged, the specimens are made to determine their compressive strength, flexural strength and durability. The results show that in terms of strength, the compressive strength and flexural strength of concrete are not significantly reduced or even improved by adding tailings and recycled aggregates. To keep the water-binder ratio unchanged and to adjust the amount of tailings and recycled aggregates, the durability of concrete is not significantly affected.

林祖宏,毛富胜,谢海波.铜矿尾砂再生骨料混凝土性能试验研究[J].混凝土与水泥制品,2019(6):98-100. LIN Z H,MAO F S,XIE H B.Experimental Study on Performance of Concrete with Copper Tailings and Recycled Aggregate[J].China Concrete and Cement Products,2019(6):98-100.

摘 要：为了研究废玻璃掺合料对混凝土各项力学性能的影响，对不同玻璃粉粒径（150~830 μm、75~150 μm、25~75 μm）和不同体积掺量（5%、10%、15%、20%）的废玻璃掺合料混凝土进行了抗压强度、劈裂抗拉强度和静弹性模量性能测试，分析了废玻璃粉粒径和体积掺量对混凝土力学性能的影响，同时研究了废玻璃粉掺合料混凝土的拉压比和弹强比。结果表明：废玻璃粉掺合料对混凝土力学性能影响较大，当玻璃粉掺量≥10%时，混凝土的抗压强度均有不同程度的提高，玻璃粉粒径越细，混凝土的抗压强度越高。随着废玻璃粉掺量增加，混凝土劈裂抗拉强度持续降低，拉压比减小。混凝土弹性模量随着玻璃粉的掺入均出现不同程度的增大，且玻璃粉粒径越小，弹性模量越大，弹强比随玻璃粉掺量先增大后减小。 Abstract: In order to study the influence of waste glass admixture on the mechanical properties of concrete, the compressive strength, splitting tensile strength and static elastic modulus of waste glass admixture concrete with different glass powder size (150~830 μm、75~150 μm、150~830 μm) and different volume content (5%, 10%, 15%, 20%) were tested. The influence of particle size and volume content of waste glass powder on the mechanical properties of concrete was analyzed, and the tension-compression ratio and elastic strength ratio of concrete were also studied. The results show that the waste glass admixture has great influence on the mechanical properties of concrete, when the content of glass powder is more than 10%, the compressive strength of concrete increases. And the finer the size of glass powder, the higher the compressive strength of concrete. With the increase of waste glass powder content, the splitting tensile strength and the tension-compression ratio of concrete decrease continuously. The elastic modulus of concrete increases in varying degrees with the addition of glass powder, and the smaller the particle size of glass powder, the larger the elastic modulus of the concrete. The elastic strength ratio first increases and then decreases with the addition of glass powder.

静行,刘雷鸣,赵毅,等.废玻璃掺合料对混凝土力学性能的影响[J].混凝土与水泥制品,2019(6):94-97. JING X,LIU L M,ZHAO Y,et al.Effects of Waste Glass Powder Admixture on Mechanical Properties of Concrete[J].China Concrete and Cement Products,2019(6):94-97.

摘 要：为扩大钢渣微粉在自密实混凝土(SCC)中的应用，采用标准试验方法研究了钢渣微粉及复合掺合料对硅酸盐水泥凝结时间、SCC拌和物填充性及凝结时间的影响。结果表明，钢渣微粉对水泥净浆的凝结具有明显的延缓作用，钢渣微粉掺量越大，水泥的凝结时间就越长；与钢渣微粉相比，复合掺合料的缓凝作用明显减小。采用钢渣微粉掺量为10%～50%，并按SF1级坍落扩展度要求配制的SCC拌和物具有良好的填充性；掺比例为1∶1的钢渣微粉-粉煤灰复合掺合料时，SCC拌和物的填充性明显提高。掺加钢渣微粉使SCC拌和物的凝结时间明显延长；与单掺钢渣微粉相比，掺比例为1∶1的钢渣微粉-矿渣微粉复合掺合料对SCC拌和物凝结时间的影响显著减小。 Abstract: In order to expand the application of steel slag powder in self-compacting concrete(SCC), the effects of steel slag powder and compound admixtures on setting time of portland cement paste, filling ability and setting time of SCC mixture were studied by standard test methods. The results show that steel slag powder has obvious retarding effect on the setting of cement paste. The larger the content of steel slag powder mixing in cement, the longer the setting time of cement paste. Compared with the steel slag powder, the retarding effect of compound admixtures is obviously reduced. The SCC mixtures with 10%~50% steel slag powder according to slump-flow requirements of SF1 grade have good filling ability. When the steel slag powder-fly ash compound admixture is mixed with a ratio of 1∶1, the filling ability of SCC mixture can be obviously improved. The setting time of SCC mixture is obviously prolonged by mixing with steel slag powder. Compared with the single steel slag powder, the effect of the steel slag powder-slag powder compound admixture with a ratio of 1∶1 on the setting time of SCC mixture is significantly reduced.

何若楠,王元纲,黄凯健,等.钢渣微粉及复合掺合料对水泥和自密实混凝土性能的影响[J].混凝土与水泥制品,2019(6):88-93. HE R N,WANG Y G,HUANG K J,et al.The Influence of Steel Slag Powder and Compound Admixture on Performance of Cement and Self-compacting Concrete (SCC)[J].China Concrete and Cement Products,2019(6):88-93.

摘 要：水泥混凝土道路由于其施工操作的便利和良好的性价比，目前在城市小区、乡村应用仍较为普及，但施工操作稍有不当水泥混凝土道路路面极易产生裂缝。基于对水泥混凝土道路建设施工经验总结及观察，分析论证了水泥混凝土路面产生各种裂缝的原因，并在此基础上提出了针对水泥混凝土路面各种裂缝的防控措施。 Abstract: Due to the convenience of construction operation and good cost performance ratio, cement concrete pavement is still widely used in rural areas currently, but the defect of cement concrete pavement is that it is very easy to produce cracks on the pavement with slight improper construction operation. Based on the summary and observation of the construction experience of cement concrete pavement, the causes of various cracks in cement concrete pavement are analyzed and demonstrated. On this basis, the prevention and control measures for various cracks in cement concrete pavement are put forward.

王文彬.水泥混凝土路面裂缝成因与防控[J].混凝土与水泥制品,2019(6):84-87. WANG W B.Case Prevention and Control of Cement Concrete Pavement Cracks[J].China Concrete and Cement Products,2019(6):84-87.

摘 要：由于受高温天气的影响，高速铁路CRTSⅡ型板式无砟轨道宽窄接缝混凝土的裂缝、破损病害发生频率较高，为此研制了满足运营高速铁路宽窄接缝修复施工要求的聚合物混凝土材料，成功应用于京沪高铁德禹特大桥宽窄接缝病害整治工程，并从工程概况、施工工艺、修复材料、施工方法及施工质量控制等方面对宽窄接缝混凝土伤损修复施工进行了归纳和总结。 Abstract: Because of the influence of high temperature, the concrete crack and damage which are found in the wide and narrow construction joint of the high-speed railway CRTS Ⅱ slab type ballastless track hare a high frequency of occurrence. The polymer modified concrete which met the requirements of the wide and narrow construction joint concrete repair project on the operating high-speed railway line are designed and prepared. And the polymer modified concrete was successfully applied in the wide and narrow construction joint of concrete repair project which located in the Deyu super bridge of the Beijing-Shanghai high-speed railway. That repair project was induced and summarized from the project overview, construction technology, repair materials, construction methods and construction quality and so on.

赵世煜,陈占,崔国庆,等.聚合物混凝土在CRTSⅡ型板式无砟轨道宽窄接缝混凝土修复施工中的应用[J].混凝土与水泥制品,2019(6):81-83. ZHAO S Y,CHEN Z,CUI G Q,et al.Application of Polymer Concrete in Wide and Narrow Construction Joint Concrete Repair Project of the CRTS Ⅱ Slab Type Ballastless Track[J].China Concrete and Cement Products,2019(6):81-83.