摘 要：用10%、30%和50%的废弃混凝土骨料替代天然骨料制备再生透水混凝土，并对其强度、透水性能和耐久性能进行了研究。结果表明，再生透水混凝土存在最优水灰比，当再生骨料掺量为10%、30%和50%时，透水混凝土的最优水灰比分别为0.40、0.40和0.45；随着再生骨料掺量和粒级的增加，再生透水混凝土的抗压强度、抗折强度降低，透水性能增强；5%硅粉会一定程度上提高透水混凝土的强度，但会对其透水性能产生不利影响；再生骨料的掺加会降低透水混凝土的长期耐久性能。 Abstract: Recycled permeable concrete was prepared by replacing natural aggregate with 10%, 30% and 50% recycled concrete aggregate, and its strength, permeability and durability were studied. Results show that the optimal water-cement ratio is 0.40, 0.40, 0.45 respectively when the addition of recycled aggregate is 10%, 30%, 50%. With the increase of recycled aggregate content and particle size, the compressive strength and flexural strength of recycled permeable concrete decrease, and the permeability of recycled permeable concrete increases. The incorporation of 5% silica powder can improve the strength of permeable concrete to a certain extent, but it will have an adverse effect on its permeability performance. The addition of recycled aggregate canl reduce the long-term durability of permeable concrete.

摘 要：选取水玻璃、丁苯胶乳和乳化沥青三种辅助胶凝材料，分别等质量替代橡胶混凝土中5%、10%、15%和20%的水泥，测定各组试件的表观密度、抗压强度、冲击强度和拌合物坍落度。结果表明：丁苯胶乳或乳化沥青掺量为5%时，橡胶混凝土的综合性能最优，坍落度和抗压强度均得到改善；丁苯胶乳提高橡胶混凝土坍落度的效果较好，乳化沥青提高抗压强度的效果较好；水玻璃则不宜作为辅助胶凝材料掺入橡胶混凝土中。 Abstract: Sodium silicate, styrene-butadiene latex (SBL) and emulsified asphalt (EA) were respectively selected to replace 5%, 10%, 15% and 20% cement in rubberized concrete. The apparent density, compressive strength, impact strength, and slump of all specimens were tested. The results show that the slump and compressive strength are improved when the content of SBL or EA is 5%; the effect of SBL on improving slump of rubberized concrete is better, while the effect of EA on improving compressive strength of rubberized concrete is better; sodium silicate should not be added into rubberized concrete as a supplementary.

陈卓明,李丽娟,熊哲.橡胶混凝土胶凝材料改进试验研究[J].混凝土与水泥制品,2019(9):90-94. CHEN Z M,LI L J,XIONG Z.Experimental Study for Improved Cementing Materials of Rubberized Concrete[J].China Concrete and Cement Products,2019(9):90-94.

摘 要：研发了集冷却水管与止水螺杆优点于一体的新型冷却止水螺杆。通过有限元软件对无冷却措施，水管冷却和新型冷却止水螺杆三种冷却效果进行数值分析，对比了水管冷却和新型冷却止水螺杆对超长混凝土墙体温度裂缝的控制效果，并将新型冷却止水螺杆冷却效果的数值分析结果与现场实测数据对比，验证了基于热流耦合算法的新型冷却止水螺杆模型的正确性。在此基础上，通过对新型冷却止水螺杆的管径、通水流量、进水温度以及螺杆在混凝土墙体内的分布间距等因素的冷却效果进行数值分析，研究了不同参数对施工期超长混凝土墙体温度的影响效果，阐述了不同参数对施工期超长混凝土墙体温度的影响机理，并给出了最佳冷却方案。 Abstract: A new cooling water stop screw that combined the advantages of cooling water pipe and water stop screw was developed. Through the finite element software, the three cooling effects of no cooling measures, water pipe cooling and new cooling water stop screw were numerically analyzed. And the control effect of water pipe cooling and new cooling water stop screw on the temperature crack of super long concrete wall was compared. The numerical analysis results of the cooling effect of the new cooling water stop screw were compared with the field measured data, and the correctness of the new cooling water stop screw model based on the heat flow coupling algorithm was verified. On this basis, through the numerical analysis of the cooling effect of the new cooling water stop screw pipe diameter, water flow rate, inlet water temperature and the distribution distance of the screw in the concrete wall，the cooling effect of the new type of cooling stop screw was analyzed. The effects of different parameters on the temperature of super-long concrete wall during construction period were studied. The influence mechanism of different parameters on the temperature of super-long concrete wall during construction period was expounded, and the best cooling scheme was given.

姚刚,魏银银,杨阳.冷却止水螺杆对混凝土温度裂缝影响因素及机理研究[J].混凝土与水泥制品,2019(9):84-89. YAO G,WEI Y Y,YANG Y.Research on Influence Factors and Mechanism of Cooling Water-stop Screw on Temperature Crack of Concrete[J].China Concrete and Cement Products

摘 要：对四块预制混凝土夹心墙板的热工性能进行了试验研究，通过改变拉结件的种类，探索其对墙板热工性能的影响，并采用有限元软件对其进行了模拟分析。结果表明：金属拉结件的热桥效应明显，与无拉结件的预制墙板相比，采用纤维拉结件的墙板的传热系数提高8%，而采用不同金属拉结件的墙板分别提高20.9%与14.3%；建议在实际工程应用中，对墙板的传热系数进行相应的放大，单位面积墙板的放大系数范围为0.71%～2.52%。 Abstract: The thermal performance of four prefabricated concrete sandwich wall panels were tested, the effects of the shear connectors on the thermal performance of the wall panels were explored by changing the types of connectors, and the simulation analysis of the performance of these wall panels was carried out by using the finite element software. The results show that the thermal bridge effect caused by shear connectors is obviously. Compared with the wall panel without connectors, the heat transfer coefficient of the wall panel with fiber connectors is increased by 8%, while the heat transfer coefficient of the wall panels with different metal connectors are increased by 20.9% and 14.3%, respectively. It is suggested that the relevant thermal performance parameters of the sandwich panels should be enlarged accordingly in practical engineering applications, and the amplification factor of per unit area should be taken from 0.71% to 2.25%.

徐桂明,陈旭东.预制混凝土夹心保温墙板热工性能试验研究与模拟分析[J].混凝土与水泥制品,2019(9):79-83. XU G M,CHEN X D.Experimental Study and Numerical Analysis of Thermal Performance of Prefabricated Concrete Sandwich Insulation Wall Panels[J].China Concrete and Cement Products,2019

摘 要：利用ABAQUS对竖向钢筋连接方式不同的预制剪力墙进行建模，对比分析其平面外性能。竖向钢筋连接方式分别为双排逐根连接、“梅花形”部分连接及单排连接。结果表明，剪力墙平面外破坏属于脆性破坏，墙身与地梁脱开，有倾覆趋势，但平面外仍具有一定的承载能力和刚度。竖向钢筋连接方式不同对预制剪力墙平面外承载力和刚度均有较大影响，由逐根连接改为部分连接其平面外极限承载力下降约15%，与现浇对比差距较大，刚度退化速度也大于现浇。 Abstract: The ABAQUS was used to model the prefabricated shear walls with different vertical reinforcement connections, and the out-of-plane performance was compared and analyzed. The vertical reinforcement connection modes were double row root-to-root connection, "plum-shaped" partial connection and single row connection. The results show that the out-of-plane damage of the shear wall is brittle failure，the wall and the ground beam are separated, but there is still a certain bearing capacity and stiffness outside the plane. Different connection modes of vertical reinforcement have a great influence on out-of-plane bearing capacity and stiffness of the prefabricated shear wall. From the root-to-root connection to the partial connection, the out-of-plane ultimate bearing capacity is reduced by about 15%，the rate of stiffness degradation is also greater than that of the cast-in-place shear wall.

陈思宇,朱杰江.装配式混凝土剪力墙平面外性能研究[J].混凝土与水泥制品,2019(9):76-78+83. CHEN S Y,ZHU J J.Research on Out-of-plane Performance of Prefabricated Concrete Shear Walls[J].China Concrete and Cement Products,2019(9):76-78+83.

摘 要：采用有限元软件ABAQUS建立CFRP与BFRP加固RC柱的数值模型，比较研究了两种FRP材料加固RC柱的抗震性能，并系统地讨论了FRP材料类型、长细比、轴压比、FRP加固层数等参数对RC柱抗震性能的影响。研究结果表明，模型可以较好地模拟FRP加固钢筋混凝土圆柱的抗震性能，与试验结果吻合。随着FRP包裹层数增加，试件的承载力逐渐提高，但存在最佳加固层数；随着轴压比的增加，试件承载力有一定提高，但延性降低。在长细比一定范围内，试件的承载力及延性得到较大提高。相同工况下，两种FRP加固RC柱在承载力、延性、耗能能力方面相近，但考虑到价格优势及较好的力学性能，BFRP在混凝土结构抗震加固领域有较好的应用前景。 Abstract: The numerical model of CFRP and BFRP-reinforced RC columns was established by finite element software ABAQUS. The seismic behavior of two kinds of FRP-reinforced RC columns was studied. The FRP material type, slenderness ratio, axial compression ratio and FRP reinforcement layer on the seismic performance of the RC column were systematically analyzed. The results show that the model can better simulate the seismic performance of FRP-reinforced reinforced concrete columns, which is in good agreement with the experimental results. With the increase of the number of FRP wraps, the bearing capacity of the test piece is gradually increased, but the optimal number of layers is present. With the increase of the axial compression ratio, the bearing capacity of the test piece is improved, but the ductility is reduced. In a certain range of slenderness ratio, the bearing capacity and ductility of the test piece are greatly improved. Under the same working conditions, the two FRP-reinforced RC columns are similar in bearing capacity, ductility and energy consumption. However, considering the price advantage and good mechanical properties, BFRP has a good application prospect in the field of seismic strengthening of concrete structures.

尚聪,马江霖,王崇革,等.CFRP与BFRP加固RC柱抗震性能比较研究[J].混凝土与水泥制品,2019(9):70-75. SHANG C,MA J L,WANG C G,et al.Comparative Study on the Seismic Performance of Reinforced Concrete Columns Strengthened with CFRP and BFRP[J].China Concrete and Cement Products,2019