摘 要：以泡沫混凝土的成型工艺为基础，辅之以分散性良好的增强剂聚丙烯纤维，并掺加一定的辅助材料，配制出了一种新型水泥基泡沫-引发型多孔吸声材料。该材料吸声性能优越、成本低、对环境无污染。 Abstract: Based on the forming technics of foam concrete, adding the polypropylene fiber as strengthening agent and any other supplementary substances, a new kind of cement-based foam initiated porous sound absorption material is prepared. This material has the characteristics of good sound absorption, low cost of preparation and non-pollution to the environment.

摘 要：以废弃陶瓷破碎为颗粒较粗的细骨料，即陶瓷再生粗砂，利用其与本地特细砂掺配使用以达到对特细砂改性的目的。针对两种砂的不同特点，通过计算确定了陶瓷再生粗砂的合理掺量范围和最佳掺量。 Abstract: Waste ceramics are crushed as recycled ceramic coarse sand. And it was mixed with Kaifeng ultra fine sand to modify the ultra fine sand. According to the different features of these two sands, the suitable range of recycled ceramic coarse sand replacing Kaifeng ultra fine sand and its optimal mixing ratio is determined by calculation.

摘 要：根据工程实际，介绍了高性能混凝土配合比的选择、泵送施工及混凝土的养护及裂缝防治措施，总结了超高层建筑泵送混凝土施工可以借鉴的实用经验。 Abstract: According to the engineering practice, high performance concrete mix proportion selection, pumping construction and concrete conservation and crack prevention measures are introduced, and the learning practical experiences of the high-rise building pump concrete construction are summed up.

摘 要：为研究机场道面施工工艺和引气剂品种对混凝土气泡特征参数的影响规律，采用4种国内常用的引气剂配置了含气量为6%的机场水泥混凝土。试验结果表明，经排式振捣机振捣后，混凝土的含气量大幅度降低，气泡总数和小孔径气泡个数显著增加；掺不同品种引气剂的混凝土经机场道面施工后，其气泡特征参数有较大的差异；优质引气剂经施工后在混凝土中形成大量小孔径气泡，气泡间距系数明显降低。 Abstract: In order to study the effect of airport pavement concrete construction and air entraining agent on air void characteristic parameters, four types of air entraining agent which are frequently used in China are adopted, and the airport cement concrete with air content of 6% is tested. The results show that air content in concrete decreases greatly while the total air number and the tiny air void number increase remarkably after HPZ vibration. Concrete with different air entraining agent lead to quite different air void characteristic parameters after airport concrete construction. Air void spacing factor decreases greatly after HPZ vibration and lots of tiny air voids are entrained in concrete with good quality air entraining agent.

摘 要：结合实际生产需要，研究了预制混凝土构件自动化生产线中的自动化养护堆垛机，并通过ANSYS软件分析了立体养护设备的承载结构。分析结果表明，采用ANSYS软件进行有限元分析计算，较好地优化了堆垛机的结构，使其满足了设计要求。 Abstract: Combined with the actual production needs, a stacking machine of curing equipment of prefabricated concrete (PC) component automated production line is designed, and stereo curing equipment bearing structure is analyzed through ANSYS software. The analyzed results show that the structure of stacking machine of the curing equipment can be better improved, and can satisfy the design requirements by the ANSYS software for analyzing PC component finite element.

摘 要：采用CAD/CAE技术，以三维参数化建模软件Pro/E作为设计平台，进行钢筋混凝土排水管模具关键零部件的设计与建模，并装配得到整体虚拟模型。利用工程分析软件ANSYS对开合模装置的结构进行分析，以提前发现设计中存在的缺陷，及时对结构方案进行优化。 Abstract：By using three-dimensional parametric modeling software Pro/E of CAD/CAE technology as a design platform, the key parts of the mould for reinforced concrete sewer pipes are designed and modeled, and the parts are assembled to get a whole virtual model. Then, the structure of movable die device is analyzed using the engineering analysis software ANSYS, so as to find out the defects of mould design ahead of making products, and the structure scheme can be optimized in time.