摘 要：对同一混凝土配合比，不同形状和不同掺入量的稻草纤维混凝土进行了物理力学性能试验。结果表明，同一混凝土配合比下，随着稻草纤维掺量的增加，不同形状稻草纤维混凝土的物理力学性能会有所影响，抗压、劈裂抗拉及抗折强度会有所降低，但稻草纤维的掺入不仅能改善混凝土的韧性，也可提高混凝土的抗冲击性能。 Abstract：As the same concrete mix proportion, experiment of physical and mechanical properties with different shapes of straw fiber reinforced concrete is carried out. The results show that, under the same concrete proportion, with the increase of straw fiber dosage, physical properties of straw fiber reinforced concrete with different shapes will be affected, compressive strength, splitting tensile and flexural strength will be reduced, however, straw fiber can not only improve the toughness of concrete, but also can enhance the shock resistance of concrete.

摘 要：墩身是桥梁的重要竖向构件，也是桥梁施工的重点环节，其施工质量直接影响到桥梁受力。结合我国海外首条设计时速360km高铁——沙特麦麦高铁特大桥梁工程施工实例，针对该桥梁的墩身施工环节进行了探讨，总结出桥梁墩身施工各个环节的相关控制技术，可为同类工程提供参考和借鉴。 Abstract: Pier is the important vertical component of bridge, which is also the key links in bridge construction, the construction quality directly affects the bridge force. Combined with Chinese oversea first design speed of 360km high-speed rail-Haramain high speed (HHR) rail project rail bridge beam engineering construction as example, pier construction of bridge is discussed, related control technology of bridge pier construction in each link is summarized, which can provide the reference for the similar engineering.

摘 要：桶式基础结构的浮运安装采用气浮及负压安装工艺，气密性至关重要，同时设计对混凝土提出了耐久性的高标准要求，气密性高性能混凝土在水运工程中没有成熟的施工经验。本文以实际工程为例，介绍了气密性混凝土的配制、气密性的测试方法、混凝土的施工控制等，可供类似工程参考。 Abstract: The float installation of bucket-based structure is applied by air-flotation and installation process, the structure concrete air tightness is essential, at the same time, the design of concrete durability with high standard is proposed, the tightness of high performance concrete in marine engineering has little mature construction experience. For practical engineering as an example, mix design of gas-tightness concrete, test methods of air tightness, and construction control of concreteare intraduced, which can be used for reference in the similar projects.

摘 要：从水泥基多孔吸声材料的性能特点、吸声机理、材料组成、构造、应用领域以及制备方法等多个角度，系统地总结了国内外水泥基多孔吸声材料的研究和发展情况，并提出了需要解决的问题和将来的发展方向。 Abstract: Research progress and developments of cementitious porous sound-absorbing materials at domestic and abroad are summarized through several aspects, including performance features, absorption mechanism, material composition, structural form, application area and preparation method. The problem need to be solved and the direction for future research are also pointed out.

摘 要：进行了真空绝热板外墙保温系统性能试验研究，发明了一种新型的外墙保温拉伸黏结强度专用切割装置。结果表明，真空绝热板具有较低的导热系数，物理力学性能良好。真空绝热板薄抹灰外墙保温系统具有较好的安全性能和耐久性能，抗风压性能达到6.3kPa，耐候性试验后墙体外观较好，无空鼓、剥落和裂缝，耐候试验后抹面层和保温层拉伸黏结强度达到0.08MPa，系统抗冲击性能达到3J。系统具有较低的吸水量和较高的水蒸气湿流密度。真空绝热板外墙保温系统已经在某些外墙和屋面工程中应用，效果较好。 Abstract: The performance experiment of exterior wall insulation system for vacuum insulation board was carried out, and a new type of external wall thermal insulation tensile bond strength special cutting device was invented.The results show that, vacuum insulation board with lower thermal conductivity has good physical and mechanical properties. Vacuum insulation board thin plastering exterior wall thermal insulation system has better security performance and durability, anti-wind pressure performance reaches to 6.3kPa, exterior wall of weathering test after experiment is good, which is no hollowing, spalling and cracking, and tensile bond strength of finishing layer and the insulation layer reaches 0.08MPa after weathering test, system shock resistance reaches 3J. The system has a low water absorption and high water vapor density, and the external thermal insulation system of vacuum insulation panels has been used in some external wall and roofing projects, the effect is better.

摘 要：玻化微珠保温砂浆内的湿积累是水蒸气扩散，空气渗流，以及冷凝三种因素共同引起的，本文构建了以水蒸气分压力为驱动势的湿积累计算模型，计算并分析了水蒸气扩散，空气渗流，以及冷凝三种因素对湿积累的影响。空气流入时砂浆内水蒸气分压力和湿积累速率最大值向内迁移；空气流出时则相反。水蒸气冷凝的速率与冷凝区域的边界温度成正比。 Abstract: The humidity accumulation in thermal insulation mortar of glazed hollow beads is leaded by three factors include vapour diffusion, air transfusion and condensation. Humidity accumulation counting model is structured by using steam partial-pressure as driving force, the influence of vapour diffusion, air transfusion and condensation on humidity accumulation is counted and analyzed. When air inflows, the maximum value of steam partial-pressure and rate of humidity accumulation moved forward; when air outflows, the situation was converse. The rate of condensation for steam and boundary temperatures of condensation zone are direct proportion.