摘 要：研究了花岗岩石粉、粉煤灰等矿物掺合料对水工混凝土抗氯离子侵蚀性能的影响，采用RCM法测定了氯离子在混凝土试件内部扩散系数的变化规律，并研究了矿物掺合料的掺量与水工混凝土抗氯离子侵蚀性能的关系。结果表明，矿物掺合料混凝土抗氯离子侵蚀性能较普通混凝土得以提高，通过混凝土双掺与单掺矿物掺合料的抗氯离子侵蚀性能的比较，双掺时抗氯离子侵蚀性能比单掺花岗岩石粉时更好。 Abstract: The effect of granitic powder, fly ash and other waste mineral admixtures on chloride resisting properties of hydraulic concrete are studied, and the change rule of internal diffusion coefficient of chloride ion in concrete specimens is tested by the method of RCM, furthermore, the relationship between the content of waste mineral admixtures and chloride resisting properties of hydraulic concrete performance is studied. The results show that chloride resisting properties of the concrete with admixtures is better than that of ordinary concrete, and the performance of concrete double mixed with admixtures is better than that of concrete single mixed with admixture.

摘 要：采用电通量法测定了不同锂渣掺量的混凝土在不同冻融循环次数下的电通量，并研究了电通量与各影响因素之间的函数关系。试验结果表明，随冻融循环次数的增加，混凝土电通量近似呈线性增加。当冻融循环次数为75次时，不同锂渣掺量下的混凝土仍具有较高的抗氯离子渗透性。锂渣粉的加入能明显降低混凝土的氯离子渗透性，随锂渣掺量的增加，混凝土电通量近似呈负指数函数关系下降。同时发现，电通量与初始电流间、电通量与氯离子渗透深度间、初始电流与氯离子渗透深度间均具有较好的线性相关性。 Abstract: Electric flux of concrete with different lithium slag powder content subjected to different freeze-thaw cycle number was determined by the test method of coulomb electric flux, and the function relations between electric flux and different factors were studied. The test results show that electric flux of concrete increases with increasing freeze-thaw cycle number by the linear function. When the freeze-thaw cycle number is 75, the concrete with different lithium slag powder content still has a high resistance to chloride penetration. Addition of lithium slag powder into concrete can significantly reduce its chloride penetration and electric flux decreases with increasing lithium slag powder content by the negative exponential function. In addition, the relationships between electric flux and initial current, electric flux and chloride ion penetration depth, initial current and chloride ion penetration depth all have a good linear correlation.

摘 要：以实际工程为例，分析了高性能混凝土超高泵送的影响因素并合理设计高性能混凝土配合比，依据以往经验验算了泵送压力，选择了合适的输送泵设备，并对超高层建筑泵送高性能混凝土过程中可能出现的堵管原因作出了分析，制定了相应的对策。 Abstract: Taking a practical engineering an example, the influence factors of high-performance concrete pumping to super high-rise building were studied, and the reasonable mix proportion of high-performance concrete was determined. Based on the engineering experience, the pressure of pumping was calculated accurately. At the same time, the appropriate pumping equipment was chosen. In addition, the reasons of plugging in the process of pumping high performance concrete to super high-rise building was analyzed and corresponding measures for avoiding tubes blockage were put forward.

摘 要：根据工程实际，研究了山砂混凝土的配制要点、施工关键技术及混凝土的控温及养护措施，总结了大体积山砂混凝土主要的施工技术和特性。 Abstract: According to the engineering practice, the preparation points of rock sand concrete, the key construction technology and the measures of concrete temperature control and curing are mainly researched, and the main construction technology and features of the massive rock sand concrete are summed up.

摘 要：在福建某滨海输电线路中开展了抗滨海盐渍土侵蚀的C60桩基混凝土工程示范研究。通过工程示范，检验了C60混凝土的施工性和抗裂性；并在其中埋设了耐久性传感器，用于长期环境作用下的混凝土劣化监测。通过示范工程发现，输电线路基础作业环境差，施工与管理水平相对落后。综合考虑电力施工特点和结构耐久性要求，建议以60d或90d龄期时达到C60混凝土抗压强度及规定的渗透性要求为宜；同时建议对地表上下桩基，特别是接桩处，必须进行防腐设计并规定施工要求。 Abstract: A mock-up test for C60 high performance pile concrete with high resistance to saline attack is completed in Fujian province and the properties of concrete are tested. The further durability of concrete is being monitored using embedded durability sensors at the field. The demonstration project shows that the environment of transmission line foundation work is poor, and the construction management level is relatively backward. So modifications are needed to formulate for the design of durable concrete structures near the ground as well as the corresponding construction management.

摘  要：根据普通预拌砂浆的技术性能要求，研究了胶材总量及各组分掺量、机制砂性能、外加剂种类及掺量对机制砂湿拌抹灰砂浆性能的影响，确定了稠度、保水性、可操作时间、强度及施工性能等综合性能优良的M5～M15抹灰砂浆的配合比；提出了机制砂湿拌砂浆中试生产应用过程中简要的质量控制方法。中试生产应用表明，M5～M15湿拌抹灰砂浆的和易性及施工质量良好，墙面均无空鼓开裂现象。Abstract:Theinfluenceoftotalamountofcementitiousmaterial(aswellastheratiosofeachcomponent),performanceofartificial-sandandtypesandamountofadditivesonthewet-mixedplasteringmortararestudiedaccordingtotheperformancerequirementsofcommonready-mixedmortar.Basedonexperiments,theoptimummixproportionofM5～M15plasteringmortarwithexcellentoverallproperties(mortarconsistency,waterretention,operabletime,compressivestrengthandworkability)isdetermined.Somesimplemethodsareputforwardtocontroltheproductionandconstructionqualityofplasteringmortar.ThepilotproductionandappliedresultsshowthatM5～M15wet-mixedplasteringmortarhasexcellentworkabilityandconstructionqualityduringtheperiodofconstruction.Hollowandcrackscouldnotbefoundontheplasterwallthroughalong-termverification.