摘 要：研究了利用建筑垃圾再生微粉作矿物掺合料所配制的混凝土的各项性能。研究结果表明，建筑垃圾再生砂粉有一定的活性，其各项性能指标满足Ⅱ级粉煤灰要求，可作为混凝土矿物掺合料使用。利用建筑垃圾再生微粉配制的C30、C50混凝土，掺量在20%以下时，对混凝土各项性能影响不大，配制出的再生混凝土工作性能和耐久性能与基准混凝土相当。 Abstract: The properties of the concrete made from the construction waste recycled powder were studied. The results showed that, the construction waste recycled powder has certain activity, all its performance meet the requirements of grade II fly ash, it can be used as mineral admixtures. When the dosage is below 20%, the performance of the C20, C50 concrete that made from the construction waste recycled powder have no change and its durability is almost the same as the reference concrete.

摘 要：为有效利用堆积的铁尾矿，以铁尾矿、水泥、秸秆、pH值调节剂等配制植生基质喷播到裸露的岩质边坡。研究了水泥掺量、pH值调节剂剂量为影响因素配制的植生基质的无侧限抗压强度随着龄期的变化规律。通过对试验数据的分析可知，当水泥掺量为6%时，植生基质的强度可以满足工程要求；无侧限抗压强度随pH值调节剂剂量的增加而降低；植生基质加入6%的pH值调节剂和8%的水泥时，14d龄期时的抗压强度迅速增加。 Abstract: In order to make full use of the packed iron tailings, iron tailings, cement, straw and pH regulator were used to prepare planting material sprayed on the slope of the exposed rock. Based on the influencing factors of the cement content and pH regulator dosage, this research aims to study the change law of the unconfined compressive strength with the change of its age. The results showed that, when the cement content is 6%, the strength of planting material can meet the engineering requirement. With the pH regulator dosage increases, the unconfined compressive strength reduces. When 6% and 8% of pH regulator dosage and cement added into the planting material respectively, the unconfined compressive strength increases quickly in 14d.

摘 要：使用水泥、石灰、矿粉等掺合料对黄河淤泥进行复合改性，测试了不同改性剂、水灰比和成型方式对淤泥试件抗压强度的影响，使用XRD衍射分析研究改性前后物相的变化，使用SEM扫描电镜观察改性前后形貌的变化。结果表明，使用水泥作为改性剂可显著改善淤泥试件的强度，加压成型的淤泥试块强度可达到浇筑成型试件的五倍以上。 Abstract: Compound modification by adding cement, lime, slag and other admixture into Yellow River silt, the influence of different modification agent, water cement ratio and forming method on the compressive strength of the silt specimen was analyzed. Using XRD and SEM to study the change of phase and morphology before and after compound modification. The results showed that, using cement as the modification agent can significantly improve the strength of the silt specimen, the silt specimen strength compression formed can reach more than five times of the pouring formed.

摘 要：结合实际工程，对超高层建筑底板施工过程中粗钢筋定位、电梯基坑处理、大体积混凝土浇筑、底板顶面施工方法等进行了叙述。施工过程中采用电子测温仪及计算机网络监控技术，对大体积混凝土温度变化及后期养护进行了实时监控，取得了满意的效果。 Abstract: Based on a real project, the thick steel bar positioning, the elevator foundation pit treatment, the mass concrete pouring, the top floor construction of the floor construction process of super high rise building are summarized. Electronic temperature measuring instrument and computer network monitoring technology are used in the construction process, the temperature change of mass concrete and the maintenance of the later period are monitored in real time, and the result is good.

摘 要：依据郑东新区高支模架现场试验结果，对地基土土压力及变形进行了监测，结合数值模拟及分层总和法理论计算结果对比高支模架不同位置的土压力与地基土变形，分析三者之间的数值差异，并对差异原因进行了分析，提出了在实际工程中应考虑应力集中保证一定的安全系数的观点，为高支模板及后续现浇结构设计施工提供了实测依据。 Abstract: Based on the field test results of high scaffolding in Zhengdong New Area, foundation pressure and deformation were monitored. Combined with the results of numerical simulation and layerwise summation method, the results of high scaffolding for different positions of earth pressure and soil deformation were compared, numerical difference and cause of the three were analyzed. The results showed that, considering the stress concentration and using safety factor in the practical construction work can provide experimental basis for high scaffolding and subsequent cast-in-situ concrete structure design and construction.

摘 要：发明了一种新型的拉伸黏结强度试验专用切割装置，对传统的切割方式和拉伸黏结强度试验方法进行了改进。结果表明，新切割装置相对传统切割工具更具效率和精度，切割精度可控在0.5mm。新切割装置和试验方法更具实用性，可对保温装饰板、复合板以及真空绝热板抹面层等复杂系统进行切割试验，效果较好；该装置和方法可应用在保温层与基层、保温层与抹灰层(装饰板) 以及抹灰层与基层的拉伸黏结强度试验中。使用新切割装置能保持切割样品的一致性和均匀性，保温层（或抹灰层）的内部结构不会因为切割而损坏，?覫50mm的粘贴铁块不易出现翘边和不平整等现象，这些优点使得后续的拉伸黏结强度试验结果更为真实可靠。 Abstract: By improving the traditional way of cutting and tensile strength test method, a new type of tensile strength of special cutting device is invented. The results show that the new cutting device is more efficiency and accuracy compared with the traditional cutting tools, and the cutting accuracy can be controlled in the 0.5mm; the new cutting device can be used to take the cut tests of complex systems such as some thermal insulation decoration board, composite board and vacuum insulation panel, and the effect is good; the new cutting device and method can be used in the tensile bond strength tests of insulation layer and the base layer, the insulating layer and the plaster layer (trim) and plastering layer and base layer. Using new cutting device can maintain consistency and uniformity of the cutting sample, the internal structure of thermal insulation layer (layer or plaster) will not be damaged, because cut of ?覫50mm paste such as iron is not easy to become warped edge and uneven phenomenon. Based on the advantages on bonding strength, the follow-up test results is more reliable.