摘 要：以江阴某发电厂排放的烟气脱硫石膏为原料，再加工热处理后，研究热处理脱硫石膏水化体系的强度和凝结时间。结果显示，再加工处理温度达150℃时，相应水化体系的施工性能和力学强度较优。采用XRD、DTA/TG、FTIR法分析各再加工热处理石膏水化体系的水化过程发现，二水石膏为各体系中主要的水化产物，且随着石膏再加工温度的不同，各项微观性能测试特征也有所不同，其结果体现与宏观力学强度的变化规律一致。 Abstract：Flue gas desulfurization gypsum from a power plant in Jiangyin was processed by heat treatment, and the strength and setting time of hydration system with heat-treated desulfurization gypsum were studied. The results show that when the processing temperature is up to 150℃, construction performance and mechanical strength of the corresponding hydration system are better. By using the analyze methods of XRD, DTA/TG and FTIR, hydration process of hydration system with heat-treated gypsum can be determinated, and it can be shown that hydration product of the waste gypsum is mainly dihydrate gypsum. With the changing of processing temperature of the waste gypsum, the micro performances of hydration system are different, and the change law is in accordance with that of mechanical property.

摘  要：将铁尾矿砂代替天然河砂制备水泥砂浆，通过测试其浆体性能、力学性能、耐久性能等指标，分析了铁尾矿水泥砂浆的材料特性。试验结果表明，在相同配合比条件下，铁尾矿砂浆比天然河砂砂浆流动性降低，而表观密度、抗压强度和弹性模量更高。水养条件下，铁尾矿砂浆发生膨胀，而天然河砂砂浆收缩。自然干燥状态下，两类试件均发生明显收缩现象。50次冻融循环及酸、碱溶液浸泡下，铁尾矿砂浆表现出较好的抗冻性和耐酸碱侵蚀性。随铁尾矿中可磁选颗粒含量增加，铁尾矿水泥胶砂试件早期力学性能提高，28d龄期时则降低。28d龄期时不含可磁选颗粒的铁尾矿水泥胶砂试件具有更高的无害孔含量，有利于提高力学性能。Abstract:Ironoretailingssand(IOTS)wasusedtopreparecementmortarbyreplacingnatureriversand,andmortarpropertiessuchasstrengthsanddurabilityweretexted.Theresultsshowthatapparentdensity,compressivestrengthandelasticmodulusofIOTSmortarmadebythesamemixproportionaregreaterthanthatofnatureriversandmortarexceptforlowerfluidity.SizeexpansionofIOTSmortaroccurscomparedtosizeshrinkageofnatureriversandmortarunderwatercuring,howeversignificantsizeshrinkageoccurstobothofmortarsundernaturaldrying.IOTSmortarcanstanddeteriorationof50freeze-thawcyclingandhavegreatacid-alkalicorrosionresistant.WithincreasingofmagneticgranulescontentinIOTS,mechanicalpropertiesofmortarsinearlyperiodincrease,but28dstrengthofmortarsdecreases.IOTSmortarsexcludingallmagneticgranulesareadvantageoustothemechanicalpropertyduetohighamountofharmlessporesat28days.

摘 要：在采用矿渣粉和粉煤灰复掺的基础上，以钢渣粉等比例取代矿渣粉，研究钢渣粉对混凝土工作性能、抗压强度、劈裂抗拉强度、微观结构和水化产物的影响。结果表明， 钢渣粉与矿渣粉复掺有利于提高混凝土的流动性、抗压强度和劈裂抗拉强度，掺钢渣粉混凝土微观结构致密，钢渣粉水化速度介于矿渣粉和粉煤灰之间。 Abstract: Based on the double mixing of the fly ash and slag powders, the influence of steel slag powder on the working performance, compressive strength, splitting tensile strength, microstructure and hydration products of concrete are studied by replacing slag powders with an equal proportion of steel slag powder. The results show that the double mixing of the fly ash and slag powders can improve the liquidity, compressive strength and splitting tensile strength of concrete. The microstructure of concrete with steel slag powder is compact. The hydration speed of steel slag powder is between that of slag powder and fly ash.

摘 要：以浙江移动杭州分公司营业中心项目主体结构3.6m预应力梁悬挑结构为例，介绍了采用低松驰高强钢铰线解决悬挑结构的配筋问题。施工中采用性能优良的QM锚具和QMJ挤压锚具，保证了工程质量，提高了层高的净空问题，满足了项目的实际需求。 Abstract: Taking the main structure prestressed beam with 3.6m long cantilever structure of the Zhejiang mobile Hangzhou branch business center project as an example, using low relaxation and high strength steel hinge line to solve some reinforcement problems of cantilever structure are introduced. It’s indicated that using QM anchorage and QMJ extrusion anchorage with excellent performances can ensure the engineering quality, improve the height clearance problems and meet the needs of the project in the construction.

摘 要：依托南水北调丹江口库区某预应力连续桥梁工程，通过分析桥梁1#墩0#块混凝土形成的缺陷原因，进行结构计算与检验，并提出相对应的有效解决方案。 Abstract: The reasons for concrete defect are analyzed based on No.0 bridge block of a prestressed continuous girder bridge in the Danjiangkou reservoir of South-North Water Transfer Project. The structural calculation and tests are done, and effective solutions are put forward.

摘 要：介绍了新发布实施的行业标准JGJ/T 308-2013《磷渣混凝土应用技术规程》的编制背景、目的及意见，并对该标准的主要条文作了解释和说明。 Abstract：The compilation background, purpose and signification of industry standard JGJ/T 308-2013 Technical specification for application of phosphorous slag powder concrete which has published and implemented are simply introduced. And the main compiled items of the standard are introduced and explained.