第七期_2017_《混凝土与水泥制品》杂志社

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第七期

煤矸石保温混凝土力学及保温性能试验研究

杨彬1,2，刘斌3，丁斌2,4

２０17年第7期

摘要

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摘要：对不同煤矸石掺量下的煤矸石保温混凝土进行了抗压、抗拉及保温性能试验研究。结果表明，煤矸石的加入不利于混凝土的强度，且随着掺量的增加，强度逐渐下降；但随着龄期的增加，不同煤矸石掺量的煤矸石保温混凝土的立方体抗压强度呈现一定的上升趋势；随着煤矸石掺量的增加，煤矸石混凝土的导热系数呈下降趋势，保温性能逐渐增强。当煤矸石掺量为30%时，C30煤矸石保温混凝土的强度和保温性能均满足使用要求，即煤矸石替代部分粗骨料应用于保温混凝土是可行的。 Abstract: In different coal gangue, the gangue insulation concrete compressive and tensile test and thermal insulation properties were carried out, the results show that the compressive strength and splitting tensile strength gradually decreased when the coal gangue added to the concrete. With the increasing age, different coal gangue thermal insulation concrete cube compressive strength showed a rising trend. With the increase of the coal gangue content, the thermal conductivity of coal gangue concrete tends to decrease, and the thermal insulation performance is enhanced. The strength and thermal insulation performance of C30 concrete can meet the requirements at the same time, when the coal gangue content was 30%. It is proved that it is feasible to use coal gangue in the field of thermal insulation concrete, instead of coarse aggregate.

杨彬,刘斌,丁斌.煤矸石保温混凝土力学及保温性能试验研究[J].混凝土与水泥制品,2017(7):89-91. YANG B, LIU B, DING B.Experimental Research on Mechanical Properties and Thermal Insulation Performance of Coal Gangue Insulation Concrete[J].China Concrete and Cement Products,2017(7):89-91.

铬铁渣替代建筑用砂的试验研究

汪发红1，水中和2

２０17年第7期

摘要

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摘要：对比研究了硅铬渣、水淬铬渣和高碳铬渣三种物质的物性和它们替代砂作为建筑材料的力学强度、收缩值和铬表面浸出等的差异。研究结果表明，高碳铬渣可经破碎后用于代替碎石，作为混凝土中的粗骨料使用，硅铬渣、水淬铬渣可作为混凝土中的细骨料使用。 Abstract: The silicon ferrochrome slag, water quenching ferrochrome slag and high carbon ferrochrome slag are studied. And the difference in mechanical strength, shrinkage and chromium surface leaching of the building materials as sand replaced by these three slag are studied. The results show that the high carbon ferrochrome slag can be used to replace the gravel after crushing rubble in the concrete, which used as a coarse aggregate. Silicon ferrochrome slag and water quenching ferrochrome slag can be used as a fine aggregate in concrete.

汪发红,水中和.铬铁渣替代建筑用砂的试验研究[J].混凝土与水泥制品,2017(7):86-88. WANG F H, SHUI Z H.Experimental Study on Silicon Ferrochrome Slag Instead of Construction Sand[J].China Concrete and Cement Products,2017(7):86-88.

镍渣和超细硅灰对硅酸盐水泥水化性能的影响

王顺祥1,2，吴其胜1，诸华军1，闵治安3，顾红霞2，吴阳2

２０17年第7期

摘要

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摘要：富硅镁冶金镍渣是一种具有潜在火山灰活性的固体废弃物，可通过超细硅灰改性激发潜在活性，使其在硅酸盐水泥中火山灰反应充分，形成致密的网络状C-S-H凝胶，针刺状AFt等水化产物。抗压强度、粒度分布、比表面积、水化热、孔径分布、TG-DSC、SEM等宏观及微观测试表明，熟料∶镍渣∶硅灰∶石膏=85%∶5%∶5%∶5%体系的28d抗压强度可达67.1MPa，较空白样高近7MPa；水化诱导前期放热量峰值为0.19379J/g，水化加速期放热量峰值为0.25262J/g；体系1的28d水化试样粉末2～50nm细孔所占比例为51%，可明显观察到C-S-H凝胶，AFt等水化产物。Abstract:Asthesolidwaste,thenickelslagmetallurgicallywithsiliconandmagnesiumelements(brieflycalled“nickelslag”)hasthepotentialpozzolanicactivity.Inordertogetpozzolanicactivityintheportlandcement,thepotentialactivityofslagisstimulatedbysuperfinesilicafume.Asaresult,manyhydrationProducts,suchascompactnetstructureofC-S-HgelandneedlelikeAFthasformed.Macroandmicrotestinghavebeencarriedout,suchascompressivestrengthtest,particlesizedistribution,specialsurfacearea,heatofhydration,poresizedistribution,TG-DSCandSEMtests.Theresultsshowthatthebestformulaofrawmaterialsisclinker:nickelslag:silicafume:gypsum=85%:5%:5%:5%.Its28dcompressivestrengthis67.1MPaand7MPalargerthantheblanksample’s.Whenitcarriesonhydrationreaction,thepeakofinductionperiodhydrationheatis0.19379J/gandtheaccelerationperiodis0.25262J/g.ThesystemNo.128dsamplepowder’s2～50nmmicroporeproportionis51%.Inallhydratedsamples,thedifferenthydrationproducts,suchasC-S-HgelandAFtcanbedariauslyfoumd.

王顺祥,吴其胜,诸华军,等.镍渣和超细硅灰对硅酸盐水泥水化性能的影响[J].混凝土与水泥制品,2017(7):81-85. WANG S X, WU Q S, ZHU Hua-jun,et al.Effects of Nickel Slag and Super Silica Fume on Hydration Performance of Portland Cement[J].China Concrete and Cement Products,2017(7):81-85.

C100高强钢管混凝土的生产及工程应用

尹素花1，刘玉1，杨晓光1，赵英2，郝永池1

２０17年第7期

摘要

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摘要：研究了胶材用量、水胶比和砂率对C100混凝土抗压强度的影响，并将最佳配合比应用于沈阳皇朝万鑫大厦钢管混凝土施工中。结果表明，胶材用量增加、水胶比降低都能提高C100混凝土的抗压强度，砂率的增加抗压强度先增加后减小，当胶材用量600kg/m3、砂率40%、水胶比在0.25时，C100混凝土的抗压强度达到110MPa以上。Abstract:Theeffectofthecementamount,water-cementratioandsandratiooncompressivestrengthofC100concretewasstudied.TheoptimummixratiowasappliedtothesteeltubeconcreteconstructionofShenyangHuangchaoWanxinmansion.Theresultsshowthattheincreaseofcementamountanddecreaseofwater-cementratiocanimprovethecompressivestrengthofC100concretebutincreasedfirstandthendecreasedwiththeincreaseofsandratio.ThecompressivestrengthofC100concretecanreach110MPawiththecementamount600kg/m3,sandratio40%andwater-cementratio0.25.

尹素花,刘玉,杨晓光,等.C100高强钢管混凝土的生产及工程应用[J].混凝土与水泥制品,2017(7):78-80. YIN S H, LIU Y, YANG X G,et al.Production and Engineering Application of C100 High Strength Concrete Filled Steel Tube[J].China Concrete and Cement Products,2017(7):78-80.

后锚固体系纯弯锚板刚性研究

龙帮云1,2,3，张恒3，杨慧邦4，谷文汉3，刘志强3

２０17年第7期

摘要

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摘要：为探究后锚固群锚试件在纯弯作用下锚板刚性性能的发挥，设计并制作了9个不同锚板厚度与锚栓间距的后锚固试件，主要研究了试件的破坏形态、极限承载力、锚栓应变、锚板应变和位移。结果表明，当锚板厚度大于18mm和锚栓间距小于10倍锚板厚度时，锚板的强度利用率较高，能达到70%左右。锚栓间距的增加或锚板厚度的增加，都会使后锚固试件的极限荷载得到提高，且锚板厚度的影响更为明显。锚板厚度过小或锚栓间距过大时，锚板应变发展迅速，锚板刚性性能较差。 Abstract: In order to investigate the properties of the rigidity of anchor plate under pure bending, 9 anchor plates with different thickness and anchor arrangement were designed to study the failure mode, ultimate bearing capacity, anchor strain, strain and deformation of anchor plate of specimens. The results show that utilization ratio of anchor plate strength will reached 70%, when the plate thickness more than18mm and anchor distance smaller than 10 times of plate thickness. The increase of the anchor bolt distance or thickness of the anchor plate lead to increasing of the ultimate bearing capacity, and the influence of the anchor plate thickness is more obvious. When the thickness of the anchor plate is too small or the anchor bolt distance is too large, the strain of the anchor plate develops rapidly, and the rigidity of the anchor plate is not excellent.

龙帮云,张恒,杨慧邦,等.后锚固体系纯弯锚板刚性研究[J].混凝土与水泥制品,2017(7):74-77. LONG B Y, ZHANG H ,YANG H B,et al.Research on Rigidity of Pure Bending Plate for Post-installed Anchoring System[J].China Concrete and Cement Products,2017(7):74-77.

含面层再生混凝土常规三轴试验研究

王海龙，赵什光，牛小玲，袁瑞

２０17年第7期

摘要

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摘要：使用DYS-2500高温高压岩石三轴试验机对含面层再生混凝土圆柱体进行了单轴压、常规三轴压缩试验研究。试验结果表明，含面层再生混凝土在单轴压和三轴压缩下试验破坏形态有所差别；在围压作用下含面层再生混凝土应力-应变关系曲线发展趋势平缓丰满，没有明显的峰值点；围压有助于提高含面层再生混凝土的峰值应变和峰值应力；15MPa围压时的峰值应力约为单轴压下峰值应力4.4～4.7倍，取代率对峰值应力的影响甚微；围压15MPa时的峰值应变比围压0时的峰值应变增加了7%～13%；取代率对再生混凝土的峰值应变有一定影响，大体呈递减趋势，但不明显。 Abstract: The regenerative concrete cylinder surface uniaxial and conventional triaxial compression test research was carried out by using DYS-2500 high temperature and high pressure rock triaxial testing machine, the test results show that including surface recycled concrete under uniaxial compression and triaxial compression test failure pattern is different. The stress-strain curve under the effect of confining pressure containing recycled concrete surface and develop gentle plump and have no obvious peak point. Confining pressure is helpful to enhancing the surface peak strain of the recycled concrete and the peak stress. When the confining pressure is 15MPa, the peak stress is the 4.4~4.7 times of that under uniaxial pressure. The influence of replacement ratio on peak stress is little. The peak strain of the confining pressure under 15MPa increased by 7%~13% than that under 0. The replacement ratio of recycled concrete has a certain influence on the peak strain, generally showed a trend of decline, but not obvious.

王海龙,赵什光,牛小玲,等.含面层再生混凝土常规三轴试验研究[J].混凝土与水泥制品,2017(7):70-73. WANG H L, ZHAO S G, NIU X L,et al.Experimental Study on Conventional Triaxial of Surface Recycled Concrete[J].China Concrete and Cement Products,2017(7):70-73.

尾矿细砂制备特种干混砂浆生产线的关键技术研究

黄天勇1,2，陈旭峰1,2，章银祥2

２０17年第7期

摘要

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摘要：通过测试尾矿细砂的基本性能，提出了尾矿细砂制备特种干混砂浆的关键点在于尾矿细砂的级配组合。介绍了用尾矿细砂生产特种砂浆的生产线。探讨了尾矿细砂制备特种干混砂浆生产线中原材料储存系统、烘干系统、筛分系统、配料/称量系统、混合系统和散装/包装系统的关键技术。提出了尾矿细砂制备干混砂浆生产线需要对烘干系统和筛分系统进行专门设计。 Abstract: The basic properties of fine tailings are tested. The production line of special mortar prepared iron tailings is introduced.The gradation combination of fine tailings is the key when fine tailings are prepared special mortar. The key technique of raw materials storage system, drying system, screening system, batching/weighing system, mixing system and bulk/packaging system are discussed. The drying system and screening system of production line should be specially designed.

黄天勇,陈旭峰,章银祥.尾矿细砂制备特种干混砂浆生产线的关键技术研究[J].混凝土与水泥制品,2017(7):66-69. HUANG T Y, CHEN X F, ZHANG Y X.Research on Key Technology of Special Mortar Production Line Prepared by Fine Tailing Sand[J].China Concrete and Cement Products,2017(7):66-69.

8度抗震设防地区既有教学楼隔震加固分析与设计

彭涛，刘焜，卫海

２０17年第7期

摘要

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摘要：某学校教学楼地处8度抗震设防地区，由于现行抗震规范的变化，使原有建筑物的承载力及抗震构造均不满足规范要求。为保障该校舍在地震中的安全性，结合校舍结构的特点和加固需求，采用隔震技术对其进行加固处理。本文介绍了该项目的设计要点，并选取7条地震波进行非线性时程分析。计算结果表明，隔震结构的水平向减震系数小于0.4，降低了上部结构所受的地震作用，提高了工程结构的安全性；相关成果对中小学砌体结构校舍抗震加固具有重要参考价值。 Abstract: Due to the change of the current seismic code, the existing bearing capacity and aseismic construction cannot meet the specification requirements for the teaching building with 8-degree of earthquake fortification intensity. To ensure the safety of this teaching building in the earthquake, the characteristics and reinforcement demand of this teaching building structure was analyzed. Combined with the characteristics of school buildings, seismic isolation technique was used to reinforce this teaching building. The key points of the design for this reinforcement project is projected, in which seven seismic waves were selected to conducted nonlinear time-history analysis. The results showed that the earthquake effect on the upper structure was reduced for the horizontal seismic decrease coefficient less than 0.4, and hence the safety of this building structure was improved. The conclusion can provide the reference for seismic strengthening of masonry structure in primary and secondary schools.

彭涛,刘焜,卫海.8度抗震设防地区既有教学楼隔震加固分析与设计[J].混凝土与水泥制品,2017(7):62-65. PENG T, LIU K, WEI H.Analysis and Design on Seismic Isolation Reinforcement of Teaching Building with 8-degree of Earthquake Fortification[J].China Concrete and Cement Products,2017(7):62-65.

透水砖透水系数测试方法的研究与改进

晋红强，王春阳，刘洋

２０17年第7期

摘要

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摘要：针对国家标准GB/T 25993—2010《透水路面砖与透水路面板》给出透水砖透水系数测试存在的问题，分析并提出了一种新的计算方法，基于该算法和机械制造原理设计出新的测试装置。在实验过程中，记录时间和透水圆筒水位高度的变化可实现透水系数的测定。利用MATLAB软件进行实验仿真模拟和计算处理，通过与已有装置的数据对比，改进装置具有精确度高、用水量少、测试样品规格多、实验周期短等优点，并且该装置操作简单，数据测量方便，易于实际应用。 Abstract：To deal with the problem that on the permeability coefficient test method given by GB/T 25993-2010 Permeable paving bricks & permeable paving flags, a new algorithm was proposed by analyzing the original way. Based on the modified formulae and technology of mechanical manufacture, a new test device was designed. In the test, the permeability coefficient can be obtained by recording the change of water level with time. Matlab was used to simulate and calculate in the experiment. Compared with the data of standard method, the new test method has a higher accuracy, less water consumption, more size of the test sample, efficiency and credibility. The device is easy to handle, thus the new method is convenient to use.

晋红强,王春阳,刘洋.透水砖透水系数测试方法的研究与改进[J].混凝土与水泥制品,2017(7):58-61. JIN H Q, WANG C Y, LIU Y.Study and Improvement of Test Method of Permeability Coefficient for Permeable Brick[J].China Concrete and Cement Products,2017(7):58-61.

秸秆粉煤灰轻质复合墙体成型技术

陈俊颖，姚勇，褚云朋，耿睿

２０17年第7期

摘要

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摘要：总结概括了既有复合墙体的类型及特点，提出了一种秸秆粉煤灰轻质复合墙体，介绍了该复合墙体的材料组成及特点，并详细阐述了该新型轻质复合墙体的成型技术。结果表明，秸秆粉煤灰轻质复合墙体能够充分利用工农业废弃物，减少对环境的影响，且能够达到轻质、高强的设计要求，符合绿色建造的发展理念。 Abstract: The existing types and characteristics of composite wall are summurized to propose a straw flyash light composite wall materials, the composition and characteristics of the composite wall are introduced, and the forming technology of the new light composite wall is also introduced. The results show that straw fly ash light composite wall can make full use of the industrial and agricultural waste, reducing environmental impact. Besides, it can achieve the design requirements of light weight and high strength, in line with the concept of green construction.

陈俊颖,姚勇,褚云朋,等.秸秆粉煤灰轻质复合墙体成型技术[J].混凝土与水泥制品,2017(7):55-57. CHEN J Y, YAO Y, CHU Y P,et al.Forming Technology of Straw Fly ash Light Composite Wall[J].China Concrete and Cement Products,2017(7):55-57.

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