第一期_2014_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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第一期

疏浚泥对混凝土性能的影响研究

朱盛胜1，翟宝宏2，梁敏3

２０14年第1期

摘要

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摘要：研究了疏浚泥对混凝土坍落度和力学性能的影响，并对掺疏浚泥混凝土的耐久性能进行了分析。结果表明，疏浚泥的掺入能有效降低混凝土坍落度；水胶比不变时，掺疏浚泥混凝土早期强度与基准混凝土一致，后期强度略有提高，且疏浚泥掺量在30%时，混凝土收缩增加，抗水渗透和抗氯离子渗透性能均有提高。 Abstract: The influence of dry dredged mud on the slump and mechanical properties of concrete is studied, and the durability of concrete with the dredged mud is analyzed. The results show that adding the dry dredged mud can reduce concrete slump; the early strength of concrete with dredged mud is almost consistent with that of the normal concrete, and the later strength of the concrete improve slightly when having the same water-cement ratio. In addition, the shrinkage of concrete increases and the performances of the resistance to water penetration and chloride ion penetration improve when the content of dredged mud is 30%.

高铝煤矸石活化及在灌浆料中的应用研究

杨飞华2，程海丽1，张杰3

２０14年第1期

摘要

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摘要：以内蒙古某地高铝煤矸石为研究对象，采用胶砂强度法研究了其最佳热活化条件，并将活化后的煤矸石分别取代水泥和掺合料硅灰应用于水泥基灌浆料中。结果表明，该高铝煤矸石的最佳热活化温度为800℃；活化高铝煤矸石替代水泥基灌浆料中的水泥时，可使其流动度下降，但替代其掺合料硅灰时，可使其流动度增加；活化高铝煤矸石无论是替代灌浆料中的水泥还是硅灰，均可使灌浆料的凝结时间缩短；活化高铝煤矸石替代灌浆料中的水泥时，对初期强度不利，但7d后强度均有不同程度提高，活化高铝煤矸石替代灌浆料中的硅灰时，可提高其强度，取代率越大，提高幅度越大，完全取代效果最好。 Abstract: The heat-activated condition of high alumina coal gangue in Neimenggu is studied, and then, the activated coal gangue is used in grouting material to study the application effect. The result shows that the optimal calcining temperature of high alumina coal gangue is 800℃. The fluidity of the grouting material decreases when Portland cement is replaced by the activated coal gangue, but increases when silica fume is replaced. Adding the activated coal gangue can shorten the setting time of grouting material. The compressive strength of the grouting material enhances when silica fume is replaced by activated coal gangue powder, and the more the replacement ratio, the greater the strength; the compressive strength of grouting material enhances when cement is replaced by activated coal gangue powder after 7d,but decreases in1d.

建筑垃圾再生混合砂砂浆性能正交试验研究

刘俊华1，刘凤利2，张承志2

２０14年第1期

摘要

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摘要：将废混凝土、废砖再生粗砂和特细砂混合后得到建筑垃圾再生混合砂，研究了水胶比、建筑垃圾再生粗砂取代率和粉煤灰取代率对砂浆性能的影响，通过正交层次分析、方差分析和综合评分法，得出再生砂浆的最佳配合比。结果表明，水胶比和粉煤灰取代率是影响再生砂浆性能的主要因素，粉煤灰取代率增大对再生砂浆强度具有较大的劣化作用，建筑垃圾再生粗砂取代率对砂浆稠度的影响较大，对抗压强度和抗折强度的影响最小。 Abstract: Recycled construction waste mixed sand was obtained by mixing recycled concrete coarse sand, recycled brick coarse sand and ultra fine sand. The effect of the recycled aggregate replacement ratio, the water-binder ratio and the fly ash replacement ratio on the performances of recycled mortar is researched. By analytic hierarchy process, variance analysis and the method of synthetically judgment，the optimal proportion was obtained. The results show that the water-binder ratio and the fly ash replacement ratio are the key factors for the performances of recycled mortar. The increasing of fly ash replacement ratio has negative effect on recycled mortar strength. The recycled aggregate replacement ratio has a significant impact on consistency and minimal impact on compressive strength and bending strength.

单元式ALC整间墙板制作施工技术

张永生1，刘艳军2，孟胜国1，李达1

２０14年第1期

摘要

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摘要：蒸压轻质加气混凝土（ALC）板具有重量轻, 隔音、隔热效果好，耐火和环保性好等优点。本文介绍了ALC整间墙板制作过程及施工技术，总结了其过程中的缺陷和经验。 Abstract: Autoclaved Light-weight Concrete (ALC) board has many advantages, such as light weight, good sound insulation, heat insulation effect, good fire resistance and environmental protection. Here, the production process and construction technology of the whole ALC wallboard are introduced, and some defects and experience in these processes are summarized.

室外温、湿度波动对现浇钢筋混凝土楼板非使用荷载裂缝影响的试验研究

江怀雁

２０14年第1期

摘要

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摘要：为了研究室内外温度、湿度波动对现浇钢筋混凝土楼板非使用荷载裂缝产生的影响，在实际环境中设计建造了足尺的砖混结构模型，对室内、室外的温度和湿度及无使用荷载作用楼板开裂前后板面混凝土的应变进行了5个月的测量。实测数据分析表明，室外温度波动对楼板混凝土应变有明显影响，可以使楼板发生应力疲劳而提前开裂，但湿度波动对裂缝影响较小；室内的温度和湿度波动与室外相比，呈现明显的衰减和滞后规律；楼板边界的梁和墙体也存在收缩应变，其对楼板收缩变形的约束有限，由此而产生的楼板拉应力较小；做好建筑物外表面隔热处理对减少楼板开裂是有益的。 Abstract: A full scale mixed structure model with 2 test floor slabs was built in real environment to study the influence of temperature and humidity fluctuation on non-service-load cracks in cast-in-situ RC floor slab. Outdoor and indoor temperature, humidity and the strain of slabs concrete before and after cracking without service load were measured for five months. The test results indicate that fluctuation of outdoor temperature has obvious influence on the strain of the floor slab, which leads to stress fatigue in slab concrete, and the slab can crack easier, but the humidity fluctuation has little influence on slab cracking; comparing with the temperature and humidity fluctuation in outdoor, the temperature and humidity fluctuation in indoor show the regularity of decrement and delay; in addition, the beams and walls on the edges of floor slab has a certain of shrink, so the boundary restraint to the shrinkage of floor slab is limited and the tensile stress in slab is smaller; It is helpful to reduce cracking in floor slabs by taking better thermal insulation measures to external surface of a building.

复合型混凝土多孔保温砖在节能型村镇住宅中的应用

朱永明1，管文2，黄新琦3

２０14年第1期

摘要

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摘要：研究了复合型混凝土多孔保温砖的基本物理性能以及复合型混凝土多孔砖应用于村镇住宅砖混结构的热工性能，并分析了经济性能，可为丰富和发展村镇建设的建筑节能技术提供技术支撑。 Abstract: The basic physical properties of composite concrete perforated bricks and the thermal performance of brick-concrete structure for rural residence are studied. In addition, the economic performance of the composite concrete perforated bricks is analyzed, which can help to develop the energy-saving technology of rural residence.

钢筋混凝土纯扭构件的非线性有限元分析

刘宝兴，邵永健，杨文成

２０14年第1期

摘要

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摘要：为研究钢筋混凝土构件在扭矩作用下的受力性能，利用有限元软件ABAQUS建立了3个钢筋混凝土纯扭构件的有限元模型，分别以截面尺寸和配箍率为研究参数，对其受力全过程进行非线性数值模拟。有限元计算结果表明：截面尺寸和配箍率是影响钢筋混凝土构件抗扭承载力的重要因素，增大截面尺寸可提高构件的开裂扭矩和极限扭矩，增加配箍率可延缓裂缝的发展，提高构件的极限扭矩；模拟得到的开裂扭矩、极限扭矩与GB 50010—2010《混凝土结构设计规范》的计算公式得出的计算值吻合较好。 Abstract： In order to study the torsional behavior of reinforced concrete members，three kinds of finite element models with different parameters(including the sectional dimension and stirrup reinforcement ratio) are established to simulate the pure torsion of the reinforced concrete members by nonlinear finite element analysis software of ABAQUS. The results show that the section dimension and stirrup reinforcement ratio are the key factors for the torsional capacity of reinforced concrete members. The cracking torque and ultimate torque of the members can be improved with the increasing of section dimension. The development of cracks can be delayed and the ultimate torque of the members can be improved with the increasing of stirrup reinforcement ratio. The cracking torque and ultimate torque of simulation are in good agreement with the calculation values got by the formulae of GB 50010—2010“code for design of concrete structures”.

玻化微珠保温混凝土受压力学性能试验研究

冯文党，刘元珍，李珠

２０14年第1期

摘要

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摘要：通过玻化微珠保温混凝土立方体抗压强度与棱柱体轴心抗压强度正交试验，研究了试件的破坏形态，分析了水灰比、水泥用量等因素对混凝土受压强度影响的主次顺序，确定了抗压强度最优配比方案，建立了混凝土立方体抗压强度与轴心抗压强度关系式。 Abstract: Based on the orthogonal experiments of compressive strength and axial compressive strength of cube specimens of glazed hollow bead insulation concrete, the failure modes of the concrete specimens are studied. The?influencing order of the factors such as water-cement ratio, cement content etc. on the compressive strength of the concrete is analyzed and discussed, the optimum mix proportion of concrete is determined. In addition, the relationship between the compressive strength and the axial compressive strength of the concrete is put forward.

基于m、k法的轻骨料混凝土组合楼板纵向剪切粘结性能模拟分析

宋泽钊1，张燕坤1，韩延霄2

２０14年第1期

摘要

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摘要：利用ANSYS对压型钢板—轻骨料混凝土组合楼板进行了建模分析，得到了极限荷载、跨中最大挠度和板端相对滑移值，并采用欧洲规范4的建议公式，回归得出组合楼板的剪力粘结系数m、k，可为该种楼板的工程设计提供参考依据。 Abstract: The ANSYS software is used in the analogue simulation of the composite slab (profiled steel sheet-lightweight aggregate concrete), and the ultimate load, maximum deflection and longitudinal slide values of each slab are obtained after calculating the program. Based on the test results, the shearing bond coefficients (m, k) of the composite slab are defined with regression analysis by using the suggested formula of Eurocode 4, which can be used in practical design.

钢纤维和聚合物乳液对水泥混凝土抗冲击与磨耗性能影响及机理分析

梅迎军1，张昶2，徐建平3，魏河广2，樊文胜3

２０14年第1期

摘要

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摘要：通过对混凝土试样进行抗冲击与磨耗试验测试，得到了SBR乳液改性水泥混凝土（SBR质量掺量为0～18%）、钢纤维混凝土（钢纤维体积掺量为0～1.2%）和钢纤维聚合物水泥混凝土单位面积磨损量与抗冲击韧性，分析了钢纤维和聚合物乳液对水泥混凝土抗冲击与磨耗性能影响规律及作用机理。研究结果表明，钢纤维和SBR乳液提高了混凝土抗冲击与耐磨性能，且随着掺量增加，作用效果越好；钢纤维和聚合物乳液复掺对改善混凝土抗冲击、磨耗性能优于钢纤维和聚合物乳液单掺。Abstract:Theabrasionweightloseperunitareaandimpactresistanceofconcreteswereacquiredbymeansofimpactandweartestoncementconcrete,thosetestedconcretesincludeSBRlatexmodifiedcementconcrete(0～18%massfraction),steelfiberreinforcedconcrete(0～1.2%volumefraction),steelfiberandSBRlatexmodifiedcementconcrete.Theinfluencelawandtheactionmechanismofsteelfiberandpolymerlatexontheimpactandabrasionresistanceofthesecementconcreteswerestudied.TheresultsshowthattheadditionofsteelfiberandSBRlatexareabletoimprovetheimpactandabrasionresistanceofcementconcrete,theeffectenhanceswithincreasingthecontentofsteelfiberandSBRlatex,andtheeffectsofcompositeadditivesarebetterthanthatofsingleadditive.

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