第十期_2021_《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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第十期

闪长玢岩的吸水特性及其对混凝土施工性能的影响研究

潘金敢1，王子龙1，柏立果1，程猛2，毛永琳2

2021年第10期

摘要

引用本文

摘要：测试了闪长玢岩的吸水特性，研究了闪长玢岩作为粗骨料对混凝土施工性能的影响。结果表明：闪长玢岩碎石内部的裂隙、孔隙较发达，吸水率高，但吸水速率慢；闪长玢岩的掺入使得混凝土拌合物的流动性损失显著增加，泌水率降低；采用骨料预湿工艺和掺减水剂的方法可以解决闪长玢岩混凝土的施工性能问题。 Abstract: The water absorption characteristics of diorite porphyrite was tested, and its influence on the construction performance of concrete was studied. The results show that the fissures and pores in the diorite porphyrite are relatively developed, and the water absorption is high, but the water absorption rate is slow. The addition of diorite porphyrite significantly increases the fluidity loss of concrete mixture and reduces the bleeding rate. The problem of construction performance of diorite porphyrite concrete can be solved by using aggregate pre-wetting technology and adding water reducing agent.

潘金敢,王子龙,柏立果,等.闪长玢岩的吸水特性及其对混凝土施工性能的影响研究[J].混凝土与水泥制品,2021(10):95-99. PAN J G,WANG Z L,BAI L G,et al.Study on Water Absorption Characteristics of Diorite Porphyrite and Its Influence on the Construction Performance of Concrete[J].China Concrete and Cement Products,2021(10):95-99.

纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响

田翔，陈佩圆，娄星，李进

2021年第10期

摘要

引用本文

摘要：研究了纳米SiO2掺量对掺膨胀剂碱矿渣砂浆抗压强度、自收缩、干燥收缩和孔隙率的影响。结果表明：膨胀剂的掺入有助于减少碱激发矿渣砂浆的自收缩和干燥收缩，但会显著降低早期强度；掺入2%纳米SiO2可基本补偿由于掺入膨胀剂造成的强度损失，且对碱矿渣砂浆自收缩和干燥收缩的影响较小；适量纳米SiO2的掺入可显著降低掺膨胀剂碱矿渣砂浆的孔隙率。 Abstract: The effects of nano-SiO2 content on the compressive strength, self-shrinkage, dry shrinkage and porosity of the alkali-activated slag mortar(AASM) with expansion agent were analyzed. The results show that the addition of expansive agent can reduce the self-shrinkage and dry shrinkage of AASM, but can significantly reduce its early strength. The addition of 2% nano-SiO2 can basically compensate the strength loss caused by the addition of expansive agent, and has little effect on the self-shrinkage and dry shrinkage of AASM. Appropriate amount of nano-SiO2 can significantly reduce the porosity of AASM with expansion agent.

田翔,陈佩圆,娄星,等.纳米SiO2对掺膨胀剂碱矿渣砂浆力学及收缩性能的影响[J].混凝土与水泥制品,2021(10):91-94. TIAN X,CHEN P Y,LOU X,et al.Effect of Nano-SiO2 on Mechanical and Shrinkage Properties of Alkali-activated Slag Mortar with Expansion Agent[J].China Concrete and Cement Products,2021(10):91-94.

废玻璃粉对高延性水泥基复合材料性能的影响

李碧雄，张治博，汪知文

2021年第10期

摘要

引用本文

摘要：采用粒径为75~300 μm的废玻璃粉取代部分河砂制备了高延性水泥基复合材料（HDCC），研究了废玻璃粉取代率(10%、20%、30%)对HDCC抗压、抗拉和抗弯性能以及流动性的影响。结果表明：废玻璃粉的掺入提高了HDCC的流动度；HDCC的抗压强度随废玻璃粉取代率的增加而增大；当废玻璃粉取代率为10%时，HDCC的拉伸性能略有改善，取代率继续增大时，抗拉性能劣化；随废玻璃粉取代率的增加，HDCC的弯曲韧性降低，裂缝数量减少，裂缝宽度增大。此外，拉伸过程中废玻璃粉对PVA纤维有刮伤，削弱了PVA纤维的拉伸性能，导致HDCC的抗拉强度和抗弯强度降低。 Abstract： High ductility cementitious composites (HDCC) were prepared by replacing part of river sand with waste glass powder with a particle size of 75~300 μm, and the effects of waste glass powder replacement rates(10%、20%、30%) on the compressive, tensile and flexural properties and fluidity of HDCC were studied. The results show that the fluidity of HDCC is improved by adding waste glass powder. The compressive strength of HDCC increases with the increase of waste glass powder replacement rate. When waste glass powder replacement rate is 10%, the tensile properties of HDCC are slightly improved, and the tensile properties are deteriorated when the replacement rate continues to increase. With the increase of waste glass powder replacement rate, the bending toughness of HDCC decreases, the number of cracks decreases and the width of cracks increases. In addition, the waste glass powder scratches PVA fiber during the tensile process, which weakens the tensile properties of PVA fiber, thus resulting in the decrease of tensile strength and bending strength of HDCC.

李碧雄,张治博,汪知文.废玻璃粉对高延性水泥基复合材料性能的影响[J].混凝土与水泥制品,2021(10):86-90,94. LI B X,ZHANG Z B,WANG Z W.Influence of Waste Glass Powder on the Properties of High Ductility Cementitious Composites[J].China Concrete and Cement Products,2021(10):86-90,94.

沥青搅拌站废粉对混凝土力学与耐久性能的影响研究

张兰峰1，王恒昌2，蓝亚明3，胡胜1，邓再桔1

2021年第10期

摘要

引用本文

张兰峰,王恒昌,蓝亚明,等.沥青搅拌站废粉对混凝土力学与耐久性能的影响研究[J].混凝土与水泥制品,2021(10):81-85. ZHANG Lan-feng, WANG Heng-chang, LAN Ya-ming,et al.Study on the Effect of Waste Powder From Asphalt Mixing Station on the Mechanical and Durability of Concrete[J].China Concrete and Cement Products,2021(10):81-85.

不锈钢管与钢纤维增强再生混凝土组合柱的轴压性能研究

黄波1，张亮2，翟江棚3

2021年第10期

摘要

引用本文

摘要：研究了不同再生骨料替代率下，不锈钢管与钢纤维增强再生混凝土组合柱的轴压性能，获得了试件的破坏形态、荷载-位移曲线和轴压刚度。结果表明：根据荷载-位移曲线的变化特征，可将试件按承载力稳定性分为不稳定和稳定两类；不稳定试件峰值荷载后的荷载-位移曲线快速探底，此后荷载开始缓慢提升，轴向变形快速增大；稳定试件峰值荷载后的荷载-位移曲线沿水平方向发展，试件的持荷能力突出；试件的轴压刚度在0.3~0.9倍的峰值荷载时达到最大，此时钢与混凝土的材料损伤相对较小，钢管对混凝土的约束效应相对有效；随着再生骨料替代率的增大，试件的轴压刚度逐渐降低；钢纤维抑制了裂缝的发展，维护了混凝土的整体性，从而提高了试件的轴压刚度。 Abstract： The axial compression performance of stainless steel pipe and steel fiber reinforced recycled concrete composite columns with different recycled aggregate replacement rates was studied, and the failure mode, load-displacement curve and axial compression stiffness were obtained. The results show that according to the characteristics of load-displacement curve, the specimens can be divided into unstable and stable types according to the bearing capacity stability. The load-displacement curve of the unstable specimen after the peak load quickly reaches the bottom, after which the load starts to increase slowly, and the axial deformation increases rapidly. The load-displacement curve of the stable specimen after the peak load develops in the horizontal direction, and the load-holding capacity of the specimen is outstanding. The axial compression stiffness of the specimen reaches the maximum when the load is 0.3~0.9 times of the peak load, and at this time, the material damage of steel and concrete is relatively small, and the restraint effect of steel pipe on concrete is relatively effective. With the increase of the replacement rate of recycled aggregate, the axial compression stiffness of the specimen decreases gradually. The steel fiber inhibits the development of cracks and maintains the integrity of the concrete, thereby improving the axial stiffness of the specimen.

黄波,张亮,翟江棚.不锈钢管与钢纤维增强再生混凝土组合柱的轴压性能研究[J].混凝土与水泥制品,2021(10):77-80. HUANG B,ZHANG L,ZHAI J P.Study on Axial Compression Performance of Stainless Steel Pipe and Steel Fiber Reinforced Recycled Concrete Composite Columns[J].China Concrete and Cement Products,2021(10):77-80.

不同隔振方案下混凝土框架结构的抗震性能对比与优化分析

卢红霞1，周振纲2

2021年第10期

摘要

引用本文

摘要：为了分析和对比不同隔振方案下混凝土框架结构的抗震性能，建立了混凝土框架三维模型，设定基础隔振、2层隔振、4层隔振和6层隔振四种隔振方案，对地震输入参数和隔振支座参数进行了研究，依据SAP软件内置的EL波和CPC波，分析了模型的基础剪应力、层间剪应力和顶层结构加速变化规律。结果表明：不同地震波输入后，有隔振的模型层间剪应力、基础剪应力和顶层加速度相较于无隔振方案均大幅降低，但水平方向上差别不大；采用基础隔振和2层隔振后，模型的基础剪应力从10 988~13 666 kN降至2 366~3 544 kN，降低幅度达73%~81%；四种隔振方案的综合评价值分别为0.89、0.91、0.83和0.70，其中，2层隔振方案的施工成本和抗震性能均最优，基础隔振方案次之，但施工成本稍高，4层和6层隔振方案较差。 Abstract: In order to analyze and compare the seismic performance of concrete frame structure under different vibration isolation schemes, a three-dimensional model of concrete frame structure was established, and four vibration isolation schemes were set for foundation vibration isolation, 2-story vibration isolation, 4-story vibration isolation, and 6-story vibration isolation, and the seismic input parameters and vibration isolation support parameters were studied. According to the built-in EL wave and CPC wave of SAP software, the variation laws of foundation shear stress, interlayer shear stress and acceleration of top structure of the model were analyzed. The results show that after different seismic waves are input, the interlayer shear stress, foundation shear stress and top floor acceleration of the vibration isolation model are significantly reduced compared with those without vibration isolation scheme, but there is little difference in the horizontal direction. For foundation vibration isolation and 2-story vibration isolation, the foundation shear stress of the model decreases from 10 988~13 666 kN to 2 366~3 544 kN, with a reduction range of 73%~81%. The comprehensive evaluation values of the four vibration isolation schemes are 0.89, 0.91, 0.83 and 0.70 respectively. Among them, the construction cost and seismic performance of the 2-story vibration isolation scheme are the best, and the foundation vibration isolation scheme is the second, but the construction cost is slightly higher, and the 4-story and 6-story vibration isolation schemes are poor.

卢红霞,周振纲.不同隔振方案下混凝土框架结构的抗震性能对比与优化分析[J].混凝土与水泥制品,2021(10):72-76. LU H X,ZHOU Z G.Analysis of Seismic Performance of Concrete Frame Structure Under Different Vibration Isolation Schemes[J].China Concrete and Cement Products,2021(10):72-76.

灌浆接头单向拉伸性能的研究分析

佟晓超，王博，昌文芳，崔德奎

2021年第10期

摘要

引用本文

摘要：研究了灌浆料和钢筋之间的黏结强度与灌浆料抗压强度的关系，分析了利用新型工艺制造的套筒是否满足JGJ 355—2015《钢筋套筒灌浆连接应用技术规程》的要求，并通过既有168个钢筋拔出试验数据验证了黏结强度与灌浆料抗压强度之间的线性关系。结果表明：黏结强度与灌浆料抗压强度存在强相关性；利用滚压、挤压、铸造和切削工艺制得的套筒均满足JGJ 355—2015对于连接件破坏的要求。 Abstract: The relationship between the bond strength of grouting materials and steel bar and the compressive strength of grouting materials was studied, and whether the sleeve made by the new technology could meet the requirements of JGJ 355—2015 Technical Specification for Groute Sleeve Splicing of Rebars was analyzed. The linear relationship between the bond strength and the compressive strength of grouting materials was verified by using the existing datas of 168 rebar pulling out tests. The results show that there is a strong correlation between bond strength and compressive strength of grouting materials. The sleeves made by rolling, extrusion, casting and cutting process can meet the requirements of JGJ 355—2015 for connection failure.

佟晓超,王博,昌文芳,等.灌浆接头单向拉伸性能的研究分析[J].混凝土与水泥制品,2021(10):67-71. TONG X C,WANG B,CHANG W F,et al.Research and Analysis of Uniaxial Tensile Properties of Grouting Joints[J].China Concrete and Cement Products,2021(10):67-71.

超轻泡沫混凝土结构断层成因及抑制措施研究

杨俊1,2，杨鼎宜1，王武祥2,3，刘晓通4，张磊蕾2,3，王爱军2，吴子豪2

2021年第10期

摘要

引用本文

摘要：研究了超轻泡沫混凝土结构断层成因及抑制措施。结果表明：水胶比、浆体温度、速凝剂和纤维掺量对超轻泡沫混凝土中结构断层的形成有重要影响；通过改善发泡浆体的性能、优化水温及速凝剂掺量来平衡料浆的发泡速率和凝结硬化速率、添加纤维来提高多孔结构抵抗内应力的能力，均能有效解决超轻泡沫混凝土结构断层问题；适宜的技术参数为：水胶比控制在0.885~0.965之间，水温设定为30 ℃，速凝剂掺量为6.0%，纤维掺量不低于0.75%。 Abstract: The causes of structural faults and the suppression measures of ultra light foamed concrete were studied. The results show that the water-binder ratio, slurry temperature, accelerating agent and fiber content have important effects on the formation of structural faults in ultra light foamed concrete. The fault problem of ultra light foamed concrete structure can be effectively solved by improving the performance of the foamed slurry, optimizing the water temperature and the accelerating agent content to balance the foaming rate and setting and hardening rate of the slurry, and adding fibers to improve the ability of the porous structure to resist internal stress. The suitable technical parameters are as follows: water-binder ratio is controlled between 0.885 and 0.965, water temperature is 30 ℃, accelerator agent content is 6.0%, fiber content is not less than 0.75%.

杨俊,杨鼎宜,王武祥,等.超轻泡沫混凝土结构断层成因及抑制措施研究[J].混凝土与水泥制品,2021(10):62-66. YANG J,YANG D Y,WANG W X,et al.Study on Causes and Restraining Measures of Ultra Light Foamed Concrete Structure Faults[J].China Concrete and Cement Products,2021(10):62-66.

交变荷载作用下CFRP布加固RC梁耐久性能试验研究

王吉文1，杜晓明2，袁振圣3

2021年第10期

摘要

引用本文

摘要：为了探究CFRP布加固钢筋混凝土梁（RC梁）在交变荷载作用下的耐久性，对8根CFRP布加固RC梁进行了恒载和交变荷载作用下的15 d、30 d老化试验，并通过三点弯曲试验得到了试验梁在不同荷载作用下的破坏模式、极限荷载、极限应变、弯曲性能、裂缝数量以及裂缝宽度。结果表明：经交变荷载作用15 d、30 d后，CFRP布加固RC梁的力学性能下降显著，试验梁的极限荷载、剥离荷载与极限应变均呈下降趋势；与相同龄期下的恒载（24 kN）相比，交变荷载作用15 d、30 d后，试验梁的极限应变平均降低了11.44%、15.23%；交变载荷作用下CFRP布加固RC梁的抗裂性能与弯曲性能减弱程度比恒载作用更显著。 Abstract: In order to explore the durability of reinforced concrete(RC) beams strengthened with CFRP sheets under alternating loads, eight CFRP cloth-reinforced RC beams were subjected to 15 d and 30 d aging tests under dead and alternating loads, and the failure mode, ultimate strain, bending properties, crack number and crack width of test beams under different loads were obtained through the three-point bending tests. The results show that after 15 d and 30 d of alternating loads, the mechanical properties of RC beams strengthened with CFRP sheets decrease significantly, and the ultimate load, peeling failure load and ultimate strain of the test beams decrease. Compared with the dead load(24 kN) under the same age, the ultimate strain of the test beam is reduced by 11.44% and 15.23% on average after the alternating loads is applied for 15 d and 30 d. The crack resistance and bending properties of the test beams under alternating loads is weaker than that under dead loads.

王吉文,杜晓明,袁振圣.交变荷载作用下CFRP布加固RC梁耐久性能试验研究[J].混凝土与水泥制品,2021(10):57-61. WANG J W,DU X M,YUAN Z S.Experimental Study on Durability of RC Beams Strengthened with CFRP Sheets Under Alternating Loads[J].China Concrete and Cement Products,2021(10):57-61.

BFRP增强水泥砂浆薄板力学性能试验研究

刘蒲云1，雷梦珂2,3，汪昕2,3，王凯辉2,3

2021年第10期

摘要

引用本文

摘要：通过四点弯曲试验和拉伸试验研究了灰砂比、增强材料种类及布置方式对水泥砂浆薄板力学性能的影响。结果表明：增大灰砂比能提高试件的弯曲开裂荷载；缩小BFRP筋的筋网尺寸能提高试件的极限荷载；增大BFRP网格厚度能改善试件的拉伸能力；掺短切玄武岩纤维的BFRP网格增强试件的抗弯和抗拉能力较好，是FRP永久模板的优选方案。 Abstract: Through four-point bending test and tensile test, the effect of cement-sand ratio, reinforcement material type and layout method on the mechanical properties of cement mortar slab was studied. The results show that the increase of cement-sand ratio can enhence the bending cracking load of the specimen. Reducing the size of BFRP bar mesh can increase the ultimate load of the specimen. Increasing the thickness of the BFRP mesh can improve the tensile capacity of the specimen. The BFRP mesh reinforced specimen mixed with chopped basalt fiber has good flexural and tensile capacity, which is the preferred scheme of FRP permanent formwork.

刘蒲云,雷梦珂,汪昕,等.BFRP增强水泥砂浆薄板力学性能试验研究[J].混凝土与水泥制品,2021(10):52-56,61. LIU P Y,LEI M K,WANG X,et al.Experimental Study on Mechanical Properties of BFRP Reinforced Cement Mortar Slab[J].China Concrete and Cement Products,2021(10):52-56,61.

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