2024_2024_《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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2024

固废基胶凝材料的粒度分布与其性能的关联度

张艳佳1，2，张广田1，2，*，于海洋1，2，贺光炜1，2

2024年第4期

摘要

引用本文

摘要：以矿渣、钢渣、脱硫石膏、粉煤灰为主要原材料制备了固废基胶凝材料，研究了粉磨时间（5、10、15 min）对固废基胶凝材料比表面积、粒度分布、标准稠度用水量和胶砂抗压强度的影响，并通过灰色关联分析方法探究了固废基胶凝材料的粒度分布与标准稠度用水量和抗压强度之间的关联度。结果表明：随着粉磨时间的增加，固废基胶凝材料的细度、比表面积、标准稠度用水量和胶砂抗压强度均增大；固废基胶凝材料的标准稠度用水量和胶砂的抗压强度均与粒度小于20 μm的颗粒含量呈正相关，与粒度大于等于20 μm的颗粒含量呈负相关；适当减少粒度10~20 μm的颗粒含量或增加粒度20~32 μm的颗粒含量，均可在一定程度上降低固废基胶凝材料的标准稠度用水量；增加粒度0~3 μm、10~20 μm的颗粒含量分别有助于提高胶砂的3 d、28 d抗压强度。 Abstract: Solid waste based cementitious materials were prepared by using slag, steel slag, desulfurization gypsum, and fly ash as the main raw materials. The effects of grinding time(5, 10, 15 min) on the specific surface area, particle size distribution, and water requirement of normal consistency of solid waste based cementitious materials, and compressive strength of the mortar were studied. The correlation degree between particle size distribution of solid waste based cementitious materials and water requirement of normal consistency, and compressive strength was explored through grey correlation analysis method. The results show that as the grinding time increases, the fineness, specific surface area, and water requirement of normal consistency of solid waste based cementitious materials, and compressive strength of the mortar all increase. The water requirement of normal consistency of solid waste based cementitious materials and the compressive strength of the mortar are positively correlated with the content of particles with particle size less than 20 μm, and negatively correlated with the content of particles with particle size greater than or equal to 20 μm. By appropriately reducing the content of particles with particle size of 10~20 μm or increasing the content of particles with particle size of 20~32 μm, the water requirement of normal consistency of solid waste based cementitious materials can be reduced to a certain extent. Increasing the content of particles with particle size of 0~3 μm and 10~20 μm respectively helps to improve the 3 d and 28 d compressive strength of the mortar.

张艳佳,张广田,于海洋,等.固废基胶凝材料的粒度分布与其性能的关联度[J].混凝土与水泥制品,2024(4):87-90,95. ZHANG Y J,ZHANG G T,YU H Y+,et al.Correlation degree between particle size distribution and performance of solid waste based cementitious materials[J].China Concrete and Cement Products,2024(4):87-90,95.

主塔C60大体积混凝土配合比设计及性能研究

盖珂瑜1，2，龙勇1，2，蒋本俊1，3，王宇1，2，周毅1，2，李晨1，2

2024年第4期

摘要

引用本文

摘要：研究了粉煤灰单掺、粉煤灰与矿渣粉或降黏剂复掺对主塔C60大体积混凝土工作性、力学性能、绝热温升和收缩性能的影响。结果表明：掺入适量降黏剂提高了混凝土的流动性，而掺入矿渣粉降低了混凝土的流动性，但仍满足施工要求；与单掺粉煤灰的试验组相比，复掺适量降黏剂提高了混凝土的抗压强度和弹性模量，降低了绝热温升和自收缩，对劈裂抗拉强度和干燥收缩的影响较小，而复掺适量矿渣粉后，混凝土的7 d抗压强度略有降低，28 d、60 d抗压强度增大，弹性模量增大，绝热温升和干燥收缩降低，28 d劈裂抗拉强度和自收缩变化不大。 Abstract: The effects of single addition of fly ash, compound addition of fly ash and slag powder or viscosity reducer on the workability, mechanical properties, adiabatic temperature rise, and shrinkage performance of C60 mass concrete for main tower were studied. The results show that adding an appropriate content of viscosity reducer improves the flowability of concrete, while adding slag powder reduces the flowability of concrete, but still meets the construction requirements. Compared with the experimental group with a single addition of fly ash, adding an appropriate content of viscosity reducer increases the compressive strength and elastic modulus of concrete, reduces adiabatic temperature rise and self shrinkage, and has a smaller impact on splitting tensile strength and dry shrinkage. However, after adding an appropriate content of slag powder, the 7 d compressive strength of concrete slightly decreases, while the 28 d and 60 d compressive strength increase, the elastic modulus increases, the adiabatic temperature rise and dry shrinkage decrease, and the 28 d splitting tensile strength and self shrinkage do not show significant changes.

盖珂瑜,龙勇,蒋本俊,等.主塔C60大体积混凝土配合比设计及性能研究[J].混凝土与水泥制品,2024(4):91-95. GE K Y,LONG Y,JIANG B J,et al.Mix proportion design and performance study of C60 mass concrete for main tower[J].China Concrete and Cement Products,2024(4):91-95.

超细粉煤灰特性及其在混凝土中的应用研究

王玉斌1，尹韶宁2，潘栋2，李梓源1，王娜1，3，袁鹏2

2024年第4期

摘要

引用本文

摘要：制备了不同细度（674、810、1 126 m2/kg）的超细粉煤灰，研究了其掺量（0~25%）对水泥-超细粉煤灰胶凝材料性能的影响，分析了掺不同细度超细粉煤灰混凝土的工作性、力学性能和耐久性能。结果表明：超细粉煤灰的强度活性指数和需水量比均随着其细度的增加而增大；用0~25%的超细粉煤灰替代P·O 42.5级水泥后，胶凝材料的初凝、终凝时间分别延长了11~71 min、13~74 min；与未掺超细粉煤灰的混凝土相比，掺超细粉煤灰混凝土的坍落度提高，3 d和7 d抗压强度相差不大，28、56、90 d抗压强度均有所提高，抗碳化性能和抗硫酸盐侵蚀性能均有所提升。 Abstract: Ultrafine fly ash with different fineness (674, 810, 1 126 m2/kg) was prepared, and the effects of its content (0~25%) on the properties of cement-ultrafine fly ash cementitious materials was studied. The workability, mechanical properties, and durability of concrete with different fineness ultrafine fly ash were analyzed. The results show that the strength activity index and water demand ratio of ultrafine fly ash increase with the increase of the fineness. After replacing P·O 42.5 cement with 0~25% content of ultrafine fly ash, the initial setting time and final setting time of the cementitious materials are extended by 11~71 min and 13~74 min, respectively. Compared with the concrete without ultrafine fly ash, the slump of concrete with ultrafine fly ash is increased, the 3 d and 28 d compressive strength are not significantly different, the 28 d, 56 d, and 90 d compressive strength are increased, and the carbonation resistance and sulfate corrosion resistance are improved.

王玉斌,尹韶宁,潘栋,等.超细粉煤灰特性及其在混凝土中的应用研究[J].混凝土与水泥制品,2024(4):96-100. WANG Y B,YIN S N,PAN D,et al.Study on characteristics of ultrafine fly ash and its application in concrete[J].China Concrete and Cement Products,2024(4):96-100.

基于电磁感应原理的钢筋钢纤维混凝土无损检测方法研究

叶芳1，2，赵鹏1，2，施俊航3，吴仁杰3，陈柯宇3，夏晋3，*

2024年第4期

摘要

引用本文

摘要：采用基于电磁感应原理的无损检测方法，研究了混凝土中钢纤维的体积掺量（0~1.85%）、钢筋的直径（6~20 mm）、间距（100 mm、200 mm）和保护层厚度（20 mm、40 mm）与电磁信号值的关系。结果表明：随着钢纤维体积掺量的增加，电磁信号值增大；随着钢筋直径的增加，电磁信号值基本呈增大趋势；钢筋的间距和保护层厚度越大，电磁信号值越小；钢筋钢纤维混凝土的电磁信号值由钢纤维与钢筋产生的电磁信号值叠加而成；当钢筋间距大于100 mm时，相邻钢筋之间的电磁信号基本无影响；根据电磁信号波谷均值可检验和评定钢筋钢纤维混凝土中的钢纤维体积掺量是否合格；根据曲线的峰值和峰值出现位置可检验钢筋直径和钢筋所在位置是否合格。 Abstract: Using a non-destructive testing method based on the electromagnetic induction principle, the relationship between the volume content (0~1.85%) of steel fiber in concrete, the diameter (6~20 mm), spacing (100 mm, 200 mm), and protective layer thickness(20 mm, 40 mm) of steel bar with electromagnetic signal values was studied. The results show that as the volume content of steel fiber increases, the electromagnetic signal value increases. As the diameter of steel bar increases, the electromagnetic signal value generally shows an increasing trend. The larger the spacing and the protective layer thickness, the smaller the electromagnetic signal value. The electromagnetic signal value of steel reinforced concrete with steel fiber is formed by the superposition of the electromagnetic signal values generated by the steel fiber and the steel bar. When the spacing between steel bars is greater than 100 mm, the electromagnetic signal between adjacent steel bars has little effect. According to the mean valley value of electromagnetic signals, it is possible to test and evaluate whether the volume content of steel fiber in steel reinforced concrete with steel fiber is qualified. The diameter and the location of steel bar can be checked for compliance based on the peak value and the position of peak value of the curve.

叶芳,赵鹏,施俊航,等.基于电磁感应原理的钢筋钢纤维混凝土无损检测方法研究[J].混凝土与水泥制品,2024(4):77-81. YE Fang, ZHAO Peng, SHI Junhang,et al.Study on non-destructive testing method of steel reinforced concrete with steel fiber based on electromagnetic induction principle[J].China Concrete and Cement Products,2024(4):77-81.

基于超声检测的再生混凝土声学参数研究

郭广1，周理1，2，*，王帮康1

2024年第4期

摘要

引用本文

摘要：制作了5组不同再生粗骨料取代率（0、25%、50%、75%、100%）的试件，测试了其轴心抗压强度、弹性模量及破坏前后的声学参数，分析了再生粗骨料取代率、力学指标与声学参数之间的关系。结果表明：随着再生粗骨料取代率的增加，试件的轴心抗压强度呈先波动上升后下降的趋势，弹性模量呈下降趋势；在试件破坏前，试件的首波声速、首波幅值和主频值的数据离散性较小；在试件破坏后，各项声学参数较破坏前均下降，且数据离散性变大；首波声速和均方根振幅与弹性模量的相关性较好。 Abstract: Five sets of specimens with different replacement rates of recycled coarse aggregates (0, 25%, 50%, 75%, 100%) were made, and their axial compressive strength, elastic modulus, and acoustic parameters before and after failure were tested. The relationships between the replacement rate of recycled coarse aggregates, mechanical indicators, and acoustic parameters were analyzed. The results show that as the replacement rate of recycled coarse aggregate increases, the axial compressive strength of the specimens shows a fluctuating upward trend and then a decreasing trend, while the elastic modulus shows a decreasing trend. Before the failure of the specimen, the data discreteness of the head wave sound velocity, head wave amplitude, and dominant frequency value of the specimen is relatively small. After the failure of the specimen, all acoustic parameters decrease compared to before the failure, and the data discreteness increases. The correlation between the head wave sound velocity and root mean square amplitude have a good correlation with the elastic modulus.

郭广,周理,王帮康.基于超声检测的再生混凝土声学参数研究[J].混凝土与水泥制品,2024(4):82-86. GUO G,ZHOU L,WANG B K.Study on acoustic parameters of recycled concrete based on ultrasonic testing[J].China Concrete and Cement Products,2024(4):82-86.

钢筋混凝土开洞梁力学性能研究现状与进展

张扬1，颜阳2，熊学玉1，3，*，陈率4，陶华4

2024年第4期

摘要

引用本文

摘要：总结了国内外钢筋混凝土开洞梁的受力机理、受力性能、洞口补强加固方式、承载能力计算等研究现状。现有研究结果表明：洞口上、下弦杆可看作是偏心受压和偏心受拉状态；当洞口尺寸较小时，钢筋混凝土开洞梁可看作带有斜压腹杆的桁架模型，当洞口尺寸较大时，洞口部分为无斜压腹杆的平行弦杆以及无洞口部分的带有斜压腹杆的桁架模型；钢筋混凝土开洞梁主要有孔侧破坏和孔间破坏两种破坏模式；钢筋混凝土开洞梁的结构响应主要取决于荷载路径的中断程度；随着洞口高度和宽度的增加，钢筋混凝土开洞梁的承载力会降低，但若设计合理，不会形成薄弱区；普通钢筋、纤维布和纤维板都可用于洞口区域的加固，相应的抗剪承载力计算也较为完善。 Abstract: Based on the literature at home and abroad, the research status of reinforced concrete beams with openings in terms of mechanical mechanism, mechanical performance, reinforcement methods of openings, and calculation of bearing capacity are summarized. The existing research results show that the upper chord and the lower chord in the openings can be regarded as eccentric compression and eccentric tension, respectively. When the size of the openings is small, the reinforced concrete beams with openings can be regarded as a truss model with diagonal web members, and when the size of the openings is large, the reinforced concrete beams with openings can be regarded as parallel chords without diagonal web members at the openings and truss model with diagonal web members at the no-openings. There are two main failure modes of reinforced concrete beams with openings, namely, opening side failure and inter-opening failure. The structural response of reinforced concrete beams with openings mainly depends on the interruption degree of load path. With the increase of the height and width of the openings, the bearing capacity of reinforced concrete beams with openings decreases, and if the design is reasonable, weak areas can not be formed. Ordinary steel bars, fiber cloth, and fiber plate can be used to strengthen the opening area, and the corresponding calculation of shear bearing capacity is also relatively perfect. The research results can provide a reference for the popularization and application of reinforced concrete beams with openings.

张扬,颜阳,熊学玉,等.钢筋混凝土开洞梁力学性能研究现状与进展[J].混凝土与水泥制品,2024(4):63-69,76. ZHANG Y,YAN Y,XIONG X Y,et al.Research status and progress of mechanical properties of reinforced concrete beams with openings[J].China Concrete and Cement Products,2024(4):63-69,76.

预制内外复合保温模壳拼装墙体热工性能研究

王洪镇1，2，张笑笑1，*，杨永恒1，王璟1，褚文斌1，高潇1，李雨泽1

2024年第4期

摘要

引用本文

摘要：为探究预制内外复合保温模壳拼装墙体结构中的卡板连接件对墙体热工性能的影响，通过热工理论计算、试验研究、ANSYS有限元热分析模拟软件3种方法，对比分析了无连接件、不同数量连接件以及双面抹灰不同条件下墙体的传热系数。结果表明：在无连接件条件下，实际墙体热工试验测试值与热工理论计算值的误差较小；连接件数量越多，热桥效应越明显，墙体的热工性能越差；采用有限元模拟软件对墙体进行热工设计结果较精确，可作为设计依据；研究结果可为模壳拼装墙体在超低能耗建筑的应用及能耗分析提供借鉴。 Abstract: In order to explore the influence of the plate connector on the thermal performance of the prefabricated interior and exterior composite insulation mold shell assembled wall， the heat transfer coefficients of the walls under different conditions were obtained by comparing and analyzing walls with non-connecting parts, different number of connecting parts and single and double plastered walls by using the methods of thermal theory calculation, practical test detection and ANSYS finite element thermal analysis simulation software. The results show that under the condition of non-connecting parts, the error between the actual wall thermal test values and the theoretical thermal calculation values is relatively small. The more connectors there are, the more obvious the thermal bridge effect, and the poorer the thermal performance of the wall. The thermal design results of the wall by using finite element simulation software are accurate and can be used as a design basis. The results provide reference for subsequent energy consumption analysis in ultra-low energy consumption buildings.

王洪镇,张笑笑,杨永恒,等.预制内外复合保温模壳拼装墙体热工性能研究[J].混凝土与水泥制品,2024(4):70-76. WANG H Z,ZHANG X X,YANG Y H,et al.Study on thermal performance of assembled wall with prefabricated internal and external composite insulation mold shell[J].China Concrete and Cement Products,2024(4):70-76.

机制砂高延性工程水泥基复合材料（ECC）的性能研究

曹鑫铖，李龙梓，张立力，蒋涛，叶国林，宋秋磊

2024年第4期

摘要

引用本文

摘要：采用双因素方差分析法，研究了水胶比（0.30、0.35、0.40）和砂胶比（0.35、0.45、0.55）对工程水泥基复合材料（ECC）抗压和抗折强度的影响，优选出了最佳水胶比和砂胶比。在此基础上，研究了PVA纤维体积掺量（1.0%、1.5%、2.0%）和机制砂掺量（0、50%、100%）对ECC弯曲韧性的影响，并采用非线性回归法建立了预测模型。结果表明：ECC的最佳水胶比和砂胶比分别为0.30和0.55；掺入适量机制砂能在一定程度上提高ECC的峰值挠度，改善ECC的弯曲韧性；当PVA纤维体积掺量为2.0%、机制砂掺量为50%时，ECC的各项弯曲韧性指标相对最优；建立的机制砂高延性ECC峰值抗弯强度和峰值挠度预测模型的拟合精度较高，具有一定的适用性。 Abstract: The influence of water-binder ratio(0.30, 0.35, 0.40) and sand-binder ratio(0.35, 0.45, 0.55) on the compressive and flexural strength of engineered cementitious composites(ECC) was studied by using the two factor analysis of variance method, and the optimal water-binder ratio and sand-binder ratio were selected. On this basis, the effects of PVA fiber volume contents (1.0%, 1.5%, 2.0%) and manufactured sand contents(0, 50%, 100%) on the bending performance of ECC were studied, and a predictive model was established by using nonlinear regression method. The results show that the optimal water-binder ratio and sand-binder ratio for ECC are 0.30 and 0.55, respectively. Adding an appropriate content of manufactured sand can improve the peak deflection and bending toughness of ECC to a certain extent. When the volume content of PVA fiber is 2.0% and the content of manufactured sand is 50%, the various bending toughness indicators of ECC are relatively optimal. The established prediction models of peak bending strength and peak deflection of manufactured sand high ductility ECC have high fitting accuracy and certain applicability.

曹鑫铖,李龙梓,张立力,等.机制砂高延性工程水泥基复合材料（ECC）的性能研究[J].混凝土与水泥制品,2024(4):48-52. CAO X C,LI L Z,ZHANG L L,Performance study on high ductility engineered cementitious composites (ECC) with manufactured sand48-52.

SAP预湿水量对UHPC性能的影响

李信1，2，陈露一1，2

2024年第4期

摘要

引用本文

摘要：研究了高吸水性树脂（SAP）的预湿水量（0、20、30、40 kg/m3）对超高性能混凝土（UHPC）工作性、力学性能和收缩性能的影响。结果表明：随着SAP预湿水量的增加，UHPC的初始和3 h扩展度均增加，3 d和28 d抗压强度均降低，且3 d抗压强度降低更明显，自收缩值降低，干燥收缩值增大。 Abstract: The effect of pre-wetting water content (0, 20, 30, 40 kg/m3) of super absorbent polymer(SAP) on the workability, mechanical properties, and shrinkage performance of ultra-high performance concrete(UHPC) was studied. The results show that with the increase of SAP pre-wetting water content, the initial and 3 h slump-flow of UHPC increase, the 3 d and 28 d compressive strength decrease, and the 3 d compressive strength decreases more significantly, and the self shrinkage value decreases and the drying shrinkage value increases.

李信,陈露一.SAP预湿水量对UHPC性能的影响[J].混凝土与水泥制品,2024(4):53-55. LI X,CHEN L Y.Pre-wetting water content of SAP on performance of UHPC[J].China Concrete and Cement Products,2024(4):53-55.

水稻秸秆纤维对混凝土抗压性能的影响

张烜，赵瑜，黄真江，张坤，陆智杰

2024年第4期

摘要

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摘要：研究了水稻秸秆纤维的长度（10~30 mm、40~60 mm）和掺量（0、2、4、8 kg/m3）对混凝土抗压强度的影响，分析了试件表面的裂缝情况，并进行了析因分析。结果表明：掺入适量水稻秸秆纤维能有效提高混凝土的1、14、28 d抗压强度，改善单轴压缩作用下混凝土表面裂缝的形态及分布情况，且较长水稻秸秆纤维的提高作用相对更好；水稻秸秆纤维对混凝土1、14、28 d抗压强度的影响程度大小均为：掺量>长度与掺量共同作用>长度；考虑28 d抗压强度时，建议水稻秸秆纤维的长度为40~60 mm、掺量为2 kg/m3。 Abstract: The effects of the length(10~30 mm、40~60 mm) and content(0, 2, 4, 8 kg/m3) of rice straw fiber on the compressive strength of concrete were studied, the surface cracks of the specimens were analyzed, and the factorial analysis was conducted. The results show that adding an appropriate content of rice straw fiber can effectively improve the 1 d, 14 d, and 28 d compressive strength of concrete, improve the morphology and distribution of surface cracks under uniaxial compression, and the improvement effect of longer rice straw fiber is relatively better. The influence degree of rice straw fiber on the 1 d, 14 d, and 28 d compressive strength of concrete is as follows: content > combined effect of length and content > length. When considering the 28 d compressive strength, it is recommended that the length of rice straw fiber be 40~60 mm and the content be 2 kg/m3.

张烜,赵瑜,黄真江,等.水稻秸秆纤维对混凝土抗压性能的影响[J].混凝土与水泥制品,2024(4):56-58,62. ZHANG X,ZHAO Y,HUANG Z J,et al.Effect of rice straw fibers on compressive performance of concrete[J].China Concrete and Cement Products,2024(4):56-58,62.

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