第五期_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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第五期

再生微粉对超高性能混凝土力学性能和微观结构的影响

何智海1,2，张梦圆1，詹培敏3，杨一凡1，兰波1

2021年第5期

摘要

引用本文

摘要：研究了两种类型的再生微粉（混凝土粉和砖粉）取代部分硅灰对超高性能混凝土（Ultra-high Performance Concrete，UHPC）力学性能和微观结构的影响。结果表明：混凝土粉的掺入降低了UHPC的力学性能，而砖粉取代15%硅灰时，UHPC的28 d抗压强度和抗折强度分别达到了130 MPa和24 MPa，略高于基准组；相较于混凝土粉，在UHPC中掺入15%的砖粉能够优化混凝土的内部结构；砖粉良好的微集料填充作用和火山灰效应增强了界面过渡区的黏结性能和水化产物的纳观力学性能，从而改善UHPC的微观结构。 Abstract： The effect of replacing part of silica fume with two kinds of hybrid recycled powder (concrete powder and brick powder) on the mechanical properties and microstructure of ultra-high performance concrete (UHPC) was studied. The results show that the addition of concrete powder reduces the mechanical properties of UHPC, while the 28 d compressive strength and flexural strength of UHPC reach 130 MPa and 24 MPa respectively when 15% silica fume is replaced by brick powder, which are slightly higher than those of the reference group. Compared with concrete powder, mixing 15% brick powder in UHPC can optimize the internal structure of concrete. The good micro-aggregate filling effect and pozzolanic properties of brick powder enhance the cohesiveness of the interface transition zone and the nanomechanical properties of the hydration products, thus improving the microstructure of UHPC.

何智海,张梦圆,詹培敏,等.再生微粉对超高性能混凝土力学性能和微观结构的影响[J].混凝土与水泥制品,2021(5):85-90. HE Z H,ZHANG M Y,ZHAN P M,et al.Effect of Hybrid Recycled Powder on Mechanical Properties and Microstructure of Ultra-high Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):85-90.

利用电解锰渣制备活性粉末混凝土的研究

季军荣1，武双磊2，陈宇2，周洲1，陈胡星2

2021年第5期

摘要

引用本文

摘要：研究了电解锰渣取代石英粉或矿渣微粉对活性粉末混凝土（RPC）强度、收缩率和重金属浸出毒性的影响。结果表明：电解锰渣部分取代石英粉或矿渣微粉，RPC的抗压强度总体上有所提高，而抗折强度稍有下降；干缩率与湿胀率均降低；重金属浸出浓度均低于Ⅴ类地表水限值。 Abstract: The effects of electrolytic manganese residue instead of quartz powder or slag powder on the strength, shrinkage and heavy metal leaching toxicity of reactive powder concrete (RPC) were studied. The results show that using electrolytic manganese residue to partially replace quartz powder or slag powder, the compressive strength of RPC is generally improved, while the flexural strength is slightly reduced, the dry shrinkage and wet swelling rate of RPC are both reduced, and the leaching concentration of heavy metals is below Class V surface water limit.

季军荣,武双磊,陈宇,等.利用电解锰渣制备活性粉末混凝土的研究[J].混凝土与水泥制品,2021(5):91-94,99. JI J R,WU S L,CHEN Y,et al.Study on the Preparation of Reactive Powder Concrete with Electrolytic Manganese Residue[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):91-94,99.

不同材料增强处理再生骨料对混凝土抗压强度的影响

孙柯华1，沈阳2，王伟3，罗锋3，杨雅诗4，韦建斌5，章乐远3，冯兴国3，胡坤3，徐逸文3

2021年第5期

摘要

引用本文

摘要：研究了水泥浆、偏高岭土地聚物、掺粉煤灰偏高岭土地聚物、水泥浆-偏高岭土地聚物增强处理再生骨料对混凝土抗压强度的影响。结果表明：四种增强材料处理的再生骨料对混凝土抗压强度的影响顺序大小为水泥浆-偏高岭土地聚物＞偏高岭土地聚物＞水泥浆＞掺粉煤灰偏高岭土地聚物。 Abstract: The effects of cement slurry, metakaolin geopolymer, metakaolin geopolymer with fly ash and cement slurry-metakaolin geopolymer on compressive strength of concrete were studied. The results show that the influence order of recycled aggregate reinforced by four materials on compressive strength of concrete is cement slurry-metakaolin geopolymer > metakaolin geopolymer > cement slurry > metakaolin geopolymer with fly ash.

孙柯华,沈阳,王伟,等.不同材料增强处理再生骨料对混凝土抗压强度的影响[J].混凝土与水泥制品,2021(5):95-99. SUN K H,SHEN Y,WANG W,et al.Effects of Recycled Aggregate Reinforced by Different Materials on Compressive Strength of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):95-99.

原状粉煤灰-铁尾矿泡沫混凝土的性能研究

孙婧1,2,3，王宏1，陈静4，安艳玲1，兰建伟1，刘宏波1,3

2021年第5期

摘要

引用本文

摘要：采用Design-Expert软件研究了原状粉煤灰及铁尾矿砂对泡沫混凝土干密度、吸水率及抗压强度的影响，并观察了泡沫混凝土断面的细观结构。结果表明：原状粉煤灰掺量的增加会使泡沫混凝土的干密度和吸水率降低，当原状粉煤灰掺量占胶凝材料的40%时，泡沫混凝土的抗压强度最高；固定粉煤灰掺量为40%，铁尾矿砂掺量在0～50%范围内增加会使泡沫混凝土的干密度和抗压强度增加，吸水率降低；当原状粉煤灰掺量＜40%时，原状粉煤灰掺量越多，泡沫混凝土内部的气泡越稳定；铁尾矿砂掺量的增加可使泡沫混凝土的孔径减小，密实度增加。 Abstract: The influence of original fly ash and iron tailings on dry density, water absorption and compressive strength of foam concrete was studied by Design-Expert software, and the microstructure of foam concrete was observed. The results show that the dry density and water absorption rate of foam concrete decrease with the increase of raw fly ash content, and when the original fly ash content is 40%, the compressive strength of foam concrete is the highest. When the fixed fly ash content is 40%, the increase of iron tailings content in the range of 0~50% can increase the dry density and compressive strength of foam concrete, but reduce the water absorption. When the original fly ash content is less than 40%, the more the raw fly ash content, the more stable the bubbles inside the foam concrete. The increase of the iron tailings content can reduce the pore size of foam concrete and increase the density.

孙婧,王宏,陈静,等.原状粉煤灰-铁尾矿泡沫混凝土的性能研究[J].混凝土与水泥制品,2021(5):100-104. SUN J,WANG H,CHEN J,et al.Study on Properties of Original Fly Ash-iron Tailings Foam Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):100-104.

SFRC/SCC钢筋复合梁受弯性能试验研究

苏骏1,2，钱维民1，柯骄1

2021年第5期

摘要

引用本文

摘要：设计了一批受拉区为SFRC、受压区为SCC的钢筋复合梁，分析了纵筋配筋率、SFRC替换层钢纤维体积掺量以及替换层高度对复合梁在四点弯曲荷载作用下的承载力、挠度以及裂缝形态的影响，并与普通混凝土梁进行了对比。通过理论分析计算得出了SFRC/SCC复合梁的承载力表达式，并将理论计算结果与试验数据进行了对比分析，以验证表达式的合理性。结果表明：配筋率是提升复合梁承载力的首要因素，1.32%配筋率相对于0.79%配筋率的极限承载力最大可提升24.1%；钢纤维替换层对复合梁的承载力提升并不明显，但对于复合梁的挠度与裂缝宽度控制有明显作用，将替换层高度由50 mm提升至150 mm时，复合梁的挠度和主裂缝宽度最大分别降低了9.2%和77.81%。 Abstract: A batch of reinforced composite beams with SFRC tension zone and SCC compression zone were designed, and the effects longitudinal reinforcement ratio, SFRC replacement layer steel fiber volume content and replacement layer height on the bearing capacity, deflection and crack shape of composite beams under the four-point bending load were analyzed, and compared with ordinary concrete beams. Through theoretical analysis and calculation, the expression of the bearing capacity of SFRC/SCC composite beams was obtained, and the theoretical calculation results were compared with the experimental datas to verify the rationality of the expression. The results show that the reinforcement ratio is the primary factor to improve the bearing capacity of composite beams. Compared with the reinforcement ratio of 0.79%, the ultimate bearing capacity can be increased by 24.1% at the maximum reinforcement ratio of 1.32%. The steel fiber replacement layer does not significantly improve the bearing capacity of composite beams, but it has an obvious effect on the deflection and crack width control of composite beams. When the replacement layer height is increased from 50 mm to 150 mm, the deflection and main crack width of composite beams are reduced by 9.2% and 77.81% respectively.

苏骏,钱维民,柯骄.SFRC/SCC钢筋复合梁受弯性能试验研究[J].混凝土与水泥制品,2021(5):60 -64,70. SU J,QIAN W M,KE J.Experimental Study on the Flexural Performance of SFRC/SCC Reinforced Composite Beams[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):60 -64,70.

无腹筋混凝土受剪梁声发射灰色理论预测模型

李向阳，秦拥军，吕旭滨

2021年第5期

摘要

引用本文

摘要：建立了无腹筋混凝土梁受剪破坏中声发射现象的声发射灰色预测模型，并采用修正方法对模型进行了修正。结果表明：采用两次修正、调整系数a和一次修正三种方法引入修正系数对GM（1，1）模型的预测精度有较大提高，对声发射（AE）累计事件数的数值预测效果有较好的拟合性，AE累计事件数变化趋势的预测结果与试验结果之间的差异较小，可以实现对无腹筋混凝土梁受剪破坏的判别与预测。 Abstract: The grey theory prediction model of acoustic emission in shear failure of concrete beams without abdominal reinforcement was established, and the model was modified by the modified method. The results show that the prediction accuracy of GM (1,1) model is greatly improved by using the three methods of two corrections, adjustment coefficient a and one correction to introduce correction coefficients, and the acoustic emission(AE) accumulative total number of the numerical prediction results have good fitting, and the difference between the predicted results and experimental results of AE accumulative events change trend is low, which can realize the discrimination and prediction of the shear failure of concrete beams without abdominal reinforcement.

李向阳,秦拥军,吕旭滨.无腹筋混凝土受剪梁声发射灰色理论预测模型[J].混凝土与水泥制品,2021(5):65-70. LI X Y,QIN Y J,LYU X B.Grey Theory Prediction Model of Acoustic Emission of Concrete Beam Without Abdominal Reinforcement[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):65-70.

预制高强硅酸盐墙板力学性能试验研究

谢国庆，任虎，罗双，付汝宾，孔德文

2021年第5期

摘要

引用本文

摘要：研究了高强硅酸盐墙板的抗压性能及破坏形态，提出了标准试块受压应力-应变本构方程，通过ABAQUS有限元软件进行了数值模拟，并与试验结果进行了对比。结果表明：标准试块受压应力-应变全过程曲线的形状和普通混凝土相似，峰值应力前曲线接近直线，达到峰值应力后，应力迅速跌落；可采用二段式曲线拟合高强硅酸盐墙板标准试块的单轴受压应力-应变关系，得出其本构模型；试件的破坏形态为脆性破坏，延性较差，抗压试件破坏时两板面出现竖向裂缝，两孔间肋出现竖向裂缝和斜裂缝；试件承载力较高，满足现有规范对建筑用隔墙条板的强度要求。 Abstract: The compressive properties and failure mode of high-strength silicate wallboards were studied, and the stress-strain constitutive equation of the standard test block was put forward. The numerical simulation was carried out by ABAQUS finite element software, and the results were compared with the experimental results. The result shows that the shape of the compressive stress-strain entire process curve of the standard test block is similar to that of ordinary concrete, and it increases approximately linearly before reaching the peak stress, and drops rapidly after reaching the peak stress. The two-section curve can be used to fit the uniaxial compressive stress-strain relationship of the standard test block of the wallboard, and its constitutive model is given. The failure mode of the specimen is brittle failure with poor ductility, and when the compressive specimen is damaged, vertical cracks appear on the two plates, and vertical cracks and oblique cracks appear on the ribs between the two hole ribs. The bearing capacity of the specimen is high, which can meet the strength requirements of the existing codes for artition board used in buildings.

谢国庆,任虎,罗双,等.预制高强硅酸盐墙板力学性能试验研究[J].混凝土与水泥制品,2021(5):71-75. XIE G Q,REN H,LUO S,et al.Experimental Study on Mechanical Properties of Prefabricated High-strength Silicate Wallboards[J].CHINA CONCRETE AND CEMENT

圆钢管微膨胀陶粒混凝土短柱轴压极限承载力计算公式

李秀1，朱红兵2，韩帅2

2021年第5期

摘要

引用本文

李秀,朱红兵,韩帅.圆钢管微膨胀陶粒混凝土短柱轴压极限承载力计算公式[J].混凝土与水泥制品,2021(5):76-79. LI X,ZHU H B,HAN S.Ultimate Bearing Capacity Calculation Formula of Micro-expansive Ceramsite Concrete Steel Tubular Short Column Under Axial Compression[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):76-79.

纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究

张妍青1，吕高勇2

2021年第5期

摘要

引用本文

摘要：在高性能纤维增强混凝土（HPFRC）耗能墙-钢筋混凝土（RC）框架结构抗震性能试验研究的基础上，考虑了RC框架混凝土强度等级、框架柱配筋率、框架柱截面尺寸三个因素，进行了有限元模拟分析。结果表明：建立的HPFRC耗能墙-RC框架结构有限元模型较为准确，有限元计算结果与试验结果吻合较好；随着RC框架混凝土强度等级的提升，试件各个荷载特征点的水平承载力均有所提高，但变形能力变化不大；随着框架柱配筋率和框架柱截面尺寸的增大，试件各个荷载特征点的水平承载力均明显提高，极限位移也有所增加；为了保证此类结构的抗震性能，针对RC框架混凝土强度等级、框架柱配筋率和框架柱截面尺寸，提出了可供设计参考的相关建议值。 Abstract: Based on the experimental study on seismic performance of high performance fiber reinforced concrete (HPFRC) energy dissipation wall-reinforced concrete (RC) frame structure, three factors of RC frame concrete strength grade, frame column reinforcement ratio, and frame column section size were considered to carried out finite element simulation analysis. The results show that the established finite element model of HPFRC energy dissipation wall-RC frame structure is accurate, and the finite element calculation results are in good agreement with the experimental results. With the increase of the RC frame concrete strength grade, the horizontal bearing capacity of each load characteristic point of the specimen is improved, but the deformation capacity changes little. With the increase of the frame column reinforcement ratio and the frame column section size, the horizontal bearing capacity of each load characteristic point of the specimen is significantly increased, and the ultimate displacement is also increased. In order to ensure the seismic performance of this kind of structure, the relevant recommended values for design reference are put forward for the RC frame concrete strength grade, frame column reinforcement ratio and frame column section size.

张妍青,吕高勇.纤维增强混凝土耗能墙-钢筋混凝土框架结构抗震性能数值研究[J].混凝土与水泥制品,2021(5):80-84. ZHANG Y Q,LYU G Y.Numerical Study on Seismic Performance of HPFRC Energy Dissipation Wall-RC Frame Structure[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):80-84.

混杂纤维轻骨料混凝土力学性能试验研究

张萌1，骆文进2

2021年第5期

摘要

引用本文

摘要：针对当前高层建筑物中普通混凝土自重大，而轻骨料混凝土强度较普通混凝土低的现状，以不同玄武岩纤维体积率（Vb）、聚丙烯纤维体积率（Vp）和陶粒代取代率（Rc）为影响因素，利用正交试验法设计了9组混杂纤维轻骨料混凝土（HF-LWC），进行了抗压强度、抗折强度和劈裂抗拉强度试验，并基于试验结果建立了强度预测模型。结果表明：三种因素对抗折强度的提升幅度大于对抗压强度和劈裂抗拉强度的提升幅度，最大增幅为45.23%；随着Vb的增加，HF-LWC的强度逐渐增大，且Vb对HF-LWC强度的影响最显著；当Vb为0.2%、Vp为0.1%、Rc为10%时，HF-LWC强度最佳；拟合得出的HF-LWC抗压强度、抗折强度和劈裂抗拉强度模型的精度较高。 Abstract: In view of the current situation that the self-weight of ordinary concrete in high-rise buildings, and the strength of lightweight aggregate concrete is lower than that of ordinary concrete. Taking different basalt fiber volume ratio (Vb), polypropylene fiber volume ratio (Vp) and ceramsite replacement rate(Rc) as influencing factors, 9 groups of hybrid fiber lightweight aggregate concrete (HF-LWC) were designed by orthogonal test method, and the compressive strength, flexural strength and split tensile strength tests were carried out, and the strength predictive models were established based on the test results. The results show that the increase in flexural strength of the three factors is greater than the increase in compressive strength and split tensile strength, with the maximum increase of 45.23%. With the increase of the basalt fiber volume ratio, the strength of HF-LWC gradually increases, and the basalt fiber volume ratio has the most significant influence on the strength of HF-LWC. When the basalt fiber volume ratio is 0.2%, polypropylene fiber volume ratio is 0.1% and ceramsite replacement rate is 10%, the strength of HF-LWC is the best. The accuracy of HF-LWC compressive strength, flexural strength and splitting tensile strength models are high.

张萌,骆文进.混杂纤维轻骨料混凝土力学性能试验研究[J].混凝土与水泥制品,2021(5):48-52. ZHANG M,LUO W J.Experimental Study on Mechanical Properties of Hybrid Fiber Lightweight Aggregate Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):48-52.

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