第十二期_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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第十二期

磷石膏基复合材料的制备及性能研究

柏洁1，周华2，谢嘉骥3，文伟1，丁俊豪1，冯选辉1

2021年第12期

摘要

引用本文

摘要：以磷石膏、粉煤灰、矿渣微粉、生石灰为主要原料制备了磷石膏基复合材料，研究了磷石膏基复合材料性能的影响因素，并通过多变量数值分析得到了最优配合比。结果表明：当磷石膏、粉煤灰、矿渣微粉、生石灰的质量比为1∶0.4∶0.06∶0.03时，制备的磷石膏基复合材料的抗压、抗折强度均较高；掺入6‰防水剂对磷石膏基复合材料的抗压强度提升较大，复掺3‰减水剂+3‰防水剂对抗折强度提升较大；当水胶比为0.38~0.40时，磷石膏基复合材料的强度较高；21 ℃蒸汽养护14 d可使磷石膏基复合材料的强度达到最佳，但蒸汽养护会导致磷石膏基复合材料的吸水率增大、软化系数降低；通过数值分析建立的多变量磷石膏基复合材料的强度计算公式，可以得出单一变量下磷石膏基复合材料的强度值和多变量下磷石膏基复合材料的强度值与对应原材料掺量之间的关系。 Abstract: The phosphogypsum-based composites were prepared with phosphogypsum, fly ash, slag powder and quicklime as main raw materials. The factors affecting the performance of phosphogypsum-based composites were studied, and the optimal mix proportion was obtained through multivariate numerical analysis. The results show that when the mass ratio of phosphogypsum, fly ash, slag powder, and quicklime is 1∶0.4∶0.06∶0.03, the compressive and flexural strengths of the prepared phosphogypsum-based composite materials are higher. The compressive strength of phosphogypsum-based composites is greatly improved by adding 6‰ water-repellent agent, and the flexural strength of phosphogypsum-based composites is greatly improved by adding 3‰ water-reducing agent + 3‰ water-repellent agent. When the water-binder ratio is 0.38~0.40, the strength of phosphogypsum-based composites is higher. Steam curing at 21 ℃ for 14 days can optimize the strength of phosphogypsum-based composites, but steam curing will increase the water absorption and decrease the softening coefficient of phosphogypsum-based composites. Through the strength calculation formula of multivariable phosphogypsum-based composites established by numerical analysis, the relationship between the strength value of phosphogypsum-based composites under single variable and the strength value of phosphogypsum-based composites under multivariable and the corresponding raw material content can be obtained.

柏洁,周华,谢嘉骥,等.磷石膏基复合材料的制备及性能研究[J].混凝土与水泥制品,2021(12):94-99. BAI J,ZHOU H,XIE J J,et al.Study on the Preparation and Performance of Phosphogypsum-based Composites[J].China Concrete and Cement Products,2021(12):94-99.

再生粗骨料品质和掺量对再生混凝土力学性能的影响

陈旭勇，刘榴，程书凯，屠艳平，肖雪皓

2021年第12期

摘要

引用本文

摘要：采用两种再生粗骨料（RAⅠ、RAⅡ）分别替代30%、50%、70%、100%的天然粗骨料，以及将两种再生粗骨料以不同质量比（mRAⅠ∶mRAⅡ=1∶3、1∶1、3∶1）混合后替代30%、50%、70%、100%的天然粗骨料制备了再生混凝土，研究了不同再生粗骨料的品质和掺量对再生混凝土抗压强度、劈裂抗拉强度和轴心抗压强度的影响。结果表明：再生混凝土的抗压强度、劈裂抗拉强度和轴心抗压强度均随着再生粗骨料掺量的增加而降低；当再生粗骨料掺量一定时，再生混凝土的力学强度随着mRAⅠ∶mRAⅡ的增大而增大；参考GB 50010—2010《混凝土结构设计规范》建立的再生混凝土轴心抗压强度与立方体抗压强度关系式的拟合效果较好。 Abstract: Recycled concrete was prepared by using two kinds of recycled coarse aggregate(RAⅠ, RAⅡ) to replace 0, 30%, 50%, 70% and 100% natural coarse aggregate respectively, and using mixed recycled coarse aggregate (mRAⅠ∶mRAⅡ=1∶3, 1∶1, 3∶1) to replace 0, 30%, 50%, 70% and 100% natural coarse aggregate. The effects of different quality and content of recycled coarse aggregate on the compressive strength, splitting tensile strength and axial compressive strength of recycled concrete were studied. The results show that the compressive strength, splitting tensile strength and axial compressive strength of recycled concrete decrease with the increase of recycled coarse aggregate content. When the content of recycled coarse aggregate is constant, the mechanical properties of recycled concrete increase with the increase of mRAⅠ∶mRAⅡ. The relationship between the axial compressive strength and the cubic compressive strength of recycled concrete established by referring to GB 50010—2010 Code for Design of Concrete Structures has a good fitting effect.

陈旭勇,刘榴,程书凯,等.再生粗骨料品质和掺量对再生混凝土力学性能的影响[J].混凝土与水泥制品,2021(12):89-93. CHEN X Y,LIU L,CHENG S K,et al.Effect of Recycled Coarse Aggregate Quality and Content on Mechanical Properties of Recycled Concrete[J].China Concrete and Cement Products,2021(12):89-93.

基于正交试验的机制砂自密实轻骨料混凝土配合比设计

张淑云，周杰，张政，秦卿

2021年第12期

摘要

引用本文

摘要：采用固定砂石体积法和改进的全计算法，设计了C40机制砂自密实轻骨料混凝土的配合比，并通过正交试验分析了机制砂自密实轻骨料混凝土的抗压强度和工作性。结果表明：当水胶比为0.37、体积砂率为51%、Ⅰ级粉煤灰替代率为20%、硅灰替代率为4%、聚羧酸高性能减水剂掺量为1%时，能够满足C40机制砂自密实轻骨料混凝土的相关性能要求。 Abstract: Using the fixed gravel volume method and the improved total calculation algorithm, the mix proportion of C40 machine-made sand self-compacting lightweight aggregate concrete was designed, and the compressive strength and workability of machine-made sand self-compacting lightweight aggregate concrete were analyzed through orthogonal test. The results show that when the water-binder ratio is 0.37, the volume sand ratio is 51%, the substitution rate of grade Ⅰ fly ash is 20%, the substitution rate of silica fume is 4%, and the content of polycarboxylic acid high-performance water-reducing agent is 1%, C40 machine-made sand self-compacting lightweight aggregate concrete can meet the relevant performance requirements.

张淑云,周杰,张政,等.基于正交试验的机制砂自密实轻骨料混凝土配合比设计[J].混凝土与水泥制品,2021(12):84-88,93. ZHANG S Y,ZHOU J,ZHANG Z,et al.Mix Proportion Design of Machine-made Sand Self-compacting Lightweight Aggregate Concrete Based on Orthogonal Test[J].China Concrete and Cement Products,2021(12):84-88,93.

煤矸石活性激发及其胶砂力学性能试验研究

丁莎1,2，陈霁溪3，关虓2,3

2021年第12期

摘要

引用本文

摘要：以煤矸石为原料，利用机械球磨法粉碎煤矸石，并将其与不同的化学激发剂混合，制得了活性不一的煤矸石粉。通过正交试验，研究了煤矸石粉掺量、化学激发剂种类和掺量对煤矸石胶砂抗压强度的影响，利用X射线衍射（XRD）和扫描电镜（SEM）分析了煤矸石粉的矿物组成和微观形貌。结果表明：机械球磨破坏了煤矸石的层状结构，提高了其表面活性；以10%掺量的煤矸石粉等质量替代水泥，并掺入2%的Ca(OH)2激发剂，可加快煤矸石粉的二次水化，对应胶砂试件的抗压强度达到最大。 Abstract: Coal gangue powder with different activity was prepared by mechanical ball milling and mixing with different chemical activators. Through orthogonal test, the influence of coal gangue powder content, chemical activator type and content on the compressive strength of coal gangue mortar was studied, and the mineral composition and micro morphology of coal gangue powder were analyzed by X-ray diffraction(XRD) and scanning electron microscope(SEM). The results show that mechanical ball milling destroys the layered structure of coal gangue and improves its surface activity. By replacing cement with 10% coal gangue powder and adding 2% Ca(OH)2 activator, the secondary hydration of coal gangue powder can be accelerated, and the compressive strength of corresponding mortar specimen can reach the maximum.

丁莎,陈霁溪,关虓.煤矸石活性激发及其胶砂力学性能试验研究[J].混凝土与水泥制品,2021(12):79-83. DING S,CHEN J X,GUAN X.Experimental Study on Active Excitation of Coal Gangue and Mechanical Properties of Mortar[J].China Concrete and Cement Products,2021(12):79-83.

装配式整体轻质内隔墙在建筑工业化中的研究与应用

王铁柱，杨飞华，赵炜璇，高志杰

2012年第12期

摘要

引用本文

摘要：传统内隔墙通过块材砌筑，以加气条板、空心板、轻钢龙骨为主，多采用人工安装，施工效率较低，且后期存在裂缝等质量问题。结合具体工程案例，以建筑工业化为方向，采用新型立模、轻质混凝土技术，进行了整体轻质内隔墙的研制和应用，实现了产品尺寸定制化和流水线生产，同时，在工厂内预埋管线，实现了现场机械化安装、与梁板柱同步施工，不仅提高了施工效率，而且有效解决了传统内隔墙存在的裂缝等质量问题，且研制的装配式整体轻质内隔墙的隔声性能优于传统内隔墙。 Abstract: The traditional internal partition wall is built by block materials, mainly with aerated slats, hollow slabs, and light steel keels, and manual installation is the main method. The construction efficiency is low, and there are quality problems such as cracks in the later stage. Combined with specific engineering cases, taking the construction industrialization as the direction, adopting new vertical form and lightweight concrete technology, the overall lightweight internal partition wall is developed and applied, and the product size customization and assembly line production are realized. At the same time, the pipelines are embedded in the factory to realize on-site mechanized installation and synchronous construction with beams, plates and columns, which not only greatly improves the construction efficiency, but also fundamentally solves the quality problems such as cracks existing in the traditional internal partition wall, and the sound insulation performance of the prefabricated integral lightweight internal partition wall is better than that of the traditional internal partition wall.

王铁柱,杨飞华,赵炜璇,等.装配式整体轻质内隔墙在建筑工业化中的研究与应用[J].混凝土与水泥制品,2021(12):75-78,83. WANG T Z,YANG F H,ZHAO W X,et al.Research and Application of Prefabricated Integral Lightweight Internal Partition Wall in Building Industrialization[J].China Concrete and Cement Products,2021(12):75-78,83.

压-扭作用下中空夹层钢管混凝土的破坏机理分析

廖栩，李吉人，王庆利

2021年第12期

摘要

引用本文

摘要：为了分析中空夹层钢管混凝土在压-扭复合受力下的破坏机理，对24根中空夹层钢管混凝土进行了压-扭静力试验，分析了受力全过程中中截面应变的开展规律及轴力对扭转刚度的影响，并通过扭转变形各阶段中截面横向应变与剪应变的开展，分析了轴力对外钢管约束效应的影响。结果表明：轴压比较大时，扭矩-转角（T-θ）曲线在弹性范围内出现明显的拐点，轴力提高了初始抗扭刚度；圆中空夹层钢管混凝土中截面不同位置处的扭矩-应变（T-ε）曲线重合度较高，相较于方形截面，其对内部结构的约束更均匀；扭矩加载初期，方形截面外钢管角部与中部的环向应变及剪应变相近，加载后期，中部的剪应变大于角部，角部的环向应变大于中部，表明角部出现应力集中，对内部结构的约束效应更明显，同时受力全过程中角部的相互作用力均大于中部。 Abstract: In order to analyze the failure mechanism of the concrete filled double skin steel tube(CFDST) under compression and torsion, the compression-torsion static test was carried out on 24 pieces of concrete filled double skin steel tubes. The strain development of the middle section during the whole process and the effect of the axial force on the torsional stiffness were analyzed. Through the development of hoop strain and shear strain of middle section in each stage of torsional deformation, the influence of axial force on restraint effect of the outer steel tube was analyzed. The results show that when the axial compression ratio is relatively large, the T-θ curve has an obvious inflection point in the elastic stage, and the axial force increases the initial torsional stiffness. The circular CFDST has a higher degree of coincidence of the T-ε curves at different positions of the middle section, and compared with the square outer tube, it has a more uniform restraint effect on the internal structure. At the beginning of torque loading, the hoop strain and shear strain at the corner of the outer steel tube with square cross-section are similar to the middle. At the later stage of torque loading, the shear strain in the middle is greater than that in the corner, but the hoop strain in the corner is greater than that in the middle, which shows that there is stress concentration in the corner, and the restraint effect on the internal structure is obvious. At the same time, the interaction force of the corner is greater than that of the middle during the whole process.

廖栩,李吉人,王庆利.压-扭作用下中空夹层钢管混凝土的破坏机理分析[J].混凝土与水泥制品,2021(12):67-74. LIAO X,LI J R,WANG Q L.Analysis of the Failure Mechanism of Concrete Filled Double Skin Steel Tube Under Compression-torsion[J].China Concrete and Cement Products,2021(12):67-74.

新型PKG叠合板抗弯性能试验研究及有限元分析

金鸿鑫，陆琨，陶忠，房强，何颖成

2021年第12期

摘要

引用本文

摘要：对矩形肋叠合板构件和T形肋叠合板构件进行了均布加载试验，研究了各构件在受力过程中刚度、跨中挠度和裂缝的变化规律，对比分析了各部件的荷载-应变曲线，并得到了构件的开裂荷载和极限承载力。结果表明：叠合板件的力学性能受底板肋部形式的影响较大；相同跨度下，T形肋叠合板件的受力性能优于矩形肋叠合板件；两种肋形式的叠合板件均为受弯破坏，延性良好。T形肋预制底板的有限元分析结果表明，增加T形肋的腹板高度可明显提高构件的抗弯承载力；构件肋孔间的混凝土出现水平方向的贯通裂缝，表明肋孔间混凝土的破坏形式主要为剪切型破坏。 Abstract: Uniform loading tests were carried out on rectangular rib and T-shaped rib composite plates respectively, and the variation laws of stiffness, mid span deflection and cracks of each component during the loading process were studied, and the load-strain curves of each component were compared and analyzed, and the cracking load and ultimate bearing capacity of the component were obtained. The results show that the mechanical properties of the composite plates are greatly affected by the rib form of the bottom plate. Under the same span, the mechanical performance of T-shaped rib is better than that of rectangular rib. The composite plates with two kinds of ribs are flexural failure and have good ductility. The finite element analysis results of T-shaped rib precast floor show that increasing the web height of T-shaped rib can significantly improve the flexural capacity of the component. Horizontal through cracks appear in the concrete between the rib holes, which indicates that the failure mode of the concrete between the rib holes is mainly shear failure.

金鸿鑫,陆琨,陶忠,等.新型PKG叠合板抗弯性能试验研究及有限元分析[J].混凝土与水泥制品,2021(12):59-66,74. JIN H X,LU K,TAO Z,et al.Experimental Study and Finite Element Analysis on Bending Properties of New PKG Composite Plates[J].China Concrete and Cement Products,2021(12):59-66,74.

矿物掺合料和纤维复掺对混凝土力学性能的影响研究

惠存，王森林，李克，陶宏利，邱轩，边亚东

2021年第12期

摘要

引用本文

摘要：通过正交试验研究了粉煤灰、硅灰和玄武岩纤维对混凝土力学性能的影响，结合SPSS软件对试验数据进行了统计分析，运用极差分析方法得到了各因素对混凝土力学性能影响的主次顺序。结果表明：随着粉煤灰掺量的增加，混凝土各龄期的力学性能呈下降趋势；随着硅灰掺量的增加，混凝土各龄期的力学性能呈上升趋势；随着玄武岩纤维掺量的增加，混凝土的抗压强度基本不变，劈裂抗拉强度得到一定提升；当粉煤灰掺量为10%、硅灰掺量为6%、玄武岩纤维掺量为0.45%时，混凝土各龄期的抗压强度和劈裂抗拉强度均最高。 Abstract: The effects of fly ash, silica fume and basalt fiber on the mechanical properties of concrete were studied by orthogonal test, and the test datas were statistically analyzed by SPSS software, and the primary and secondary order of the influence of various factors on the mechanical properties of concrete was obtained by using the range analysis method. The results show that the mechanical properties of concrete at each age decrease with the increase of fly ash content. With the increase of silica fume content, the mechanical properties of concrete at each age show an upward trend. With the increase of basalt fiber content, the compressive strength of concrete is basically unchanged, and the splitting tensile strength is improved to a certain extent. When the fly ash content is 10%, silica fume content is 6% and basalt fiber content is 0.45%, the compressive strength and splitting tensile strength of concrete at each age are the highest.

惠存,王森林,李克,等.矿物掺合料和纤维复掺对混凝土力学性能的影响研究[J].混凝土与水泥制品,2021(12):55-58. HUI C,WANG S L,LI K,et al.Influence of Mineral Admixture and Fiber on the Mechanical Properties of Concrete[J].China Concrete and Cement Products,2021(12):55-58

不同因素对超高性能混凝土工作性及力学性能的影响

王冠1，李炜1，葛文杰1,2，陈玉彬2,3，孙浩1，陈博洋1，陈亦文1，王碧涛1

2021年第12期

摘要

引用本文

摘要：研究了水胶比和矿物掺合料掺量对超高性能混凝土（UHPC）工作性的影响，分析了砂种类对UHPC力学性能的影响。结果表明：增大水胶比、矿渣粉掺量、粉煤灰掺量均可改善UHPC的工作性，而增大硅灰掺量会降低UHPC的工作性；掺入1%的钢纤维可显著提高UHPC的力学性能；海砂、江砂取代石英砂会使UHPC的抗压强度和抗折强度均有不同程度的降低，机制砂取代石英砂会使UHPC的抗压强度增加、抗折强度降低。 Abstract: The influence of water binder ratio and mineral admixtures content on the working performance of ultra-high performance concrete(UHPC) was studied, and the influence of sand type on the mechanical properties of UHPC was analyzed. The results show that increasing the water binder ratio, slag powder content and fly ash content can improve the working performance of UHPC, but increasing silica fume content can reduce the working performance of UHPC. Adding 1% steel fiber can significantly improve the mechanical properties of UHPC. Replacing quartz sand with sea sand and river sand can reduce the compressive strength and flexural strength of UHPC to varying degrees. Replacing quartz sand with machine-made sand can increase the compressive strength and reduce the flexural strength of UHPC.

王冠,李炜,葛文杰,等.不同因素对超高性能混凝土工作性及力学性能的影响[J].混凝土与水泥制品,2021(12):50-54. WANG G,LI W,GE W J,et al.Influence of Different Factors on the Workability and Mechanical Properties of Ultra-high Performance Concrete[J].China Concrete and Cement Products,2021(12):50-54.

玄武岩纤维对3D打印再生水泥基材料性能的影响研究

余盈，李犇，许亮军，邓宇轩，马瑶娜，谢咏菲

2021年第12期

摘要

引用本文

摘要：研究了不同掺量的玄武岩纤维对3D打印再生水泥基材料工作性与力学性能的影响。结果表明：当玄武岩纤维掺量为0.3%~0.5%时，可满足3D打印所需的流动性、可挤出性、可建造性、凝结时间等要求，且所制备的3D打印再生水泥基材料的抗压与抗折性能均较好。 Abstract: The effects of different contents of basalt fiber on the workability and mechanical properties of 3D printed recycled cement-based materials were studied. The results show that when the content of basalt fiber is 0.3%~0.5%, it can meet the requirements of fluidity, extrudability, constructability and setting time for 3D printing, and the compressive and flexural properties of the prepared 3D printed recycled cement-based materials are good.

余盈,李犇,许亮军,等.玄武岩纤维对3D打印再生水泥基材料性能的影响研究[J].混凝土与水泥制品,2021(12):45-49. YU Y,LI B,XU L J,et al.DENG Yu-xuan,Research on the Influence of Basalt Fiber on the Properties of 3D Printed Recycled Cement-based Materials[J].China Concrete and Cement Products,2021(12):45-49.

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