第二期_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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第二期

高速机械粉磨对油基钻屑灰渣活性的影响

张显河1，文华1，*，郑召1，包志涛1，余伟豪2，雷旭1，范伟1

2024年第2期

摘要

引用本文

摘要：对油基钻屑灰渣进行了高速机械粉磨处理，研究了粉磨时间（0~7 min）对灰渣粒径分布和比表面积的影响，分析了掺灰渣胶砂试件的力学性能，并进行了XRD、SEM、FTIR微观分析。结果表明：与未粉磨处理的灰渣相比，粉磨3 min灰渣的粒径分布范围缩小至1.220~40.100 μm，D50降低了60.9%，比表面积增大了27.6%；与其他粉磨时间的灰渣相比，用粉磨3 min的灰渣等质量取代30%水泥所制备的胶砂试件的28 d抗压强度最高，28 d抗折强度也较高；适宜的粉磨时间能够促进灰渣中的活性SiO2、Al2O3等与水泥水化产物Ca(OH)2发生二次水化反应，生成C-S-H凝胶和AFt，提高胶砂结构的密实度。 Abstract: High-speed mechanical grinding treatment was carried out on oil-based drilling cuttings ash, and the effect of grinding time(0~7 min) on the particle size distribution and specific surface area of the oil-based drilling cuttings ash was studied. The mechanical properties of the mortar specimens mixed with oil-based drilling cuttings ash were analyzed, and XRD, SEM and FTIR microscopic analysis were conducted. The results show that compared with the oil-based drilling cuttings ash without grinding treatment, the particle size distribution range of the oil-based drilling cuttings ash after grinding for 3 min is reduced to 1.220~40.100 μm, the D50 is decreased by 60.9%, and the specific surface area is increased by 27.6%. Compared with the oil-based drilling cuttings ash from other grinding times, the 28 d compressive strength of the mortar specimens prepared by replacing 30% cement with oil-based drilling cuttings ash from grinding for 3 min is the highest, and the 28 d flexural strength is high. The appropriate grinding time can promote the secondary hydration reaction between the active SiO2, Al2O3, etc. in the oil-based drilling cuttings ash and the cement hydration product Ca(OH)2 to generate C-S-H gel and AFt, thus improving the structural compactness of the mortar.

张显河,文华,郑召,等.高速机械粉磨对油基钻屑灰渣活性的影响[J].混凝土与水泥制品,2024(2):88-92. ZHANG X H,WEN H,ZHENG Z,et al.Effect of high-speed mechanical grinding on activity of oil-based drilling cuttings ash[J].China Concrete and Cement Products,2024(2):88-92.

大掺量固废混凝土的制备及性能研究

钱耀丽1，2，刘远祥3，王琼1，2

2024年第2期

摘要

引用本文

摘要：将粉煤灰、矿粉、不同类型的钢渣粉按不同质量比（mF∶mK∶mG分别为60∶32∶8、60∶28∶12、60∶24∶16、50∶40∶10、50∶35∶15、50∶30∶20）制备了三元复合掺合料，确定了最佳钢渣粉类型和mF∶mK∶mG。在此基础上，通过调整砂率、水胶比、减水剂掺量等方式制备了大掺量固废混凝土（固废总量≥70%），研究了其工作性、力学及耐久性能。结果表明：综合考虑胶砂流动度、三元复合掺合料的活性指数、经济性和环境效益，推荐选用原状钢渣粉，并控制mF∶mK∶mG为60∶32∶8；制备的大掺量固废混凝土的工作性、力学及耐久性能均较好，满足相关设计要求，并推荐采用聚羧酸减水剂，不推荐采用以萘系减水剂与脂肪族减水剂复配而成的复合减水剂。 Abstract: A ternary composite admixture was prepared by using fly ash, mineral powder, and different types of steel slag powder in different mass ratios (mF∶mK∶mG of 60∶32∶8, 60∶28∶12, 60∶24∶16, 50∶40∶10, 50∶35∶15, 50∶30∶20, respectively), and the optimal type of steel slag powder and mF∶mK∶mG were determined. On this basis, the concrete with high content of solid waste(≥70%) was prepared by adjusting sand ratio, water-cement ratio, and water reducing agent content, and its workability, mechanical properties, and durability were studied. The results show that considering the fluidity of the mortar, the activity index of the ternary composite admixture, economic and environmental benefits, it is recommended to choose the original steel slag powder and control the mF∶mK∶mG of 60∶32∶8. The workability, mechanical properties, and durability of the prepared concrete with high content of solid waste are good, meeting relevant design requirements. In addition, it is recommended to use polycarboxylate water reducing agent, and it is not recommended to use composite water reducing agent composed of naphthalene based water reducing agent and aliphatic water reducing agent.

钱耀丽,刘远祥,王琼.大掺量固废混凝土的制备及性能研究[J].混凝土与水泥制品,2024(2):93-96. QIAN Y L,LIU Y X,WANG Q.Study on preparation and properties of concrete with high content of solid waste[J].China Concrete and Cement Products,2024(2):93-96.

采空区治理用尾矿砂注浆材料的制备及性能研究

余熠，石研然，朱鹏飞，张栋，彭涛

2024年第2期

摘要

引用本文

摘要：为了解决常用的矿山采空区治理用注浆材料凝结时间长、析水率高、结石率低、水下浇筑时水泥流失量大、硬化后易脱空等问题，制备了一种尾矿砂注浆材料，并通过添加性能调节剂CA-Ⅳ、调整原材料配比对其性能进行了优化。结果表明：优化后的尾矿砂注浆材料工作性得到明显改善，凝结时间大幅缩短，24 h竖向膨胀率、结石率和28 d抗压强度均有大幅提高，水泥流失量显著降低。 Abstract: In order to solve the problems of long setting time, high water precipitation rate, low stone rate, large cement loss during underwater pouring, and easy void formation after hardening of commonly used grouting materials for mining goaf treatment, a tailings sand grouting material was prepared, and its performance was optimized by adding performance regulator CA-Ⅳ and adjusting the compatibility of raw materials. The results show that the workability of the optimized tailings sand grouting material is significantly improved, the setting time is greatly shortened, the 24 h vertical expansion rate, stone rate and 28 d compressive strength are significantly improved, and the cement loss is significantly reduced.

余熠,石研然,朱鹏飞,等.采空区治理用尾矿砂注浆材料的制备及性能研究[J].混凝土与水泥制品,2024(2):97-99,103. YU Y,SHI Y R,ZHU P F,et al.Preparation and performance study of tailings sand grouting material for mining goaf treatment[J].China Concrete and Cement Products,2024(2):97-99,103.

不同活化方式对钼尾矿粉性能的影响

陈荣健1，孟维琦2，*，范佳志1，杨鹰2，马昆林2，宋一平2，杜彦昕2

2024年第2期

摘要

引用本文

摘要：研究了不同活化方式（物理活化、物理-热复合活化、热-物理复合活化、物理-化学复合活化）对钼尾矿粉粒度、细度、比表面积、活性的影响，探究了活化钼尾矿粉的掺量（0~30%）对胶砂抗折、抗压强度的影响，并进行了SEM分析。结果表明：与未活化钼尾矿粉相比，几种活化钼尾矿粉的细度和比表面积显著增大，粒径显著减小，且均主要分布在10~100 μm之间；几种活化钼尾矿粉的7 d、28 d活性指数均相差不大，且分别不低于70%、60%；与基准组相比，掺活化钼尾矿粉试件的7 d、28 d抗折、抗压强度均降低，内部结构相对疏松，且存在孔洞和微裂缝。 Abstract: The effects of different activation methods (physical activation, physical-thermal composite activation, thermal-physical composite activation, and physical-chemical composite activation) on the particle size, fineness, specific surface area, and activity of molybdenum tailings powder were studied, and the effects of the content of activated molybdenum tailings powder (0~30%) on the flexural and compressive strength of the mortar were investigated, and the SEM analysis was conducted. The results show that compared with unactivated molybdenum tailings powder, the fineness and specific surface area of several activated molybdenum tailings powder significantly increase, while the particle size significantly decreases, and the particle size is mainly distributed between 10~100 μm. The 7 d and 28 d activity index of several activated molybdenum tailings powders are similar, and are not less than 70% and 60%, respectively. Compared with the black group, the 7 d and 28 d flexural and compressive strength of the specimens with activated molybdenum tailings powder decrease, and the internal structure is relatively loose with pores and microcracks.

陈荣健,孟维琦,范佳志,等.不同活化方式对钼尾矿粉性能的影响[J].混凝土与水泥制品,2024(2):100-103. CHEN R J,MENG W Q,FAN J J,et al.Effect of different activation methods on properties of molybdenum tailings powder[J].China Concrete and Cement Products,2024(2):100-103.

基于三维形貌的水工混凝土抗冲磨性能评价与预测

姜春萌1，2，安世浩1，2，李双喜1，2，吴保国1，2

2024年第2期

摘要

引用本文

摘要：用机械探针测绘了水下钢球法试验中混凝土试件（水胶比分别为0.3、0.4、0.5）在不同冲磨时间（24~120 h）下的三维磨蚀形貌，并计算了磨蚀深度、磨蚀体积和分形维数，在此基础上，用投影寻踪回归（PPR）软件建立了考虑水胶比和冲磨时间的混凝土磨蚀损伤预测模型。结果表明：在水下钢球法试验条件下，混凝土表面形貌与冲磨时间及空间位置有关，可分为损伤区、过渡区和完好区；机械探针法能够较好地表征混凝土的冲磨时变行为；随着冲磨时间的延长，试件的磨蚀深度、磨蚀体积不断增大，分形维数增至2.60左右时逐渐趋于稳定；随着水胶比的增加，试件的磨蚀深度、磨蚀体积和分形维数均增大；建立的混凝土磨蚀损伤预测模型的计算精度较高，可为实际工程中水工混凝土的抗冲磨性能评价及寿命预测提供参考。 Abstract: The three-dimensional abrasion morphology of concrete specimens with water-cement ratios of 0.3, 0.4, and 0.5, respectively in underwater steel ball method tests was measured by using digital mechanical probe at different abrasion times (24~120 h), and the abrasion depth, abrasion volume, and fractal dimension were calculated. Based on this, a concrete abrasion damage prediction model considering water-cement ratio and abrasion time was established by using Projection Pursuit Regression (PPR) software. The results show that under the underwater steel ball method test conditions, the surface morphology of concrete is related to the abrasion time and position, and can be divided into abrade zone, transition zone, and intact zone. The digital mechanical probe method can better characterize the time-varying behavior of concrete abrasion. As the abrasion time prolongs, the abrasion depth and abrasion volume of the specimen continue to increase, and the fractal dimension gradually stabilizes when it reaches around 2.60. As the water-cement ratio increases, the abrasion depth, abrasion volume, and fractal dimension of the specimen all increase. The calculation accuracy of the established concrete abrasion damage prediction model is high, which can provide a reference for the evaluation of the scouring-abrasion resistance and life prediction of hydraulic concrete in practical engineering.

姜春萌,安世浩,李双喜,等.基于三维形貌的水工混凝土抗冲磨性能评价与预测[J].混凝土与水泥制品,2024(2):82-87. JIANG C M,AN S H,LI S X,et al.Evaluation and prediction on scouring-abrasion resistance of hydraulic concrete based on three-dimensional morphology[J].China Concrete and Cement Products,2024(2):82-87.

GB 175—2023《通用硅酸盐水泥》主要条款解读

颜碧兰，肖忠明*，王昕，刘晨，郭俊萍，朱文尚，杜勇，郑旭，魏丽颖，宋立春，席劲松，温培艳

2024年第2期

摘要

引用本文

摘要：新修订的GB 175—2023《通用硅酸盐水泥》已于2023年11月27日发布，将于2024年6月1日实施。为便于使用方更准确地理解标准条款的具体含义，正确贯彻实施标准的具体要求和规定，介绍了标准的修订背景和意义，并对标准的主要条款进行了解读。 Abstract: The newly revision national standard of GB 175—2023 Common Portland Cement was officially released on November 27th, 2023, and it will be implemented on June 1st, 2024. In order to facilitate understanding the specific meaning of the standard provisions and correctly implement the specific requirements and the standard provisions for users, the background and significance of the revision of the standard are introduced, and the main provisions of the standard are interpreted.

颜碧兰,肖忠明,王昕,等.GB 175—2023《通用硅酸盐水泥》主要条款解读[J].混凝土与水泥制品,2024(2):76-81,92. YAN B L,XIAO Z M,WANG X,et al.Interpretation of main provisions in GB 175—2023 Common Portland Cement[J].China Concrete and Cement Products,2024(2):76-81,92.

膨胀聚苯乙烯颗粒泡沫混凝土结构设计与应用

刁桂芝1，王爱军1，王武祥1，2，张磊蕾1，吴子豪1，2，廖礼平1

2024年第2期

摘要

引用本文

摘要：基于导热系数和抗压强度设计原则，从膨胀聚苯乙烯颗粒优选、水泥基复合胶凝材料硬化基体优化、微孔化、固体相体积占比等方面考虑，研究了不同干表观密度膨胀聚苯乙烯颗粒泡沫混凝土（PFC）的导热系数和抗压强度，通过配合比优化，实现了PFC结构性能、导热系数和抗压强度三者的协调；采用优化后的配合比，可制备出综合性能较佳的建筑保温与结构一体化墙体砌筑材料。 Abstract： Based on the design principles of thermal conductivity and compressive strength, the thermal conductivity and compressive strength of expanded polystyrene granular foamed concrete(PFC) with different dry apparent densities were studied from the aspects of expanded polystyrene particles optimization, hardened matrix of cement-based composite cementitious materials optimization, microporosization and solid phase volume ratios. Through mix proportion optimization, the coordination of PFC structural performance, thermal conductivity and compressive strength was obtained. The optimized mix proportion can be used to prepare building insulation and structural integrated wall masonry materials with better comprehensive performance.

刁桂芝,王爱军,王武祥,等.膨胀聚苯乙烯颗粒泡沫混凝土结构设计与应用[J].混凝土与水泥制品,2024(2):65-69,75. DIAO G Z,WANG A J,WANG W X,et al.Structural design and application of expanded polystyrene granular foamed concrete[J].China Concrete and Cement Products,2024(2):65-69,75.

装配式混凝土剪力墙-梁钢套筒节点性能试验研究

吴东平，周禹，李成玉*

2024年第2期

摘要

引用本文

摘要：为研究螺栓连接的装配式剪力墙-梁节点的抗震性能，提出了一种在剪力墙内预埋高强螺杆，然后通过钢端板与混凝土梁连接的节点，设计了3组缩尺装配式试件与1组缩尺现浇试件，并对其进行了拟静力试验，研究分析了节点的破坏形态、滞回曲线、骨架曲线、刚度退化、耗能能力等。结果表明：3组装配式试件的滞回曲线呈“弓形”，且装配式试件的峰值承载力比现浇试件提升了8.42%~21.05%，位移延性系数在4.28~4.66之间，等效黏滞阻尼系数均在0.18~0.24之间，证明了该装配式节点具有良好的抗震能力和变形能力。 Abstract: In order to study the seismic performance of bolt-connected prefabricated shear wall-beam joints, a joint with a high strength screw embedded in the shear wall and then connected with a concrete beam through a steel end plate was proposed. Three sets of reduced scale prefabricated specimens and one set of reduced scale cast-in-place specimens were designed and the pseudo-static tests were carried out. The failure mode, hysteretic curve, skeleton curve, stiffness degradation and energy dissipation capacity of the joint were studied and analyzed. The results show that the hysteresis curves of the three groups of assembled specimens are "bow", the peak bearing capacity of the assembled specimens is increased by 8.42%~21.05% compared with the cast-in-place specimens, the displacement ductility coefficient is between 4.28~4.66, and the equivalent viscous damping coefficient is between 0.18~0.24, indicating that the assembled joints have good seismic resistance and deformation ability.

吴东平,周禹,李成玉.装配式混凝土剪力墙-梁钢套筒节点性能试验研究[J].混凝土与水泥制品,2024(2):70-75. WU D P,ZHOU Y,LI C Y.Experimental study on the performance of steel sleeve joints of prefabricated concrete shear wall-beam[J].China Concrete and Cement Products,2024(2):70-75.

河砂粒径与纤维类型对ECC力学性能的影响

李彦宵1，于本田1，*，张占旭2，吴明星1，谢超1

2024年第2期

摘要

引用本文

摘要：研究了河砂粒径（0~0.30、0~0.60、0~1.18、0~2.36 mm）与纤维类型（PVA、PE、PP、BF纤维）对工程水泥基复合材料（ECC）力学性能的影响，并进行了SEM分析。结果表明：随着河砂粒径的增大，试件的28 d极限拉应变、峰值应力和抗折强度基本均降低，多缝开裂特征逐渐减弱；4种纤维中，PVA纤维对ECC单轴拉伸性能和抗折性能的提高效果最好；PVA纤维与各粒级的河砂均具有良好的匹配性，在基体中分散较均匀。 Abstract: The influence of river sand particle size (0~0.30, 0~0.60, 0~1.18, 0~2.36 mm) and fiber types (PVA, PE, PP, BF fibers) on the mechanical properties of engineered cementitious composites (ECC) was studied, and SEM analysis was conducted. The results show that with the increase of river sand particle size, the 28 d ultimate tensile strain, peak stress, and flexural strength of the specimens are basically reduced, and the multi crack cracking characteristics gradually weaken. Among the four types of fibers, PVA fiber has the best effect on improving the uniaxial tensile and flexural properties of ECC. PVA fibers have good compatibility with various particle size of river sand and are evenly dispersed in the matrix.

李彦宵,于本田,张占旭,等.河砂粒径与纤维类型对ECC力学性能的影响[J].混凝土与水泥制品,2024(2):51-55,60. LI Y X,YU B T,ZHANG Z X,et al.Influence of river sand particle size and fiber type on mechanical properties of ECC[J].China Concrete and Cement Products,2024(2):51-55,60.

钢-聚甲醛混杂纤维混凝土的力学性能和韧性研究

杨九光

2024年第2期

摘要

引用本文

摘要：研究了分别单掺和混掺不同掺量和长度的钢纤维和聚甲醛（POM）纤维对混凝土力学性能和韧性的影响，并进行了SEM分析。结果表明：单掺POM纤维对混凝土的抗压强度不利，但采用合适掺量和长度的POM纤维能有效提高混凝土的劈裂抗拉强度；单掺0.50%~1.50%的钢纤维能有效提高混凝土的抗压强度和劈裂抗拉强度；与单掺1.50%的钢纤维相比，混掺适量钢纤维和POM纤维能进一步提高混凝土的力学性能和韧性，推荐钢纤维和POM纤维的混掺比例为5∶1。 Abstract: The effects of different volume contents and lengths of steel fiber and polyoxymethylene(POM) fiber on the mechanical properties and toughness of concrete were studied, and the SEM analysis was conducted. The results show that the single addition of POM fiber is detrimental to the compressive strength of concrete, but adding appropriate content and length of POM fiber can effectively improve the splitting tensile strength of concrete. Adding 0.50%~1.50% content of steel fiber can effectively improve the compressive strength and splitting tensile strength of concrete. Compared with the single addition of 1.50% content of steel fiber, the addition of an appropriate content of steel fiber and POM fiber can further improve the mechanical properties and toughness of concrete, and the recommended mixing ratio of steel fiber and POM fiber is 5∶1.

杨九光.钢-聚甲醛混杂纤维混凝土的力学性能和韧性研究[J].混凝土与水泥制品,2024(2):56-60. YANG J G.Study on mechanical properties and toughness of steel-polyoxymethylene hybrid fiber reinforced concrete[J].China Concrete and Cement Products,2024(2):56-60.

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