第一期_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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第一期

超细低碳胶凝材料的制备及应用研究

崔雷1，范凯1，周桃义2，周新2，陈浩2，王裕银3，王麟4，柏立果5，陈勤丰6，马友来6，郦军科7，刘斌8

2024年第1期

摘要

引用本文

摘要：为了在减碳的同时实现建材企业的降本增效，以矿渣粉和粉煤灰（质量比5∶5）为主要原材料，制备了一种超细低碳胶凝材料，研究了其对混凝土和水泥性能的影响。结果表明：在混凝土制备过程中，用适量超细低碳胶凝材料等质量部分替代水泥，可以有效提高混凝土的力学性能；在水泥生产过程中，用超细低碳胶凝材料等质量替代0~15%的水泥原料，对水泥的标准稠度用水量和凝结时间影响不大，但能有效提高水泥的抗折、抗压强度。研究结果可为建筑行业减碳增效途径的选择提供参考。 Abstract: In order to achieve cost reduction and efficiency improvement for building materials enterprises while reducing carbon emissions, a ultra-fine low-carbon cementitious material was prepared by using slag powder and fly ash (the mass ratio of 5∶5) as the main raw materials, and its impact on the properties of concrete and cement was studied. The results show that in the process of concrete preparation, replacing cement with appropriate amounts of ultra-fine low-carbon cementitious materials can effectively improve the mechanical properties of concrete. In the process of cement production, replacing 0~15% of cement raw materials with ultra-fine low-carbon cementitious materials has little effect on the standard consistency water consumption and setting time of cement, but can effectively improve the flexural and compressive strength of cement. The research results can provide reference for the selection of carbon reduction and efficiency improvement pathways in the construction industry.

崔雷,范凯,周桃义,等.超细低碳胶凝材料的制备及应用研究[J].混凝土与水泥制品,2024(1):87-89. CUI L,FAN K,ZHOU T Y,et al.Preparation and application research of ultra-fine low-carbon cementitious materials[J].China Concrete and Cement Products,2024(1):87-89.

矿渣-脱硫石膏-水泥复合胶凝材料的性能研究

王安辉1，黄虎2，*，张艳芳1，倪娇娇1，荣辉2，3，*，戴骁蒙4，刘鑫4，樊立龙5，赵健5

2024年第1期

摘要

引用本文

摘要：制备了矿渣-脱硫石膏-水泥复合胶凝材料，通过抗压强度试验确定了其最佳配合比，并进行了微观机理分析。抗压强度结果表明：相同水泥掺量（10%）下，随着脱硫石膏掺量的增加，试件的28 d抗压强度先增大后减小；相同m矿渣∶m脱硫石膏（8.0∶1.0）下，随着水泥掺量的增加，试件的28 d抗压强度先增大后减小；最佳m矿渣∶m脱硫石膏∶m水泥为75.5∶9.5∶15.0。28 d微观结果表明：随着脱硫石膏掺量的增加，水化产物生成量增多，AFt由针状变为粗棒状，但同时CaSO4·2H2O量也较多；随着水泥掺量的增加，CaSO4·2H2O和矿渣颗粒减少，无胶结性的SiO2增多，AFt由针状先变为粗棒状再变为针状和粗棒状共同存在。 Abstract: A slag-desulfurization gypsum-cement composite cementitious material was prepared, and its optimal mix proportion was determined through compressive strength tests, and the microscopic analysis was conducted. The compressive strength results show that under the same cement content (10%), with the increase of desulfurization gypsum content, the 28 d compressive strength of the specimens first increases and then decreases. Under the same mslag ∶ mdesulfurization gypsum (8.0:1.0), with the increase of cement content, the 28 d compressive strength first increases and then decreases. The optimal mslag ∶ mdesulfurization gypsum ∶ mcement is 75.5∶9.5∶15.0. The 28 d microscopic results show that with the increase of desulfurization gypsum content, the amount of hydration products increases, and the AFt changes from needle shaped to coarse rod shaped, but the amount of CaSO4·2H2O is higher. With the increase of cement content, the amount of CaSO4·2H2O and slag particles decrease, and non-cementitious SiO2 increases, and the AFt changes from needle shaped to coarse rod shaped first, and then to needle shaped and coarse rod shaped coexisting.

王安辉,黄虎,张艳芳,等.矿渣-脱硫石膏-水泥复合胶凝材料的性能研究[J].混凝土与水泥制品,2024(1):90-93. WANG A H,HUANG H,ZHANG Y F,et al.Performance study of slag-desulfurization gypsum-cement composite cementitious material[J].China Concrete and Cement Products,2024(1):90-93.

再生细骨料混凝土的性能研究进展

陈春红1，2，俞江1，刘荣桂2，*，朱平华1，王磊1，伍金龙1，陈云春1

2024年第1期

摘要

引用本文

摘要：合理使用再生细骨料（以下简称RFA）可同时解决建筑垃圾的资源化利用问题和天然砂、石过度开采引起的环境问题。介绍了RFA的颗粒形状、空隙率、吸水率、有害物质含量等性能，总结了RFA的性能强化措施，综述了再生细骨料混凝土（以下简称RFAC）的工作性、力学性能和耐久性能，并对其机理进行了分析，可为RFA的进一步推广应用提供参考。 Abstract: The rational use of recycled fine aggregate(RFA) can simultaneously solve the problem of resource utilization of construction waste and environmental problems caused by excessive exploitation of natural sand and stone. The particle shape, porosity, water absorption and harmful substance content of RFA are introduced, and the performance strengthening measures of RFA are summarized. The workability, mechanical properties and durability of recycled fine aggregate concrete(RFAC) are summarized, and its mechanism is analyzed, which can provide a reference for the further promotion and application of RFA.

陈春红,俞江,刘荣桂,等.再生细骨料混凝土的性能研究进展[J].混凝土与水泥制品,2024(1):94-99. CHEN C H,YU J,LIU R G,et al.Research progress on performance of recycled fine aggregate concrete[J].China Concrete and Cement Products,2024(1):94-99.

水泥浆废水对MgO激发矿渣胶凝材料水化特性的影响

陶良敬，荆喆，谭园园

2024年第1期

摘要

引用本文

摘要：研究了水泥浆废水（以下简称CWw）等质量替代0、20.0%、25.0%、33.3%、50.0%的水对MgO激发矿渣胶凝材料（以下简称WAAS）水化特性的影响，并测试了其抗压强度和孔结构。结果表明：掺入CWw有效促进了WAAS的水化进程，且CWw掺量越大，WAAS的主要水化放热峰越显著，热失重量越大，水化产物生成量越多；随着CWw掺量的增加，WAAS的抗压强度先增大后减小，最佳掺量为33.3%；WAAS的累计孔隙率随着CWw掺量的增加而减小，微观结构更密实。 Abstract: The effects of replacing 0, 20.0%, 25.0%, 33.3% and 50.0% of water with cement slurry wastewater (CWw) on the hydration characteristics of MgO activated slag cementitious materials(WAAS) were studied, and the compressive strength and pore structure were tested. The results show that the addition of CWw effectively promotes the hydration process of WAAS, and the larger the CWw content, the more significant the main hydration heat release peak of WAAS, the greater the heat loss weight, and the more hydration products are generated. With the increase of CWw content, the compressive strength of WAAS first increases and then decreases, and the optimal content is 33.3%. The cumulative porosity of WAAS decreases with the increase of CWw content, resulting in a denser microstructure.

陶良敬,荆喆,谭园园.水泥浆废水对MgO激发矿渣胶凝材料水化特性的影响[J].混凝土与水泥制品,2024(1):100-103. TAO L J,JING Z,TAN Y Y.Effect of cement slurry wastewater on hydration characteristics of MgO activated slag cementitious materials[J].China Concrete and Cement Products,2024(1):100-103.

基于工程监测和数值模拟的混凝土竖向施工缝约束程度研究

杨睿，李明，徐思睿

2024年第1期

摘要

引用本文

摘要：对存在竖向施工缝的某厂房顶板和隧道叠合墙结构进行了温度、应变监测和数值模拟。结果表明：顶板和叠合墙在靠近竖向施工缝处的变形均受到显著约束，但其应变峰值和单位温度变形均比靠近水平施工缝处的大；在数值模拟时，将水平施工缝以下底部侧墙和底板的旧混凝土弹性模量均取为实测值，将竖向施工缝一侧的先浇顶板和地连墙的混凝土弹性模量分别取为实测值的25%和50%左右，可使应变计算值与监测值的误差较低；在混凝土抗裂性评估计算中，应考虑对竖向施工缝处旧混凝土的弹性模量进行适当折减。 Abstract: The temperature strain monitoring and numerical simulation of a factory building roof and a tunnel composite wall structure with vertical construction joints were carried out. The results show that the deformation of roof and composite wall near the vertical construction joint is significantly constrained, but the peak strain and unit temperature deformation are greater than those near the horizontal construction joint. In the simulation calculation, when the elastic modulus of the old concrete of the bottom side wall and bottom plate below the horizontal construction joint is taken as the measured value, and the elastic modulus of the concrete on the first poured roof and the diaphragm wall on one side of the vertical construction joint is taken as about 25% and 50% of the measured value, respectively, the error between the calculated strain value and the monitoring value is relatively low. In the evaluation and calculation of concrete crack resistance, appropriate reduction of the elastic modulus of the old concrete at the vertical construction joint should be considered.

杨睿,李明,徐思睿.基于工程监测和数值模拟的混凝土竖向施工缝约束程度研究[J].混凝土与水泥制品,2024(1):81-86. YANG R,LI M,XU S R.Study on restraint degree of concrete vertical construction joints based on engineering monitoring and numerical simulation[J].China Concrete and Cement Products,2024(1):81-86.

粮食平房仓“结构-隔热”一体化墙板热工性能研究

赵金全1，刘衡1，丁永刚1,*，周龙2，孙蕾3

2024年第1期

摘要

引用本文

摘要：为了提高散装粮食平房仓墙体保温隔热性能，提出了一种新型“结构-隔热”一体化墙板（SIW墙板）。通过试验和数值模拟，分析了保温板厚度、连接件等对SIW墙板热工性能的影响，揭示了内、外叶墙板温度、热流密度随时间的变化规律，得到了SIW墙板的传热系数，基于传热系数指标开展了SIW墙板在不同储粮生态区的适用性评价。结果表明：相较于传统平房仓砖砌墙体，保温板厚度为50 mm和80 mm的SIW墙板传热系数分别降低了45.81%和56.13%；GFRP连接件在SIW墙板中的热桥效应不显著，对墙板温度场的影响较小；相较于保温板厚度为50 mm的SIW墙板，80 mm厚的SIW墙板能满足3个储粮生态区对粮食平房仓墙体传热性能的要求。 Abstract: In order to improve the thermal insulation performance of granary walls, a new type of granary wall panel with "structural-insulation" integrated wall panels(SIW) was proposed. Through the experimental study and numerical simulation, the influence of thickness of insulation boards and connectors on the thermal performance of SIW wall panels was analyzed, the change rule of temperature and heat flux of interior and outer wall panels with time was analyzed, the heat transfer coefficients of SIW wall panels was obtained, and the evaluation of the applicability of SIW wall panels in different grain storage ecological zones was carried out based on the index of heat transfer coefficient. The results show that compared with the traditional granary walls, the heat transfer coefficients of SIW wall panels with insulation board thickness of 50 mm and 80 mm are reduced by 45.81% and 56.13%, respectively. The thermal bridging effect of GFRP connectors in SIW wall panels is not significant and has a small effect on the temperature field of the wall panels. Compared to SIW wall panels with a thickness of 50 mm, the 80 mm thickness SIW wall panels can satisfy the requirements of heat transfer performance of granary walls in three grain storage ecological zones.

赵金全,刘衡,丁永刚,等.粮食平房仓“结构-隔热”一体化墙板热工性能研究[J].混凝土与水泥制品,2024(1):67-73. ZHAO J Q,LIU H,DING Y G,et al.Study on thermal performance of "structure-insulation" integrated wall panels for bulk grain granary[J].China Concrete and Cement Products,2024(1):67-73.

CFRP加固受损再生混凝土板的抗弯性能试验研究

王帮康1，周理1，2，*，郭广1

2024年第1期

摘要

引用本文

摘要：为了探究CFRP加固受损再生混凝土板的抗弯性能，制作了4块再生混凝土板 (再生粗骨料取代率为50%)，考虑预损伤等级及加载循环次数对试件加固性能的影响。通过试验与数值模拟研究，分析了试件的破坏模式、荷载-位移曲线及承载能力，并对规范中的承载力计算公式进行了修正。结果表明：CFRP加固再生混凝土板的破坏模式为CFRP脱落；当预损伤等级＜0.4Pm（极限承载力）时，加固后的试件承载力变化不大；当预损伤等级≥0.4Pm时，加固后的试件承载力随预损伤等级的提升而降低；当预损伤等级＜0.9Pm时，加载循环次数对试件的承载力影响很小；当预损伤等级≥0.9Pm时，试件承载力随加载循环次数的增大而显著降低；试件承载力随着CFRP加固层数的增加而增大；修正后的承载力计算公式具有较高的计算精度。 Abstract: To investigate the flexural behavior of recycled aggregate concrete (RAC) slabs strengthened with carbon fiber-reinforced polymer (CFRP), four RAC slabs with a recycled coarse aggregate replacement rate of 50% were fabricated and tested. Considering the influence of pre-damage level and loading cycle on the strengthening performance of specimens, the failure mode, load-displacement curve, and bearing capacity of specimens were analyzed through experimental and numerical studies. The results show that the failure mode of CFRP-strengthened RAC slabs is CFRP-debonding failure. When the pre-damage level is less than 0.4Pm , the bearing capacity of the specimens after strengthening does not change significantly. When the pre-damage level is greater than or equal to 0.4Pm , the bearing capacity of the specimens after strengthening decreases with the increase of the pre-damage level. When the pre-damage level is less than 0.9Pm , the loading cycle has little effect on the bearing capacity. When the pre-damage level is greater than or equal to 0.9Pm , the bearing capacity of the specimens significantly decreases with the increase of the loading cycle. The bearing capacity of the specimens increases with the increase of the number of CFRP layers. The calculation formula of the bearing capacity is modified, and the modified formula has high calculation accuracy.

王帮康,周理,郭广.CFRP加固受损再生混凝土板的抗弯性能试验研究[J].混凝土与水泥制品,2024(1):74-80. WANG B K,ZHOU L,GUO G.Experimental study on flexural performance of damaged recycled aggregate concrete slabs strengthened with CFRP[J].China Concrete and Cement Products,2024(1):74-80.

钢纤维自密实混凝土的工作性、力学及耐久性能研究

卢佳林1，牛子东2，蓝国平2，刘东3，王子杰3，兰聪3

2024年第1期

摘要

引用本文

摘要：研究了钢纤维的形状（剪切型、端钩型）、长径比（46.6、53.9）和体积掺量（0、0.4%、0.6%、0.8%、1.0%）对自密实混凝土工作性、力学性能和耐久性能的影响。结果表明：相同掺量下，3种类型的钢纤维中，长径比为46.6的端钩型钢纤维自密实混凝土工作性、力学性能均相对较好；随着钢纤维掺量的增加（≥0.6%），自密实混凝土的工作性降低，抗压强度小幅增大，劈裂抗拉强度和轴向抗拉强度显著增大，早期收缩性能和抗裂性能提升，干燥收缩值减小。 Abstract: The influence of the shape (shear type, end hook type), aspect ratio (46.6, 53.9) and volume content (0, 0.4%, 0.6%, 0.8%, 1.0%) of steel fiber on the workability, mechanical properties and durability of self-compacting concrete was studied. The results show that under the same content, among the three types of steel fibers, the end hook type steel fiber with aspect ratio of 46.6 reinforced self-compacting concrete has relatively better workability and mechanical properties. With the increase of steel fiber content(≥0.6%), the workability of self-compacting concrete decreases, the compressive strength slightly increases, the splitting tensile strength and axial tensile strength significantly increase, the early shrinkage performance and crack resistance performance improve, and the dry shrinkage value decreases.

卢佳林,牛子东,蓝国平,等.钢纤维自密实混凝土的工作性、力学及耐久性能研究[J].混凝土与水泥制品,2024(1):56-59. LU J L,NIU Z D,LAN G P,et al.Study on workability, mechanical properties and durability of steel fiber reinforced self-compacting concrete[J].China Concrete and Cement Products,2024(1):56-59.

纤维增强地聚物混凝土力学及抗冲击性能研究

郝丽君1，王德法2，宋佳瑶3，郝淑亭4

2024年第1期

摘要

引用本文

摘要：对比研究了单掺钢纤维（0、1%、2%、3%）和碳纤维（0、0.1%、0.2%、0.3%）对地聚物混凝土力学性能和抗冲击性能的影响，分析了试件的破坏形态及纤维作用机理。结果表明：随着碳纤维掺量的增加，试件的抗压强度、劈裂抗拉强度、抗折强度和抗冲击性能总体变化不大；随着钢纤维掺量的增加，试件的抗压强度和抗折强度增大，劈裂抗拉强度和抗冲击性能先提高后降低，最佳钢纤维掺量为2%。 Abstract: The effects of single addition of steel fiber (0, 1%, 2%, 3%) and carbon fiber (0, 0.1%, 0.2%, 0.3%) on the mechanical properties and impact resistance of geopolymer concrete were compared and studied, and the failure mode and fiber action mechanism of the specimen were analyzed. The results show that with the increase of carbon fiber content, the overall changes in compressive strength, splitting tensile strength, flexural strength, and impact resistance of the specimen are not significant. With the increase of steel fiber content, the compressive strength and flexural strength of the specimen increase, the splitting tensile strength and impact resistance first increase and then decrease, and the optimal steel fiber content is 2%.

郝丽君,王德法,宋佳瑶,等.纤维增强地聚物混凝土力学及抗冲击性能研究[J].混凝土与水泥制品,2024(1):60-63,73. HAO L J,WANG D F,SONG J Y,et al.Study on mechanical properties and impact resistance of fiber reinforced geopolymer concrete[J].China Concrete and Cement Products,2024(1):60-63,73.

纤维增强磷酸钾镁水泥砂浆工作性、力学性能与韧性研究

孙旻1，王军2，王洋3

2024年第1期

摘要

引用本文

摘要：为了改善磷酸钾镁水泥（MKPC）砂浆的脆性，研究了聚甲醛（POM）纤维的掺量（0~2.0%）对MKPC砂浆工作性、力学性能和韧性的影响，并进行了SEM分析。结果表明：随着POM纤维掺量的增加，砂浆的流动度和抗压强度均降低，抗折强度和折压比均先增大后减小，韧性提升；POM纤维在砂浆基体中主要发生拔出破坏，其桥连作用有效抑制了裂缝的产生和扩展。 Abstract: In order to improve the brittleness of potassium magnesium phosphate cement (MKPC) mortar, the effects of the content of polyoxymethylene (POM) fibers (0~2.0%) on the workability, mechanical properties and toughness of MKPC mortar were studied, and SEM analysis was conducted. The results show that with the increase of the content of POM fiber, the fluidity and compressive strength of the mortar decrease, while the flexural strength and flexural compression ratio first increase and then decrease, and the toughness improves. POM fibers mainly undergo pull-out failure in the mortar matrix, and their bridging effect effectively suppresses the generation and propagation of cracks.

孙旻,王军,王洋.纤维增强磷酸钾镁水泥砂浆工作性、力学性能与韧性研究[J].混凝土与水泥制品,2024(1):64-66. SUN M,WANG J,WANG Y.Study on workability, mechanical properties and toughness of fiber reinforced potassium magnesium phosphate cement mortar[J].China Concrete and Cement Products,2024(1):64-66.

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