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混凝土研究
白 锐1，杨连云2，夏求林3，4，*，吕兴栋3，4，周世华3，4，王媛怡3，4，蒋文广3，4，王世美3，4
白锐,杨连云,夏求林,等.长距离运输衬砌混凝土性能研究[J].混凝土与水泥制品,2025(7):30-34,47.
BAI R,YANG L Y,XIA Q L,et al.Study on the performance of lining concrete for long distance transportation[J].China Concrete and Cement Products,2025(7):30-34,47.
王继祖1，路荣波1，王汉增2
王继祖,路荣波,王汉增.海洋环境下不同防护涂层对混凝土抗氯离子渗透性能的影响[J].混凝土与水泥制品,2025(7):26-29,47.
WANG J Z,LU R B,WANG H Z.Effect of different protective coatings on the chloride ion penetration resistance of concrete in marine environment[J].China Concrete and Cement Products,2025(7):26-29,47.
王宇平，李建章，张新东*
王宇平,李建章,张新东.膨胀剂与养护温度耦合作用下混凝土的性能研究[J].混凝土与水泥制品,2025(7):21-25.
WANG Y P,LI J Z,ZHANG X D.Study on the performance of concrete under the coupling effect of expansion agents and curing temperatures[J].China Concrete and Cement Products,2025(7):21-25.
王子宁1，王 南1，*，李 燃1，卢春龙1，高欣然1，关 岩2，3，毕万利3，龚刘胜2
摘 要：用铁铝酸盐水泥（FAC）对硫氧镁水泥（MOSC）进行改性，研究了FAC掺量（0、10%、20%、30%、40%）对MOSC耐水性的影响，并基于万能试验机、X射线衍射仪（XRD）、扫描电子显微镜（SEM）、压汞仪（MIP）等测试分析了FAC对MOSC浸水前后体积稳定性、抗压强度、物相组成、微观形貌及孔结构的影响。结果表明：当FAC掺量为10%时，MOSC的28 d抗压强度和28 d耐水软化系数相较于其他试件最优，分别为74.5 MPa和0.90，相较空白组分别提高了26.92%和20.26%；掺入FAC后，MOSC中出现新的水化产物钙矾石和无定形水化产物，填充孔隙，使MOSC的基体结构致密，提高其耐水性。但当FAC掺量超过30%时，MOSC体系中5·1·7相含量显著降低，且浸水后未反应MgO的水化和二水石膏的形成导致基体膨胀，使其耐水性下降。Abstract: Ferroaluminate cement (FAC) was used to modify magnesium oxysulfate cement (MOSC), and effect of FAC content (0, 10%, 20%, 30%, 40%) on the water resistance of MOSC was investigated. The influence of the volume stability, compressive strength, phase composition, microstructure, and pore structure of MOSC before and after immersion in water were analyzed based on the universal testing machine, X-ray diffraction (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP). The results show that when the content of FAC is 10%, the 28 d compressive strength and 28 d water softening coefficient of MOSC are best with the values of 74.5 MPa and 0.90 respectively, which increase by 26.92% and 20.26% compared with the blank group respectively. After adding FAC, new hydration products such as ettringite and amorphous hydration products form to fill the pores in MOSC and densify the matrix structure, which improves the water resistance of MOSC. However, when the content of FAC is more than 30%, the content of 5·1·7 phase in MOSC system significantly decreases, and the hydration of unreacted MgO and the formation of gypsum result in the expansion of matrix, which leads to a decrease on the water resistance of MOSC after water immersion.
王子宁,王南,李燃,等.铁铝酸盐水泥改性硫氧镁水泥的耐水性研究[J].混凝土与水泥制品,2025(7):15-20.
WANG Z N,WANG N,LI R,et al.Study on the water resistance of magnesium oxysulfate cement modified by ferroaluminate cement[J].China Concrete and Cement Products,2025(7):15-20.
邢琳琳1，陈 光2，*，张 浩3
邢琳琳,陈光,张浩.C60细石自密实混凝土的性能研究[J].混凝土与水泥制品,2025(7):10-14.
XING L L,CHEN G,ZHANG H.Performance study of C60 fine aggregate self-compacting concrete[J].China Concrete and Cement Products,2025(7):10-14.
单鸿猷1，李 倩1，何柯瑶2，蒋元海1，*，刘远祥3，4，5
单鸿猷,李倩,何柯瑶,等.电沉积SiO32-修复混凝土裂缝效果研究[J].混凝土与水泥制品,2025(7):6-9,14.
SHAN H Y,LI Q,HE K Y,et al.Study on the effect of repairing concrete cracks by electrodeposition of SiO32-[J].China Concrete and Cement Products,2025(7):6-9,14.