摘   要：开展了不同体积掺量的钢纤维对海上风电灌浆料以及小型灌浆连接段模型力学性能影响的研究。结果表明：当钢纤维掺量为1.0%时，能在保障灌浆料工作性和微膨胀性能的基础上，灌浆料的28 d抗折强度和抗压强度相较于未掺钢纤维时分别提高了65.4%和31.0%，且灌浆连接段模型的极限承载力和极限位移分别提高了12.0%和15.5%，有效提高了灌浆料的延性；灌浆连接段模型在轴心荷载作用下，主要受力和变形部位为内筒上部剪力键和外筒下部，在今后的灌浆连接段设计中，可对该部位进行适当加强，以便充分发挥灌浆连接段的整体性能。 Abstract: The influence of different volume content of steel fiber on the mechanical properties of offshore wind power grouting material and small grouting connection section model was studied. The results show that when the steel fiber content is 1.0%, the 28 d flexural strength and compressive strength of the grouting material can be increased by 65.4% and 31.0%, respectively, compared to the group without steel fiber, while ensuring the workability and micro expansion performance of the grouting material, and the ultimate bearing capacity and ultimate displacement of the grouting connection section model are improved by 12.0% and 15.5% respectively, which can effectively improve the ductility of the grouting material. Under the action of axial load, the main force and deformation parts are the shear bond of the upper part of the inner cylinder and the lower part of the outer cylinder. In the future grouting connection section design, this part can be appropriately strengthened to give full play to the overall performance of the grouting connection section.

杨医博,丁成,戚玉亮,等.钢纤维对海上风电灌浆料及灌浆连接段模型性能的影响研究[J].混凝土与水泥制品,2024(10):1-6,17. YANG Y B,DING C,QI Y L,et al.Study on the influence of steel fiber on the performance of offshore wind power grouting material and grouting connection section model[J].China Concrete and Cement Products,2024(10):1-6,17.

摘   要：制备了一种超高性能风电灌浆料，通过L16（44）正交试验研究了矿粉、石膏、硅灰、微珠对灌浆料性能的影响，并通过单因素试验研究了膨胀剂和缓凝剂对灌浆料性能的影响，确定了灌浆料的最佳配合比。结果表明：灌浆料的最佳配合比为水泥50%、矿粉2%、石膏3%、硅灰3%、微珠2%；粒径为0.125~0.212、0.212~0.425、0.425~0.850 mm石英砂占比分别为17%、11%、12%，减水剂掺量0.35%，消泡剂掺量0.03%，塑性膨胀剂掺量0.02%，SG掺量0.01%；工程应用表明，灌浆料的各项性能测试结果均满足施工要求，现场施工流动性良好，28 d抗折、抗压强度分别可达22.5 MPa、129.50 MPa，3 h膨胀率、3 h与24 h膨胀率之差分别为0.51%、0.20%。 Abstract: A ultra-high performance wind power grouting material was prepared, and the effects of mineral powder, gypsum, silica fume, and microbeads on the performance of the grouting material were studied through L16(44) orthogonal experiments. The effects of expansion agent and retarder on the performance of the grouting material were studied through single factor experiments, and the optimal mix proportion of the grouting material was determined. The results indicate that the optimal mix proportion for grouting material is 50% content of cement, 2% content of mineral powder, 3% content of gypsum, 3% content of silica fume, and 2% content of microbeads. The proportions of 0.125~0.212 mm, 0.212~0.425 mm, and 0.425~0.850 mm quartz sand are 17%, 11%, and 12%, respectively, water reducing agent content is 0.35%, defoamer content is 0.03%, plastic expansion agent content is 0.02%, and SG content is 0.01%. Engineering applications show that the performance test results of grouting materials meet the construction requirements, and the on-site construction fluidity is good. The 28 d flexural and compressive strength can reach 22.5 MPa and 129.50 MPa, respectively. The 3 h expansion rate and the difference between the 3 h and 24 h expansion rates are 0.51% and 0.20%, respectively.

庞伟琪,张宁,汤瑜,等.超高性能风电灌浆料的制备与性能试验研究[J].混凝土与水泥制品,2024(10):7-11,17. PANG W Q,ZHANG N,TANG Y,et al.Experimental study on preparation and performance of ultra-high performance wind power grouting material[J].China Concrete and Cement Products,2024(10):7-11,17.

摘   要：研究了硅灰掺量、石英砂级配、胶砂比、水胶比、外加剂掺量对海上风电塔筒用超高性能灌浆料工作性和力学性能的影响，并确定了最佳配合比。结果表明：灌浆料的最佳配合比为水胶比0.22、胶砂比1.0、石英砂级配m2.00~0.60 mm∶m0.60~0.28 mm∶m0.28~0.10 mm=54∶23∶23、硅灰掺量6%、复合膨胀剂掺量6%、消泡剂掺量0.10%、塑性膨胀剂掺量0.03%；在最佳配合比下，灌浆料的初始流动度为340 mm，30 min流动度为320 mm，1 d抗压强度为68.7 MPa，3 d抗压强度为94.2 MPa，28 d抗压强度为132.9 MPa，3 h竖向膨胀率为0.23%，24 h竖向膨胀率为0.27%。 Abstract: The effects of silica fume content, quartz sand gradation, cement sand ratio, water binder ratio, and admixture content on the workability and mechanical properties of ultra high performance grouting materials for offshore wind turbine tower were studied, and the optimal mix proportion was determined. The results show that the optimal mix proportion of grouting material is water binder ratio of 0.22, cement sand ratio of 1.0, the quartz sand grading is m2.00~0.60 mm∶ m0.60~0.28 mm∶m0.28~0.10 mm=54∶23∶23, silicon fume content of 6%, composite expansion agent content of 6%, defoamer content of 0.10%, plastic expansion agent content of 0.03%. At the optimal mix proportion, the initial flowability of the grouting material is 340 mm, the flowability at 30 min is 320 mm, the compressive strength at 1 d is 68.7 MPa, the compressive strength at 3 d is 94.2 MPa, the compressive strength at 28 d is 132.9 MPa, the vertical expansion rate at 3 h is 0.23%, and the vertical expansion rate at 24 h is 0.27%.

李庆超,李伟,吉飞,等.海上风电塔筒用超高性能灌浆料的制备及性能研究[J].混凝土与水泥制品,2024(10):12-17. LI Q C,LI W,JI F,et al.Study on preparation and performance of ultra high performance grouting materials for offshore wind turbine tower[J].China Concrete and Cement Products,2024(10):12-17.

摘   要：节段胶拼技术随着预制装配式塔筒的发展，在风电混塔领域得到了广泛应用，且负温环境的混塔拼接缝的施工性能至关重要。研究了不同环氧树脂与固化剂含量比的环氧胶黏剂在负温（-5 ℃）环境下的施工性能，并提出了环氧胶黏剂搅拌阻力、体积稳定性的评价方法。结果表明：-5 ℃负温环境下，环氧胶黏剂具有较好的无约束线性收缩率，但搅拌阻力会有所增加。 Abstract: With the development of prefabricated tower structures, segmental splicing technology has made rapid progress in the field of wind power hybrid towers. The construction performance of hybrid tower splicing joints in negative temperature environments is crucial. The construction performance of epoxy adhesives with different ratios of epoxy resin to solidification agent content was studied under negative temperature(-5 ℃) environment, and evaluation methods for mixing resistance and volume stability of epoxy adhesives were proposed. The results show that the epoxy adhesive has a good unconstrained linear shrinkage rate in a negative temperature environment of -5 ℃, but the mixing resistance will increase.

李博洋,吴香国,张明熠,等.负温环境下风电混塔拼接胶搅拌阻力、体积稳定性研究[J].混凝土与水泥制品,2024(10):18-22. LI B Y,WU X G,ZHANG M Y,et al.Research on the mixing resistance and volume stability of splicing adhesive for wind power hybrid tower at low temperature[J].China Concrete and Cement Products,2024(10):18-22.

摘   要：总结了结构拼接胶的研究现状，对比了现有相关标准对结构拼接胶的技术要求差异，研究了负温（-5 ℃）环境下4种风电混塔结构用拼接胶的抗流挂性能和可工作时间。结果表明：4种结构拼接胶在负温环境下的抗流挂性能均较好，可工作时间与流挂长度成正比关系；当环境温度高于结构拼接胶的适用温度时，会加快固化速率，缩短可工作时间，容易导致节段拼接性能有所损失甚至失效；当环境温度低于结构拼接胶的适用温度时，会减缓固化速率甚至不固化，影响施工进程，也易使节段发生硬接触而破坏；应结合风电混塔的实际施工环境条件选用合适的结构拼接胶。 Abstract: The research status of structural splicing adhesives was summarized, and the differences in technical requirements for structural splicing adhesives in existing relevant standards were compared. The anti-sagging performance and working time of four types of splicing adhesives used in wind power hybrid tower structures under negative temperature (-5 ℃) environment were studied. The results show that the anti-sagging performance of the four types of structural splicing adhesives is good in negative temperature environments, and the working time is proportional to the sagging length. When the ambient temperature is higher than the applicable temperature of structural splicing adhesive, it will accelerate the curing rate, shorten the working time, and easily lead to loss or even failure of segment splicing performance. When the ambient temperature is lower than the applicable temperature of structural splicing adhesive, it will slow down the curing rate or even not cure, affect the construction process, and easily cause hard contact and damage to the section. Suitable structural splicing adhesive should be selected based on the actual construction environment conditions of wind power hybrid towers.

李博洋,吴香国,张明熠,等.负温下风电混塔拼接胶的抗流挂性能和可工作时间研究[J].混凝土与水泥制品,2024(10):23-26,33. LI B Y,WU X G,ZHANG M Y,et al.Study on anti-sagging performance and working time of wind power hybrid tower splicing adhesive under negative temperature[J].China Concrete and Cement Products,2024(10):23-26,33.

张宇豪,吴香国,张明熠,等.横向拼接缝胶结缺陷对混塔极限状态受力特性的影响分析[J].混凝土与水泥制品,2024(10):27-33. ZHANG Y H,WU X G,ZHANG M Y,et al.Analysis of the influence of transverse joint bonding imperfections on the ultimate state loading behaviors of hybrid towers[J].China Concrete and Cement Products,2024(10):27-33.