纤维水泥及制品_2022_《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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纤维水泥及制品

分散剂对碳纤维水泥砂浆力学性能及压敏性的影响研究

金春福1，阎石2，张世洋2,3

2022年第3期

摘要

引用本文

摘要：研究了分散剂的种类（HPMC、MC、HEC）和掺量（0、0.2%、0.4%）对碳纤维水泥砂浆（CFRM）力学性能和压敏性的影响。结果表明：当分散剂掺量为0.2%时，掺HPMC和MC的CFRM试件抗压、抗折强度均高于基准组，其中，HPMC对力学性能的提升效果最好；各组试件的电阻变化率均随着应力的增大而减小，其中，HPMC掺量为0.2%的试件灵敏度最高。综合考虑，采用0.2%的HPMC时，CFRM的力学性能和压敏性达到最佳。 Abstract: The effects of the types (HPMC, MC, HEC) and content (0, 0.2%, 0.4%) of dispersants on the mechanical properties and pressure sensitivity of carbon fiber cement mortar (CFRM) were studied. The results show that when the content of dispersant is 0.2%, the compressive and flexural strength of CFRM mixed with HPMC and MC are higher than those of the reference group, and HPMC has the best effect on improving the mechanical properties of CFRM. The resistance change rate of the specimens decreases with the increase of stress, and the sensitivity of the specimens with HPMC content of 0.2% is the highest. Considering comprehensively, when 0.2% HPMC is used, the mechanical properties and pressure sensitivity of CFRM are the best.

金春福,阎石,张世洋.分散剂对碳纤维水泥砂浆力学性能及压敏性的影响研究[J].混凝土与水泥制品,2022(3):66-70. JIN C F,YAN S,ZHANG S Y.Effect of Dispersant on Mechanical Properties and Pressure Sensitivity of Carbon Fiber Reinforced Cement Mortar[J].China Concrete and Cement Products,2022(3):66-70.

混杂纤维活性粉末混凝土与普通混凝土界面黏结性能研究

王欣1,2，吴楠1，刘国安1，陈国斌3，张国强3，岳庆霞1

2022年第3期

摘要

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摘要：通过劈裂抗拉强度试验研究了普通混凝土（NC）强度等级和界面处理方式对混杂纤维活性粉末混凝土（HFRPC）与NC界面黏结性能的影响。结果表明：与凿毛、露骨料、切槽界面处理方式相比，植筋HFRPC-NC试件的劈裂抗拉强度最高，为NC试件破坏强度的1.15~1.22倍，且破坏模式为延性破坏；对于界面粗糙度不同的凿毛、露骨料、切槽三种界面处理方式，HFRPC-NC试件的劈裂抗拉强度可达NC试件破坏强度的70%~92%，且劈裂抗拉强度随界面粗糙度的增大而增大；HFRPC-NC试件的劈裂抗拉强度随NC强度等级的提高而增大。 Abstract: Through the splitting tensile strength tests, the effects of strength grade of ordinary concrete(NC) and interface treatment methods on the interface bonding performance of hybrid fiber reactive powder concrete (HFRPC) and NC were studied. The results show that compared with the interface treatment methods of roughing, exposing aggregated and cutting groove, the splitting tensile strength of planting reinforcement HFRPC-NC specimen is the highest, which is 1.15~1.22 times the failure strength of NC specimen, and the failure mode is ductile failure. For the three interface treatment methods of roughing, exposing aggregated and cutting groove with different roughness, the splitting tensile strength of HFRPC-NC specimen can reach 70%~92% of the failure strength of NC specimen, and the splitting tensile strength increases with the increase of the interface roughness. The splitting tensile strength of HFRPC-NC specimens increases with the increase of NC strength grade.

王欣,吴楠,刘国安,等.混杂纤维活性粉末混凝土与普通混凝土界面黏结性能研究[J].混凝土与水泥制品,2022(3):61-65. WANG Xin, WU Nan, LIU Guo-an,et al.Study on the Interfacial Bonding Performance of Hybrid Fiber Reactive Powder Concrete and Ordinary Concrete[J].China Concrete and Cement Products,2022(3):61-65.

玄武岩纤维高性能混凝土轴拉和抗冲击韧性试验研究

于跟社1,2，邓宗才3，王珏2，王亚楠2

2022年第3期

摘要

引用本文

摘要：研究了玄武岩纤维掺量对混凝土轴拉性能和抗冲击韧性的影响，观察了试件拉伸与冲击的破坏形态，测得了试件的轴拉强度、破坏冲击次数等指标。结果表明：随着玄武岩纤维掺量的增加，混凝土的轴拉强度先增大后减少；当玄武岩纤维掺量为5 kg/m3和10 kg/m3时，试件的轴拉强度相比素混凝土的轴拉强度分别提高了24.41%和50.17%；当玄武岩纤维掺量为15 kg/m3时，试件的轴拉强度相比素混凝土的轴拉强度降低了3.73%；各试件的冲击破坏裂缝均出现在试件中部；与素混凝土相比，玄武岩纤维掺量为5 kg/m3和10 kg/m3试件的破坏冲击次数分别增加了46.29%和69.66%，抗冲击韧性的改善效果明显；当玄武岩纤维掺量为15 kg/m3时，由于纤维分散不够均匀，导致试件的破坏冲击次数降低。 Abstract: The effects of basalt fiber content on the axial tensile properties and impact toughness of concrete were studied. The failure modes of tensile and impact of the specimens were observed, and the tensile strength and failure impact times of the specimens were measured. The results show that the tensile strength of concrete increases first and then decreases with the increase of basalt fiber content. When the content of basalt fiber is 5 kg/m3 and 10 kg/m3, the tensile strength of specimens is increased by 24.41% and 50.17% respectively compared with that of plain concrete. When the content of basalt fiber is 15 kg/m3, the tensile strength of the specimen is 3.73% lower than that of plain concrete. The impact failure cracks of each specimen appear in the middle of the specimen. Compared with plain concrete, the failure impact times of specimens with basalt fiber content of 5 kg/m3 and 10 kg/m3 are increased by 46.29% and 69.66% respectively, and the improvement effect of impact toughness is obvious. When the content of basalt fiber is 15 kg/m3, the failure impact times of the specimen are reduced due to the uneven dispersion of the fiber.

于跟社,邓宗才,王珏,等.玄武岩纤维高性能混凝土轴拉和抗冲击韧性试验研究[J].混凝土与水泥制品,2022(3):56-60. YU Gen-she, DENG Zong-cai, WANG Jue,et al.Experiment Study on Axial Tensile and Impact Toughness of Basalt Fiber Reinforced High Performance Concrete[J].China Concrete and Cement Products,2022(3):56-60.

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