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    蘇州混凝土水泥制品研究院有限公司

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    纖維水泥及制品

    分散劑對碳纖維水泥砂漿力學性能及壓敏性的影響研究
    分散劑對碳纖維水泥砂漿力學性能及壓敏性的影響研究
    • 金春福1,閻 石2,張世洋2,3
    2022年第3期
    摘要
    引用本文
    摘 ? 要:研究了分散劑的種類(HPMC、MC、HEC)和摻量(0、0.2%、0.4%)對碳纖維水泥砂漿(CFRM)力學性能和壓敏性的影響。結果表明:當分散劑摻量為0.2%時,摻HPMC和MC的CFRM試件抗壓、抗折強度均高于基準組,其中,HPMC對力學性能的提升效果最好;各組試件的電阻變化率均隨著應力的增大而減小,其中,HPMC摻量為0.2%的試件靈敏度最高。綜合考慮,采用0.2%的HPMC時,CFRM的力學性能和壓敏性達到最佳。 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,閻石,張世洋.分散劑對碳纖維水泥砂漿力學性能及壓敏性的影響研究[J].混凝土與水泥制品,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.
    混雜纖維活性粉末混凝土與普通混凝土界面黏結性能研究
    混雜纖維活性粉末混凝土與普通混凝土界面黏結性能研究
    • 王 欣1,2,吳 楠1,劉國安1,陳國斌3,張國強3,岳慶霞1
    2022年第3期
    摘要
    引用本文
    摘 ? 要:通過劈裂抗拉強度試驗研究了普通混凝土(NC)強度等級和界面處理方式對混雜纖維活性粉末混凝土(HFRPC)與NC界面黏結性能的影響。結果表明:與鑿毛、露骨料、切槽界面處理方式相比,植筋HFRPC-NC試件的劈裂抗拉強度最高,為NC試件破壞強度的1.15~1.22倍,且破壞模式為延性破壞;對于界面粗糙度不同的鑿毛、露骨料、切槽三種界面處理方式,HFRPC-NC試件的劈裂抗拉強度可達NC試件破壞強度的70%~92%,且劈裂抗拉強度隨界面粗糙度的增大而增大;HFRPC-NC試件的劈裂抗拉強度隨NC強度等級的提高而增大。 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,吳楠,劉國安,等.混雜纖維活性粉末混凝土與普通混凝土界面黏結性能研究[J].混凝土與水泥制品,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.
    玄武巖纖維高性能混凝土軸拉和抗沖擊韌性試驗研究
    玄武巖纖維高性能混凝土軸拉和抗沖擊韌性試驗研究
    • 于跟社1,2,鄧宗才3,王 玨2,王亞楠2
    2022年第3期
    摘要
    引用本文
    摘 ? 要:研究了玄武巖纖維摻量對混凝土軸拉性能和抗沖擊韌性的影響,觀察了試件拉伸與沖擊的破壞形態,測得了試件的軸拉強度、破壞沖擊次數等指標。結果表明:隨著玄武巖纖維摻量的增加,混凝土的軸拉強度先增大后減少;當玄武巖纖維摻量為5 kg/m3和10 kg/m3時,試件的軸拉強度相比素混凝土的軸拉強度分別提高了24.41%和50.17%;當玄武巖纖維摻量為15 kg/m3時,試件的軸拉強度相比素混凝土的軸拉強度降低了3.73%;各試件的沖擊破壞裂縫均出現在試件中部;與素混凝土相比,玄武巖纖維摻量為5 kg/m3和10 kg/m3試件的破壞沖擊次數分別增加了46.29%和69.66%,抗沖擊韌性的改善效果明顯;當玄武巖纖維摻量為15 kg/m3時,由于纖維分散不夠均勻,導致試件的破壞沖擊次數降低。 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,鄧宗才,王玨,等.玄武巖纖維高性能混凝土軸拉和抗沖擊韌性試驗研究[J].混凝土與水泥制品,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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