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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    纖維水泥及制品

    短切玄武巖纖維對磷酸鎂水泥砂漿性能的影響
    短切玄武巖纖維對磷酸鎂水泥砂漿性能的影響
    • 趙鵬輝1, 黨玉棟2,3,陳治君2,3,李昕成2,3,徐 清1,劉聰興1,錢覺時4
    2021年第3期
    摘要
    引用本文
    摘 ? 要:采用固定水膠比和固定流動度兩種方案進行對比試驗,研究了不同摻量的玄武巖纖維對復合磷酸鎂水泥(MPC)砂漿流動度和力學性能的影響,并采用掃描電子顯微鏡(SEM)觀察了微觀形貌。結果表明:在固定水膠比的情況下,隨著玄武巖纖維摻量的增加,MPC砂漿的流動度降低,但力學性能有所提高,且摻量為3.5 kg/m3時,力學性能最優,超過此摻量則增幅下降;在固定流動度而水膠比隨纖維摻量增加而增大的情況下,MPC砂漿的力學性能整體呈下降趨勢;SEM結果表明,在一定摻量范圍內,玄武巖纖維在MPC砂漿中分散均勻,摻量過多則會產生纖維團聚現象;MPC砂漿與玄武巖纖維之間有一定的黏接力和摩擦力,但二者的黏結性或相容性不足;MPC砂漿的水化過程不會對玄武巖纖維造成損傷。 Abstract: The comparative tests were carried out with two schemes of fixed water-binder ratio and fixed fluidity, and the effect of different content of basalt fiber on the fluidity and mechanical properties of composite magnesium phosphate cement (MPC) mortar was studied, and the scanning electron microscope (SEM) was used to observe its microscopic appearance. The results show that under the condition of fixed water-binder ratio, the fluidity of MPC mortar decreases but its mechanical properties improve with the increase of basalt fiber content, and the mechanical properties are optimal when the content is 3.5 kg/m3, but the increase decreases when the content exceeds 3.5 kg/m3. When the fluidity is fixed and the water-binder ratio increases with the increase of fiber content, the overall mechanical properties of MPC mortar tend to decline. The SEM results show that within a certain content range, basalt fiber is evenly dispersed in MPC mortar, while over-mixing will produce fiber cluster phenomenon. MPC mortar and basalt fiber have certain adhesion and friction force, but the adhesion or compatibility is insufficient. The hydration process of MPC mortar will not cause damage to basalt fiber.
    趙鵬輝,黨玉棟,陳治君,等.短切玄武巖纖維對磷酸鎂水泥砂漿性能的影響[J].混凝土與水泥制品,2021(3):43-47. ZHAO P H,DANG Y D,CHEN Z J,et al.Effect of Chopped Basalt Fiber on the Properties of Magnesium Phosphate Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):43-47.
    耐堿玻纖改善高性能混凝土抗裂性能研究
    耐堿玻纖改善高性能混凝土抗裂性能研究
    • 王 威1,宿利平1,姜瑞雙2,3
    2021年第3期
    摘要
    引用本文
    王威,宿利平,姜瑞雙.耐堿玻纖改善高性能混凝土抗裂性能研究[J].混凝土與水泥制品,2021(3):48-51. WANG W,SU L P,JIANG R S.Study on Cracking Resistance of Glass Fiber Reinforced High Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):48-51.
    碳納米管與鋼纖維對混凝土抗壓強度與抗沖擊性能的影響
    碳納米管與鋼纖維對混凝土抗壓強度與抗沖擊性能的影響
    • 尹 鵬,孫 敏,董子碩
    2021年第3期
    摘要
    引用本文
    摘 ? 要:研究了碳納米管、鋼纖維、碳納米管+鋼纖維對混凝土抗壓強度和抗沖擊性能的影響。結果表明:摻入碳納米管和鋼纖維均能提高混凝土的抗壓強度;單摻鋼纖維較單摻碳納米管對混凝土抗沖擊性能的提升效果更大;混摻碳納米管與鋼纖維混凝土的韌性和延性較單摻鋼纖維混凝土得到再次提升;復摻1%鋼纖維+0.30%碳納米管對混凝土性能的增強效果最顯著。 Abstract: The effects of carbon nanotubes, steel fibers, carbon nanotubes + steel fibers on the compressive strength and impact resistance of concrete were studied. The results show that the addition of carbon nanotubes and steel fibers can improve the compressive strength of concrete. Single-doped steel fiber has a greater effect on the impact resistance of concrete than that of single-doped carbon nanotubes. The toughness and ductility of concrete mixed with carbon nanotubes and steel fiber are improved compared with single-doped steel fiber concrete. Adding 1% steel fiber + 0.30% carbon nanotubes has the best reinforcement effect on concrete performance.
    尹鵬,孫敏,董子碩.碳納米管與鋼纖維對混凝土抗壓強度與抗沖擊性能的影響[J].混凝土與水泥制品,2021(3):52-55. YIN P,SUN M,DONG Z S.Influence of Carbon Nanotubes and Steel Fibers on the Compressive Strength and Impact Resistance of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):52-55.
    PVA纖維天然浮石混凝土動態力學性能研究
    PVA纖維天然浮石混凝土動態力學性能研究
    • 霍俊芳1,2,奇雨欣1,王蕭蕭1,2,曹 雪1,李海青1
    2021年第3期
    摘要
    引用本文
    摘 ? 要:以內蒙古地區的天然浮石為粗骨料配制天然浮石混凝土,采用?覫100分離式霍普金森壓桿(SHPB)試驗分析了不同聚乙烯醇(PVA)纖維體積摻量(0、0.15%、0.30%)天然浮石混凝土在沖擊荷載下的動態力學性能。結果表明:隨著PVA纖維摻量的增加,天然浮石混凝土的靜態抗壓強度增強,動態沖擊壓縮下破壞程度減弱;當應變率低于96 s-1時,0.30% PVA纖維天然浮石混凝土的動態抗壓強度最佳;當應變率高于127 s-1時,0.30%PVA纖維天然浮石混凝土吸收的能量最多,相比于未摻纖維的天然浮石混凝土提高了11.0%。 Abstract: Natural pumice concrete was prepared from natural pumice stone as coarse aggregate from Inner Mongolia, The dynamic mechanical properties of natural pumice concrete with different PVA fiber volume contents (0, 0.15%, 0.30%) under impact loads were analyzed by using ?覫100 split hopkinson pressure bar(SHPB). The results show that with the increases of PVA fiber content, the static compressive strength increases, and the damage degree of the natural pumice concrete decreases. When the strain rate is lower than 96 s-1, 0.30%PVA fiber natural pumice concrete has the best dynamic compressive strength. When the strain rate is higher than 127 s-1, 0.30%PVA fiber natural pumice concrete absorbs the most energy, which is 11.0% higher than that of the natural pumice concrete without fiber.
    霍俊芳,奇雨欣,王蕭蕭,等.PVA纖維天然浮石混凝土動態力學性能研究[J].混凝土與水泥制品,2021(3):56-61. HUO J F,QI Y X,WANG X X,et al.Study of Dynamic Mechanical Properties of PVA Fiber Natural Pumice Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):56-61.
    PVA纖維對水泥膠砂抗侵蝕性能的影響
    PVA纖維對水泥膠砂抗侵蝕性能的影響
    • 趙 楊,孫海燕,龔愛民,王福來,陳 晨,梅 偉
    2021年第3期
    摘要
    引用本文
    摘 ? 要:研究了不同摻量PVA纖維水泥膠砂經濃度為10 000 mg/L和30 000 mg/L的硫酸鈉溶液侵蝕后的抗壓強度和抗折強度變化規律,并以抗折抗蝕系數為指標評價了堿環境下PVA纖維對水泥膠砂抗侵蝕性能的影響。結果表明:隨PVA纖維體積摻量的增加,水泥膠砂拌和物的流動度逐漸減??;經硫酸鈉溶液侵蝕后,各組試件的力學性能和抗折抗蝕系數均有不同程度降低,高濃度和長侵蝕齡期對水泥膠砂的抗侵蝕性能影響較顯著;對比基準組,摻入PVA纖維可有效提高水泥膠砂的力學性能和抗折抗蝕系數,且PVA纖維體積摻量為0.2%時效果最好。 Abstract: The changes of compressive strength and flexural strength of different amounts of PVA fiber cement mortar after being eroded by sodium sulfate solutions with concentrations of 10 000 mg/L and 30 000 mg/L were studied, and the flexural resistance coefficient was taken as an indicator to evaluate the influence of PVA fiber on the corrosion resistance of cement mortar under alkaline environment. The results show that the fluidity of cement mortar mixture decreases gradually with increasing PVA fiber volume dosages. The mechanical properties and flexural resistance coefficient of the specimen are reduced to different degrees after being eroded by sodium sulfate solution. High concentration and long erosion age have a significant impact on the flexural resistance coefficient of cement mortar. Compared with the reference group, the addition of PVA fiber can effectively improve the mechanical properties and flexural resistance coefficient of cement mortar, and the optimal volume dosage of PVA fiber is 0.2%.
    趙楊,孫海燕,龔愛民,等.PVA纖維對水泥膠砂抗侵蝕性能的影響[J].混凝土與水泥制品,2021(3):62-65. ZHAO Y,SUN H Y,GONG A M,et al.Effect of PVA Fiber on the Erosion Resistance of Cement Mortar[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):62-65.
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