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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

    高溫后玄武巖纖維混凝土力學性能試驗研究
    高溫后玄武巖纖維混凝土力學性能試驗研究
    • 李 曈1,張曉東1,劉華新1,陳 明2,范錦澤1,陳 晨1
    2020年第10期
    摘要
    引用本文
    摘 ? 要:研究了高溫作用下素混凝土、玄武巖纖維混凝土、玄武巖-高吸水樹脂混凝土及玄武巖-纖維素混雜纖維混凝土的力學性能,建立了高溫作用后混凝土的抗壓強度預測模型。結果表明:纖維的摻入能夠提高混凝土的耐高溫性能;對于抗壓強度,玄武巖-纖維素混雜纖維混凝土的抗壓強度值最高,400 ℃時,其抗壓強度相較素混凝土提高了36.3%;對于抗折強度,玄武巖和高吸水樹脂混摻對混凝土抗折強度的提升效果最優;建立的高溫作用下混凝土抗壓強度預測模型的精度較高。 Abstract: The mechanical properties of plain concrete, basalt fiber concrete, basalt-superabsorbent resin concrete and basalt-cellulose hybrid fiber concrete after high temperature were studied, and the prediction models of compressive strength of concrete after high temperature were established. The results show that the addition of fiber can effectively improve the high temperature resistance of concrete. For compressive strength, the basalt-cellulose hybrid fiber concrete has the highest compressive strength, and at 400 ℃, its compressive strength is 36.3% higher than that of plain concrete. For flexural strength, the mixing of basalt and superabsorbent resin has the best effect on the improvement of the flexural strength of concrete. The established prediction models of compressive strength of concrete under high temperature have high accuracy.
    李曈,張曉東,劉華新,等.高溫后玄武巖纖維混凝土力學性能試驗研究[J].混凝土與水泥制品,2020(10):61-64. LI T,ZHANG X D,LIU H X,et al.Experimental Study on Mechanical Properties of Basalt Fiber Concrete After High Temperature[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):61-64.
    RPC本構關系及矩形RPC梁抗彎承載力研究
    RPC本構關系及矩形RPC梁抗彎承載力研究
    • 龍佩恒,黃琳藝,喬 宏,宋 浩,李 飛
    2020年第10期
    摘要
    引用本文
    摘 ? 要:設計了3組不同配比活性粉末混凝土(RPC)試件,研究了鋼纖維對RPC試件力學性能的影響,分析了RPC抗壓本構關系,并提出了新的RPC抗拉本構方程。在此基礎上設計了矩形梁抗彎承載力試驗,研究了鋼纖維對RPC梁的延性、韌性、承載力和抗裂性能的影響。結果表明:摻鋼纖維RPC梁的開裂荷載、屈服荷載及極限承載力較未摻鋼纖維RPC梁均提升了20%以上,構件的裂縫寬度能夠控制在0.1 mm以內。 Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.
    龍佩恒,黃琳藝,喬宏,等.RPC本構關系及矩形RPC梁抗彎承載力研究[J].混凝土與水泥制品,2020(10):55-60. LONG P H,HUANG L Y,QIAO H,et al.RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):55-60.
    超高強鋼筋ECC柱軸心受壓試驗研究
    超高強鋼筋ECC柱軸心受壓試驗研究
    • 汪知文1,李碧雄1,游 楊1,廖 橋1,饒 丹2,余 弦2
    2020年第10期
    摘要
    引用本文
    摘 ? 要:對超高強鋼筋HRB500與高延性水泥基復合材料(ECC)矩形截面短柱進行了軸心受壓試驗,研究了配筋率為1.13%、2.26%的超高強鋼筋對ECC應力-應變曲線的影響。結果表明:ECC柱在破壞后依然能保持良好的整體性,且裂縫寬度明顯低于普通混凝土柱;超高強鋼筋ECC柱的縱向鋼筋均達到屈服強度,極限承載力和極限豎向應變均大于普通混凝土試件;超高強鋼筋與ECC混凝土之間的協同性明顯優于普通混凝土;ECC柱的泊松比隨著加載的進行先逐漸變小,然后有一定程度的增加。 Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.
    汪知文,李碧雄,游楊,等.超高強鋼筋ECC柱軸心受壓試驗研究[J].混凝土與水泥制品,2020(10):51-54. WANG Z W,LI B X,YOU Y,et al.Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):51-54.
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