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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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    含粗骨料超高性能混凝土的制備及其性能研究
    Study on the Preparation and Properties of Ultra High Performance Concrete with Coarse Aggregate
    2019年第11期
    超高性能混凝土;粗骨料;力學性能;工作性
    Utra high performance concrete; Coarse aggregate; Mechanical property; Working performance
    2019年第11期
    10.19761/j.1000-4637.2019.11.006.03
    國家自然科學基金資助項目(51772227)。
    李 信1,2,陳露一1,2,黃有強1,2,張志豪1,2,譚洪波3
    1.中鐵大橋局科學研究院有限公司,武漢 430034;2.橋梁結構健康與安全 國家重點實驗室,武漢 430034;3.武漢理工大學,430070

    李 信1,2,陳露一1,2,黃有強1,2,張志豪1,2,譚洪波3

    李信,陳露一,黃有強,等.含粗骨料超高性能混凝土的制備及其性能研究[J].混凝土與水泥制品,2019(11):6-8.

    LI X,CHEN L Y,HUANG Y Q,et al.Study on the Preparation and Properties of Ultra High Performance Concrete with Coarse Aggregate[J].China Concrete and Cement Products,2019(11):6-8.

    瀏覽量:
    1000
    摘 要:針對超高性能混凝土(UHPC)膠凝材料用量大、非綠色化、成本高、自收縮大等問題,通過引入5~10 mm粒徑的粗骨料,采用普通河砂代替石英砂,并優化鋼纖維體積摻量,成功制備出了經濟環境效益良好、性能優良的含粗骨料超高性能混凝土(UHPC-CA)。研究了粗骨料摻量對UHPC-CA工作性和力學性能的影響,并與UHPC性能進行了對比分析。結果表明,UHPC-CA的流動性能相比UHPC有所降低,粗骨料摻量為675 kg/m3的UHPC-CA能保持良好流動性能,但隨著粗骨料摻量的增加,流動性降低的十分明顯;UHPC-CA抗壓強度、抗折強度低于UHPC,彈性模量則高于UHPC,不同粗骨料摻量UHPC-CA力學性能變化并不明顯;UHPC-CA抗氯離子滲透性能和抗凍性能表現良好,但是不如UHPC優異;摻入粗骨料能夠改善UHPC-CA的自收縮性能,相比UHPC,其早期自收縮率明顯降低。 Abstract: Regarding to the problem that the ultra high performance concrete(UHPC) needs a large amount of cementing material, non-greening, high cost and has a high self-shrinkage, the ultra high performance concrete with coarse aggregate(UHPC-CA) with good economical and environmental performance and excellent performance was successfully prepared with coarse aggregate of 5~10 mm particle size, ordinary river sand and optimized amount of steel fiber. The effect of coarse aggregate content on the working performance and mechanical properties of UHPC-CA was studied, and all the performance of UHPC-CA while compared with UHPC were analyzed. The results show that the flow performance of UHPC-CA is lower than that of UHPC and with the increase of coarse aggregate content from 675 kg/m3 to 825 kg/m3, the fluidity is obviously reduced. The compressive strength and anti-folding strength of UHPC-CA are lower than UHPC, however, the elastic modulus is higher than that of UHPC. The change of the mechanical properties of UHPC-CA with different coarse aggregates content is not obvious. UHPC-CA has good performance against chloride ion permeation and good antifreeze performance, but both not as good as that of UHPC. The coarse aggregate can improve the self-shrinkage performance of UHPC-CA and its early self-shrinkage rate is significantly lower than that of UHPC. Key words: Utra high performance concrete; Coarse aggregate; Mechanical property; Working performance
    英文名 : Study on the Preparation and Properties of Ultra High Performance Concrete with Coarse Aggregate
    刊期 : 2019年第11期
    關鍵詞 : 超高性能混凝土;粗骨料;力學性能;工作性
    Key words : Utra high performance concrete; Coarse aggregate; Mechanical property; Working performance
    刊期 : 2019年第11期
    DOI : 10.19761/j.1000-4637.2019.11.006.03
    文章編號 :
    基金項目 : 國家自然科學基金資助項目(51772227)。
    作者 : 李 信1,2,陳露一1,2,黃有強1,2,張志豪1,2,譚洪波3
    單位 : 1.中鐵大橋局科學研究院有限公司,武漢 430034;2.橋梁結構健康與安全 國家重點實驗室,武漢 430034;3.武漢理工大學,430070

    李 信1,2,陳露一1,2,黃有強1,2,張志豪1,2,譚洪波3

    李信,陳露一,黃有強,等.含粗骨料超高性能混凝土的制備及其性能研究[J].混凝土與水泥制品,2019(11):6-8.

    LI X,CHEN L Y,HUANG Y Q,et al.Study on the Preparation and Properties of Ultra High Performance Concrete with Coarse Aggregate[J].China Concrete and Cement Products,2019(11):6-8.

    摘要
    參數
    結論
    參考文獻
    引用本文

    摘  要:針對超高性能混凝土(UHPC)膠凝材料用量大、非綠色化、成本高、自收縮大等問題,通過引入5~10 mm粒徑的粗骨料,采用普通河砂代替石英砂,并優化鋼纖維體積摻量,成功制備出了經濟環境效益良好、性能優良的含粗骨料超高性能混凝土(UHPC-CA)。研究了粗骨料摻量對UHPC-CA工作性和力學性能的影響,并與UHPC性能進行了對比分析。結果表明,UHPC-CA的流動性能相比UHPC有所降低,粗骨料摻量為675 kg/m3的UHPC-CA能保持良好流動性能,但隨著粗骨料摻量的增加,流動性降低的十分明顯;UHPC-CA抗壓強度、抗折強度低于UHPC,彈性模量則高于UHPC,不同粗骨料摻量UHPC-CA力學性能變化并不明顯;UHPC-CA抗氯離子滲透性能和抗凍性能表現良好,但是不如UHPC優異;摻入粗骨料能夠改善UHPC-CA的自收縮性能,相比UHPC,其早期自收縮率明顯降低。
    Abstract: Regarding to the problem that the ultra high performance concrete(UHPC) needs a large amount of cementing material, non-greening, high cost and has a high self-shrinkage, the ultra high performance concrete with coarse aggregate(UHPC-CA) with good economical and environmental performance and excellent performance was successfully prepared with coarse aggregate of 5
    10 mm particle size, ordinary river sand and optimized amount of steel fiber. The effect of coarse aggregate content on the working performance and mechanical properties of UHPC-CA was studied, and all the performance of UHPC-CA while compared with UHPC were analyzed. The results show that the flow performance of UHPC-CA is lower than that of UHPC and with the increase of coarse aggregate content from 675 kg/m3 to 825 kg/m3, the fluidity is obviously reduced. The compressive strength and anti-folding strength of UHPC-CA are lower than UHPC, however, the elastic modulus is higher than that of UHPC. The change of the mechanical properties of UHPC-CA with different coarse aggregates content is not obvious. UHPC-CA has good performance against chloride ion permeation and good antifreeze performance, but both not as good as that of UHPC. The coarse aggregate can improve the self-shrinkage performance of UHPC-CA and its early self-shrinkage rate is significantly lower than that of UHPC.

    關鍵詞:
    超高性能混凝土;粗骨料;力學性能;工作性
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    (1)摻粗骨料使UHPC-CA流動性降低,且隨著粗骨料摻量的增加,降低幅度增大,摻675 kg/m3粗骨料的UHPC-CA流動性良好,而摻750 kg/m3及825 kg/m3 粗骨料的UHPC-CA流動性不良。
    (2)UHPC-CA抗壓強度、抗折強度相比UHPC有所降低,彈性模量則有所提高,不同粗骨料摻量UHPC-CA力學性能變化不明顯。
    (3) UHPC-CA抗氯離子滲透性能和抗凍性能表現良好,但不如UHPC優異。
    (4)摻入粗骨料能夠改善UHPC-CA的自收縮性能,相比UHPC,其早期自收縮率明顯降低。

    [1]石秋君.碎石活性粉末混凝土抗壓力學性能試驗研究[D].北京:北京交通大學,2010.
    [2] 李伯勛.低成本環保型超高性能混凝土的配制研究[D].長沙:湖南大學,2009.
    [3] 馬萬,趙鐵軍,王鵬剛,等.活性粉末混凝土制備試驗研究[J].混凝土與水泥制品,2013(9):22-25.
    [4] 張榮華,徐迅,劉應虎,等.基于力學性能的活性粉末混凝土配合比設計[J].混凝土與水泥制品,2017(8):15-19.
    [5] 李仕根.含粗骨料超高性能混凝土力學性能研究[D].長沙:湖南大學,2017.
    [6] 黃政宇,李仕根.含粗骨料超高性能混凝土力學性能研究[J].湖南大學學報:自然科學版,2018,45(3):47-54.
    [7] 丁沙,張國志,游新鵬,等.經濟型UHPC的制備及性能研究[J].混凝土,2016(2):131-133.
    [8] 程俊,劉加平,劉建忠,等.含粗骨料超高性能混凝土力學性能研究及機理分析[J].材料導報,2017,31(23):115-119+131.
    [9] 楊鳳玲,嵇銀行,劉偉,等.含粗骨料超高性能混凝土的試驗研究[J].混凝土,2018(12):110-113.
    [10] 張云升,張國榮,李司晨.超高性能水泥基復合材料早期自收縮特性研究[J].建筑材料學報,2014,17(1):19-23.

     

    李信,陳露一,黃有強,.含粗骨料超高性能混凝土的制備及其性能研究[J].混凝土與水泥制品,2019(11):6-8.

    LI X,CHEN L Y,HUANG Y Q,et al.Study on the Preparation and Properties of Ultra High Performance Concrete with Coarse Aggregate[J].China Concrete and Cement Products,2019(11):6-8.

     

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