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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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    新拌UHPC凈漿的工作性與流變性試驗研究
    Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC
    2022年第1期
    水膜層厚度;正交試驗;UHPC;工作性;流變性;配合比
    Water film thickness; Orthogonality test; UHPC; Workability; Rheological property; Mix proporition
    2022年第1期
    10.19761/j.1000-4637.2022.01.001.06
    國家自然科學基金項目(51878381)。
    黃 靜1,季文玉1,閻培渝2
    1.北京交通大學 土木建筑工程學院,北京 100044;2.清華大學 土木工程系,北京 100084

    黃 靜1,季文玉1,閻培渝2

    黃靜,季文玉,閻培渝.新拌UHPC 凈漿的工作性與流變性試驗研究[J].混凝土與水泥制品,2022(1):1-6.

    HUANG J,JI W Y,YAN P Y.Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC[J].China Concrete and Cement Products,2022(1):1-6.

    瀏覽量:
    1000
    摘 ? 要:通過正交試驗研究了水膠比、超細粉煤灰摻量和硅灰摻量對新拌UHPC凈漿的工作性與流變性的影響,選取流動度、黏度系數和水膜層厚度為工作性與流變性的衡量指標,利用綜合平衡法獲得了最優配合比。試驗結果表明:水膠比、超細粉煤灰摻量和硅灰摻量的提高都會造成UHPC凈漿的流動度和顆粒表面水膜層厚度增大,黏度系數減??;超細粉煤灰摻量是凈漿工作性和流變性的主要影響因素,水膠比次之,硅灰摻量的影響最??;UHPC最優配合比:水膠比為0.2,超細粉煤灰摻量為40%,硅灰摻量為8%;以該配合比的成型的UHPC 28 d抗壓強度為128.8 MPa,抗拉強度為20.3 MPa,同時滿足工作性和力學性能要求,且經濟合理。 Abstract: An orthogonality test was carried out for study on the effect of W/C ratio, the superfine fly ash and silica fume content on workability and rheological properties of fresh paste of UHPC, and flow spread, consistency coefficient and water film thickness on particles were taken as the measures of workability and rheological properties. The comprehensive balance method was used to obtain the optimal mix proportion of UHPC. The results show that the increase of W/C ratio, the superfine fly ash and silica fume content of UHPC enhances its water film thickness on particles and flowability, reduces its coefficient of viscosity. The superfine fly ash content is the main factor that affects the workability and rheological properties of UHPC, followed by W/C ratio and silica fume content. The optimal mix proporition of UHPC of the W/C is 0.2, superfine fly ash content of 40% and silica fume content of 8%. The 28 d compressive strength of the UHPC is 128.8 MPa and its flexurary strength is 20.3 MPa. It shows a satisfied workability and mechanical properties, as well as a reasonable economy.
    英文名 : Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC
    刊期 : 2022年第1期
    關鍵詞 : 水膜層厚度;正交試驗;UHPC;工作性;流變性;配合比
    Key words : Water film thickness; Orthogonality test; UHPC; Workability; Rheological property; Mix proporition
    刊期 : 2022年第1期
    DOI : 10.19761/j.1000-4637.2022.01.001.06
    文章編號 :
    基金項目 : 國家自然科學基金項目(51878381)。
    作者 : 黃 靜1,季文玉1,閻培渝2
    單位 : 1.北京交通大學 土木建筑工程學院,北京 100044;2.清華大學 土木工程系,北京 100084

    黃 靜1,季文玉1,閻培渝2

    黃靜,季文玉,閻培渝.新拌UHPC 凈漿的工作性與流變性試驗研究[J].混凝土與水泥制品,2022(1):1-6.

    HUANG J,JI W Y,YAN P Y.Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC[J].China Concrete and Cement Products,2022(1):1-6.

    摘要
    參數
    結論
    參考文獻
    引用本文

    摘   要:通過正交試驗研究了水膠比、超細粉煤灰摻量和硅灰摻量對新拌UHPC凈漿的工作性與流變性的影響,選取流動度、黏度系數和水膜層厚度為工作性與流變性的衡量指標,利用綜合平衡法獲得了最優配合比。試驗結果表明:水膠比、超細粉煤灰摻量和硅灰摻量的提高都會造成UHPC凈漿的流動度和顆粒表面水膜層厚度增大,黏度系數減??;超細粉煤灰摻量是凈漿工作性和流變性的主要影響因素,水膠比次之,硅灰摻量的影響最??;UHPC最優配合比:水膠比為0.2,超細粉煤灰摻量為40%,硅灰摻量為8%;以該配合比的成型的UHPC 28 d抗壓強度為128.8 MPa,抗拉強度為20.3 MPa,同時滿足工作性和力學性能要求,且經濟合理。

    Abstract: An orthogonality test was carried out for study on the effect of W/C ratio, the superfine fly ash and silica fume content on workability and rheological properties of fresh paste of UHPC, and flow spread, consistency coefficient and water film thickness on particles were taken as the measures of workability and rheological properties. The comprehensive balance method was used to obtain the optimal mix proportion of UHPC. The results show that the increase of W/C ratio, the superfine fly ash and silica fume content of UHPC enhances its water film thickness on particles and flowability, reduces its coefficient of viscosity. The superfine fly ash content is the main factor that affects the workability and rheological properties of UHPC, followed by W/C ratio and silica fume content. The optimal mix proporition of UHPC of the W/C is 0.2, superfine fly ash content of 40% and silica fume content of 8%. The 28 d compressive strength of the UHPC is 128.8 MPa and its flexurary strength is 20.3 MPa. It shows a satisfied workability and mechanical properties, as well as a reasonable economy.

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    (1)水膠比、超細粉煤灰摻量和硅灰摻量提高都造成UHPC凈漿的流動度和顆粒表面水膜層厚度增大,黏度系數減小。超細粉煤灰摻量是UHPC凈漿的工作性和流變性的主要影響因素,水膠比次之,硅灰摻量的影響程度最小。
    (2)UHPC最優配合比為:水膠比為0.20,超細粉煤灰摻量為40%,硅灰摻量為8%。采用該凈漿配合比成型的UHPC砂漿試件的28 d抗壓強度為128.8 MPa,抗拉強度為20.3 MPa,同時滿足工作性和力學性能要求,且經濟合理。

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    黃靜,季文玉,閻培渝.新拌UHPC 凈漿的工作性與流變性試驗研究[J].混凝土與水泥制品,2022(1):1-6.

    HUANG J,JI W Y,YAN P Y.Experimental Study on Workability and Rheological Properties of Fresh Paste of UHPC[J].China Concrete and Cement Products,2022(1):1-6.

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