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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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    低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究
    Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment
    2022年第1期
    石灰巖機制砂;石粉;硫酸鹽侵蝕;低溫;碳硫硅鈣石
    Limestone manufactured sand; Rock fine; Sulfate attack; Low temperature; Thaumasite
    2022年第1期
    10.19761/j.1000-4637.2022.01.022.05
    江西省交通運輸廳科技計劃項目(2020H0002)。
    鄧俊雙1,徐志華1,李北星2,李 龍2
    1.江西省交通工程集團有限公司,江西 南昌330000;2.武漢理工大學 硅酸鹽建筑材料國家重點實驗室,湖北 武漢430070

    鄧俊雙1,徐志華1,李北星2,李 龍2

    鄧俊雙,徐志華,李北星,等.低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究[J].混凝土與水泥制品,2022(1):22-26.

    DENG J S,XU Z H,LI B X,et al.Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment[J].China Concrete and Cement Products,2022(1):2022(1):22-26.

    瀏覽量:
    1000
    摘 ? 要:為研究低溫環境下石灰巖機制砂及石粉對混凝土抗硫酸鹽侵蝕性能的影響,以摻/未摻石灰巖石粉的機制砂砂漿、摻/未摻石灰巖石粉的天然砂砂漿為模擬對象,結合硫酸鹽腐蝕介質及低溫環境特點,采用溫度(5±1)℃的5%的MgSO4溶液模擬服役環境,對比研究了不同腐蝕齡期(0 d、60 d、90 d、210 d、270 d、360 d)試件的外觀和強度變化,并基于XRD、FTIR測試分析了侵蝕產物。結果表明:隨著齡期的增長,侵蝕方式由傳統的鈣礬石型硫酸鹽侵蝕逐漸過渡到以碳硫硅酸鈣為侵蝕產物的TSA巖侵蝕;石灰巖機制砂和石粉均能促使砂漿產生TSA侵蝕,且石粉的影響更加明顯。 Abstract: In order to study the influence of limestone manufactured sand and limestone rock fines on the sulfate resistance of concrete under low temperature environment, the two kinds of manufactured sand mortars mixed with or without limestone rock fines, and the two kinds of natural sand mortars incorporated with or without limestone rock fines were used as the simulate objects. Combined with the characteristics of sulfate corrosion medium and low temperature environment, 5% magnesium sulfate solution at (5±1)℃ was used to simulate the service environment. The changes of appearance and strength for the mortar specimens at different corrosion ages (0 d, 60 d, 90 d, 210 d, 270 d, 360 d) were compared and studied, and the corrosion products were analyzed by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). The results show that with the increase of erosion age, the erosion mode gradually transits from traditional ettringite type sulfate attack to thaumasite sulfate attack (TSA) with thaumasite as the erosion product. Limestone manufactured sand and limestone rock fines all can promote the TSA of mortar and concrete, and the effect of limestone rock fines is more obvious.?
    英文名 : Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment
    刊期 : 2022年第1期
    關鍵詞 : 石灰巖機制砂;石粉;硫酸鹽侵蝕;低溫;碳硫硅鈣石
    Key words : Limestone manufactured sand; Rock fine; Sulfate attack; Low temperature; Thaumasite
    刊期 : 2022年第1期
    DOI : 10.19761/j.1000-4637.2022.01.022.05
    文章編號 :
    基金項目 : 江西省交通運輸廳科技計劃項目(2020H0002)。
    作者 : 鄧俊雙1,徐志華1,李北星2,李 龍2
    單位 : 1.江西省交通工程集團有限公司,江西 南昌330000;2.武漢理工大學 硅酸鹽建筑材料國家重點實驗室,湖北 武漢430070

    鄧俊雙1,徐志華1,李北星2,李 龍2

    鄧俊雙,徐志華,李北星,等.低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究[J].混凝土與水泥制品,2022(1):22-26.

    DENG J S,XU Z H,LI B X,et al.Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment[J].China Concrete and Cement Products,2022(1):2022(1):22-26.

    摘要
    參數
    結論
    參考文獻
    引用本文

    摘   要:為研究低溫環境下石灰巖機制砂及石粉對混凝土抗硫酸鹽侵蝕性能的影響,以摻/未摻石灰巖石粉的機制砂砂漿、摻/未摻石灰巖石粉的天然砂砂漿為模擬對象,結合硫酸鹽腐蝕介質及低溫環境特點,采用溫度(5±1)℃的5%的MgSO4溶液模擬服役環境,對比研究了不同腐蝕齡期(0 d、60 d、90 d、210 d、270 d、360 d)試件的外觀和強度變化,并基于XRD、FTIR測試分析了侵蝕產物。結果表明:隨著齡期的增長,侵蝕方式由傳統的鈣礬石型硫酸鹽侵蝕逐漸過渡到以碳硫硅酸鈣為侵蝕產物的TSA巖侵蝕;石灰巖機制砂和石粉均能促使砂漿產生TSA侵蝕,且石粉的影響更加明顯。

    Abstract: In order to study the influence of limestone manufactured sand and limestone rock fines on the sulfate resistance of concrete under low temperature environment, the two kinds of manufactured sand mortars mixed with or without limestone rock fines, and the two kinds of natural sand mortars incorporated with or without limestone rock fines were used as the simulate objects. Combined with the characteristics of sulfate corrosion medium and low temperature environment, 5% magnesium sulfate solution at (5±1)℃ was used to simulate the service environment. The changes of appearance and strength for the mortar specimens at different corrosion ages (0 d, 60 d, 90 d, 210 d, 270 d, 360 d) were compared and studied, and the corrosion products were analyzed by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR). The results show that with the increase of erosion age, the erosion mode gradually transits from traditional ettringite type sulfate attack to thaumasite sulfate attack (TSA) with thaumasite as the erosion product. Limestone manufactured sand and limestone rock fines all can promote the TSA of mortar and concrete, and the effect of limestone rock fines is more obvious. 

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    (1)在低溫下,4組試件的抗硫鹽侵蝕性能為:NS-A>MS-A>NS-B>MS-B。
    (2)浸泡在MgSO4溶液中的4組試件強度發展類似,都呈現先增長后下降趨勢,90 d時強度發展到最大,90 d后,內摻石粉的天然砂和機制砂試件強度下降更為明顯。
    (3)NS-B、MS-A、MS-B 試件不同齡期的硫酸鹽侵蝕方式為:90 d以前,侵蝕為傳統的鈣礬石型硫酸鹽侵蝕;90~270 d,侵蝕為傳統的鈣礬石型硫酸鹽侵蝕和以碳硫硅酸鈣為侵蝕產物的TSA侵蝕共存,且鈣礬石型硫酸鹽侵蝕隨侵蝕齡期延長逐漸向TSA侵蝕轉化;270~360 d,侵蝕以TSA侵蝕為主;360 d以后,完全呈現TSA侵蝕。而NS-A試件在210 d才出現微弱的TSA侵蝕,且隨齡期進一步增長TSA侵蝕產物變化不大。表明石灰巖機制砂和石粉均能促進TSA侵蝕,且石灰巖石粉的促進作用更顯著。

    [1] 郭玉柱,王起才,代金鵬,等.5 ℃環境下水泥砂漿抗硫酸鹽侵蝕性能試驗研究[J].硅酸鹽通報,2017,36(9):3082-3087.
    [2] 盧都友,呂憶農.加強基礎研究確保機制砂石混凝土耐久性[J].混凝土世界,2011,22(4):68-72.
    [3] CRAMMOND N J.The Thaumasite Form of Sulfate Attack in the UK[J].Cement and Concrete Composites,2003,25(8):809-818. 
    [4] 胡明玉,唐明述.碳硫硅鈣石對混凝土的破壞作用[J].混凝土,2001(6):3-5.
    [5] 張昺榴,馬保國,王迎斌.水泥礦物組成對混凝土TSA侵蝕的影響[J].混凝土與水泥制品,2015(10):20-23.
    [6] NORAH C.The Occurrence of Thaumasite in Modern Construction-A Review[J].Cement and Concrete Composites,2002,24(3):393-402.
    [7] 李軍,青志剛,梁德興.中國西南沿海地區石灰巖機制砂對混凝土性能的影響研究[J].公路,2018,63(2):213-216.
    [8] 楊雷,張風臣,馬保國,等.碳硫硅酸鈣型硫酸鹽侵蝕測試方法[J].東南大學學報(自然科學版),2006(S2):55-60.
    [9] HARTSHORN S A,SHARP J H,SWAMY R N.Thaumasite Formation in Portland-limestone Cement Pastes[J].Cement and Concrete Research,1999,29(8):1331-1340.
    [10] LIU Z Q,DENG D H,SCHUTTER G D,et al.The Effect of MgSO4 on Thaumasite Formation[J].Cement and Concrete Composites,2013,35(1):102-108.
    [11] 肖佳,吳婷,郭慶偉,等.硫酸鎂對碳硫硅鈣石形成的影響[J].混凝土,2014(11):70-73.

    鄧俊雙,徐志華,李北星,.低溫環境下石灰巖機制砂砂漿抗硫酸鹽侵蝕性能研究[J].混凝土與水泥制品,2022(1):22-26.

    DENG J S,XU Z H,LI B X,et al.Sulfate Resistance of Limestone Manufactured Sand Mortar in Low Temperature Environment[J].China Concrete and Cement Products,2022(1):2022(1):22-26.

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