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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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    節能與環保

    離子侵蝕對再生混凝土多重界面區(ITZ)性能的影響
    離子侵蝕對再生混凝土多重界面區(ITZ)性能的影響
    • 宮堯堯1,李楠2,張蕾3,班順莉1,岳公冰4,高嵩1
    2021年第2期
    摘要
    引用本文
    摘 ? 要:通過研究氯離子和硫酸根離子侵蝕下再生混凝土不同界面過渡區的顯微結構以及顯微硬度變化,揭示了離子侵蝕對再生混凝土結構和性能的影響機理。結果表明:再生混凝土經氯離子侵蝕后,骨料老界面、骨料新界面、砂漿新界面的顯微硬度逐漸降低,過渡區寬度逐漸增加;氯離子侵蝕前后,同種界面過渡區顯微硬度值隨著新澆筑砂漿強度等級的增加而增大,且氯離子擴散系數與界面過渡區寬度成正相關性;硫酸根離子侵蝕再生混凝土的界面過渡區寬度有所增加,顯微硬度降低,界面區的致密性下降。 Abstract: The microstructure and micro-hardness changes of different interface transition zones of recycled concrete eroded by chloride ion and sulfate ion were studied to reveal the effect mechanism of ion erosion on the structure and performance of recycled concrete. The results show that the micro-hardness of the old aggregate interface, the new aggregate interface and the new interface of mortar gradually decreases and the width of the transition zone gradually increases after the chlorine ion erosion of the recycled concrete. Before and after chloride ion erosion, the micro-hardness of the same interface transition zone increases with the increase of the strength grade of the newly poured mortar, and the chloride ion diffusion coefficient has a positive correlation with the width of the interface transition zone. The width of the interfacial transition zone of the recycled concrete eroded by sulfate ion increases. The micro-hardness decreases, and the compactness of the interfacial zone decreases.
    宮堯堯,李楠,張蕾,等.離子侵蝕對再生混凝土多重界面區(ITZ)性能的影響[J].混凝土與水泥制品,2021(2):91-96. GONG Y Y, LI N,ZHANG L,et al.Effect of Ion Erosion on Interface Transition Zone Performance of Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):91-96.
    過硫磷石膏礦渣水泥混凝土的研究與應用進展
    過硫磷石膏礦渣水泥混凝土的研究與應用進展
    • 水中和1,吳赤球2,孫濤1,呂偉2
    2021年第2期
    摘要
    引用本文
    摘 ? 要:討論了高摻量磷石膏礦渣膠凝材料體系的化學反應原理和微觀結構形成機理,介紹了以該膠凝材料體系為基礎制備生態低碳水泥混凝土及相關制品的關鍵技術。分析了高摻量磷石膏基輕骨料的研制及其在道路基層中應用的最新進展。并基于高摻量磷石膏基水泥混凝土及其制品存在的問題,對其發展前景進行了展望。 Abstract: The chemical reaction principle and microstructure formation mechanism of the high-volume phosphogypsum slag cement material system are discussed, and the key technologies for preparing ecological low-carbon cement concrete and related products based on the cement material system are introduced. The latest development of the development of high-volume phosphogypsum-based lightweight aggregate and its application in road base are analyzed. Based on the problems of high-volume phosphogypsum-based cement concrete and its products, its development prospects are prospected.
    水中和,吳赤球,孫濤,等.摻稻殼灰/硅灰混凝土的性能研究[J].混凝土與水泥制品,2021(2):97-100. SHUI Z H,WU C Q,SUN T,t al.RResearch and Application Progress of Excess-sulfate Phosphogypsum Slag Cement ConcreteJ].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):97-100.
    摻稻殼灰/硅灰混凝土的性能研究
    摻稻殼灰/硅灰混凝土的性能研究
    • 王剛1,2
    2021年第2期
    摘要
    引用本文
    摘 ? 要:研究了稻殼灰、硅灰、稻殼灰+粉煤灰、硅灰+粉煤灰對混凝土抗壓強度、抗折強度、抗硫酸侵蝕能力和抗碳化能力的影響。結果表明:摻加5%~10%稻殼灰或硅灰有助于提升混凝土的抗壓強度和抗折強度,且稻殼灰、硅灰摻量越高抗壓強度越高,摻硅灰混凝土相對于摻稻殼灰混凝土的抗壓和抗折強度更高,摻稻殼灰+粉煤灰、硅灰+粉煤灰試件的抗壓和抗折強度低于基準組;稻殼灰相較于硅灰能更好地降低混凝土的干密度,而硅灰相較于稻殼灰能更好地降低試件的吸水率,粉煤灰的摻入會降低試件的干密度,但吸水率明顯增加;摻加稻殼灰、硅灰有助于提升試件的抗硫酸侵蝕能力,且硅灰的提升效果優于稻殼灰,摻入粉煤灰后試件的抗硫酸侵蝕能力進一步提高;摻稻殼灰、硅灰試件的抗碳化能力均優于基準組,且硅灰的改善效果優于稻殼灰,而摻入粉煤灰的試件抗碳化性能最差。 Abstract: The effects of rice husk ash, silica fume, rice husk ash+fly ash, silica fume+fly ash on compressive strength, flexural strength, sulfuric acid resistance and carbonation resistance of concrete were studied. The results show that the addition of 5%~10% rice husk ash or silica fume can improve the compressive strength and flexural strength of concrete, and the higher the content of rice husk ash or silica fume, the greater the compressive strength. The compressive strength and flexural strength of the specimens with rice husk ash+fly ash or silica fume+fly ash are lower than those of blank group. Rice husk ash has a better ability to reduce the dry density of concrete than silica fume, while silica fume has a better role in reducing the water absorption than rice husk ash. The addition of fly ash will reduce the dry density of concrete, but the water absorption is significantly increased. Adding rice husk ash or silica fume can improve the sulfuric acid resistance of concrete, and the improvement effect of silica fume is better than that of rice husk ash, and the sulfuric acid resistance of concrete is further improved after adding fly ash. The carbonation resistance of the specimens with rice husk ash or silica fume is better than that of blank group, and the improvement effect of silica fume is better than that of rice husk ash, while the carbonation resistance of the specimens with fly ash is the worst.
    王剛.摻稻殼灰/硅灰混凝土的性能研究[J].混凝土與水泥制品,2021(2):101-104. WANG G.Properties of Concrete Mixed with Rice Husk Ash or Silica Fume[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):101-104.
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