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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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    房建材料及制品

    鋼絲網片增強混凝土外墻掛板抗彎性能研究
    鋼絲網片增強混凝土外墻掛板抗彎性能研究
    • 李清海,趙嬌嬌,李清原,高建偉,吳玉姣,周勝男
    2020年第11期
    摘要
    引用本文
    摘 ? 要:采用不同配筋率(0~1.20%)鋼絲網片對混凝土外墻掛板進行增強增韌,通過四點彎曲強度-撓度曲線,結合混凝土試件開裂過程的試驗現象,分析了配筋率對混凝土外墻掛板在彎曲荷載作用下不同階段強度、撓度的影響規律。結果表明,試件的比例極限強度、破壞強度及其對應撓度均隨配筋率的增加呈線性增加趨勢,配筋率增至1.20%時,試件比例極限強度、破壞強度分別比空白試件提高了5.33倍、3.53倍,同時試件的比例極限撓度和破壞撓度分別提高了3.77倍和3.57倍。配筋率對試件非線性變形階段的作用效果較準彈性階段更為顯著。通過對不同階段強度及其對應撓度與配筋率的擬合分析,得出強度、撓度與配筋率的數學關系,為混凝土外墻掛板的高性能結構設計提供依據。 Abstract: The steel mesh was used to strengthen and toughen concrete exterior wallboard with different reinforcement ratio(0~1.20%). Based on the strength-deflection curve of four point bending and the experimental phenomenon of concrete cracking process, the influence of reinforcement ratio on the strength and deflection of concrete exterior wallboard at different stages was analyzed. The results show that the proportional ultimate strength and failure strength with the corresponding deflection of the specimens increase with the increase of reinforcement ratio. When the reinforcement ratio increases to 1.20%, the proportional ultimate strength and failure strength of the specimens are 5.33 times and 3.53 times higher than those of the specimens without steel mesh respectively, and the proportional ultimate deflection and failure deflection of the specimens are 3.77 times and 3.57 times higher respectively. The effect of reinforcement ratio on the nonlinear deformation stage is more significant than that of quasi elastic stage. Through the fitting analysis of strength and corresponding deflection with reinforcement ratio at different stages, the mathematical relationship can be obtained between the strength and deflection with the reinforcement ratio, which provides the basis for the high-performance structural design of concrete exterior wallboard.
    李清海,趙嬌嬌,李清原,等.鋼絲網片增強混凝土外墻掛板抗彎性能研究[J].混凝土與水泥制品,2020(11):66-70. LI Q H,ZHAO J J,LI Q Y,et al.Study on the Flexural Performance of Steel Mesh Reinforced Concrete Exterior Wallboard[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):66-70.
    墻體材料蓄放熱性能動態測試方法
    墻體材料蓄放熱性能動態測試方法
    • 漆貴海1,2,3,賴振彬2,3,杜 松2,3
    2020年第11期
    摘要
    引用本文
    摘 ? 要:根據墻體材料在實際環境中的動態熱傳遞,設計了一種墻體材料蓄放熱性能動態測試方法:將墻體材料置于熱室和冷室之間,對熱室環境加熱和降溫,記錄墻體材料表面及室內環境的溫度變化,分析墻體材料的熱工性能。根據延遲時間、衰減系數、升溫和降溫曲線等評價了墻體材料的保溫隔熱性能,對反射隔熱涂料復合墻體材料進行了測試。結果表明:該方法能實現在試驗室中測試墻體材料的保溫隔熱性能,并能反映出墻體材料的動態傳熱過程,具有簡單易操作,試驗結果可靠的特點。 Abstract: According to the dynamic heat transfer of the wall material in the actual environment, a dynamic test method for the heat storage and release performance of the wall material is designed. The wall material is placed between the hot room and the cold room to heat and cool the hot room environment. The temperature changes of the wall material surface and the indoor environment are recorded, and the thermal performance of the wall material is analyzed. According to the results of delay time, attenuation coefficient, heating and cooling curve, the thermal insulation performance of the wall material is evaluated, and the performance of reflective thermal insulation coating composite wall material is tested. The results show that this method can test the thermal insulation performance of wall material in the laboratory, and reflect the dynamic heat transfer process of wall material. This method is simple and feasible, and the test results are reliable.
    漆貴海,賴振彬,杜松.墻體材料蓄放熱性能動態測試方法[J].混凝土與水泥制品,2020(11):71-73. QI G H,LAI Z B,DU S.Dynamic Testing Method for Heat Storage and Release Performance of Wall Material[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):71-73.
    基于超聲波技術的?;⒅橥鈮ν獗叵到y劣化特征研究
    基于超聲波技術的?;⒅橥鈮ν獗叵到y劣化特征研究
    • 葉家輝1,田靜靜2,熊厚仁1,袁克龍2,丁樹豐1,殷旭峰1,張奕沁1,金寒燁1
    2020年第11期
    摘要
    引用本文
    摘 ? 要:針對?;⒅橥鈮ν獗叵到y服役過程存在的病害特征,利用非金屬超聲檢測儀測試了該系統在室內加速老化過程的劣化特征信號,對比分析了系統老化狀態對不同部位的超聲波波速、頻率特征信號的影響,研究了不同熱雨循環階段該系統的超聲波信號特征與宏觀裂縫位置的對應性。結果表明:對于不同熱雨循環下的?;⒅橥鈮ν獗叵到y,超聲波信號異常位置與裂縫位置具有較好的對應性,系統飾面層的劣化特征與超聲波波速信號異常數量的增長趨勢一致,據此可實現該系統劣化階段的無損檢測;隨著熱雨循環次數的增加,超聲波信號頻率中心由低頻向高頻轉移。 Abstract: Aiming at the disease characteristics of the external thermal insulation composite systems with glazed hollow bead (ETICS-GHB) during the service process, the degradation characteristic signals of the ETICS-GHB were carried out by a non-metallic ultrasonic detector in accelerated aging process indoors. The ultrasonic wave velocity and frequency characteristic signals of different parts of the ETICS-GHB were studied at different aging state. The relationship between ultrasonic signal characteristics and macro cracks location of this system in different heat-rain cycle stages was analyzed. The results show that the abnormal position of the ultrasonic signal has a good correspondence with the crack location for the ETICS-GHB under different heat-rain cycles, and the deterioration characteristics of the finish coating of the ETICS-GHB are consistent with the increasing number of abnormal ultrasonic wave velocity signals, and the degradation level of the ETICS-GHB can be achieved by the non-destructive testing. With the increase of heat-rain cycles, the frequency center of the ultrasonic signal shifts from low frequency to high frequency.
    葉家輝,田靜靜,熊厚仁,等.基于超聲波技術的?;⒅橥鈮ν獗叵到y劣化特征研究[J].混凝土與水泥制品,2020(11):74-78. YE J H,TIAN J J,XIONG H R,et al.Research on Deterioration Characteristics of External Thermal Insulation Composite Systems with Glazed Hollow Bead Based on Ultrasonic Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 74-78.
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