苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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房建材料及制品

基于超声波技术的玻化微珠外墙外保温系统劣化特征研究
基于超声波技术的玻化微珠外墙外保温系统劣化特征研究
  • 叶家辉1,田静静2,熊厚仁1,袁克龙2,丁树丰1,殷旭峰1,张奕沁1,金寒烨1
2020年第11期
摘要
引用本文
摘   要:针对玻化微珠外墙外保温系统服役过程存在的病害特征,利用非金属超声检测仪测试了该系统在室内加速老化过程的劣化特征信号,对比分析了系统老化状态对不同部位的超声波波速、频率特征信号的影响,研究了不同热雨循环阶段该系统的超声波信号特征与宏观裂缝位置的对应性。结果表明:对于不同热雨循环下的玻化微珠外墙外保温系统,超声波信号异常位置与裂缝位置具有较好的对应性,系统饰面层的劣化特征与超声波波速信号异常数量的增长趋势一致,据此可实现该系统劣化阶段的无损检测;随着热雨循环次数的增加,超声波信号频率中心由低频向高频转移。 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.
叶家辉,田静静,熊厚仁,等.基于超声波技术的玻化微珠外墙外保温系统劣化特征研究[J].混凝土与水泥制品,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.
墙体材料蓄放热性能动态测试方法
墙体材料蓄放热性能动态测试方法
  • 漆贵海1,2,3,赖振彬2,3,杜 松2,3
2020年第11期
摘要
引用本文
摘   要:根据墙体材料在实际环境中的动态热传递,设计了一种墙体材料蓄放热性能动态测试方法:将墙体材料置于热室和冷室之间,对热室环境加热和降温,记录墙体材料表面及室内环境的温度变化,分析墙体材料的热工性能。根据延迟时间、衰减系数、升温和降温曲线等评价了墙体材料的保温隔热性能,对反射隔热涂料复合墙体材料进行了测试。结果表明:该方法能实现在试验室中测试墙体材料的保温隔热性能,并能反映出墙体材料的动态传热过程,具有简单易操作,试验结果可靠的特点。 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.
漆贵海,赖振彬,杜松.墙体材料蓄放热性能动态测试方法[J].混凝土与水泥制品,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.
钢丝网片增强混凝土外墙挂板抗弯性能研究
钢丝网片增强混凝土外墙挂板抗弯性能研究
  • 李清海,赵娇娇,李清原,高建伟,吴玉姣,周胜男
2020年第11期
摘要
引用本文
摘   要:采用不同配筋率(0~1.20%)钢丝网片对混凝土外墙挂板进行增强增韧,通过四点弯曲强度-挠度曲线,结合混凝土试件开裂过程的试验现象,分析了配筋率对混凝土外墙挂板在弯曲荷载作用下不同阶段强度、挠度的影响规律。结果表明,试件的比例极限强度、破坏强度及其对应挠度均随配筋率的增加呈线性增加趋势,配筋率增至1.20%时,试件比例极限强度、破坏强度分别比空白试件提高了5.33倍、3.53倍,同时试件的比例极限挠度和破坏挠度分别提高了3.77倍和3.57倍。配筋率对试件非线性变形阶段的作用效果较准弹性阶段更为显著。通过对不同阶段强度及其对应挠度与配筋率的拟合分析,得出强度、挠度与配筋率的数学关系,为混凝土外墙挂板的高性能结构设计提供依据。 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,赵娇娇,李清原,等.钢丝网片增强混凝土外墙挂板抗弯性能研究[J].混凝土与水泥制品,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.
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