檢測及試驗方法研究_2020_《混凝土與水泥制品》雜志社

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檢測及試驗方法研究

混凝土回彈儀（2.207J）分段率定計量研究

魏超琪1，王磊2，張鵬1，趙慶航1，賀晶晶3

2020年第10期

摘要

引用本文

摘 ? 要：研究了混凝土回彈儀鋼砧率定值與其硬度及質量間的關系，確定了一款比較適合中型回彈儀用的輕型鋼砧（率定值為40±1）。結果表明：該輕型鋼砧可有效提升回彈儀檢定周期內常用示值區間段回彈值的重復性、穩定性和準確性，同時，可確?；貜梼x的使用過程處于標準狀態，進而提高回彈法檢測混凝土抗壓強度的精度。 Abstract: Based on the study of the relationship between the setting value of steel anvil and its hardness and weight, a light steel anvil with the setting value of 40±1 was determined. The results show that the light steel anvil can effectively improve the repeatability, stability and accuracy of the rebound value of commonly used indication interval in the verification cycle of the rebound instrument. In addition, it can ensure that the use process of the rebound instrument is in a standard state, thereby improving the accuracy of the rebound method for testing the compressive strength of concrete.

魏超琪,王磊,張鵬,等.混凝土回彈儀（2.207J）分段率定計量研究[J].混凝土與水泥制品,2020(10):83-86. WEI C Q,WANG L,ZHANG P,et al.Research on the Section Calibration and Measurement of Concrete Rebound Instrument(2.207J)[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):83-86.

熱重分析法在混凝土碳化深度檢測中的應用

李蓓1,2，金南國2，田野2，金賢玉2，李鑫燚1

2020年第10期

摘要

引用本文

摘 ? 要：針對現有酚酞試劑法無法精確測定混凝土碳化程度的不足，基于熱重法定量分析CaCO3含量的試驗原理，利用TA-Q500熱重分析儀在原材料相同的條件下對不同水灰比及齡期條件下的混凝土碳化深度進行了檢測，并闡述了該方法的具體操作步驟。結果表明：與酚酞試劑法相比，熱重分析法可以定量分析碳化混凝土中的Ca(OH)2 和CaCO3含量，具有快速、方便的特點，且受環境和人為因素的影響較小，測試結果相對穩定準確。 Abstract: In view of the phenolphthalein method cannot accurately measure the concrete carbonation degree, based on the experimental principle of quantitative analysis of CaCO3 content by thermogravimetric method, the carbonation depth of concrete under different water cement ratio and age conditions was tested by TA-Q500 thermogravimetry analyzer under the same raw materials, and the specific operation steps of the method were described. The results show that compared with the phenolphthalein reagent method, the thermogravimetry method can quantitatively analyze the content of Ca(OH)2 and CaCO3 in carbonated concrete, which has the characteristics of rapidity and convenience, and is less affected by the environment and human factors, and the test results are relatively stable and accurate. ?

李蓓,金南國,田野,等.熱重分析法在混凝土碳化深度檢測中的應用[J].混凝土與水泥制品,2020(10):80-82,86. LI B,JIN N G,TIAN Y,et al.Application of Thermogravimetric Analysis Method in Detecting Carbonation Depth of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):80-82,86.

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