- 吳建華，張亞梅，孫 偉
２００8年第6期
摘要
引用本文
摘 要：對混凝土典型的碳化模型及碳化試驗方法進行了調研，比較了各種模型、試驗方法或測試技術的原理和適用范圍，并分析了各自的優缺點。傳統混凝土碳化研究的思路和方法存在諸多局限性，不能將實驗室研究較好地與現場檢測結果關聯起來。以耐久性劣化指標為主導的方法，為耐久性研究樹立了一新概念。與碳化過程密切相關的表層混凝土的氣體擴散系數、pH值與可碳化物質含量，能夠反應表層混凝土被碳化的程度以及可能的劣化趨勢；此外，新的測試方法摒棄了傳統的破損方式，從而架起了實驗室與現場研究之間的橋梁。通過將表層混凝土的滲透性與堿儲備狀態結合起來考慮，采用適當的碳化模型，可建立滲透性、堿含量等參數與劣化性能之間的關系，從而可較全面客觀地評估混凝土的耐久性。
Abstract：The carbonation models and test methods for concrete are reviewed，and their principles, application scopes, merits and shortcomings are analyzed. Because of the limitations of traditional research methods, it is difficalt to liking the lab results with the in-situ test results. A new methad, which take the deterioration indicator of concrete as the main factor, build up the new concept for research the durability of concrete, i. e. the gas diffusion coefficient, pH value and the content of alkali substances can reflect the degree of carbonation and the deterioration trend of coveral concrete. Meanwhile, a new non-destructive test methods will set up a bridge between the lab and the in-situ research. Therefor, based on test rezults of the permeability and the alkali coutent of coveral concrete, and using of a suitable carbontion model, a relationship between the deleriaration degree of concrete properties and the parameters of concrete, such as permeability ,alkali content, etc. will be built up. And that will make the evaluation of concrete durability more objective.
