| 防护材料对不同强度等级混凝土基于碳化因素使用寿命的影响 |
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| 引用本文： | 杨永民,李学文,刘晓飞,赵可昕.防护材料对不同强度等级混凝土基于碳化因素使用寿命的影响[J].仲恺农业工程学院学报,2019,32(4):34-39. |
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| 作者姓名： | 杨永民 李学文 刘晓飞 赵可昕 |
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| 作者单位： | 1.仲恺农业工程学院城乡建设学院;2.广东省建筑材料研究院;3.广东辉固材料科技有限公司;4.华南理工大学机械与汽车工程学院 |
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| 摘 要： | 为研究防护材料对不同强度等级混凝土的碳化防护作用以及对其服役寿命的影响规律,通过加速碳化试验考察了3种水泥基渗透结晶材料的混凝土碳化防护性能,并依据Fick第一扩散定律建立和推导出混凝土碳化深度的预测公式,对防护后不同强度等级混凝土的服役寿命进行了定量表征.试验结果表明,经过防护后的混凝土结构使用寿命均得到了大幅度的提升,经过涂料防护的C20混凝土的使用寿命超过了100年,C15混凝土使用寿命低于100年,C10混凝土的使用寿命低于50年.结果表明,防护材料可有效提升混凝土的抗碳化性能,但对于C10等低强度等级的混凝土,经过涂料防护,碳化程度仍然较深.
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| 关 键 词： | 防护材料 混凝土 强度等级 碳化 使用寿命 |
| 收稿时间： | 2020-09-18 |
Effect of protective materials on the service life of concrete based on carbonization factors of different strength grades |
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| Abstract: | In order to study the protective effect of protective materials on the carbonation protection of concrete of different strength grades and its service life, the carbonation protection performance of three cement-based permeable crystalline materials was investigated by accelerated carbonation test. The prediction formula of concrete carbonation depth were derived, and the service life of concrete with different strength grades after protection were quantitatively characterized based on the Fick first diffusion law. The results indicated that the service life of the protected concrete structure have been greatly improved, the service life of C20 concrete after coating protection have exceeded 100 years, and the service life of concrete below C15 was less than 100 years, but the service life of the protected C10 concrete was still less than 50 years. That is, the protective material can effectively improve the carbonation resistance of the concrete, but for the C10 concrete, the degree of carbonization of the concrete is still deep after the coating protection. |
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