混凝土碳化性能及气体渗透性相关性研究
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摘要
研究了水灰比、粉煤灰含量对混凝土的气体渗透性和碳化深度的影响,同时对碳化性能和气体渗透性的相互关系进行了深入研究。试验结果表明混凝土气体渗透性和碳化深度均随着水灰比的增大而增加,但是随着粉煤灰含量的提高,气体渗透性逐渐降低,但是碳化深度却逐渐提高。同时,研究还表明混凝土碳化性能与混凝土水泥含量关系密切,与混凝土气体渗透性相关性不大。
Effects of water-cement ratio and fly ash content on gas permeability and carbonization depth of concrete were investigated.And the relationship between carbonization resistance and gas permeability of concrete was also discussed.Results showed that the gas permeability and the carbonization depth both increased with the increasing of water-cement ratio.Adding fly ash content decreased the gas permeability,but increased the carbonization depth.In addition,results also showed that the carbonation resistance of concrete was closely related to the cement content and was irrelevant to the gas permeability.
Effects of water-cement ratio and fly ash content on gas permeability and carbonization depth of concrete were investigated.And the relationship between carbonization resistance and gas permeability of concrete was also discussed.Results showed that the gas permeability and the carbonization depth both increased with the increasing of water-cement ratio.Adding fly ash content decreased the gas permeability,but increased the carbonization depth.In addition,results also showed that the carbonation resistance of concrete was closely related to the cement content and was irrelevant to the gas permeability.
引文
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[13]崔圣爱,刘品,沈彬然.天然火山灰混凝土抗碳化性能试验研究[J].铁道工程学报,2015,32(9):97-102.
[2]KOLLEK J J.The determination of the permeability of concrete to oxygen by the Cembureau method-a recommendation[J].Materials and Structures,1989,22(3):225-30.
[3]CHEN W,LIU J,BRUE F,et al.Water retention and gas relative permeability of two industrial concretes[J].Cement and Concrete Research,2012,42(7):1001-13.
[4]张国荣,韩依璇,SKOCZYLAS F,等.混凝土气体渗透性测试技术研究[J].硅酸盐通报,2015,34(s1):116-22.
[5]张士萍,张厚先,张才南,等.混凝土气体渗透性的评价方法研究[J].混凝土,2014(5):6-9.
[6]刘斌.大掺量粉煤灰混凝土的抗碳化性能[J].混凝土,2003(3):44-8.
[7]程云虹,闫俊,刘斌,等.粉煤灰混凝土碳化性能试验研究[J].公路,2007(12):165-7.
[8]周啸尘,施惠生.利用气体渗透性评价高性能混凝土的碳化性能[J].建筑材料学报,2004,7(2):150-5.
[9]DAVY C A,SKOCZYLAS F,BARNICHON J D,et al.Permeability of macro-cracked argillite under confinement:gas and water testing[J].Physics and Chemistry of the Earth,Parts A/B/C,2007,32(8):667-680.
[10]费正岳,李延波,张士萍.基于气体渗透性的混凝土碳化性能研究[J].混凝土,2014(12):22-4.
[11]庄园,潘志宏,马剑,等.掺钢渣再生骨料自密实混凝土碳化性能研究[J].四川建筑科学研究,2017,43(1):122-6.
[12]施惠生,居正慧,郭晓潞,等.ITZ形成机制及其对混凝土力学性能与传输性能的影响[J].建材技术与应用,2014(6):11-8.
[13]崔圣爱,刘品,沈彬然.天然火山灰混凝土抗碳化性能试验研究[J].铁道工程学报,2015,32(9):97-102.