防水减缩组分在受热条件下对混凝土Cl^(-1)扩散系数的影响

Heating Condition Influence of Components of Waterproof and Shrinkage Reducing on Concrete Chloride Diffusion Coefficient

目的研究受热条件下混凝土中掺入硅油、有机硅防水剂及保水剂的Cl-扩散系数变化规律.方法利用电导率仪,试验根据NEL法测试原理,用自制的试验设备,测算出混凝土不同龄期的Cl-扩散系数变化规律.结果受热条件下,混凝土掺入硅油后Cl-扩散系数均高于不掺的;有机硅防水剂掺量小于0.83%和保水剂掺量小于0.01%时,混凝土Cl-扩散系数随掺量增加而降低.有机硅防水剂掺量大于0.83%和保水剂掺量大于0.01%时,混凝土Cl-扩散系数随掺量增加而增大,但3 d的保水剂混凝土Cl-扩散系数变化不明显.结论随着硅油掺量的增加,混凝土的Cl-扩散系数逐渐降低;有机硅防水剂和保水剂都存在最匹配掺量,不同掺量有机硅防水剂和保水剂的混凝土在受热条件下,Cl-扩散系数存在最低值.

The paper aims to investigate the heating condition variation of chloride diffusion coefficient of concrete mixing silicone oil,organosilicon waterproof agent and water retaining agent.The conductivity meter was used to measure the variational regulation of chloride diffusion coefficient of different ages concrete.The result demonstrates that in heating condition the chloride diffusion coefficients of concrete mixing silicone oil were higher than the blank.The chloride diffusion coefficients gradually decre...