阳离子乳化沥青在酸性溶液中的浸出特性

为研究酸度对阳离子乳化沥青在溶液中浸出特性的影响,设计了阳离子乳化沥青在不同酸度溶液中的浸泡试验,结合分光光度法、滴定法和重量法等化学分析方法,研究了浸泡液固体悬浮颗粒、化学耗氧量、总硬度和阳离子乳化剂含量等指标,分析了浸泡液酸度对沥青组分、阳离子乳化剂和Ca2+,Mg2+浸出特性的影响规律.结果表明:在酸性溶液浸泡条件下,阳离子乳化沥青中的沥青组分、阳离子乳化剂以及Ca2+,Mg2+均被浸出,其中沥青组分和阳离子乳化剂浸出量较大,且浸泡液酸度越高,沥青组分浸出量越大,但酸度变化对阳离子乳化剂浸出量影响较小;另外,Ca2+,Mg2+浸出量较小,浸泡液酸度对其浸出量无明显影响.

Leaching Characteristics of Cationic Emulsified Asphalt in Acid Solution

In order to study the influence of acidity on leaching characteristics of cationic emulsified asphalt in solution, the immersiom experiments of cationic emulsified asphalt specimens in acid solution with different pH values were designed. Technical indexes, such as suspended solid particles, chemical oxygen demand, total hardness and cationic emulsifier content in immersion solution were studied with chemical analysis methods, such as spectrophotometric method, titrimetric method and weight loss method; and the influence of acidity on cationic emulsifier, asphalt component and Ca2+, Mg2+leaching characteristics was investigated. The results show that the emulsifier, asphalt components, Ca2+and Mg2+in cationic emulsified asphalt can all be leached. The leached amount of asphalt component and cationic emulsifier is great. The higher the acidity of immersing solution, the greater the leached amount. However, the acidity of immersion solution has less influence on the leaching of the emulsifier. Besides, the leached amount of Ca2+and Mg2+is less. The acidity of immersion solution has almost no influence on the leached amount of Ca2+and Mg2+.