本文選題：多聚磷酸改性瀝青　切入點：黏彈性　出處：《復(fù)合材料學報》2017年02期 　論文類型：期刊論文

【摘要】：基于黏彈性理論,對不同質(zhì)量分數(shù)(0.5wt%,1.0wt%,1.5wt%,2.0wt%)的多聚磷酸改性瀝青及基質(zhì)瀝青進行低溫彎曲流變試驗(BBR),結(jié)合Burgers模型對低溫彎曲梁流變試驗得到的蠕變數(shù)據(jù)進行非線性擬合,利用Burgers模型的四個參數(shù)(E_1、η_1、E_2、η_2分別是Maxwell和Kelvin模型中彈性模量和黏性系數(shù))確定出低溫性能指標,對多聚磷酸改性瀝青低溫性能進行分析。結(jié)果表明:多聚磷酸的添加使瀝青中的黏性和彈性都得到了一定的改善,瀝青中松弛時間減少,儲存能減少,耗散能增加,應(yīng)力松弛能力得到提高。在相同溫度下,多聚磷酸改性瀝青延緩了瀝青進入蠕變穩(wěn)定期的時間,但隨著溫度的降低,達到蠕變穩(wěn)定期的時間縮短。多聚磷酸改性劑的添加可以提高瀝青低溫性能,且隨質(zhì)量分數(shù)的增加,低溫改善效果更好;但隨著溫度的降低,多聚磷酸對瀝青的低溫改善程度減小,且不同質(zhì)量分數(shù)對其影響的差異也減小,在-24℃以上適合使用多聚磷酸改性,而在-24℃以下?lián)饺攵嗑哿姿岣男詾r青意義不大。
[Abstract]:Based on the viscoelastic theory, the low temperature bending rheological tests of polyphosphoric acid modified asphalt and matrix asphalt with different mass fraction of 0.5 wt and 1.0 wtand 1.5wt and 2.0wtrespectively were carried out. The creep data obtained from the rheological tests of low temperature bending beams were fitted with Burgers model. Using the four parameters of the Burgers model, E _ s _ 1, 畏 _ _ _. The low temperature properties of polyphosphoric acid modified asphalt were analyzed. The results showed that the viscosity and elasticity of asphalt were improved with the addition of polyphosphoric acid, the relaxation time in asphalt decreased, the storage energy decreased, and the dissipation energy increased. The stress relaxation ability was improved. At the same temperature, the polyphosphate modified asphalt delayed the time of entering the creep stability period, but with the decrease of temperature, The addition of polyphosphate modifier can improve the low temperature performance of asphalt, and with the increase of mass fraction, the effect of low temperature improvement is better, but with the decrease of temperature, The degree of improvement of polyphosphoric acid on asphalt at low temperature is reduced, and the influence of different mass fraction on it is also reduced. It is suitable to use polyphosphoric acid above -24 鈩，

本文編號：1613583