The improved freeze thaw experiment indicates that this additive can improve the long term anti water ability of acid aggregate asphalt mixture markedly.
强化冻融劈裂试验表明，开发研制的含铬外加剂能够显著提高酸性集料沥青混合料长期抗水损害能力。
2
The acid value of waste tire crumbs is tested, and the surface of crumbs are activated, then the crumbs are used as the modifier in asphalt mixture.
对废弃轮胎胶粉的酸值进行了测试，并据此进行了胶粉表面活化处理，再用作为沥青混合料的改性剂。
3
Lignitous coal, humic acid, fragments of plant remnants and asphalt are main forms of existing organic substances.