Fremont Troll 的建造中使用了什么类型的混凝土?

详细说明

Fremont Troll 的建造使用了一种特殊的混凝土，旨在耐用并抵抗环境。这种混凝土的配方包括水泥、岩石和水的组合，以及添加剂以提高其强度和耐用性。. This guide entry applies to Fremont Troll at beneath Seattle's Aurora Bridge. Category: Architectural Features. Confirm current hours and policies on the official visitor guide at seattlefremonttroll.com. Primary references include the operator site, Wikipedia, Tripadvisor, Yelp, and Frommer's travel listings. Visitors typically plan 10-35 minutes at the under-bridge public artwork.