摘要
本文主要介绍北京地区部分混凝土集料碱活性的鉴定结果,以及北京市个别混凝土工程发生碱-集料反应的诊断结果。现有资料表明,北京地区存在大量碱活性集料。这些集料会与水泥中的碱发生化学反应,使混凝土膨张开裂,从而对混凝土工程的物理力学性能及耐久性等造成不良影响,这将导致重大经济损失,应当引起有关部门的重视。
Results in the appraisaf of alkali activity of concrete aggregates in Beijing Area and in the diagnoses of alkali aggregate reactions which occured in a few concrete construction work in Beijing are mainly introduced hereof. The available information shows that there are a lot of active-to-alkali aggregates in Beijing Area. These aggregates wilf react with the alkali in cement, cause the expansion and breaking of concrete, and therefore harmfully affect the physico-mechanic perform- ances and durability of concrete work, which will bring about great losses in economics and should be paid attention by the related authority.
出处
《水泥》
CAS
1990年第8期7-11,25,共6页
Cement
