机构地区: 华南理工大学材料科学与工程学院
出 处: 《华南理工大学学报(自然科学版)》 2003年第11期37-40,共4页
摘 要: 提出一种新的骨料碱活性检测方法———溶胶 -凝胶膨胀法 ,并用其对蛋白石和天然骨料的碱活性进行了研究 .试验结果表明 ,利用溶胶 -凝胶膨胀法 ,蛋白石表现出明显的碱活性 ,并且发现在蛋白石掺量为最劣点时的溶液中SiO2 含量和SiO2 /Na2 O摩尔比都达到最值 ,膨胀量也达到最值 . The application of a new test method for aggregate alkali activity,sol-gel expansion method,was presented,which was used to investigate the alkali activities of opal and natural aggregate. The experimental results show that by using the method,opal shows significant alkali activity,and at the pessimum proportion of opal,both SiO 2 content and SiO 2/Na 2O mole ratio in the reaction solution reach their maximum values,and so is the expansion.
领 域: [建筑科学]