Sulfuric Acid Resistance of Concrete with Blast Furnace Slag Fine Aggregate  

作　　者：Paweena Jariyathitipong Kazuyoshi Hosotani Takashi Fujii Toshiki Ayano 

机构地区：[1]Research and Development Laboratory, Landes Co., Ltd, Okayama 719-3192, Japan [2]Technology Center, Landes Co., Ltd, Okayama 701-1351, Japan [3]Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan

出　　处：《Journal of Civil Engineering and Architecture》2014年第11期1403-1413,共11页土木工程与建筑（英文版）

摘　　要：The deterioration of concrete by sulfuric acid attack in sewage environments has become a serious problem for many existing sewage structures. In this study, the properties of concrete using the blast furnace slag have been examined. It was shown that by using the blast furnace slag fine aggregate and blast furnace slag fine powder, it is possible to enhance the resistance of mortar and concrete to sulfuric acid. The resistance to sulfuric acid of mortar and concrete can be improved by using a blast-furnace slag fine aggregate in the total amount of fine aggregate. When mortar or concrete reacts to sulfuric acid, dihydrated gypsum film is formed around the particulate of the fine aggregate. This dihydrated gypsum film could retard the penetration of sulfuric acid, thus, improving the resistance to sulfuric acid. Furthermore, it has been proved that the relationship between the erosion depth by sulfuric acid attack and the product of immersion period and concentration of sulfuric acid can be expressed linearly. However, this relationship is dependent on the type of materials of concrete.

关 键 词：Sulfuric acid attack blast furnace slag sand ground granulated blast fumace slag GYPSUM sewerage. 

分 类 号：TQ111.16[化学工程—无机化工] TU528.042[建筑科学—建筑技术科学]