Effect of acid rain on economic loss of concrete structures in Hangzhou, China

摘要

Hangzhou is one of the most serious acid rain polluted cities in China due to rapid economic development and increasing coal consumption. In order to study concrete erosion caused by acid rain and corresponding economic loss in Hangzhou, acid rain status in Hangzhou was analyzed from 1983 to 2015, and concrete damage was field surveyed, then laboratory sulfate attack experiments were conducted under dry-wet cycling based on the similar erosion intensity, after that, economic loss by acid rain on residential concrete structures in Hangzhou was estimated. The research shows that Hangzhou is moderate or strong erosion during the last thirty years. Sulfate attack results in concrete loose and powdery, and concrete mass growth while cube strength of concrete decreases. The economic loss of acid rain pollution is over 2 million US$ per annum in Hangzhou. It is believed that acid rain control has a long way to go in Hangzhou.