Constitute the main material of concrete

 In March this year , China's first A high-rise building on suspicion of Shenzhen Ping An was ordered to use substandard concrete work to make rectification , dealing with the construction Main structure of the quality of the concrete core once again  become the focus of attention .
On the other hand , constitute the main material of concrete - cement, also faces severe challenges. Precast concrete plant known as the greatest invention of the 20th century building , on the Earth's climate , it is unfortunate. As Today this material most widely used in a large kiln firing  limestone and precast concrete plant to generate one tons per Cement , there will be nearly one ton of carbon dioxide emissions into the air. In the anthropogenic emissions of greenhouse gases ,Approximately 5% from cement production , increasing environmental pollution.