报告题目：

Cheaper, Stronger, and “Greener” than Portland Cement

报告人:                        Prof. Yu Qiao

Structural Engineering & Materials Science and Engineering

University of California, San Diego

时间：2015年7月21日 (周二)   10:00                      

地点：中国科学院力学研究所主楼344会议室

报告摘要：

Each year, 1-3 billion tons of portland cement are consumed in the world, which leads to a gigantic, trillion-dollar market of concrete production. To manufacture 1 ton of portland cement, approximately 1 ton of carbon dioxide (CO2) would be generated, causing ~5% of the entire human-produced CO2 emission; and ~4 GJ energy would be consumed, accounting for 5-10% of the total industrial energy use. To enhance energy efficiency and to mitigate greenhouse gas effect, people are actively developing green cements.

One promising approach to avoid the energy-consuming and pollutive calcination process of portland cement is to direct bond together sand or soil grains by a polymer binder. Such a material is usually referred to as polymer cement (PC). PC is generally stronger, more durable, more water/corrosion resistant, and more adhesive than portland cement. However, the content of the expensive polymer binder is usually quite high, ~15 wt%; thus, the cost-performance balance of PC is relatively poor.

Recently, we developed a novel material, LOCH. LOCH may be viewed as a special PC, with the polymer content being greatly reduced to only 3-4 wt%. It is cheaper than portland cement, while its compressive and flexural strengths are higher than that of steel reinforced concrete. LOCH processing is fast, simple, and scalable. LOCH may pave the road to green buildings, green highways, green bridges, etc., with efficient construction and maintenance procedures, better structural properties, and longer service lives.   

报告联系人：沈楠  (office@lnm.imech.ac.cn 82543935)