The Portland Cement Association (PCA) will hold an event in a Joplin, MO, park next month promoting the benefits of building with concrete. PCA's Think Harder — Concrete Ideas for a Safer Joplin from 10 a.m. to 2 p.m. Saturday, October 20, in the park. There is no cost to attend and a free lunch will be served. NRMCA members Monarch Cement Co. and Joplin Concrete Co. will be represented, said Donn Thompson, PCA director of market strategy and positioning for the trade group.