The Colorado Ready Mixed Concrete Association(CRMCA) has introduced a new document titled Exterior Concrete Flatwork Construction and Maintenance Best Practices that  focuses on the proper construction and maintenance techniques for exterior concrete flatwork in freeze-thaw climates. The CRMCA Technical Committee, chaired by JT Mesite, PE, CRMCA program manager, authored the document. CRMCA recently rolled out the publication at a seminar titled Modern Flatwork Finishing – Exterior Concrete Seminar which attracted nearly 150 owners, contractors, suppliers and engineers from the Denver metropolitan area.