Children’s Hospital of Richmond Wins Architectural Design Award for use of Slag Cement
Children's Hospital of Richmond at Virginia Commonwealth University is a multi-story, 640,000 square-foot, high-tech outpatient pavilion for pediatric services. The pavilion is the largest, most advanced children’s outpatient facility in the region. It includes diagnostic and treatment services, and is designed to meet the unique health care needs of children with the most advanced and coordinated care possible. As an oasis for children, the new space features a James River theme incorporating naturalistic elements of light and green space. As an oasis for children, the new space features a James River theme incorporating naturalistic elements of light and green space.
Slag cement was used at 60% of total cementitious content for the 11,000 cubic yards of mass concrete used in the mat foundation. Slag cement was also used at 40% in 3500-psi pumped structural lightweight concrete and in low-permeability, 5000-psi pumped structural concrete for the parking garage. Mass concrete specifications required strengths of 5000 psi and 7000 psi and included high temperature and differential temperature limits of 160°F and 35°F respectively. The mixture needed to be pumped and had to have a self-consolidating consistency in order to move through 6 to 7 feet of congested reinforcement with limited external consolidation. Concrete was placed in four pours using three ready mix plants to supply the required 300-400yds/hr within the time constraints of driver hours of service regulations and downtown overnight road closures. All concrete met 28-day strength requirements, temperature specifications, and not a single load was lost due to delivered quality.
Architectural features of the project include:
- Stepped planters with native vegetation and brick-and-stone paving at ground level
- An elevated Level 1 sky lobby includes an expansive outdoor sky garden equipped with an interactive play space, gardens, and trees
- Exposed concrete ground level columns and a Level 1 perimeter parapet wall
Project credits: Children’s Hospital of Richmond at Virginia Commonwealth University, Owner;
HKS, Inc. , Architect; Dunbar, Milby, Williams, Pittman & Vaughan, PLLC, Engineer; Skanska USA Building Inc., Construction Manager; Cleveland Cement Contractors, Contractor; Vulcan Materials Company, Concrete; LafargeHolcim, Slag Cement.