The Perot Museum was conceived to be a ‘living’ example of engineering, sustainability, and technology at work. Architect Thom Mayne choose sustainability to be a key component of design. To demonstrate their commitment to sustainability, the owner and architect planned to enroll the completed project in three green-building accreditation programs - LEED, Green Globes, and the Sustainable Sites Initiative. Lattimore Materials Corp., a wholly owned subsidiary of Aggregate Industries (US) helped achieve the designer and owner achieve many of the rating systems’ requirements by providing more than 23,000 cubic yards of performance concrete.
While the owner and architect wanted a very sustainable project, the contractor still needed to manage and build a project in an efficient and economical process. Structural concrete was chosen as a major building component of the project. An interesting feature of the project was the structure’s concrete’s intensity. While the final structure is only five stories tall, it has the concrete volume of a building twice that height due to the double thickness of the floors designed to support the weight of the exhibits.
The contractor needed a concrete producer with the expertise to formulate performance mix designs using recycled ingredients without extending set time. Many of the interior structural elements were also to be exposed to public view, so the mix design and batching procedures had to deliver a final surface of consistent color, shading, and texture. And since the project was located in a highly congested part of Dallas, the contractor also required a supplier who could
deliver concrete on time and within project specifications.
Lattimore Materials was involved in the project from start to finish, bringing very different sets of expertise to this unique building. Lattimore Materials quality control experts provided the know-how necessary to provide a sustainable mix design for the structural concrete components and hardscape elements. The architect had wanted to incorporate fly ash in the structural concrete mixes. Chosen for its expertise and access to other cementitious materials, Lattimore’s use of up to 51 percent fly ash in the mix for the piers, columns, and slabs was also a big factor in its selection for the museum.
For the exposed interior structural walls and features, Lattimore created a mix design that included a slag sourced from Louisiana along with selected aggregates from their local material sources. Working with the concrete placing team, Lattimore provided ready mixed concrete for several mock-ups that assured the owner and architect that the desired light gray color could be achieved on the finished walls.
Lattimore offered a logistical advantage with ready mix concrete production facilities located in downtown Dallas. The Lattimore locations were ideal for reducing project transportation and energy savings. Another logistic benefit was the proximity of the Lattimore Quality Control center. The producer’s technicians were able to provide consistent communication with the contractor and owner’s testing representatives.
Lattimore Materials involvement in this award winning sustainable project provides a concrete example of how local material, delivery, and expertise can aid a contractor in the task of bringing a vision to reality.
· Customer Gates Precast
· Designer/Architect - Thom Mayne and his firm Morphosis Architects
· Contractor - Balfour Beatty Construction
· Products used - Ready Mixed Concrete