Two beams forming part of the roof over the swimming pool at the school collapsed. The investigation showed that the cause of the failure was loss of strength due to conversion of high alumina cement concrete followed by sulphate attack leading to disruption of the concrete. The degree of conversion and loss of strength was greater than expected…

The Center for Building Technology (CBT) provides the technical and scientific bases for criteria and standards that improve the usefulness, safety, and economy of buildings while conserving building materials and energy. CBT's activities support the building technology program of the federal, state, and local government; assist design…

The Center for Building Technology (CBT) provides the technical and scientific bases for criteria and standards that improve the usefulness, safety, and economy of buildings. CBT research also aims at conserving building materials and energy. Individual projects may emphasize one or more of the center's typical activities in providing improved…