Studies on Some Indigenous Materials for Their Puzzolanic Properties

Puzzolanic activities of indigenous materials such as clays, shales, slates, volcanic ash and laterite from different localities of Pakistan are studied. Puzzolanic properties of rice hush ash are also discussed. All of these materials except laterite, behave as good quality puzzolanas. Correlation between the type of clays and their puzzolanic reactivities have been discussed. The commercial use of these materials is recommended.