%0 Generic %A LANGTON, CHRISTINE ANN-SAWZIK. %T NEW CEMENTS FOR GEOTHERMAL WELLS: DETERMINATION OF PHASE RELATIONS, MICROSTRUCTURES, AND PHYSICAL PROPERTIES AND EVALUATION OF THE EFFECT OF ALKALIES FOR COMPOSITIONS IN THE SYSTEMS CALCIUM-OXIDE - ALUMINUM-OXIDE - SILICON-DIOXIDE - WATER AND CALCIUM-OXIDE - MAGNESIUM-OXIDE - SILICON-DIOXIDE - WATER CURED AT ELEVATED TEMPERATURES AND PRESSURES. %U https://ezaccess.libraries.psu.edu/login?url=http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:8105753