During 19th/20th century in territory of Latvia dolomitic romancement was the main hydraulic binder applied for the construction of buildings. It was processed since 1865 by firing local raw material - dolomitic marl below its sintering temperature (800-900ºC) and fine milling. Nowadays there is absence of information about the material characteristics and technologies for its restoration. Moreover, local deposits of dolomitic marl in industrial scale are no more available. The aim of investigation was to obtain a binder for restoration needs from Latvia’s clay and dolomite compatible with historically used dolomitic romancement. Mixtures from two types of clay and dolomite in powder state were synthesized. Samples were prepared by mixing the raw materials, semidry pressing and firing at 750-950°C temperatures. Thermochemical processes in dolomite-clay mixtures depending on production temperature and clay type were compared by using XRD analysis and full chemical analysis.