limestone

RESTORATION, CHEMICAL AND TECHNOLOGICAL RESEARCH OF STONE SCULPTURE OF ST. YAN NEPOMUTSKY FROM THE VILLAGE OF CHABARIVKA, VASYLKIV DISTRICT, TERNOPIL REGION

The sculptural composition originates from the village of Chabarivka, Vasylkiv district, Ternopil region (since 2015). On the map of 1779-1783 by Friedrich von Mieg, the sculpture of St. John of Nepomuk is marked with a red cross, located in the eastern part of the village stretched along the road, opposite the manor. The road from Kopychyntsi to Husiatyn passed to the north of the settlement.

Development of Heterogeneous Alkali Methoxide Catalyst from Fly Ash and Limestone

This study is aimed to use fly ash and limestone as raw materials for preparing alkali methoxide heterogeneous catalysts for transesterification of palm oil into biodiesel. The heterogeneous catalyst was synthesized from fly ash and limestone through wet and dry methods and calcined within 1073–1273 K. X-ray diffraction and scanning electron microscopy analyses indicated the well-dispersed presence of the Ca(OCH3)2 crystal over the fly ash and limestone framework, which was mixed using wet method and calcined at 1073 K (W-800).

STONE MEMORIAL PLASTIC OF THE BORYSLAV: HISTORICAL CITY CEMETERIES: CURRENT STATE

The memorial plastics of the two oldest cemeteries of Boryslav is investigated. Tthe damage and losses of ensembles of cemeteries in general and separate monuments were carried out. The identification of the stone material of tombstones is performed, the state of preservation of their physical substance is analyzed.

Вплив карбонатних добавок на властивості портландцементу композиційного

The effect of carbonate additives on physical and mechanical properties of type II Portland cement was investigated. It was shown that calcium carbonate which is added as fine ground mineral additive, participates in the phase composition and microstructure formation of Portland composite cement paste.