Сетевое издание Совета ректоров вузов Большого Алтая « Nauka i obrazovanie Bolʹšogo Altaâ Наука и образование Большого Алтая» выпуск 1, 2017, страница 60 из 113 60 UDK 666.972 STUDY ON CRYSTALLIZATION PROCESS OF CEMENT PASTE FOR PORTLAND POZZOLAN CEMENT Erdenebat Tserenjav 1 , Usukhbayar B 1 , Nyamjargal M 1 , Lygdenov B.D 2 1 - Laboratory for Chemistry and Technology of New Materials, School of Applied Sciences and Engineering, National University of Mongolia (Ulaanbaatar, Mongolia) 2 - East Siberia State University of Technology and Management (Ulan-Ude, Russia) * - corresponding author erdenebatt@num.edu.mn ; lygdenov59@mail.ru 1. Introduction Coal is the most abundant resource of fossil fuel at the present in our country. Coal mines gradually shifted toward the modern industrial production and open-pit coal mines were created in almost every aimag and thermal coal domestic demand was completely increased too. Therefore coal has a relatively more importance for the economic growth of the country and our GDP rates, which is driven by coal mining industry’s contribution. From other hands the blended cement with high volume mineral additive (HVMA) meet low carbon economics in cement by using a low carbon concrete to increase product effciency to cement and an excellent durability in terms of hydraulic free or sulphate resistance and chloride mitigation for use fundamental structures of construction and highway [1]. Figure 1. Coal reserves in Mongolia Figure 2. Coal production and IBMA in Mongolia Recent days Mongolia has over 300 known coal deposits in 12 coal basins and 3 regions, which total reserve (Fig1) is estimated in 152 billion tons and 22.5 tons of