Physical growth of society increases the consumption of materials. Therefore nowadays the material eco-efficiency became very important. Since the construction minerals are one of the non-renewable resources thus their eco-efficiency is the most important. The aim of this work was to evaluate the eco-efficiency of construction minerals by sustainability approach.
It is estimated that the construction minerals make 32 % of all resources. In Lithuania there are five kinds of construction minerals that are exploited: limestone, dolomite, clay, gravel and sand. Sand and gravel form a major part of all exploitable resources (75 %), while dolomite only 14 %, limestone – 8 %, and clay – 3 %. The extraction of all construction minerals is estimated to be 95 %, import – 5%, and export – 4% of total construction mineral input. In this work it was determined that during the analysed period, from 1996 to 2006, the direct construction materials input and consumption fluctuated. The biggest consumption’s growth – twofold incease – was during the period of 2001-2006.
It was determined that the eco-efficiency of construction minerals also underwent fluctuation during 1996-2006. It was influenced by the economical crisis in Russia in 1999ies. However, the change of eco-efficiency got a tendency of slight increase, and in 2006 the eco-efficiency was higher by 46 % than in 1996.
It can be concluded that construction sector, especially new buildings, has the highest impact on the consumption of construction minerals. However, the length of driven roads and the house square per capita have the lowest effect on the consumption of construction minerals. On the basis of long-term strategies of these sectors it is proposed that the consumption of construction minerals will be increasing in the future. Furthermore, the effectiveness of construction mineral exploitation will be achieved through motivation to utilise the secondary mineral waste, and by search and implementation of innovations into the industry.
Raktažodžiai: constuction minerals, sustainability, eco-efficiency, decoulping