WATER USERS ASSOCIATIONS IN ARMENIA: CURRENT SITUATION AND FUTURE TRENDS
Experiences of Water Consumers Cooperatives accumulated in Armenia during the past six years have been mixed. Some cooperatives have provided evidence of being capable of organizing themselves and responding to the needs of their members more effectively than any central governmental organization. However, many other aspects are still unresolved. Created in 2001, the State Committee for Water Economy (SCWE) agreed recently to follow a more participatory approach in establishment of Water Users Associations and, on the basis of positive experiences worldwide, SCWE is willing also to scale up the process to the level of Water Users Federations.
Water users associations in Armenia : analysis of current situation and future trends
The experience of Water Consumers Cooperatives accumulated in Armenia during the past six years has been mixed. On one hand, some of the cooperatives have provided evidence of being potentially capable of organizing themselves and responding to the needs of their members more effectively than any central governmental organization. On the other hand, many other aspects are still unresolved. Created in 2001 the State Committee for Water Economy (SCWE) agreed recently to follow a more participatory approach in establishment of Water Users Associations and, on the basis of positive experiences worldwide, SCWE is willing also to scale up the process to the level of Water Users Federations.
Mechanical behaviour and durability of high volume fly ash cementitious composites
The purpose of this research is to separate different morphological particles of ASTM class F fly ash, and study their effect on mechanical behaviour and durability of high volume cementitious mixtures. In this research wet separation of raw fly ash is carried out, which resulted in three layers of different morphological particles. The first layer of particles float, comprise of about 1-5% of fly ash, is identified as cenospheres or hollow spheres. The second layer of particles is measured to be 55-60% of raw fly ash and consisting of porous spherical and rounded particles rich in Si and Al. The third layer particles is measured to be about 35-40% of raw fly ash. High volume fly ash cementitious composites containing second or third layer particles are tested under compression and bending, highlighting a higher strength and ductility in comparison to cementitious ones containing raw fly ash particles. KEYWORDS. Cementitious matrix; Raw fly ash; Second layer particles; Third layer particles.