Abstract
It is known that the cement industry is responsible for 5-8% of world CO2 emissions and also for intensive energy consumption. For this reason, cement productions need to sustainability studies. Mineral admixtures added to cement as partial replacement material enable to sustainable blended cement productions due to used less amount of cement. Mineral admixtures with pozzolanic property are also preferred in terms of increasing cement performances. This situation corresponds to improved performance of cement and concrete products as well as saving energy, reducing world CO2 emissions. In recent years, the cement industry has been using natural zeolites extensively as pozzolanic materials. Analcime is known as second valuable zeolite mineral after from clinoptilolite in natural zeolite groups The aim of this study is to determinate the pozzolanic properties of analcime and to investigate whether it has potential availability in sustainable blended cement production. The clinoptilolite was used with comparison purpose in this study. Blaine values, densities, chemical composions, pozzolanic activities, mineralogical structures of analcime and clinoptilolite which are subject of study were determined. Accordance with TS 25, which contains pozzolan conformity criterias, 7-days average compressive strength values of lime-pozzolan mixture samples were determined. The datas obtained shown that, the 7-days average compressive strengths of lime-zeolite (pozzolan) blended samples are 9.02 MPa for clinoptilolite and 6.3 MPa for analcime. The total content of Si02 + Al2O3 + Fe2O3 was 77.3% for clinoptilolite and 73.16% for analcime. Accordingly, analcime which is a natural zeolite satisfies to puzolan conformity criterias in TS 25 has the potential to be an alternative to clinoptilolite which is more widely used in cement productions.
Highlights
Cement is a construction material that needs to sustainability studies due to the decrease of non-renewable energy resources and the increase of CO2 emissions in the world
The following methods were used for the determination of these parameters effected on pozzolanic activity of natural zeolites used in the study
1) It has been determined that both natural zeolites used in the study have potential to be used in sustainable blended cement productions
Summary
Cement is a construction material that needs to sustainability studies due to the decrease of non-renewable energy resources and the increase of CO2 emissions in the world. The easiest solution in sustainability studies is to produce blended cement by using pozzolans. The use of pozzolans which are substituted by cement has become very popular. The use of portland cement in a lesser amount leads to less energy consumption and less CO2 emissions. More environmentalist, energy saving, economical and sustainable cement productions can be possible. The pozzolans with high activity affect positively to performances of mortar/concrete. Pozzolans are defined as materials with silica and alumina. They have either any or very low binding property on their own. In the fine grained state, they are capable of exhibiting hydraulic binding when combined
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
