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A study on cement mortars incorporating plain Portland cement (PPC), ground granulated blast-furnace slag (GGBFS) and basaltic pumice

2005; Volume: 12; Issue: 3 Linguagem: Inglês

0975-1017

Hanifi Binici, Orhan Aksoğan, Hasan Kaplan,

Innovative concrete reinforcement materials

In this paper, an experimental investigation on the effect of ternary blending on the various properties of cement paste and mortar has been reported. The ternary blended cements have been prepared by using one type of clinker and two types of pozzolans. Two types of grinding techniques, two different fineness values and varying amounts of additives have been employed. Besides these, control pastes and mortars are prepared. The influence of fineness, different grinding techniques and other parameters on the strength of the ternary blended cements has been evaluated. The chemical compositions of the pozzolans are consistent with the requirements given in both the TS 25 (a Turkish standard) and ASTM C 168 standards. The results indicate that the basaltic pumice used in this study, taken from the Osmaniye-Adana province (Southern Turkey), can be used as an admixture in cement production. SEM, XRD and thin section analyses showed that a large quantity of sheet-like CSH was formed when a combination of basaltic pumice and slag were incorporated in the mortar. IPC Code: C04B26/00 The grinding techniques and compressive strength of cements have been the subjects of interest during recent years. Natural and synthetic materials that can contribute to the formation of cement are known as additives 1 . In general, the additives are introduced at the final phase of cement production and they may not be added in large amounts. The reasons for the use of these additives are due to the fact that they allow a reduction in the production cost and lead to modification of some physical and chemical properties of the cement. In the production of cement, the additives are classified as inert or active materials. In recent years, there has been some interest to compare the intergrinding and separate grinding of blast furnace slag 2,3 . One of the main aims of concrete technology is to make cement based materials environmentally friendly. Therefore, not only the good workability in fresh state and excellent mechanical properties and durability but also the environmental friendliness and economic benefits must be possessed by concrete materials 4 . The cement industry is one of the largest industrial energy users consuming about 1.5% of the total world fuel production and 2% of the global electricity production. The industry has been accused of wasting energy due to the low efficiency processes that it employs, such as burning, cooling and particularly