Influence of slag fineness on the strength and heat evolution of multiple-clinker blended cements

Date

2017-11-30

Author

Erdoğan, Sinan Turhan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

199
views

0
downloads

Three clinkers and a blast furnace slag, ground separately, were combined to produce 27 cements. Each cement consisted of 35% fine (similar to 6000 cm(2)/g), 25% intermediate (similar to 4000 cm(2)/g), and 40% coarse (similar to 2500 cm(2)/g) particles. Slag made up the fine or intermediate particles in the blended cements, clinkers making up the remainder. Compressive strength was measured up to 28 d on mortars and heat evolution was investigated up to 48 h using isothermal calorimetry. Portland cements with different rates of strength gain and heat evolution could be obtained by mixing different clinkers. By combining clinkers, cements with lower early heat but higher strength could be prepared. The fine particles in the cements are responsible for strength gain up to 3 d, but the intermediate fraction is crucial for 28-d strength. Slag increasingly contributes to hydration after the 3-7 d period. Fine slag particles decrease early strength but allow high later-age strengths while intermediate slag particles allow smaller drops in early strength but yield lower 28-d strengths. Similarly, replacement of fine clinker particles with slag decreases 12-h heat more than replacement of intermediate particles but the difference diminishes beyond about 24 h. A strong linear relation exists between the 24-h and 48-h heats of the cements and could be useful for modelling the hydration rate of Portland or blended cements. Moderate relations exist between 12-48-h heat, and 1-7-d strength. A strong linear relation is observed between strength and heat measurements made at the same age. Strengths of the cement mortars are mostly within 20% of that estimated by the developed relation.

Subject Keywords

Slag, Blended cements, Separate grinding, Hydration, Heat, Fineness, Strength, Clinker

URI

https://hdl.handle.net/11511/34302

Journal

CONSTRUCTION AND BUILDING MATERIALS

DOI

https://doi.org/10.1016/j.conbuildmat.2017.08.120

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Influence of mineral admixture type and amount on rheological properties of mortars Idrees, Maria; Tokyay, Mustafa; Department of Civil Engineering (2016) Fly ash (FA), silica fume (SF) and ground granulated blast furnace slag (BFS) are used in different amounts to partially replace portland cement (PC) on mass basis to prepare mortars mixtures with different water-binder ratios. In all mixtures, a constant amount of a polycarboxylate based high range water reducing admixture was used. The rheological measurements of fresh mortars were taken right after mixing and at 10 and 20 minutes after mixing by using a two-probe eBT2 rheometer. The effect of each minera...
Use of granulated blast furnace slag and lime in cement-bentonite slurry wall construction Talefirouz, D.; Çokça, Erdal; Omer, J. (2016-01-01) This paper describes an experimental investigation on the use of ground granulated blast furnace slag (GGBFS) and lime as stabilizers for cement-bentonite (CB) slurry used in constructing vertical barrier walls. The primary objective is to develop a blended material, which can reduce the permeability and also enhance the strength of CB slurry walls with a shortened curing time. Mixtures comprising various proportions of cement, bentonite, GGBFS, and lime were prepared and tested for particle size distributi...
Comparison of intergrinding and separate grinding for the production of natural pozzolan and GBFS-incorporated blended cements Erdogdu, K; Tokyay, Mustafa; Turker, P (1999-05-01) A portland cement clinker, a natural pozzolan, and a granulated blast furnace slag (GBFS) were used to obtain blended cements that contain 25% mineral additives. The natural pozzolan, which was softer, was more grindable and granulated blast furnace slag, which was harder, was less grindable than the clinker. Two of the cements produced were obtained by intergrinding and the other two were obtained by separate grinding and then blending. All of the blended cements and the control cement without any additive...
Effect of particle size and slag content on the early hydration of interground blended cements Cetin, Can; Erdoğan, Sinan Turhan; Tokyay, Mustafa (2016-03-01) Three blended cements prepared by intergrinding 6-35% slag with clinker and gypsum, and a control portland cement, were sieved to yield 0-10 mu m, 10-30 mu m, 30-50 mu m, and >50 mu m subgroups. Clinker/slag/gypsum contents, and oxide compositions of the subgroups differed significantly from the unsieved cements. Fine subgroups always contained more gypsum and had lower slag-to-clinker ratios than coarse subgroups. Heat evolution was investigated up to 48 h using isothermal calorimetry. Contribution of slag...
Influence of high-pressure grinding rolls on physical properties and impact breakage behavior of coarsely sized cement clinker Camalan, Mahmut; Onal, Mehmet Ali Recai (2016-01-01) High-pressure grinding rolls (HPGR) are widely used in cement clinker grinding prior to ball milling. The efficiency of HPGR was previously related to two capabilities: (a) efficient stressing mechanism and (b) weakening of particles which lead to finer product sizes after subsequent ball milling. This study aimed to investigate the influence of HPGR on the impact breakage behavior of coarsely sized cement clinker. Drop weight tests were conducted on three single-size samples from both feed and product stre...

Citation Formats

S. T. Erdoğan, “Influence of slag fineness on the strength and heat evolution of multiple-clinker blended cements,” CONSTRUCTION AND BUILDING MATERIALS, pp. 800–810, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34302.