Laboratory production of calcium sulfoaluminate cements with high industrial waste content

Canbek, Ogulcan
Shakouri, Sahra
Erdoğan, Sinan Turhan
A drawback of conventional calcium sulfoaluminate (CSA) cement production is the use of the costly raw material bauxite as a source of alumina to form the main clinker phase ye'elimite. Replacement of bauxite with industrial wastes can benefit CSA cements economically and environmentally. This study demonstrates the use of high amounts of red mud, a sulfate-rich/high-lime fly ash, and desulfogypsum as raw materials in producing CSA clinkers and cements with better mechanical performances than an all-natural raw material CSA reference cement. Mineralogical compositions of the clinkers and hydrated cement pastes were investigated using x-ray diffraction, isothermal calorimetry, thermogravimetric analysis and scanning electron microscopy. Compressive strength development of mortars, made with citric acid, were studied up to 28 d. It was found that increasing fly ash increases the belitic nature, and increasing red mud increases the terrific nature of the clinkers. Mortars with 28-d strengths exceeding 40 MPa could be made with cements containing similar to 38% waste and only half the bauxite in the reference. Medium early and ultimate strength mortars could be made with a similar to 55% waste cement when bauxite was reduced to a quarter of the reference, with small additions of Ca(NO3)(2)center dot 4H(2)O or Li2CO3. Desulfogypsum, as a source of sulfates, was more beneficial to strength development than natural gypsum. Ye'elimite reactivity was enhanced in red-mud containing cements. Cements with both fly ash and red mud experienced lower carbonation than those made with only one of the two wastes.


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Perlite is a natural pozzolan abundant in several countries which are major producers of cement. This makes perlite attractive for producing sustainable concretes. Strength development and heat evolution of perlite-containing mixtures, and the influence of chemical and thermal activation on their early and later age properties were investigated using five activator chemicals and four curing temperature-duration combinations. Chemical activation could increase the 1-day, or 3-day compressive strengths of 25%...
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Kaolin, one of the materials of major importance for the ceramic and paper industry, is also used in the construction industry as a raw material for the production of white cement clinker and, in the form of metakaolin, as an artificial pozzolanic additive for concrete. Metakaolin is a vital component of high-performance and architectural concrete; however, its application in regular concrete is very limited due to relatively high production costs. This report evaluates the performance of a low-cost metakao...
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Citation Formats
O. Canbek, S. Shakouri, and S. T. Erdoğan, “Laboratory production of calcium sulfoaluminate cements with high industrial waste content,” CEMENT & CONCRETE COMPOSITES, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: