Early-age activation of cement pastes and mortars containing ground perlite as a pozzolan

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% perlite mortars to above the cement-only control but was not very beneficial to 50% perlite mixtures. Thermal activation could increase strength at ages up to 28 days, and even above the room-temperature control at 1 day. Perlite content affects the maximum value of the isothermal calorimetry heat evolution rate but not its time of occurrence. Chemical and thermal activation influence both the height of the rate peak and its timing, which are linearly correlated for activated or non-activated pastes with a given perlite content.


Properties of Ground Perlite Geopolymer Mortars
Erdoğan, Sinan Turhan (American Society of Civil Engineers (ASCE), 2015-07-01)
Perlite is a volcanic aluminosilicate abundant in several countries that are major producers of portland cement. The amorphous nature and silica-to-alumina ratio of ground perlite indicate that it can be activated with alkaline solutions. This study presents the strength development of mixtures containing only ground perlite as their powder binder, activated with sodium hydroxide and/or sodium silicate solutions, at room temperature or using oven curing. The structure of the formed geopolymers is investigat...
Laboratory production of calcium sulfoaluminate cements with high industrial waste content
Canbek, Ogulcan; Shakouri, Sahra; Erdoğan, Sinan Turhan (Elsevier BV, 2020-02-01)
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...
Properties of blended cements with thermally activated kaolin
Arikan, Metin; Sobolev, Konstantin; Ertuen, Tomris; Yeginobali, Asim; Turker, Pelin (Elsevier BV, 2009-01-01)
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...
Effect of material characteristics on the properties of blended cements containing high volumes of natural pozzolans
Turanlı, Lutfullah; Uzal, B; Bektas, F (Elsevier BV, 2004-12-01)
The effect of three different natural pozzolans from Turkish deposits on the properties of blended cements produced by intergrinding cement clinker with a high volume of natural pozzolan (55 wt.% of the cementitious material) was investigated. The particle size distribution of blended cements, setting time, heat of hydration, and compressive strength of blended cement mortars were determined. Experimental results showed that the hardness of the pozzolanic material strongly influenced the particle size distr...
Synthesis of special cement with fluidised bed combustion ashes
Selçuk Yüce, Nihal; Soner, I.; Selçuk, Emre (Thomas Telford Ltd., 2010-04-01)
Fluidised bed combustion (FBC) ashes containing a significant amount of free calcium oxide and calcium sulfate in addition to valuable inorganic acidic oxide ingredients such as silicon oxide, ferric oxide and aluminium oxide can be utilised as potential raw materials in the production of non-expansive belite-rich calcium sulfoaluminate cement, which is one of the special cement types having performance characteristics similar to those of ordinary Portland cement in addition to having lower energy requireme...
Citation Formats
S. T. Erdoğan, “Early-age activation of cement pastes and mortars containing ground perlite as a pozzolan,” CEMENT & CONCRETE COMPOSITES, pp. 29–39, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46970.