000002114 001__ 2114
000002114 005__ 20141118153442.0
000002114 04107 $$acze
000002114 046__ $$k2013-05-27
000002114 100__ $$aFERREIRA, Luís
000002114 24500 $$aMATURITY DESIGN OF ALKALI-ACTIVATED MORTAR MIXTURES

000002114 24630 $$n1.$$pProceedings of the First International Conference on Concrete Sustainability
000002114 260__ $$bJapan Concrete Institute, Tokyo
000002114 506__ $$arestricted
000002114 520__ $$2eng$$aThe development of innovative eco-efficient cementitious materials is, nowadays, a wide-spread concern to assure the sustainability of the built environment. In this scope, alkali-activated binders, in which ordinary Portland cement (OPC) is (totally or partially) replaced by industrial by-products, can be a very interesting solution. The alkaline activation of aluminosilicate materials, such as fly ash, consists in adding an alkaline solution to fly ash and then to subject it to curing at a prescribed temperature level, thus promoting the transition from fresh to hardened state. Since the curing temperature level is relatively high, these new bindings are interesting mainly for the precast industry. However, since the curing temperature is a significant parameter for these binders, it is important to check if the maturity method is applicable. This method allows monitoring and forecast the compressive strength evolution as a function of time and temperature, according to Arrhenius equation. The present study aims at applying the maturity method to alkali-activated binders and at establishing the strength-maturity relationship through laboratorial tests. Different mixtures of alkali-activated mortars were produced, varying the type and concentration of the alkaline activator. The influence of OPC as addition was also studied. The main conclusion and contribution of this work is the demonstration of the applicability of the maturity method for monitoring alkali activated mortars (AAM).

000002114 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002114 653__ $$aAlkali-Activated Mortar, fly ash, maturity method, sustainability constructions

000002114 7112_ $$aFirst International Conference on Concrete Sustainability$$cTokyo (JP)$$d2013-05-27 / 2013-05-29$$gICCS13
000002114 720__ $$aFERREIRA, Luís$$iJÚLIO, Eduardo$$iBRANCO, Fernando G.
000002114 8560_ $$ffischerc@itam.cas.cz
000002114 8564_ $$s844406$$uhttp://invenio.itam.cas.cz/record/2114/files/S2-1-3.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000002114 962__ $$r2053
000002114 980__ $$aPAPER