An investigation on the use of zeolite aggregates for internal curing of concrete

Effects of nano and micro size of CaO and MgO, nano-clay and expanded perlite aggregate on the autogenous shrinkage of mortar

“…The released water will contribute to restore part of the water which has been lost through internal or external drying. Many researchers reported the same results using different types of aggregates [1,11], superabsorbent polymers (SAP) [10,52], wood fibers [17] and recycled aggregates [22], expanded clay [6]. Now, there is a general agreement that lightweight aggregate reduces AS.…”

“…The goal of their study was to find an optimum where the AS reduction is as high as possible and the strength reduction as low as possible. In general, studies have been made towards the reduction of AS [1,2,[4][5][6]8,[10][11][12][13]. For mixtures of the same water-binder ratio and grading, no study on the effects of the EPA, nano-clay, MgO, CaO and nano-MgO and nano-CaO and their combinations on the mortars in terms of AS could be found in the literature up the date the study has been done.…”

“…In case the free AS of a concrete structure is prevented, internal tensile stresses exceeding the tensile strength of the concrete may develop at early ages. As a result, premature cracks may propagate, making the concrete more vulnerable to the ingress of potentially aggressive species, such as chlorides, sulfates, freezing water, CO 2 , thus severely reducing the durability and service life of concrete [5,6].…”

Engineering properties of concrete containing natural zeolite as supplementary cementitious material: Strength, toughness, durability, and hygrothermal performance

“…As it was reported by Ghourchian et al [36], MIP specific pore volume of pure clinoptilolite is about 0.08 cm 3 g À1 and dominantly pores smaller than 0.1 lm are present. Thus, a presence of unreacted zeolite in the mix should be accompanied by an increase of pore volume just in the range below 0.1 lm as it was observed in Fig.…”

Characterizations and Industrial Applications for Cement and Concrete Incorporated Natural Zeolite

“…Ghourchian et al [38] were conducted a study of the performance of the porous aggregates and concluded that the water desorption of the zeolites is closely related to their microstructure. For a proper desorption, a thick-pored structure is needed with a high proportion of well-interconnected pores.…”