Effect of cement composition on the early hydration of blended cements with natural zeolite

Rahhal, Viviana Fátima; Pavlík, Zby ek; Tironi, Alejandra; Castellano, Claudia C.; Trezza, Mónica Adriana; Černý, Robert; Irassar, Edgardo F.

doi:10.1007/s10973-016-6007-4

Cited by 27 publications

(27 citation statements)

References 35 publications

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“… high amount of replacement by zeolite [ 56 , 80 ]; the structure of zeolite (clinoptilolite) crystalline grid-cavities, interconnected by channels, enables water to be stored, leading to a decrease in consistency [ 81 ]; a less amount of water (w/b = 0.3) [ 82 ]. The same is also seen when the results for zeolite and silica fume are compared.…”

Section: Resultsmentioning

confidence: 99%

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

2021

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This experimental study focuses on the assessment of mineral additives and their incorporation into cement composites (CC). The assessment was based on a holistic approach to the performance of the durability properties of CC. Environmental suitability was also taken into consideration. In the experiments, cement pastes with w/c ratios of 0.3, 0.4, and 0.5, respectively, were prepared. Natural zeolite (NZ) and densified silica fume (SF) at doses of 7.5 and 15.0 wt.% of cement were used as the investigated (replacement) materials. Their effects (including development over time) on density, strength (flexural and compressive), porosity by water absorption, permeability by rapid chloride penetration (RCP) test, phase content by thermal analysis, and hydration progression, were observed. The results were then used to propose an evaluation approach. Natural zeolite was used for its known pozzolanic activity and classification as a supplementary cementitious material (SCM). In contrast SF acted as a filler in cement pastes, and thus did not have a direct positive effect on durability. The concept of comprehensive analysis for unknown additive classification is proposed to expressly differentiate between SCM, inert, and improving mineral additive. This concept could be applied to the assessment of mineral additives with regards to the durability and suitability of cement composites.

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Section: Resultsmentioning

confidence: 99%

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

2021

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“…The addition of zeolite-bearing pozzolan to portland cement causes several effects: the hydration of the cement occurred much earlier (12,15,50,51,52,53), the high exchange capacity of pore solution ions influenced the formation of C-S-H and the later pozzolanic activity. The reactivity depends on the type and characteristics of zeolite, and the mordenite type zeolite appears as slow reactive (12,17).…”

Section: Discussionmentioning

confidence: 99%

Pozzolanic activity of argentine vitreous breccia containing mordenite

et al. 2020

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A vitreous breccia with variable amount of mordenite was studied for its use as pozzolan. The raw material was characterized by optical and scanning electron microscopy (SEM), X-ray diffraction (XRD), and the zeolite content was estimated by the methylene blue staining technique. After being ground, physical characteristics, cation exchange capacity (CEC), pozzolanicity, and the compressive strength activity index (SAI) were determined. The staining technique and the CEC measurement were used to evaluate the average content of zeolite. The vitreous breccia has pozzolanic activity after 7 days, the water demand increases slightly, and its addition stimulates the early hydration of portland cement. At later ages, the pozzolanic reaction around the grains, as revealed by SEM studies, improves the compressive strength of blended cements having a SAI > 0.85 at 28 days.

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“…It is necessary to consider that the hydration of the cement is perhaps the most important aspect because it will derive almost all the processes addressed in this article, besides being a determining factor in the cementing process of the mixture. Several researchers [84,93,94] concluded that the addition of zeolite to the cement paste greatly increases the early stage of hydration, and therefore, it is not recommended to exceed 40% of pozzolanic addition in the mixture. In this way, operational parameters that contribute to the development of a composite mix with the best features and operational performance can be established.…”

Section: Elaboration Methodsmentioning

confidence: 99%

“…However, its use as a cement for construction is the most researched application [9,41,93,96], and this is obvious when the main function of this compound is to work as an alternative to ordinary cement (usually the Portland type) in the cement industry building. Although there are other applications of the same scope and not so obvious, which have not been given the same attention, among them we can find its use for the stabilization of sandy soils prior to the construction of roads [102,103], agent for the reduction in pollutants and environmental conditions [76,104], and its application in cementing operations carried out on the high seas and oil platforms [46,105].…”

Section: Special Applications Of These Compositesmentioning

confidence: 99%

Characterizations and Industrial Applications for Cement and Concrete Incorporated Natural Zeolite

Domínguez¹,

Abdellaoui²,

Abatal³

et al. 2018

Zeolites and Their Applications

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Zeolites have been widely used in various industries, leading to a high commercial value; this is mainly due to the wide diversity of naturally occurring species and the ability to synthesize new types. In the cement and concrete industry, natural zeolite is a popular natural pozzolanic material in some regions of the world owing to their economic, environmental, and technical advantages, among others, used pozzolanic materials. Many works have reported the use of natural zeolite as substituent material for cement in mortar and concrete. Generally, the use of natural zeolite can overcome environmental and economic problems associated with the use of high quantity of cement; furthermore, it is shown a strength enhancement and durability improvement properties of cement and concrete composites. In this context, this chapter strives to review the application of natural zeolite as pozzolan in cement and concrete composites, its characteristic, its proper incorporation, and each of the influencing parameters. In addition, the elaboration methods, textural and mechanical characterization, and applications of these composites will be treated.

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Effect of cement composition on the early hydration of blended cements with natural zeolite

Cited by 27 publications

References 35 publications

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

Pozzolanic activity of argentine vitreous breccia containing mordenite

Characterizations and Industrial Applications for Cement and Concrete Incorporated Natural Zeolite

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