Determination of particle size, surface area, and shape of supplementary cementitious materials by different techniques
Eleni C. Arvaniti,Maria C.G. Juenger,Susan A. Bernal,Josée Duchesne,Luc Courard,Sophie Leroy,John L. Provis,Agnieszka J. Klemm,Nele De Belie +8 more
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TLDR
In this article, the surface area and particle size distribution of supplementary cementitious materials (SCMs) are measured using various methods, such as air permeability, sieving, laser diffraction, optical flow analysis, image analysis, and MIP.Abstract:
The particle size distribution, surface area and shape are fundamental characteristics of supplementary cementitious materials (SCMs). Accurate measurement of these properties is required in computational efforts to model the hydration process, and the characterization of these parameters is also an important practical issue during the production and use of blended cements. Since there are no standard procedures specifically for the determination of physical properties of SCMs, the techniques that are currently used for characterizing Portland cement are applied to SCMs. Based on the fact that most of the techniques have been developed to measure cements, limitations occur when these methods are used for other materials than cement, particularly when these have lower fineness and different particle shape and mineralogical composition. Here, samples of fly ash, granulated blast furnace slag and silica fume were tested. Different results obtained using several methods for the determination of specific surface area are presented. Recommendations for testing SCMs using air permeability, sieving, laser diffraction, BET, image analysis and MIP are provided, which represent an output from the work of the RILEM Technical Committee on Hydration and Microstructure of Concrete with Supplementary Cementitious Materials (TC-238-SCM).read more
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Supplementary cementitious materials: New sources, characterization, and performance insights
TL;DR: In this paper, a review of emerging supplementary cementitious materials (SCM) sources is presented, along with new developments in characterizing and qualifying SCMs for use and improved knowledge of SCM on long-term concrete performance and durability.
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Predicting the compressive strength of normal and High-Performance Concretes using ANN and ANFIS hybridized with Grey Wolf Optimizer
TL;DR: The hybridization of the models with GWO improves the training and generalization capability of both ANN and ANFIS models and it is deduced that ANN models trained with Levenberg-Marquardt algorithm outperformed other ANN-based models as well as all ANfIS- based models.
Journal ArticleDOI
Advances in alkali-activation of clay minerals
Ahmed Khalifa,Özlem Cizer,Yiannis Pontikes,Andrew Heath,Pascaline Patureau,Susan A. Bernal,Alastair Marsh,Alastair Marsh +7 more
TL;DR: In this article, the authors present an approach for processing and activating 1:1 (kaolinite, halloysite) and 2: 1 (montmorillonite, illite) clay minerals.
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Granite quarry waste as a future eco-efficient supplementary cementitious material (SCM): Scientific and technical considerations
TL;DR: In this article, the authors assess the viability of designing new blended cements in which 10% or 20% of the clinker is replaced with granite sludge by analysing the effect of its inclusion on the chemical, rheological, mechanical and microstructural properties of the end product.
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Effects of the physicochemical properties of fly ash on the compressive strength of high-volume fly ash mortar
TL;DR: In this article, the effect of physicochemical properties of fly ash, including the particle sizes and chemical composition of the amorphous phase, on the compressive strength of high-volume fly ash mortars was investigated.
References
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Book
The chemistry of cement and concrete
TL;DR: The chemistry of cement and concrete as discussed by the authors, The chemistry of concrete and its properties, and the relationship between concrete and cement, is a classic example of such an approach. But it is not suitable for outdoor use.
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Supplementary cementitious materials
TL;DR: The use of silica-rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials.
Book
Lea's chemistry of cement and concrete
P. C. Hewlett,F. M. Lea +1 more
TL;DR: The history of calcareous cements and Portland cements can be found in this paper, where the structure and cementing qualities of cement compounds the constitution of Portland cement, the burning of Portland Cement, the hydration of PortlandCement, resistance of concrete to natural destructive agencies physical and mechanical properties of Portland cement pozzolanas and pozzolanic cements cements made from blast furnace slag high alumina cement some special cements, and cement properties cement admixtures concrete aggregates.
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New perspectives in mercury porosimetry
TL;DR: In this article, the authors discuss the need to develop concerted efforts towards expanding the interpretation of mercury porosimetry data by examining the virtues and flaws of various reported attempts to generate particle size distributions, inter-and intraparticle porosities, pore tortuosities and pore ratios from mercury intrusion and/or extrusion curves.
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Mercury porosimetry—breakthrough pressure for penetration between packed spheres
Raymond P. Mayer,Robert A. Stowe +1 more
TL;DR: In this article, the porosity of the spherical model and the contact angle of the fluid were derived for describing the penetration of fluids into the void spaces of a collection of uniform solid spheres.