Continuous Microstructural Correlation of Slag/Superplasticizer Cement Pastes by Heat and Impedance Methods via Fractal Analysis

Abstract

This paper presents a preliminary work to evaluate the influence of slag and superplasticizer on the early-age hydration of cement pastes by an innovative non-contact impedance measurement, heat evolution method, compressive strength and setting time tests. Besides, the cumulative pore volume obtained from modulus and phase of impedance in different hydration sections is taken to continuously correlate the cumulative heat releasing of cement pastes via the fractal § Corresponding author. This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited. analysis. Retarded phenomena and mechanism of hydration in cement pastes incorporated with slag and superplasticizer are studied, respectively. It is found that the compressive strength and setting time have a good linear relation with the slag amount in blended cement pastes. 1740003-1

Pore Structural and Fractal Analysis of the Influence of Fly Ash and Silica Fume on the Mechanical Property and Abrasion Resistance of Concrete

“…These results are in good agreement with previous findings 28,60 that the compressive strength of concrete increased linearly with the decrease in porosity. In fact, it is generally agreed that the mechanical property of concrete depends on the pore structures 26,27 . These close correlations could explain the different effects of fly ash and silica fume on the mechanical property of concrete.…”

“…There is a consensus that the mechanical and durability properties of concrete are closely related with its pore structure such as the porosity and the pore size distribution [26][27][28] . It has been suggested that the pore structure of concrete presents fractal characteristics within certain scales 24,26,29,30 .…”

“…There is a consensus that the mechanical and durability properties of concrete are closely related with its pore structure such as the porosity and the pore size distribution [26][27][28] . It has been suggested that the pore structure of concrete presents fractal characteristics within certain scales 24,26,29,30 . Fractal dimension, which is an index derives from the fractal theory, is progressively employed to characterize the complexity and irregularity(pore size distribution) of the pore structure and macroproperties of concrete 25,27,29,31 .…”

Effects of Fineness and Content of Phosphorus Slag on Cement Hydration, Permeability, Pore Structure and Fractal Dimension of Concrete

“…In addition, concrete is a typical porous material and possesses obvious fractal characteristics in pore shape, pore area and pore volume [20][21][22] . According to the fractal theory, the fractal dimension is an important parameter to characterize the complexity and inhomogeneity of the pores in concrete [21][22][23][24][25] .…”

Editorial

“…The branching networks such as tree branches, leaf veins, blood vessels, bronchial tree etc abound in nature, and fractal theory has been used to characterize the topology and transport properties of natural and industrial branching networks. 8 Sheng et al 9 introduced a random fractal algorithm based on Lindenmayer system to generate fracture networks according to the micro-seismic data, and evaluate the effective stimulated reservoir volume in shale gas reservoirs. Lu et al 10 presented a fractal model for the net present value of multi-stage fractured horizontal wells in tight gas reservoir, where a fractal gas permeability model with slippage effect was employed to characterize the apparent permeability of reservoir stratum.…”