Results 11 to 20 of about 208,381 (311)

Hydration and Fractal Analysis on Low-Heat Portland Cement Pastes Using Thermodynamics-Based Methods

open access: yesFractal and Fractional, 2023
Low-heat Portland (LHP) cement is a kind of high-belite cement, which has the characteristic of low hydration heat. Currently, it is extensively used in the temperature control of mass concrete. Based on the thermodynamic database of OPC-based materials,
Yifan Zhou   +9 more
doaj   +1 more source

Treatment of end-of-life concrete in an innovative heating-air classification system for circular cement-based products [PDF]

open access: yes, 2020
A stronger commitment towards Green Building and circular economy, in response to environmental concerns and economic trends, is evident in modern industrial cement and concrete production processes.
Di Maio, F.   +4 more
core   +2 more sources

A Comparative Study Between the Early Stages Hydration of a High Strength and Sulphate Resistant Portland Cement and the Type II F Portland Cement Through Non Conventional Differential Thermal Analysis and Thermogravimetry [PDF]

open access: yesMaterials Research, 2015
This work presents a study, which compares the early stages of hydration of a High Initial Strength and Sulphate Resistant Portland Cement (HIS SR PC) with those of Type II F Portland Cement (PC II), by Non-Conventional Differential Thermal Analysis ...
Alex Neves Junior   +3 more
doaj   +1 more source

Ultrasonic sound speed analysis of hydrating calcium sulphate hemihydrate \ud [PDF]

open access: yes, 2011
This article focuses on the hydration, and\ud associated microstructure development, of b-hemihydrate\ud to dihydrate (gypsum). The sound velocity is used to\ud quantify the composition of the fresh slurry as well as the\ud hardening and hardened—porous ...
Brouwers, H.J.H., Korte, A.C.J. de
core   +5 more sources

Study on the effect of activated coal gangue on the mechanical and hydration properties of cement

open access: yesFrontiers in Materials, 2023
This study aims to minimize the carbon emissions of cement and investigate the viability of employing activated coal gangue (CG) as an additional cementitious ingredient.
Zewen Zhu   +12 more
doaj   +1 more source

Portland cement hydration in the presence of admixtures: black gram pulse and superplasticizer

open access: yesMaterials Research, 2008
Effect of admixtures such as black gram pulse (BGP) and sulfonated naphthalene based superplasticizer (SP) on the hydration of Portland cement has been studied. The hydration characteristics of OPC in the presence of BGP and SP were studied with the help
Viveka Nand Dwivedi   +4 more
doaj   +1 more source

Hydration characteristics of cement pastes incorporating electric arc-furnace slag [PDF]

open access: yes, 2012
This paper presents the results of a comparative study of the hydration characteristics of cement pastes incorporating steel slag or ground granulated blastfurnace slag (GGBS) as substitutes for ordinary Portland cement (OPC).
Muntasser, T. Z., Nwaubani, Sunny O.
core   +1 more source

Hydration process and strength development of autoclaved products using skarn-type copper tailings

open access: yes工程科学学报, 2015
Hydration reactions of samples made from skarn-type copper tailings, blast furnace slag, quartz sand, cement clinker and natural gypsum during the process of pre-curing, autoclaving and re-curing were investigated by strength testing, X-ray diffraction ...
ZHU Li-ping   +4 more
doaj   +1 more source

Quantitative study of hydration of C3S and C2S by thermal analysis. Evolution and composition of C-S-H gels formed [PDF]

open access: yes, 2010
This research is part of a European project (namely, CODICE project), main objective of which is modelling, at a multi-scale, the evolution of the mechanical performance of non-degraded and degraded cementitious matrices.
A Fernández-Jiménez   +32 more
core   +3 more sources

Effect of C-S-H Nucleating Agent on Cement Hydration

open access: yesApplied Sciences, 2021
This work aims to study the effect of a nucleating agent on cement hydration. Firstly, the C-S-H crystal nucleation early strength agent (CNA) is prepared.
Wenhao Zhao   +3 more
doaj   +1 more source

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