Results 51 to 60 of about 4,892 (215)

BLENDED CALCIUM ALUMINATE-CALCIUM SULFATE CEMENT-BASED GROUT FOR P-REACTOR VESSEL IN-SITU DECOMMISSIONING [PDF]

, 2011
The objective of this report is to document laboratory testing of blended calcium aluminate - calcium hemihydrate grouts for P-Reactor vessel in-situ decommissioning.
D. Stefanko, C. Langton, Langton, C., Stefanko, D.   +3 more
core   +1 more source

Optimization of mix proportion of super-early-strength cement grouting material and experimental study on its working performance

Ain Shams Engineering Journal
This paper investigates the effect of a novel super-early-strength cement grout composite on water leakage in the shield section of metro tunnels in operation.
Xiaokai Niu, He Wang, Zhitian Xie, Wei Song, Mingxing Li, Chentao Xu   +5 more
doaj   +1 more source

Templating effect of alginate and related biopolymers as hydration accelerators for calcium alumina cement - A mechanistic study

Materials & Design, 2020
In earlier publications it has been demonstrated that alginate and similarly structured biopolymers unexpectedly accelerate the hydration of calcium alumina cement. Here, this effect is investigated by applying 27Al MAS NMR spectroscopy and XRD technique
Alexander Engbert, Johann Plank
doaj   +1 more source

Influence of calcium sulphoaluminoferrite on the cement stone structure [PDF]

E3S Web of Conferences, 2020
Usually to obtain expansive cements sulphoaluminate clinker or mix aluminate clinker with calcium sulphates (gypsum, hemihydrate, anhydrate) are used. This paper deals with the composition and properties of solid solution of calcium sulphoaluminoferrite.
Samchenko Svetlana, Zorin Dmitriy
doaj   +1 more source

Molecular Dynamics Simulations of γ‐Belite(010)–Water Interfaces With High‐Dimensional Neural Network Potentials

Chemistry – A European Journal, EarlyView.
Several γ$\gamma$‐belite(010)–water interfaces have been studied by molecular dynamics simulations using a high‐dimensional neural network potential. The structure and reactivity of interfacial water have been analyzed and two types of surface defects could be identified, which indicate the possible existence of a wide range of surface structures ...
Bernadeta Prus, Jörg Behler
wiley   +1 more source

Valorização de fonte alternativa de sulfato de cálcio para a produção de argamassas autonivelantes [PDF]

, 2013
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2013A argamassa autonivelante é um material de baixa viscosidade constituído por aglomerante, areia, água e ...
Schaefer, Cecília Ogliari
core  

Chloride Resistance of Portland Cement-Based Mortar Incorporating High Aluminate Cement and Calcium Carbonate

, 2020
Whether chloride resistance is highly influenced by chloride binding capacity remains unknown. In this study, the chloride resistance of Portland cement-based mortar incorporating aluminate cement and calcium carbonate was investigated considering the ...
Seungmin Lim, Hanseung Lee, Yunsu Lee
core   +1 more source

Optimizing feather hydrolysate via machine learning for microbial recycling of waste concrete fines

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND The concrete industry faces significant challenges from CO2 emissions and the disposal of waste concrete fines (WCF). Microbially induced calcite precipitation (MICP) can bind WCF into bioconcrete, but the high cost of commercial culture media hinders its application.
Henrietta Ottová, Barbora Malíková, Václav Nežerka, Petr Holeček, Dana Koňáková, Hana Stiborová   +5 more
wiley   +1 more source

Polymaterial Lattice Discrete Particle Model for the Optimization of Lightweight Aggregate Concrete: Intragranular Fracture and Compression Behavior

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Lightweight aggregate concrete (LWAC) offers clear advantages for sustainable construction, including reduced density and improved thermal insulation. However, its mechanical and fracture behavior is difficult to characterize due to the heterogeneity and brittle crushing of porous lightweight aggregates.
Yuhui Lyu, Fan Zheng, Matthew Troemner, Erol Lale, Ke Yu, Dono Toussaint, Hailong Ye, Gianluca Cusatis   +7 more
wiley   +1 more source

Desenvolvimento de aglomerantes ecoeficientes com encapsulamento de metais pesados [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2014.A produção de aglomerantes para uso na construção civil gera impactos ambientais em vários países do ...
Manfroi, Eliz Paula
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