Results 11 to 20 of about 49,103 (280)

Current knowledge of external sulfate attack [PDF]

Advances in Cement Research, 2015
This paper offers an update of the current understanding of sulfate attack, with emphasis on the sulfates present in an external water source percolating through, and potentially reacting with, the cement matrix.
ASTM, ASTM, Bonen D, Bonen D, Brown PW, BSI, BSI, Dunstan ER, Fernandez-Altable V, Freeman RB, Harrison WH, Haynes H, Hooton RD, Lafuma H, Leon Black, Locher FW, Mangat PS, Marchand J, Mark Whittaker, McMahon D, Mehta PK, Mehta PK, Ouyang C, Rilem, Skalny J, Skalny J, Verbeck GJ   +26 more
core   +3 more sources

Resistance to external sulfate attack - Comparison of two alkali-activated binders [PDF]

MATEC Web of Conferences, 2018
Durability of binders, mortars and concretes in aggressive environments is of crucial importance for their commercial application. In this paper the resistance to external sulfate attack of two different alkaliactivated binders (AABs), based either on ...
Komljenović Miroslav, Džunuzović Nataša, Nikolić Violeta   +2 more
doaj   +2 more sources

3D-Mesomechanical analysis of external sulfate attack in concrete [PDF]

, 2017
The present study focuses on degradation of concrete by external sulfate attack. The numerical model developed by the MECMAT/UPC group, incorporates coupled C-M analysis using a meso-mechanical approach with discrete cracking, using the MEF and zero ...
Carol, Ignacio, López Garello, Carlos María, Pérez, A., Riera Bayo, Celia   +3 more
core   +3 more sources

A Critical Review of Existing Test-Methods for External Sulfate Attack. [PDF]

Materials (Basel), 2022
External sulfate attack (ESA) of cementitious materials has been studied worldwide for a very long time. This physical/chemical interaction between sulfate ions and the cement hardened elements affects the long-term durability of concrete structures: cracking, spalling or strength loss of concrete structures.
Jabbour M, Metalssi OO, Quiertant M, Baroghel-Bouny V.   +3 more
europepmc   +4 more sources

Simulation of expansion in cement based materials subjected to external sulfate attack

Ain Shams Engineering Journal, 2014
The standard test for length change in hydraulic-cement mortars exposed to sulfate solution, ASTM C1012-95, has been widely used by researchers to study the sulfate resistance of cement based materials. However, there are deficiencies in this test method
O.A. Hodhod, G. Salama
doaj   +2 more sources

New Methods for Assessing External Sulfate Attack on Cement-Based Specimens

Applied Sciences
This paper presents two original methods for monitoring and evaluating concrete specimens/structures affected by external sulfate attack (ESA). The first is a drying method developed to assess the penetration depth of sulfate ions in a concrete structure,
Othman Omikrine Metalssi, Marc Quiertant, Mike Jabbour, Véronique Baroghel-Bouny   +3 more
doaj   +2 more sources

Microstructural Origins of Cement Paste Degradation by External Sulfate Attack. [PDF]

Constr Build Mater, 2015
A microstructure model has been applied to simulate near-surface degradation of portland cement paste in contact with a sodium sulfate solution. This new model uses thermodynamic equilibrium calculations to guide both compositional and microstructure changes.
Feng P, Garboczi EJ, Miao C, Bullard JW.
europepmc   +4 more sources

Resistance of Pastes from Carbonated, Low-Lime Calcium Silica Cements to External Sulfate Attack. [PDF]

Materials (Basel), 2023
This paper presents the results of a study on the evaluation of resistance of pastes from carbonated, low-lime calcium silica cements to external sulfate attack. The extent of chemical interaction between sulfate solutions and paste powders was assessed by quantifying the amount of species that leached out from carbonated pastes using ICP-OES and IC ...
Tokpatayeva R, Olek J, Sahu S.
europepmc   +3 more sources

Effect of Exposure Conditions on Mortar Subjected to an External Sulfate Attack. [PDF]

Materials (Basel)
This study aims to investigate the influence of exposure conditions on the behavior of mortar subjected to an external sulfate attack (ESA). Three different exposure conditions (full immersion, semi-immersion, and drying/wetting cycles) were tested on mortar prisms made with Portland cement and two w/c ratios (0.45 and 0.6).
Omikrine Metalssi O, Quiertant M, Jabbour M, Baroghel-Bouny V.   +3 more
europepmc   +3 more sources

The effect of external sulfate attack on concrete, mortar and cement paste [PDF]

, 2017
. The present work reports the results of an experimental campaign started two years ago and still ongoing, aimed to assess the behavior of different cementitious materials subject to external sulfate attack. To this purpose prismatic specimens of cement
Claudia, Comi, Cristina, Tedeschi, Nicola, Cefis   +2 more
core   +2 more sources