Results 261 to 270 of about 62,299 (282)

The Development of Accelerated Test Method for Internal Sulfate Attack by Delayed Ettringite Formation

Materials Science Forum, 2020
Delayed Ettringite Formation (DEF) is an internal sulfate attack caused by heat-induced decomposition and/or prevention of normal ettringite formed during the initial hydration of cement at elevated temperature (above about 70°C) and its re-crystallization in the hardened matrix.
Van Huong Nguyen, Nordine Leklou, Pierre Mounanga   +2 more
openaire   +1 more source

A microstructural hydration model for cemented paste backfill considering internal sulfate attacks

Construction and Building Materials, 2019
Abstract Cemented paste backfill (CPB) is a type of cementitious material produced with tailings, cement, and water. Typically, CPB has a high proportion of tailings (75–80 wt%), which may contain a large amount of sulfide minerals that can cause serious attacks in the CPB system.
Lang Liu, Chao Zhu, Chongchong Qi, Bo Zhang, Ki-Il Song   +4 more
openaire   +1 more source

Development of accelerated test methods by electromigration to assess the risk of internal sulfate attack in heat-cured mortar and concrete

Construction and Building Materials
Pierre Mounanga
exaly   +2 more sources

Consecutive pozzolanic layerings to depress internal-sulfate-attack corrosion of OPC by phosphogypsum-based cold bonded aggregates

Corrosion Science
Gaoshang Ouyang, Tao Sun, Ziyan Wang, Baicong Lu, Minglong Chen, Zhenlin Mo, Liwei Guo   +6 more
exaly   +2 more sources

Internal Sulfate Attack: Distress Mechanism at Ambient and Elevated Temperatures?

"SP-177: Ettringite, the Sometimes Host of Destruction", 1999
Recent debate on delayed ettringinte formation (DEF) as a form of internal sulfate attack -- a distress mechanism for ambient- and steam-cured concrete -- has motivated this paper, which examines relevant data from the literature and from the author's laboratory.
openaire   +1 more source

Behavior of High Performance Concrete Exposed to Internal Sulfate Attack (Gypsum-Contaminated Aggregate)

Earth & Space 2006, 2006
Contamination of aggregates with sulfate salts (especially gypsum) is a major problem in Middle East concrete construction. Fine aggregate has more detrimental effect due to its large surface area (fineness). An experimental work had carried out to investigate the behavior of high performance concrete exposed to internal sulfate attack in comparison ...
Tariq S. Al-Attar, Alaa M. Al-Khateeb, Abid H. Bachai   +2 more
openaire   +1 more source

Mitigation potential of sulfate-resistant Portland cement for internal sulfate attack

Journal of Building Pathology and Rehabilitation, 2021
Laura P. M. Camanducaia, Nathalia C. S. Santos, Ronaldo A. Medeiros-Junior   +2 more
openaire   +1 more source

Evaluation of the Potential for Internal Sulfate Attack Through Adaptation of ASTM C 342 and the Duggan Test

Cement, Concrete, and Aggregates, 1999
Abstract The potential for distress resulting from internal sulfate attack in mortars was evaluated using a test method adapted from ASTM Test Method (C 342) and the Duggan test. While these test procedures were originally developed to evaluate the potential for cement-aggregate combinations to undergo deleterious alkali-aggregate ...
DS Lane, HC Ozyildirim
openaire   +1 more source

International RILEM Workshop on Internal Sulfate attack and Delayed Ettringite Formation

Materials and Structures, 2004
K. Scrivener, J. Skalny
openaire   +1 more source

Effect of crystalline admixture and polypropylene microfiber on the internal sulfate attack in Portland cement composites due to pyrite oxidation

Construction and Building Materials, 2021
Eduardo Pereira, Ronaldo A Medeiros-Junior   +1 more
exaly