Results 211 to 220 of about 43,072 (255)

Sulfate Attack and the Role of Cement Compositions

Journal of the Korean Ceramic Society, 2007
This paper presents an experimental study of the sulfate resistance of mortars and pastes exposed to sodium sulfate solutions up to one year. In order to check deterioration modes due to sulfate attack, the sodium sulfate solution was varied at three concentration steps (3,380, 10,140 and 33,800 ppm of SO₄²? ions), and maintained at ambient temperature.
Seung-Tae Lee, Seung-Heun Lee
openaire   +1 more source

Sulfate Attack on Cement-Stabilized Sand

Journal of Geotechnical and Geoenvironmental Engineering, 1999
A 3.5-km (2.2 mi) section of a road in Georgia developed unexpected transverse bumps within 6 months after construction. The source of the bumps appeared to be expansion within the cement-stabilized base course. Laboratory examination of samples from areas showing distress revealed the presence of ettringite, a calcium sulfoaluminate the formation of ...
Raymond S. Rollings, J. Pete Burkes, Marian P. Rollings   +2 more
openaire   +1 more source

Sulfate attack on concrete with mineral admixtures

Cement and Concrete Research, 1996
Abstract The sulfate resistance of concretes containing fly ash, natural pozzolan and slag is investigated in a field test in which concrete specimens were half-buried in sulfate soil for five years. Mineral admixtures were used as a partial replacement for ordinary portland cement (C3A = 8.5%), and the progress of sulfate attack was evaluated by ...
E.F. Irassar, A. Di Maio, O.R. Batic
openaire   +1 more source

Ettringite Formation and Sulfate Attack on Concrete

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference", 2001
The paper presents a critical review of the relationship between ettringite formation and sulfate attack. Ettringite formation is associated with expansion. However, any ettringite-related expansion is not necessarily related to sulfate attack. Early ettringite formation (EEF) which occurs immediately (within hours) in a plastic fresh mixture does not ...
openaire   +1 more source

Evaluating deterioration of concrete by sulfate attack

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2007
Effects of factors such as water to cement ratio, fly ash and silica fume on the resistance of concrete to sulfate attack were investigated by dry-wet cycles and immersion method. The index of the resistance to sulfate attack was used to evaluate the deterioration degree of concrete damaged by sulfate.
Guangcheng Long, Youjun Xie, Xuguang Tang   +2 more
openaire   +1 more source

Sulfate attack on hardened cement paste

Cement and Concrete Research, 1994
Hardened cement paste specimens made with fifferent cement types and varying water-cement ratios (w/c) were immersed in 5% sodium sulfate solution maintained at constant pH value of 6. The distribution curves for ettringite, gypsum, and portlandite phases were obtained by using layer by layer XRD analysis and interpreted in terms of material damage due
openaire   +1 more source

Mechanism of sulfate attack: a fresh look

Cement and Concrete Research, 2002
Manu Santhanam, Menashi D Cohen, Jan Olek   +2 more
openaire   +1 more source

Improving the sulfate attack resistance of concrete by using supplementary cementitious materials (SCMs): A review

Construction and Building Materials, 2021
Ashish Kumer Saha, Prabir Sarker, Christopher Shearer   +2 more
exaly  

Cement composition and sulfate attack

Cement and Concrete Research, 2007
Natalya Shanahan, Abla Zayed
openaire   +1 more source

Effects of pH on the nano/micro structure of calcium silicate hydrate (C-S-H) under sulfate attack

Cement and Concrete Research, 2021
Yun Gao, Pan Feng, Xin Liu
exaly