scholarly journals Effects of Cement Type and Fly Ash on the Sulfate Attack Using ASTM C 1012

2004 ◽  
Vol 16 (1) ◽  
pp. 130-138
Author(s):  
Nam-Shik Ahn
Keyword(s):  
Fly Ash ◽  
2011 ◽  
Vol 99-100 ◽  
pp. 420-425 ◽  
Author(s):  
Qian Rong Yang ◽  
Xiao Qian Wang ◽  
Hui Ji

The strength, expansion and amount of scaling of concrete with compound mineral admixture (CMA) from steel slag, granulated blast furnace slag and fly ash were studied. The result shows that damage by crystallization press from sulfate attack when concrete was exposed to sulfate environments under wetting–drying alternation is much larger than that from sulfate chemical attack. Adding CMA to concrete could reduce the damage from expansion of concrete caused by sulfate chemical attack, but the resistance of concrete to damage by crystallization press from sulfate attack was remarkably reduced.


2020 ◽  
Vol 32 (9) ◽  
pp. 04020246
Author(s):  
Rimvydas Kaminskas ◽  
Vytautas Cesnauskas ◽  
Irmantas Barauskas

2011 ◽  
Vol 295-297 ◽  
pp. 165-169
Author(s):  
Guan Guo Liu ◽  
Jing Ming ◽  
Xiong Wen Zhang ◽  
Ai Bin Ma

Sulfate attack is one of several chemical and physical mechanisms of concrete deterioration. In actual situation, concrete structures always suffer from the coupled effects of multifactor such as wet-dry cycle and sulfate attack when exposed to tidal area or groundwater level change environment. Partial replacement of cement with mineral admixture is one of the efficient methods for improving concrete resistance against sulfate attack. In this regard, the resistance of concrete with fly ash and slag to sulfate attack was investigated by wet-dry cycle method. The degree of sulfate attack on specimens after different cycles was observed using scanning electron microscopy. The results of compressive strength and percentage of compressive strength evolution factor at various cycling times show an increase in the sulfate resistance of concrete with 60% of fly ash and slag than that only with 40% fly ash. The microstructural study indicates that the primary cause of deterioration of concrete under wet-dry cycle condition is swelling of the sulfate crystal rather chemical attack.


2020 ◽  
Vol 72 (3) ◽  
pp. 134-148 ◽  
Author(s):  
Meng Wu ◽  
Yunsheng Zhang ◽  
Yongsheng Ji ◽  
Guojian Liu ◽  
Wei She ◽  
...  

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