A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Accelerating Carbonation in Pervious Concrete for Improved Deicer Resistance
This paper investigates the possibility of treating pervious concrete to be more resistant to chemical attack by deicers, as the use of some deicers has been shown to be detrimental to concrete pavements and the potential reactions between the salts and the cement paste and aggregates are increased in pervious concrete, due to the large contact area inherent to the porous nature of the material. The treatment uses carbonate laden waters in order to accelerate carbonation and provide additional resistance to chemical attack by one specific deicer: magnesium chloride. Fifty pervious concrete cylindrical specimens received the same deicer applications, once a week, for 17 consecutive weeks, mimicking a severe wintertime. Some received treatments prior to the deicer applications and some did not. It was previously shown that the treatment seemed to reduce the compressive strength of some, but not all specimens. Further analyses of the effluent pH during deicer application also indicated little if any changes due to the treatment. However, from studies of the specimens post the compressive strength test, the treatments may have in fact impacted the compressive test capping and the rate of increase in mass during the magnesium chloride applications, therefore more research is needed. Natural carbonation appears to improve pervious concrete resistance to deicers, thus a longer curing period before the winter season is recommended.
Accelerating Carbonation in Pervious Concrete for Improved Deicer Resistance
This paper investigates the possibility of treating pervious concrete to be more resistant to chemical attack by deicers, as the use of some deicers has been shown to be detrimental to concrete pavements and the potential reactions between the salts and the cement paste and aggregates are increased in pervious concrete, due to the large contact area inherent to the porous nature of the material. The treatment uses carbonate laden waters in order to accelerate carbonation and provide additional resistance to chemical attack by one specific deicer: magnesium chloride. Fifty pervious concrete cylindrical specimens received the same deicer applications, once a week, for 17 consecutive weeks, mimicking a severe wintertime. Some received treatments prior to the deicer applications and some did not. It was previously shown that the treatment seemed to reduce the compressive strength of some, but not all specimens. Further analyses of the effluent pH during deicer application also indicated little if any changes due to the treatment. However, from studies of the specimens post the compressive strength test, the treatments may have in fact impacted the compressive test capping and the rate of increase in mass during the magnesium chloride applications, therefore more research is needed. Natural carbonation appears to improve pervious concrete resistance to deicers, thus a longer curing period before the winter season is recommended.
Accelerating Carbonation in Pervious Concrete for Improved Deicer Resistance
Almeida, Nara (author) / Haselbach, Liv (author)
International Conference on Transportation and Development 2020 ; 2020 ; Seattle, Washington (Conference Cancelled)
2020-08-31
Conference paper
Electronic Resource
English
Freeze-Deicer Salt Scaling Resistance of Concrete
| ASCE | 2010