Freeze/thaw durability of concrete with recycled demolition aggregate compared to virgin aggregate concrete

Capillary water absorption of concrete is closely related to its pore structure, permeability, and durability. This paper intensively investigates the effects of imposed damage, including freeze-thaw damage and loading damage, on the capillary water absorption of recycled aggregate concrete (RAC). Freeze-thaw cycle test, loading test, and the experiment of capillary water absorption were carried out, respectively. The results demonstrate that the addition of recycled coarse aggregate (RCA) results in the increase in the capillary absorption behavior of RAC without imposed damage, and there exists a linear correlation between the behaviors of capillary water absorption and chloride penetration of RAC. The imposed freeze-thaw damage or load damage of RAC boosts with the increase of RCA replacement percentages after suffering the same freeze-thaw cycles or loading level. The imposed freeze-thaw damage and load damage further lead to the increase in the capillary water absorption of RAC, and the capillary absorption coefficient of RAC increases linearly with the increased RCA replacement percentages, after suffering the same freeze-thaw cycles or loading level. Furthermore, capillary absorption coefficient increases linearly with the growth of imposed freeze-thaw damage or load damage degree, which can be used to estimate the capillary absorption behavior of RAC exposed to the extreme environment.

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The effect of the pre-wetting of expanded clay aggregate on the freeze-thaw resistance of the expanded clay aggregate concrete

Studia Geotechnica et Mechanica ◽

10.2478/sgem-2020-0011 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Michał Piotr Musiał ◽

Filip Grzymski ◽

Tomasz Trapko

Keyword(s):

Compressive Strength ◽

Moisture Content ◽

Concrete Compressive Strength ◽

Aggregate Concrete ◽

Freeze Thaw ◽

Concrete Mix Design ◽

In Series ◽

Resistance Criterion ◽

Mixing Water ◽

Nominal Amount

AbstractThis paper presents experimental research on expanded clay aggregate concrete. The aim of the investigations was to determine if the pre-wetting of expanded clay aggregate has an effect on the freeze-thaw durability of the expanded clay aggregate concrete. Five concrete series based on the same concrete mix design were made and tested. The degree of pre-wetting of the aggregate was varied: dry aggregate was used in the first series, aggregate with a moisture content of 10% was used in series IA and IB and aggregate with a moisture content of 25% was used in series IIA and IIB. Also the approach to the production process was varied: in series A the water contained in the aggregate was taken into account in the global water-cement ratio (consequently a reduced amount of water was added to the mix), whereas in series B the nominal amount of water was added to the mix (as in the case of dry aggregate). The freeze-thaw resistance criterion was based on the assessment of the decrease of compressive strength and increase in weight loss after exposure to freeze-thaw cycles. The expanded clay aggregate concrete's strength and mass decrements caused by freeze-thaw cycling were used as the measure of its freeze-thaw resistance. The investigations have shown that the pre-wetting of expanded clay aggregate has an effect on the freeze-thaw durability of the expanded clay aggregate concrete. The differences of concrete compressive strength decrease related to freeze-thaw durability may be 2 to 5 times greater when inadequate method of calculating mixing water for concrete is used.

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Enhancing the Freeze-Thaw Durability of Concrete Through Ice Recrystallization Inhibition by Poly(vinyl Alcohol)

10.26434/chemrxiv.11363843 ◽

2019 ◽

Author(s):

Zhengyao Qu ◽

Shuaiqi Guo ◽

Christian C. M. Sproncken ◽

Romà Surís-Valls ◽

qingliang yu ◽

...

Keyword(s):

Mechanical Properties ◽

Vinyl Alcohol ◽

Cement Hydration ◽

Poly Vinyl Alcohol ◽

Seasonal Temperature ◽

Ice Recrystallization Inhibition ◽

Ice Recrystallization ◽

Freeze Thaw ◽

Recrystallization Inhibition ◽

Durability Of Concrete

Frost weathering of porous materials caused by seasonal temperature changes is a major source of damage to the world’s infrastructure and cultural heritage. Here we investigate poly(vinyl alcohol) (PVA) addition as a means to enhance the freeze-thaw durability of concrete without compromising its structural or mechanical integrity. We evaluate the ice recrystallization inhibition activity of PVA in a cementitious environment and the impact of PVA on key structural and mechanical properties, such as cement hydration (products), microstructure, strength, as well as freeze‑thaw resistance. We find that a low amount of PVA significantly reduces the surface scaling of concrete and displays excellent ice recrystallization inhibition in the saturated Ca(OH)<sub>2 </sub>solution which has a similar pH value as cement pore solution, while it does not affect cement hydration, microstructure, nor its mechanical properties. These findings contribute to new insights on freeze-thaw damage mechanism and more importantly we disclose a new direction for the design of concrete with excellent freeze‑thaw resistance.

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Durability of concrete under sulfate attack exposed to freeze–thaw cycles

Cold Regions Science and Technology ◽

10.1016/j.coldregions.2014.12.006 ◽

2015 ◽

Vol 112 ◽

pp. 112-117 ◽

Cited By ~ 41

Author(s):

Lei Jiang ◽

Ditao Niu ◽

Lidong Yuan ◽

Qiannan Fei

Keyword(s):

Sulfate Attack ◽

Freeze Thaw ◽

Durability Of Concrete

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The porous aggregate pre-soaking in relation to the freeze–thaw resistance of lightweight aggregate concrete

Construction and Building Materials ◽

10.1016/j.conbuildmat.2011.12.067 ◽

2012 ◽

Vol 30 ◽

pp. 761-766 ◽

Cited By ~ 12

Author(s):

B. Kucharczyková ◽

Z. Keršner ◽

O. Pospíchal ◽

P. Misák ◽

P. Daněk ◽

...

Keyword(s):

Lightweight Aggregate ◽

Lightweight Aggregate Concrete ◽

Aggregate Concrete ◽

Freeze Thaw

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Review on the deterioration and approaches to enhance the durability of concrete in the freeze–thaw environment

Construction and Building Materials ◽

10.1016/j.conbuildmat.2022.126371 ◽

2022 ◽

Vol 321 ◽

pp. 126371

Author(s):

Ruijun Wang ◽

Zhiyao Hu ◽

Yang Li ◽

Kai Wang ◽

Hao Zhang

Keyword(s):

Freeze Thaw ◽

Durability Of Concrete

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Effect of silica fume on durability of concrete composites containing fly ash

Science and Engineering of Composite Materials ◽

10.1515/secm-2012-0081 ◽

2013 ◽

Vol 20 (1) ◽

pp. 57-65 ◽

Cited By ~ 8

Author(s):

Peng Zhang ◽

Qing-fu Li

Keyword(s):

Fly Ash ◽

Silica Fume ◽

Shrinkage Strain ◽

Carbonation Depth ◽

Freeze Thaw ◽

Slump Flow ◽

Carbonation Resistance ◽

Dry Shrinkage ◽

Shrinkage Property ◽

Durability Of Concrete

AbstractIn this paper, the effect of silica fume on the workability and durability of concrete composites containing fly ash, including water impermeability, dry shrinkage property, carbonation resistance and freeze-thaw resistance, are presented. Four different silica fume contents (3%, 6%, 9% and 12%) were used. The results indicate that the addition of silica fume has greatly improved the durability of water impermeability, the carbonation resistance and the freeze-thaw resistance of the concrete composites containing fly ash. With the increase in silica fume content, the length of water permeability and the carbonation depth of the specimens decrease gradually, and the relative dynamic elastic modulus of the specimens has a tendency to increase. However, the addition of silica fume has a little adverse effect on the workability and dry shrinkage property of concrete composites containing fly ash. With the increase in silica fume content, both the slump and the slump flow decrease gradually, and the dry shrinkage strain increases gradually.

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