Effect of Surface Preparation on the Deicing Salt-Scaling Resistance of Concrete With and Without SCM: Laboratory and Field Performance in the Presence of Sodium Chloride Deicing Salt

2016 ◽  
Vol 5 (2) ◽  
pp. 20160029
Author(s):  
H. Yi ◽  
M. D. A. Thomas
Keyword(s):  
Sodium Chloride ◽  
Surface Preparation ◽  
Field Performance ◽  
Deicing Salt ◽  
Salt Scaling ◽  
Scaling Resistance ◽  
Effect Of Surface

Deicing salt scaling resistance of concrete incorporating supplementary cementing materials: laboratory and field test data

2008 ◽  
Vol 35 (11) ◽  
pp. 1261-1275 ◽  
Author(s):  
N. Bouzoubaâ ◽  
A. Bilodeau ◽  
B. Fournier ◽  
R. D. Hooton ◽  
R. Gagné ◽  
...  
Keyword(s):  
Field Evaluation ◽  
Outdoor Exposure ◽  
Test Procedures ◽  
Visual Evaluation ◽  
Deicing Salt ◽  
Supplementary Cementing Materials ◽  
Salt Scaling ◽  
Concrete Mixtures ◽  
Scaling Resistance ◽  
Made In

In this study, sidewalk sections were made in the field using seven concrete mixtures, applying a finishing and curing practice that is commonly used in Montréal, Canada. For each of the sidewalk sections, large slabs (1.2 m × 1.2 m) were cast from which specimens were cored and tested in the laboratory for determining their basic mechanical properties and deicing salt scaling resistance following ASTM C672 test procedures. Also, during the casting of the sidewalk, companion specimens were cast on site, using concrete from the same batch, and were subjected to the same tests as the “cored” specimens. The resistance to deicing salt scaling of these “laboratory specimens” was evaluated according to ASTM C672 and to BNQ NQ 2621–900 (2002 standard of the province of Quebec, Canada) test procedures. The results were compared with the performance of the sidewalk sections after four winters of outdoor exposure. The visual evaluation of the sidewalks after four winters has confirmed the severity of the ASTM C672 procedure and the adequateness of the BNQ procedure to better evaluate the deicing salt scaling resistance of concrete made with supplementary cementing materials (SCMs). The field evaluation should, however, continue for a longer period of time to increase the confidence in the BNQ test or to allow for changes as needed.

Surface Layer Parameter of Concrete in Relation to Deicing Salt Scaling Resistance

2014 ◽  
Vol 1000 ◽  
pp. 298-301 ◽  
Author(s):  
Jaroslav Urban ◽  
Michaela Kostelecká ◽  
Tomas Klecka
Keyword(s):  
Surface Layer ◽  
Porous Structure ◽  
Concrete Structure ◽  
Hardened Concrete ◽  
Deicing Salt ◽  
Salt Scaling ◽  
Layer Parameter ◽  
Concrete Mix ◽  
Gaseous Media ◽  
Scaling Resistance

The porous structure together with surface layer, made by the compaction of concrete mix designed and by the following treatment of concrete placed, has a decisive influence on the penetration of aggressive media into the inside of concrete structure. In principle, it influences the parameters of hardened concrete and the transport of liquid and gaseous media. The surface layer of concrete is contacted as the first with aggressive substances and is an entrance gate for unwanted ones.

Deicing salt scaling resistance of concrete incorporating fly ash and (or) silica fume: laboratory and field sidewalk test data

2011 ◽  
Vol 38 (4) ◽  
pp. 373-382 ◽  
Author(s):  
N. Bouzoubaâ ◽  
A. Bilodeau ◽  
B. Fournier ◽  
R.D. Hooton ◽  
R. Gagné ◽  
...  
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Blended Cement ◽  
Field Evaluation ◽  
Concrete Mixture ◽  
Test Procedures ◽  
Deicing Salt ◽  
Salt Scaling ◽  
Curing Compound ◽  
Scaling Resistance

Sidewalk sections were cast in fall 2002 with three concrete mixtures that consisted of a control concrete, a concrete mixture incorporating 25% fly ash, and a concrete mixture made with a ternary blended cement (fly ash and silica fume). The curing practices consisted of using curing compound and wet burlap. For each of the sidewalk sections, laboratory specimens were cast on site using the concrete from the same batch. Large slabs (1.2 m × 0.9 m) were also cast from which specimens could be cored and tested in the laboratory for compressive strength and deicing salt scaling resistance following the ASTM and the BNQ test procedures. The results were compared to the performance of the sidewalk sections after six winters of outdoor exposure. A similar study was completed on sidewalk sections cast in spring 2002; the objective of the present study being to confirm the results of the previous investigation, and to determine the effect of the time of casting on the scaling resistance of the concrete i.e., performance of sidewalks cast in spring versus that of sidewalks cast in fall. The field evaluation showed that all the concretes cast in fall scaled relatively more than those placed in spring. Both laboratory results and field evaluations have shown that the use of a curing compound increases the scaling resistance of all the concretes investigated. The results also confirmed the adequateness of the BNQ procedure to better evaluate the deicing salt scaling resistance of concrete made with supplementary cementing materials; however, monitoring the sidewalk sections for a longer period of time is still required to confirm the above observations.

Effect of surface preparation of ABM-1 alloy on properties of glued joints

2009 ◽  
Vol 2 (2) ◽  
pp. 124-126
Author(s):  
L. I. Anikhovskaya ◽  
V. S. Kas’kov ◽  
E. A. Kuznetsova ◽  
L. P. Kozlova
Keyword(s):  
Surface Preparation ◽  
Glued Joints ◽  
Effect Of Surface
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