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Frontiers of Structural and Civil Engineering

Front. Struct. Civ. Eng.    2016, Vol. 10 Issue (4) : 385-393     https://doi.org/10.1007/s11709-016-0351-0
RESEARCH ARTICLE
Testing development of different surface treatments on pervious concrete
Mina YEKKALAR,Liv HASELBACH(),Quinn LANGFITT
Civil and Environmental Engineering, Washington State University, Pullman WA 99164-2910, USA
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Abstract

Pervious concrete systems are developing stormwater management technologies which also have wintertime benefits as melting snow may percolate into the system instead of refreezing on the surface. Enhancing the surface microtexture of pervious concrete may also be beneficial in preventing icing or slipping by pedestrians. This research explored different surface treatments on pervious concrete specimens both qualitatively from personal judgements, and quantitatively through static friction measurements with a spring balance with respect to “slipperiness”. The tests were performed on both dry and wet specimens. One aim was to determine whether the spring balance method may be a simple test for comparing surface treatments on pavement samples with little surface area such as laboratory specimens or sidewalk sections. The other purpose was to make a preliminary decision of which surface treatments to use for a sidewalk installation for future studies on wintertime performance. The reliability analysis of the spring balance results showed that there was high operator consistency. In addition, there was a high level of consistency on average results between the quantitative and qualitative methods. This implies that the spring balance test may be an acceptable methodology for comparative analyses with respect to static friction.

Keywords pervious concrete      static coefficient of friction      pedestrian     
Corresponding Author(s): Liv HASELBACH   
Online First Date: 04 November 2016    Issue Date: 29 November 2016
 Cite this article:   
Mina YEKKALAR,Liv HASELBACH,Quinn LANGFITT. Testing development of different surface treatments on pervious concrete[J]. Front. Struct. Civ. Eng., 2016, 10(4): 385-393.
 URL:  
http://journal.hep.com.cn/fsce/EN/10.1007/s11709-016-0351-0
http://journal.hep.com.cn/fsce/EN/Y2016/V10/I4/385
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Mina YEKKALAR
Liv HASELBACH
Quinn LANGFITT
Fig.1  Photographs of five surface treatments
surface treatment description specimen porosity (%) infiltration rate (m/hr)
broom broom finishing applied after compaction broom 1 20 30
broom 2 20 30
pre-sand 20 g fine sand applied before compaction pre-sand 1 27 35
pre-sand 2 25 37
coating sealant mixture applied after curing coating 1 27 48
coating 2 25 42
post-sand 20 g fine sand applied after compaction post-sand 1 23 38
post-sand 2 26 37
control no treatment after compaction control 1 32 37
control 2 26 42
Tab.1  Summary of specimens and results of porosity and infiltration tests
Fig.2  Schematic view of spring balance procedure
Fig.3  Result summary of spring balance tests conducted by three operators
Fig.4  Result summary of qualitative evaluation
Fig.5  Average normalized results for both methods under dry conditions
Fig.6  Average normalized results for both methods under wet conditions
location description ranked scores
specimen location surface condition operator 1 operator 2 operator 3
broom 1 location 1 dry 39 38 37
wet 36 33 40
location 2 dry 37 35 39
wet 34 32 38
pre-sand 1 location 1 dry 25 24 12
wet 32 29 30.5
location 2 dry 38 34 33
wet 28 12 27
coating 1 location 1 dry 5 11 7
wet 17 2 9
location 2 dry 4 10 14
wet 7.5 3 2
post-sand 1 location 1 dry 40 40 20
wet 31 23 24
location 2 dry 27 39 36
wet 25 7 34
control 1 location 1 dry 18 25 16
wet 13 17 10
location 2 dry 15 16 26
wet 11.5 9 21
broom 2 location 1 dry 21 27 19
wet 9 20 3.5
location 2 dry 14 28 13
wet 6 13.5 15
pre-sand 2 location 1 dry 16 19 32
wet 10 13.5 28.5
location 2 dry 19 15 35
wet 23 6 28.5
coating 2 location 1 dry 3 22 3.5
wet 1 4 6
location 2 dry 7.5 5 5
wet 2 1 1
post-sand 2 location 1 dry 35 37 17
wet 25 30 8
location 2 dry 21 31 30.5
wet 11.5 18 22
control 2 location 1 dry 21 21 23
wet 30 8 18
location 2 dry 29 36 25
wet 33 26 11
Tab.2  Summary of reliability analysis on operational results for the quantitative test
description rank rank with ties averaged
specimen surface condition spring balance qualitative spring balance qualitative
broom 1 dry 1 1 1.5 1.5
wet 1 1 1.5 1.5
pre-sand 1 dry 8 7 8 7
wet 6 13 6 13
coating 1 dry 17 16 17 16
wet 18 19 18 19
post-sand 1 dry 3 3 3 3.5
wet 9 9 9 9
control 1 dry 14 11 14 11
wet 15 18 15 18
broom 2 dry 13 5 13 5.5
wet 16 10 16 10
pre-sand 2 dry 5 8 5 8
wet 4 15 4 15
coating 2 dry 19 17 19 17
wet 20 20 20 20
post-sand 2 dry 7 5 7 5.5
wet 11 12 11 12
control 2 dry 10 3 10 3.5
wet 12 14 12 14
Tab.3  Summary of reliability analysis on the two methods
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