To evaluate rolling load resistance for various floor finishes
Date Run:
06/30/2006
Experiment Procedure:
The moisture content at the time of testing will influence results due to the hydroscopic nature of the base materials.
Therefore, efforts must be taken to ensure that the moisture content and temperature remain constant during the evaluation period. Ideally, the sample floor should be kept at 65+/-1% relative humidity and 68+/-6 F.
During laboratory testing, conditions were measured at 64% relative humidity, and the temperature was 74.8 F).
The flooring material supplied was Hardwood flooring made from Red Oak. The boards were ¾” thick, 2 ¼” wide and cut into 8” sections.
Three coupons were coated with a supplied floor finish according to the manufacturers’ specifications. The finish was applied using a 1” Pure Bristle 1500 paint brush. To ensure proper coating application rates, the coatings were applied via pipettes to surface. Three coats were used for each floor finish as this was common number of coating layers suggested by the various manufacturers.
The first two coatings were allowed to dry for 2 hours prior to the application of the next coat. The second coat for the current process was allowed to dry overnight before the application of final coat. The Completed coupons were allowed to sit for a minimum period of 24 hours before performance evaluations were conducted.
Rolling Load Measurements made during the rolling load will reveal damage to the coupon surface from repeated rolling forces, simulating heavy castored loads such as beds, desks and appliances. Coupons were placed into a holding device and clamped to restrict movement of the coupon. A load sled was constructed using a wood plank and three castor wheels. The round, hard wheels were 2” in diameter and 1” wide. The sled was loaded with 200 pounds. Figure 3 shows the sled passing over the surface of the finished coupon.
Figure 3. Rolling Load Apparatus Ten passes (5 cycles) were completed and the three measurements were made along the path of the sled wheel. An additional 15 passes were made with three more measurements made. Following the 25 passes, another 25 passes were made with the deformation measurements. The averages for the three sets of passes were calculated. Any notable surface changes were recorded. The results for each floor finish were compared to the other finishes.
Trial Results:
Rolling Load Resistance
Coating
Coupon
# passes
Middle
End 1
End 2
Ave Microm
Middle
End 1
End 2
Ave Microm
CP
46
10
0.7634
0.7602
0.7646
0.7627
0.7564
0.7486
0.7572
0.7541
25
0.7536
0.7469
0.7524
0.7510
50
0.7501
0.7426
0.7513
0.7480
47
10
0.7647
0.7642
0.7645
0.7645
0.7498
0.7596
0.7570
0.7555
25
0.7472
0.7501
0.7509
0.7494
50
0.7452
0.7497
0.7487
0.7479
48
10
0.7550
0.7551
0.7550
0.7550
0.7524
0.7532
0.7507
0.7521
25
0.7496
0.7517
0.7504
0.7506
50
0.7513
0.7497
0.7494
0.7501
MCP
49
10
0.7663
0.7676
0.7601
0.7647
0.7527
0.7609
0.7552
0.7563
25
0.7500
0.7573
0.7531
0.7535
50
0.7499
0.7567
0.7517
0.7528
50
10
0.7574
0.7604
0.7632
0.7603
0.7567
0.7540
0.7581
0.7563
25
0.7552
0.7535
0.7581
0.7556
50
0.7510
0.7522
0.7578
0.7537
51
10
0.7626
0.7647
0.7628
0.7634
0.7580
0.7613
0.7600
0.7598
25
0.7550
0.7606
0.7523
0.7560
50
0.7521
0.7591
0.7577
0.7563
BO
52
10
0.7663
0.7638
0.7647
0.7649
0.7607
0.7592
0.7606
0.7602
25
0.7591
0.7576
0.7566
0.7578
50
0.7573
0.7565
0.7556
0.7565
53
10
0.7599
0.7607
0.7607
0.7604
0.7557
0.7565
0.7578
0.7567
25
0.7525
0.7547
0.7566
0.7546
50
0.7512
0.7533
0.7562
0.7536
54
10
0.7569
0.7598
0.7644
0.7604
0.7464
0.7526
0.7571
0.7520
25
0.7449
0.7500
0.7544
0.7498
50
0.7441
0.7479
0.7532
0.7484
BW
55
10
0.7684
0.7610
0.7680
0.7658
0.7507
0.7516
0.7525
0.7516
25
0.7497
0.7504
0.7510
0.7504
50
0.7494
0.7500
0.7509
0.7501
56
10
0.7684
0.7600
0.7656
0.7647
0.7592
0.7558
0.7548
0.7566
25
0.7552
0.7523
0.7506
0.7527
50
0.7550
0.7512
0.7498
0.7520
57
10
0.7671
0.7710
0.7642
0.7674
0.7576
0.7580
0.7599
0.7585
25
0.7550
0.7574
0.7590
0.7571
50
0.7539
0.7563
0.7589
0.7564
Summary Rolling Load Resistance
Floor Coating
10
25
50
Total Depression Depth
Rank
CP
0.0089
0.0036
0.0016
0.0141
4
MCP
0.0072
0.0024
0.0008
0.0104
1
BO
0.0086
0.0022
0.0012
0.0121
2
BW
0.0102
0.0022
0.0006
0.0130
3
Pro Finisher Water Based Sanding Sealer & Polyurethane
0.0041
0.0058
0.0084
0.0084
Success Rating:
A cleanliness study, addressing only various analytical techniques.
Conclusion:
The modified current practice resulted in the best resistance to the rolling load followed by the Bona Oil mix, then the Bona Water mix and lastly by the current practice.
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