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DLG-APPROVED Single value-determining criteria
A quality mark “DLG-APPROVED for single value-determining criteria” is awarded to agricultural products which successfully passed a smaller-scope DLG usability test according to independent and recognized evaluation criteria. The test intends to highlight special innovations and key criteria of the test item. The test can focus on criteria from the DLG testing framework for full tests or on other individual features or qualitative criteria. The minimum requirements, the test conditions and procedures as well as the evaluation guidelines of the test results are determined in consultation with a DLG expert group. They comply with the generally recognized technology rules as well as with scientific and agricultural knowledge and requirements. The successful test concludes with the publishing of a test report and the awarding of a quality mark which is valid for five years following the award date.
The DLG Approved Test “Deformability/Elasticity, Permanent Tread Load, Abrasion, Slip resistance, Acid resistance, Cleaning distance” includes technical measurements on test stands of the DLG Test Center. The deformability and elasticity, the abrasion resistance, the slip resistance, the acid resistance, the cleaning distance were measured and a permanent tread load was applied. The test was based on the DLG Testing Framework for elastic stable flooring, as at April 2010. Other criteria were not investigated.
The Animat walking way cover Interlock tested here, an elastic floor for walking ways in cubicle houses, was investigated with regard to durability and comfort properties on test stands in the DLG Approved Test. The deformability and elasticity, the abrasion resistance, the slip resistance, the cleaning distance, the acid resistance were measured and a permanent tread load was applied. The deformability and elasticity in new condition and following permanent tread load were better than standard.
|Test characteristic||Test result||Evaluation*|
|Deformability and elasticity|
|– in new condition||1.7 mm, good||+|
|– following endurance test||1.8 mm, good||+|
|Permanent tread load|
|no lasting deformation||++|
|surface no appreciable wear||+|
|groves on the bottom little wear||◯|
|good wear resistance||+|
|good slip resistance on dry and wet mattress surface||+|
|Feed acid mixture||resistant||+|
|with flat jet nozzle||5 cm||++|
|with a coarse dirt remover||50 cm||◯|
Walking way cover Interlock
The Animat walking way cover Interlock tested here, is an elastic floor for walking ways in cubicle houses.
Black, profiled rubber mat
- ca. 20 mm thick
- surface with a hammer stroke structure
- underside with grooves
- height ca. 1 mmm
- width ca. 4 mm
- space between the grooves ca. 4 mm
- Shore A hardness: 70
- laid as single mat
Deformability and elasticity
The deformability is measured in new condition and following permanent tread load with a round steel foot (diameter of 105 mm and therefore a contact area of 75 cm²) and a penetration force of 2,000 N (corresponding to approx. 200 kg).
Permanent tread load
The permanent tread load is measured on a test stand with a round steel foot in the standard test programme with 250,000 alternating loads at 5,000 N (corresponding to approx. 500 kg). The steel foot is adapted to the natural conditions as an “artificial cow foot”. The foot has a diameter of 105 mm and therefore a contact area of 75 cm²; the carrying edge of the hoof is simulated by a 5 mm wide ring on the periphery of the sole that projects 1 mm above the rest of the surface.
In a standardised abrasion test with 10.000 cycles the top cover was grinded with an emery cloth (granulation 280) and a grinding pressure of 500 N (= 8.1 N/cm² surface pressure). The friction element was cooled continuous with water to prevent an influence of the generated heat during the abrasion test. The size of the grinded area was 61,5 cm².
The measurements were carried out with the ComfortControl test rig of the DLG test centre. A loaded (10 kg) round plastic foot (105 mm diameter, with a contact area of 70 cm², 3 mm wide ring at the periphery of the ground) was pulled with a velocity of 20 mm/s across the mat.
A permanent dipping test in accordance to DIN EN ISO 175:2000 (performance of synthetic material against liquid chemicals) was carried out. Test samples (size 30 mm x 30 mm) were completely dipped into different test liquids for 24 hours and 28 days (room temperature 20° Celsius). In the 28 days test the liquids were changed weekly. After the 28 days the samples were washed with distillate water and dried for 24 hours. Before and after the dipping the weight, the dimensions and the shore hardness (shore A) of the test samples were measured. Additional visual evaluation was done for alterations like colour changing, swelling, destruction or crystallisation. All samples were evaluated in comparison to the standard water.
In test stand trials with a high pressure cleaner (approximately 145 bar, exposure period 1 minute with a 25° flat jet nozzle and a coarse dirt remover) the distance was measured where no damage occurs.
Deformability and elasticity
In the penetration test in new condition with a round steel foot (artificial cow´s foot) having a diameter of 105 mm (contact area 75 cm², with a 5 mm wide ring at the periphery of the sole, which projects 1 mm over the rest of the surface (carrying edge of the claw)) and a penetration force of 2.000 N (corresponding to ca. 200 kg), penetration depth was 1.7 mm. This results in a calculated surface pressure of 26.67 N/cm². Elasticity was measured after the mat had been exposed to a permanent tread load exerted by the steel foot (250.000 alternating loads of 5.000 N). After the endurance test, the penetration depth of the mat increased to 1.8 mm (see Fig. 2). Evaluation see Table 1.
Permanent tread load
After the mat had been exposed to a permanent tread load exerted with 250.000 alternating loads of 5.000 N (corresponding to ca. 500 kg), the mat showed no appreciable wear on the surface and little wear on the grooves. Lasting deformation could not be observed. Evaluation see Table 1.
The abrasion depth after 10,000 cycles amounted to 2.0 mm, this corresponds to approximately 10 % of the mat thickness. Of the ground surface 10.4 grams were rubbed off. Evaluation see Table 1.
The slide pulling tests showed a good slip resistance on the dry or wet mat surface in new condition. The measured friction coefficients (μ) all surpassed the minimal value of μ = 0.45 which speaks for a good foothold. Evaluation see Table 1.
Because of the resistance against the used feed- and excrement acids and the used disinfection liquid the rubber mat seems to be well suited for the described use. The rubber mat was resistant against the used test liquids. The rubber mat shows no appreciable changing. Evaluation see Table 1.
In test stand trials with a high pressure cleaner damage to the mat only occurred when a minimum distance of 50 cm (with a coarse dirt remover) and 5 cm (with a
flat-jet nozzle) was not kept. For cleaning and disinfection of the floor cover, only the cleaning agents permitted by the manufacturer should be used. Evaluation see Table 1.
|Test liquid||concentration||result after 24 hours residence time||result after 28 days residence time||Evaluation|
|Feed acid mixture|
|concentrate, pH 2||no changing||no changing||resistant|
|Uric acid||saturated urea solution (0,4%)||no changing||no changing||resistant|
|Sulfurous acid||5-6 % SO2||no changing||little colour changing (light colored spots on the surface)||resistant|
|Ammonia solution||32% solution||no changing||no changing||resistant|
|Barn Disinfection liquid||2%-solution of a product with formic acid and glyoxyl acid||no changing||no changing||resistant|
Based on test-stand investigations, the criteria tested in this DLG Approved Test evaluate the comfort and durability properties of the Animat walking way cover Interlock for use in the walking ways in cubicle houses. The tested Animat walking way cover Interlock met the requirements of the Testing Framework with respect to the investigated criteria.
Technology and Farm Inputs,
DLG Testing Framework
DLG Approved Test
“Elastic Stable Flooring”
(as at 04/2010)
Dipl.-Ing. Susanne Gäckler
Dr. Harald Reubold *
* Reporting engineer