DLG e.V. - Test: Blister Sandbedmat (Acid resistance, Joint evaluation)

Blister Sandbedmat Acid resistance, Joint evaluation

Assessment – Brief Summary

The Blister sandbedmat tested here, a system for building a resting area in cubicles in cubicle houses, was tested as a system with a rubbermat filled with sand and organic litter with regard to durability and comfort properties. The the acid resistance was measured and joint evaluation was carried out. The joint evaluation was clearly better than the standard.

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Table 1: Overview of results

Test characteristic Test result Evaluation
Acid resistance*
Feed acid mixture resistant +
Uric acid resistant +
Sulfurous acid resistant +
Ammonia solution resistant +
Disinfection liquid resistant +
Peracetic acid resistant +
Joint evaluation** no alteration 96,4 % + +

*    Evaluation range:  + = resistant;  ◯ = imited resisitant;  – = not resisitant
**    Evaluation range: + + / + / ◯ / – / – – (◯ = standard)

The Product

Blister sandbedmat

Description and Technical Data

The Blister sandbedmat tested here, is a system for building a lying area in cubicle barns for cows and cattle.

  • Black Rubber sandbedmat with 35 quadratic chambers ca. 20 x 20 cm, which are filled with sand. The surface of the sandbedmat should be interspersed with ca. 5 cm straw litter.
  • Dimensions: length 154 cm, width 114 cm, high 11 cm
  • weight 50 kg each mat
  • Shore A: 75
  • The sanbedmats are fixed with 13 screws plus disks and dowel on the anchoring supports on the floor.

Figure 2: Drawing of the sandbedmat

Figure 3: Blister Sandbedmat with sand

Figure 4: Blister Sandbedmat (litter removed to see the mat) and straw litter

The Method

Acid resistance

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.

Joint evaluation

On three farms which had installed only the tested sandbedmat, cows were examined for externally visible damage in the joint area as of the second third of lactation (joint evaluation).
Evaluation comprised the left and right half of the body and focused on the 10 spots exposed during resting (cf. figure 6). Joint evaluation was always carried out by the same person at the end of the winter feeding period.  The results were classified accor­ding to the following scheme (table 2)

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Table 2: Classification of the joint evaluation

Result Classification
without any particular result no alterations
hairless spots < 2 cm small alterations
hairless spots > 2 cm small alterations
skin abrasions < 2 cm medium alterations
skin abrasions > 2 cm medium alterations
increased circumference in the bursal area, covered medium alterations
increased circumference in the bursal area, open great alterations
joint participation great alterations

The Test Results in Detail

Acid resistance

The material of the sandbedmat was resistant to the tested media. The sandbedmat mat appears to be suitable for the described purpose as it exhibits material resistance to the tested media.  

Joint evaluation

On three farms which had installed only the tested cow mattress, a total of 105 cows were examined for externally visible damage in the joint area as of the second third of lactation (joint evaluation). Evaluation comprised the left and right half of the body and focused on the 10 spots exposed during resting. Joint evaluation was always carried out by the same person. In two farms straw litter was used on the Blister sandbedmat. On one farm pellets made of husk were used as litter.

The percentage of the results found in the 105 animals examined is shown in figure 7. 96.4 % of the spots evaluated did not show any pathological result. Great alterations, like increased circumference in the bursal area, open joint participation were not found.

Small alterations, such as hairless spots were found at 2.6 % of the spots evaluated. At 1.0 % of the spots evaluated  medium alterations, such as skin abrasions and increased circumference in the bursal area (covered) at the joints were found. The pathological results determined were mainly found in the tarsal joint. Only in a few cases were pathological results found in the ankles ort the carpal joint.

Figure 7: Percentage of the results found

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Table 3: Test liquids and results – acid resistance

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
Excrement acids
Uric acid saturated urea solution (0,4%) no changing no changing resistant
Sulfurous acid 5-6% SO2 no changing no changing resistant
Ammonia solution 32 % solution no changing resistant
Disinfection liquid
Barn Disinfection liquid 2 %-solution of a product with formic acid and glyoxyl acid no changing no changing resistant
Peracetic acid 3000 ppm no changing no changing resistant

Summary

Based on test-stand investigations, the criteria tested in this DLG Approved Test evaluate the comfort and durability properties of the Blister sandbedmat for use in the resting area of high cubicles in cubicle houses. The tested Blister sandbedmat met the requirements of the testing framework with respect to the investi­gated criteria.

DLG Test Center Technology and Farm Inputs

DLG e.V.
Max-Eyth-Weg 1
64823 Groß-Umstadt
Germany
Tel.: +49(0)69 24 788-611
tech(at)DLG.org

A quality mark “DLG-APPROVED FULL TEST“ is awarded to agricultural products which passed DLG’s comprehensive usabi­lity test according to independent and approved evaluation criteria. The product’s most important criteria from the farmer’s point of view are evaluated during this test. The test includes investigations on test benches and under various operating conditions and furthermore, the tested item must prove itself during a practical testing on a farm. The test conditions and procedures are fixed in a test framework which is developed by an independent test commission and adjusted regularly according to accepted rules of engineering as well as to latest scientific and agricultural knowledge and requirements. The successful test concludes with the publication of a test report as well as with the award of the quality mark, being valid for five years after the award.

The DLG Appoved Test “Acid resistance, Joint evaluation” includes measurements in the lab of the DLG Test Center and examinations in practice. The acid resistance was measured and joint evaluation was carried out. The test was based on the DLG Testing Framework for elastic stable flooring, as of April 2010.

The test was based on the DLG Testing Framework for elastic stable flooring, as of April 2010.

Manufacturer and Applicant

New Farms s.r.l.,
Via Visano Nr. 2,
I-25010 Remedello (BS)
www.newfarms.it

Test performed by

DLG e.V.,
Testzentrum Technik und Betriebsmittel,
Max-Eyth-Weg 1,
64823 Groß-Umstadt

DLG test scope
DLG Approved Test “Elastic Stable Flooring” (as at 04/2010)

Area of expertise
Indoor operations

Head of Department
Graduate engineer. agr. Susanne Gäckler

Test engineer(s)
Dr. Harald Reubold *

* Author

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