HAMM 3520 P ROLLER – COMPARATIVE WITH OTHER FIVE BRANDS CAERTIFY BEST PERFORMANCE

To evaluate the performance of the equipment options available in the market, labs from a few constructions companies have tested, along with the inspection of competent organs in each state, the performance of the soil compactors in the most varied ongoing works in Brazil, under several humidity conditions. In addition to the Hamm roller model 3520 P, other rollers have also been tested, here identified as roller of brand B, C, D, E and F.

TESTS IN GOIÁS / GO GO-070 ROAD

Goal: To evaluate the performance of the Hamm roller 3520 P with the competition rollers from BRAND B and guide the team regarding the best way to use the compactor, seeking to achieve maximum efficiency.
Job: Goiás – duplication of GO-070 ROAD – stretch close to the city of Itaberaí-GO
Inspection: Trial carried out by the laboratory agents of the construction company and inspected by AGETOP (Agência Goiana de Transportes e Obras).

Characteristics of the stretch in which the equipment was used:

  • Soil: clay soil base
  • Goal: compaction in layers
  • Length: 500 meters
  • Width: 7.5 meters
  • Layer thickness: 20 cm
  • Customer: CCB Construtora
  • Dates: August 25, 26 and 27 2014
  • Person responsible: Juliano Gewehr (Ciber)

GO-070 is a highway in the state of Goiás that connects Goiânia to the Northwest of the state. It has over 200 Km (124 miles) and it is one of the most important highways in the state. It runs through cities like Goianira, Inhumas, Itauçu, Itaberaí, Cidade de Goiás, Faina, Crixás, São Miguel do Araguaia and Santa Rita do Araguaia. It is an important tourism route, since there are tourist cities along its way.

Three machines were evaluated on a stretch of Hours worked duplication of the GO-070 Road, near the city of Itaberaí. The soil of the place was predominantly a clay soil, compacted in 20 cm thick layers. The 20 ton compactor Hamm 3520 P and three 11 tons BRAND B rollers were used. The equipment was used one after the other, with the goal of reducing the number of complete passes (back and forth on the same track). With the use of BRAND B rollers, 7 or 8 complete passes were necessary. With the Hamm roller 3520 P the number of complete passes was reduced to 5.

The study concluded that the Hamm roller 3520 P obtained alone a performance that was higher to the three BRAND B rollers and on the 11 ton range, when tested simultaneously on lateral lanes. The necessary degree of compaction of the soil was reached by the Hamm roller in 5 passes, whereas the other three rollers needed from 7 to 8 passes to reach it. There was fuel economy with the Hamm roller, in the comparison with BRAND B, it got to 59%.

Another important differential pointed out is regarding the area of trapezoid pad of the Hamm compacting roller 3520 P which is of 152 cm², whereas the BRAND B’s is 137 cm², about 10% difference. For cohesive soils (Clay type) the higher the pad area, the deeper the compaction, in addition to facilitating the removal of humidity of the land, favoring compaction.

COMPARISONS AND RESULTS

TESTS IN RIO DE JANEIRO/ RJ
UHOS ACCESS ROA D – COMPERJ

CHARACTERISTICS OF THE STUDY

Goal: Comparative test between vibrating compacting rollers of a Hamm 3520 P brand cylinder and BRAND D 11 tons. The equipment was put in operation side by side.
Job: UHOS (ultra heavy over size) Acess Road - COMPERJ (Rio de Janeiro Petrochemical Complex)
Inspection: Trial carried out by laboratory agents from TecnoInst Serviços Técnicos Ltda.

Characteristics of the stretch in which the equipment was used:

  • Soil: grit type, which is a product from quartz rocks – leuco granite feldspathic, such as granite and gneisses, have permeable features and mechanically disassemble, extracted from nearby deposits.
  • Goal: compaction in layers
  • Length: 60 m
  • Width: 12 m
  • Slope: 0%
  • Layer thickness: 30 cm
  • Customer: Carioca Engenharia – Christiani - Nielsen
  • Dates: June 10th, 2014
  • Person responsible: Engineers Diogo, Davi and Lucas

A work of relevance because it consists of the Road responsible for supplies traffic going to COMPERJ (Petrochemical Complex of Rio de Janeiro), a project of a refinery construction with two lines of oil processing. At the location, a comparative test was carried out between the Hamm compacting roller and the BRAND D roller.

The soil of the place is grit type, which is a product that comes from the quartz rocks. The stretch where it was done was 60 meters long and 12 meters wide, completely flat. The thickness of the layer was of 30 cm and its humidity was of 10.5%.

Provided that the Hamm roller was a 20 ton roller and BRAND D was an 11 ton, the proposal of the test was to do 6 passes with the first and 12 passes with the second, respectively, analyzing the results. The two of them produced similar soil compaction degrees: 99% and 99%. However, the Hamm compactor reached this result with half the passes of the BRAND D equipment and in half of the time. It is possible to conclude that the Hamm roller at the end of the tests presented twice the efficiency of the BRAND D roller.

COMPARISONS AND RESULTS

In the testes done, fuel consumption was one of the main differentials of the 20 ton Hamm roller. Considering that this roller 3520 P has a 6 cylinder engine and air condition, and yet it performed with high efficiency the job that required two BRAND D rollers to be done, with 4 cylinders engines and open cabin, that is, more engine power and air conditioned cabin resulting, nevertheless, in a lower fuel consumption.

TESTS IN CEARÁ / CE FORTALEZA URBAN ROAD

CHARACTERISTICS OF THE STUDY

Goal: Comparative test between single drum vibrating compacting rollers, a Hamm brand 3520 P and BRAND C, BRAND E and adapted rollers tamping type BRAND F.
Job: IV Anel Viário de Fortaleza – Via de Ligação – Distrito Industrial – Ceará.
Inspection: Trial carried out by the lab agents from JBR Engenharia.

Characteristics of the stretch in which the equipment was used:

  • Soil: Clay type soil – sandy soil, from the J7 deposit – leucogranite, with granite and gneisses, and they have permeable and mechanically disassemble features, extracted from nearby deposits.
  • Goal: compaction in layers
  • Length: 40 m (stakes 284 to 286) / 190 m (stakes 319 to 328).
  • Width: 11 m
  • Slope: 0% / 5%
  • Layer thickness: 20 cm
  • Customer: Carioca Engenharia – Christiani - Nielsen
  • Dates: August 6, 2014.

The main work done in federal roads that pass through Ceará in the past 25 years, the Fortaleza Inner Ring Road will relieve the heavy traffic in the region. At that location, comparative tests between single drum vibrating compacting rollers Hamm brand 3520 P and BRAND C, BRAND E and adapted rollers tamping type BRAND F were done. The machines were put into operation side by side for the comparative tests.

The stretches where the tests were done had a Sandy clay soil and 40 and 190 meters, each one. The first stretch was plain and the second had 5% slope, in addition to the layer thickness of 20 cm.

With the same number of passes, the Hamm brand equipment presented a degree of compaction of 97%, against 84.6% of BRAND E equipment, and 94.5% of BRAND C roller.

COMPARISONS AND RESULTS

In summary, in order to reach 100% compaction, the Hamm roller used half the number of complete passes and passes when compared to BRAND E roller and 33% less complete passes and passes compared to BRAND C roller.

The model of roller tested from BRAND F is na adapted piece of equipment with a tamping type roller that uses the static mode to reach the desired degree of compaction. The equipment uses its weight and speed (above 17 km/h) to create impact forces through the padfoot drums.

This type of machine has certain limitations, such as for example, the need of large areas to be able to compact, as well as the place for increasing and decreasing speed to reach 17 km/h and be able to break. It also presents high fuel consumption and noise emissions, above 100 decibels. In many cases, it is noticeable that the emission of pollutants is not in agreement with the current regulations, and, in addition, the way it is operated offer safety risks for the operator.

COMPARISONS AND RESULTS

The final result was very clear and superior for the Hamm roller 3520 P in relation to the BRAND F roller. The number of necessary passes and complete passes with the Hamm roller was twice less in relation to BRAND F roller, excelling a highly expressive fuel economy gain, as shown in the following chart:

COMPARISON OF EQUIPMENT USED IN THE TESTS

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