Capital Equipment News January 2018

COMPACTION EQUIPMENT – ROLLERS

Caterpillar’s CD54B tandem drum vibratory roller comes with passcount/ coverage and temperature mapping.

Goscor Earth Moving stocks SANY's STR30 and the SSR120 rollers.

tects the aggregate in the mix from potential damage. Further developments The introduction of documentation systems as well as EDP and GPS supported machine controls has been another significant change and milestone in compaction rollers in recent years. According to Kukard, in this regard, HAMM has its HCQ (Hamm Compaction Quality) and it works in both asphalt and soil applications. It gives the operator live feedback while compacting and thus giving the operator full control of the compaction process, and guaranteeing compaction accuracy. “The ability to retrofit between different machines and construction sites makes HAMM HCQ a unique offering,” explains Kukard. Caterpillar offers scalable global posi- tioning systems that can help the operator monitor pass counts and coverage, as well as correlate recorded measurements with the precise location they were taken. “This allows users to visualise the progress and quality of the work, leading to greater effi- ciency. Systems are available that allow mul- tiple operators to ‘see’ not only their work as it progresses, but also the work of others on the site. This can help assure maximum cov- erage and uniformity in the work,” Sjoblad explains. Caterpillar’s measurement systems and the positioning systems record data that can be analysed or used to ensure quality. Vi-

The SSR or Single Drum consists of two ranges: the Compact range starting at 7 t through to the SSR120 at 12 t. The Heavy Duty Range starts with the SSR180 through to the SSR260. “Last, but not least, is the SPR or Pneumatic Roller that comes in three different models, SPR200, SPR260 and the SPR300,” says Steenkamp. High-tech developments A lot of R&D has gone into the development of rollers in recent years as the product continues to evolve. For example, the use of electronic measuring and computing technologies and of micro-processor controls has been a key focus point. Hanekom says while electronically mea- suring the stiffness of the soil is available on most compaction equipment today, com- petitor machines are unable to use these measurements. Bomag, however, has pat- ented unique technology which takes this a step further. “Bomag’s VARIOCONTROL technology measures the stiffness of the soil and directs the measurements to the exciter system to give higher or lower amplitudes depending on the target stiffness that has been programmed into the machine. The same technology is used on the asphalt com- pactors and is known as the Bomag Asphalt Manager,” explains Hanekom. Caterpillar offers compaction measure- ment technologies for both soil and asphalt applications. “For soil, we have two mea- surement systems: CMV (Compaction Meter

Value) and MDP (Machine Drive Power),” ex- plains Sjoblad. The two systems both provide an indication of soil stiffness to the operator in real time. The systems offer different yet complimentary capabilities and application ranges. A single machine can be equipped with both systems to ensure maximum capa- bility range. For asphalt applications, Caterpillar offers compaction measurement and temperature measurement as well. CMV compaction measurement provides a composite indica- tion of stiffness of not just the asphalt layers but also the underlying base material. Tem- perature measurement allows the operator to confirm that temperatures are optimal for compaction, and helps the operator avoid work during the tender zones. “We offer scalable global positioning sys- tems that can help the operator monitor pass counts and coverage, as well as correlate recorded measurements with the precise location they were taken. Systems are also available that allow multiple operators to ‘see’ not only their work as it progresses, but also the work of others on the site,” explains Sjoblad. Some of Caterpillar’s Tandem Drum Vi- bratory Rollers can be equipped with Auto Adjustable Compaction (AAC), a feature that automatically adjusts the amplitude of the vibratory system to ensure that the energy output is optimised to the maximum amount of energy the mat can accept. This ensures the greatest compaction efficiency and pro-

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