Compaction Specifi Cation; Troubleshooting Guide - Belle Group PCX 350 Bedienungshandbuch

Various methods have been employed in the past to specify the compaction required for various applications. The factors to consider
are, material properties, layer thickness, pressure applied, vibration and number of passess. Greater
understanding of how compaction works has lead to new compaction specifi cations being introduced.
The most up to date specifi cation is part of the U.K.'s NRSWA (New Roads & Street Works Act). Civil Engineers are now adopting
these specifi cations to ensure good compaction for all site work.
NRSWA (HAUC specifi cation).
The specifi cation was compiled by HAUC (Highways Authorities & Utilities Committee).
The 'New Roads and Street Works Act 1991, set a new standard for road repairs and reinstatements in the UK. It covers materials,
methods, equipment and safety when carrying out reinstatements on roads and footways.
The reason for the act is to ensure repairs and reinstatements are carried out to a higher standard and ultimately last longer. This in
turn will reduce the need for costly remedial work and reduce traffi c delays.
There are two categories specifi ed for plate compactors.
1. 1400 to 1800kg/m² 2. Over 1800kg/m²
These fi gures relate to the static pressure applied by the machine
NOTE: No standard single direction plate compactors comply with this minimum specifi cation. For highways work always use a 'Dual
Force' plate compactor.
DUAL FORCE
Belle Group studied the act then developed and patented equipment to enable contractors to comply with the act's requirements.
The NRSWA legislation requires that compaction equipment meets the minimum specifi cation. By purchasing an Belle Group 'Dual
Force' plate, you are immediately complying with this part of the act. To comply with the specifi cation and maintain surface tolerance,
Belle Group 'Dual Force' base plates are divided into two areas providing two stages of compaction.
Stage 1: The full base area compacts the material like a standard machine.
Stage 2: The base rises onto the 'Dual Force' section to give 3 to 4 times the compaction force of standard plates.
Problem
Engine will not start.
Engine still will not start.
Unit will not vibrate.
Asphalt adhering to plate.
Paving blocks damaged.
Bituminous surface
fl aking (laminating).
Low travel speed
(plate sinking).
Compaction Specifi cation

Troubleshooting Guide

Cause
No fuel.
Engine switched off.
Spark plug fouled.
Engine cold.
Engine fl ooded.
Major Fault
Engine speed too slow.
Drive belt tension loose.
Air fi lter blocked.
Drive failure.
Vibrator failure.
Lack of lubrication.
Plate in direct contact with material.
Standard pad used on Dual Force plate.
Over compaction.
Layer thickness too deep.
Moisture content too high or too low.
Remedy
Open fuel tap.
Fill fuel tank.
Switch engine on.
Clean and reset plug gap.
Close choke.
Honda, open choke, fully open throttle, pull recoil starter
until engine fi res.
Hatz, move speed control to stop, pull recoil starter 5
times then repeat start procedure.
Contact Agent or Belle Group.
Set engine speed control to fast.
Adjust belt tension.
Clean or renew air fi lter.
Contact Agent or Belle Group.
Contact Agent or Belle Group.
Use a water spray system.
Use a paving pad.
Fit correct Dual Force Pad
Remove and relay.
Remove some of the material.
Remove material and adjust.
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