Lloyd Acoustics Ltd based in Belfast purchased a CX 4/10 grout mixer/pump in December 2015 in preparation for a 324mm diameter ODEX drilling project at University of Ulster, York Street, Belfast.
This project required 74 No. ODEX boreholes to be drilled through upper soft alluvium soils known as “Belfast Sleech”, continuing through lenses of clays, silts and gravels until competent underlying sandstone at approx 25m. These boreholes had permanent casings drilled and left to the head of the sandstone and open hole drilling until the deeper design depths. The client preferred methodology for replacement in-fill was to tremmie base grout the boreholes from bottom ensuring boreholes were totally volumized with cementitious grout. This initially provided Lloyds with a concern, “How do we grout this many boreholes with this much grout in this time? The client’s choice eliminated any outside supply concrete company batching and supplying us with delivery trucks!”
“Our selection of the CX 4/10 grout pump was based on previous experience quality of mix, reliability and known realistic outputs. Indeed having the daunting job of grouting 74 No. boreholes with 8500 bags of cement equalling almost 130,000 Litres of cement grout in 7 weeks, we did not want to take any chances! We are delighted to report that we successfully completed the total mix even with a few extra boreholes for good measure.” – Nigel Dillon, Lloyds Acoustics Ltd
Needless to say, Lloyds Acoustics were very satisfied with the CX 4/10.