Stabilisation of peat with RoadCem
Construction of Tesco Store close to Breydon Water, Great Yarmouth.
RoadCem was used to stabilise the salt water sedge and peat on the site.
Area’s containing Peat or Peat bogs are difficult to implement in a durable construction system. RoadCem now makes the big difference and extends the field of cement stabilisation. RoadCem is the “INTEL” in construction Technology.
PowerCem technology makes it possible to improve and strengthen peat. RoadCem, can be mixed with the Peat soil and cement. This can be executed in different ways. For example, by On Site Technologies in a Mix In Plant or Mix In Place setting:
Mixing and compacting (road constructions and stabilisation’s)
Jet grouting (for the foundation, embankments & foundation slab support)
These processes are exceedingly difficult with just cement alone! In areas of sedge where salt water is present traditional stabilisation with cement alone is impossible. Adding RoadCem will though enable ground stabilisation to be successful. It can even be used with success for stabilisation in saltwater sludges or dredged sediments.
It is generally recognised that organic matter and the low pH of peat plus the presence of Humic acid tend to interfere & delay the hydration process when it is to be stabilised using Portland cement. This is usually because the organic acid reacts with calcium liberated from cement hydrolysis to form insoluble calcium humic acid making it difficult for the crystallisation which is responsible for the for the required increase in strength to take place.
Furthermore, the secondary pozzolanic reaction of the cement stabilised peat is retarded due to insufficient silica (SiO2) and alumina (Al2O3) that can react with calcium hydroxide [Ca(OH)2] generated from cement hydration to form secondary calcium silicates, which are responsible for the long term compressive an tensile strength gain of the stabilised peat soil.
This situation has now however changed forever with introduction to the UK of the Dutch manufactured product RoadCem, a cement additive/modifier which totally alters the hydration. curing process of cement. Nullifying the calcium effect and encouraging enhanced crystallisation to take place, quickly increasing the long terms compressive and tensile strength of the stabilised peat and allowing its use for construction applications.