Typical Questions & Answers
- What is the difference between a composite surfacing system, a grouted macadam or a semi flexible pavement?
None. It’s a two part process consisting of an open graded asphalt typically laid between 30-50mm with high strength microsilica mortars flooded through the asphalt matrix
- How does Dph differ from other grouted macadam's?
In test reports assessing 3 different semi flexible systems the durability of the semi flexible wearing course is depending on the quality of the open graded asphalt, the durability of the mortar used for filling the open graded asphalt and the ability of the mortar to fill the open graded asphalt completely. Based on three different rheological measurements Densiphalt has the best penetration ability. The durability in terms of freeze-thaw resistance and wear resistance of Densiphalt is superior to the other two mortars. The ability to displace water in the open graded asphalt is best for Densiphalt combining the good durability properties of Densiphalt, with this mortars better ability to penetrate had accessible voids and displace any water in the open graded asphalt, will further improves the durability of a semi flexible wearing course using Densiphalt. (These test results are available on request)
- How much does Densiphalt cost compared to concrete?
Densiphalt is cost comparable to concrete subject to construction depths and materials/technology used.
- How much can you lay in one go?
1500m² per day with 1 pump and double with two pumps
- What build ups would you specify in a new build application?
The build up would vary subject to CBR values of subgrade, static or dynamic loadings and if there are any specialist equipment required/ used on site.
- Does Densiphalt withstand trucks slewing and heavy duty trafficking?
Yes
- What surface finishes/colours area available?
The surface finishes available are sand saturated or shotbasted (increase slip resistance), machine swept (rougher texture required), Diamond polish (ultra smooth Terrazzo-like surface) and Densiphalt can also be pigmented the following colours: Red, blue, yellow, black, light and dark grey.
- What gradient can Densiphalt be installed at for slopes?
1 in 15 is maximum
- What Guarantee/Warranty does Densiphalt/CIP offer?
Standard 5 years for a refurbishment installation and 12 years for a new build application.
- Design service – who provides this?
The design service is provided by CIP and by Ramboll Design Engineers in Denmark
- Installation method and quality control on site?
CIP do there own quality control under ISO 9002. The Densiphalt mortars are installed by CIP and preferred local sub contractors install the underlying layers under supervision.
- Is Densiphalt completely slip/skid resistant?
It is as skid resistant as asphalt – refer to tests RAPRA Report.
- Is Densiphalt fuel resistant and impermeable to chemical spillages?
It is more impermeable than asphalt surfaces –refer to tests
- What certificates do we have? HAPAS appropriate for highways?
None at present but we are in the process of applying for the HAPAS certificate
- What is DSP Technology?
Densified system containing homogenously arranged ultra-fine particles and is a result of years of intense research in microsilica, cement technology and dense packing of ultra fine particles.
- How can CIP be sure of full penetration of the asphalt matrix?
Due to quality assurance of the Open Graded Asphalt and microsilica mortars
- What are the main advantages to using Densiphalt over traditional concrete slabs?
Completely jointless, 24hour curing (speed of programme), impermeability to chemical/fuels, wear and durability.
- Can Densiphalt be laid onto old existing concrete slabs?
Yes Densiphalt lends itself ideally to overlay applications saving on excavation and disposal costs, minimising down time for operational areas and adding to the structural integrity of the existing slab giving a longer life expectancy. Preparations need to be effected to minimise reflective cracking.
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