Natural stone paving technique for roads: Injection process‫أﺳﻠﻮب ﺗﻌﺒﯿﺪ اﻟﻄﺮق ﺑﺎﻟﺤﺠﺎرة اﻟﻄﺒﯿﻌﯿﺔ‬‫أﺳﻠﻮب اﻟﺤﻘﻦ‬Stone pavement that does not break under the traffic ofheavyweight vehicles
Cement asphalt mortar (CA mortar), a material with good fluidity that also provides superb
post-curing impact absorption, is injected into the joints between stone blocks in thepavement, some of it reaching and filling the crushed stone spacer layer underneath theblocks as well as the joints on the four sides of the stone block and thus having five sides ofeach stone block bound with mortar. This makes a highly durable stone block pavement that isflexible and impact-absorptive under the harsh loading of vehicle traffic.
Advantages
 Long-term durability that dependably supports large-vehicle’s running.
 Caters to a variety of paving needs from large-scale new pavement to existing road repairs.
 Can be installed over an asphalt paving base.
Installation steps
1. Position stone blocks over the crushed stone spacer layer and inject CA mortar into thejoint areas between stone blocks.
2. Inject enough mortar until the voids between crushed stones are fully filled and the top of
the injected layer comes up to above the mid-point of the stone block height.
3. Apply the finishing mortar up to slightly below the top of the stone blocks.
CA mortar

Crushed stone spacer

Natural stone blocks

Injected layer

Base paving (asphalt concrete or concrete)

Base paving (asphalt concrete or concrete)

Base paving (asphalt concrete or concrete) To assure stone positioning accuracy, the injection layer thickness should be 3 cm.
 No expansion joints need to be installed as the joint mortar has sufficient elastic properties.
 In some situations, the finishing mortar may be applied after the pavement is opened to traffic.

Installation examples

Bus stop zone
Oita Prefecture

LRT strip
Toyama Prefecture

TAISEI ROTEC CORPORATION
http://www.taiseirotec.co.jp/english/

Tourist area
Kyoto Prefecture

Shopping street
Kanagawa Prefecture

Highly durable, stress-reducing asphaltpaving product: Relax-Phalt HT‫ﺗﻌﺒﯿﺪ اﻟﻄﺮق ﺑﺎﻷﺳﻔﻠﺖ ﻋﺎﻟﻲ اﻟﻤﺘﺎﻧﺔ ﻳﺨﻔﻒ اﻹﺟﮭﺎد‬‫ ﻳﺨﻔﻒ اﻹﺟﮭﺎد‬HT ‫ﺗﻌﺒﯿﺪ اﻟﻄﺮق ﺑﺎﻷﺳﻔﻠﺖ‬Long life pavement with cracking and rutting resistance“Relax-Phalt HT” is an improved special asphalt paving product that offers good displacement
conformability (flexibility) and stress relaxation at low temperatures as well as resistance toplastic deformation at high temperatures.
Relax-Phalt HT-based asphalt composites are highly resistant to cracking and fluid rutting,providing an ideal solution to create a long-life pavement for heavy traffic roads.
Advantages

 Reduction of reflection cracking

 Low temperature cracking reductionin asphalt pavement

Overlaying fresh asphalt composites over a concrete
pavement or cracked asphalt pavement involves reflection
cracking concerns. The excellent physical properties of theRelax-Phalt HT-based composite help reduce reflection
cracking in the pavement.

Asphalt pavement in cold climate locations has low
temperature cracking risks due to contraction of thepavement. Relax-Phalt HT is effective in reducing lowtemperature cracking in asphalt pavement.

Composite properties

Pavement cross sections

Examples of application to granular asphalt composite
Cracking resistance

Fluid rutting resistanceOffers 50 times as much
resistance as that of Polymer
Modified Asphalt Type Ⅱ

Offers an equivalent fluidity
resistance as that of Polymer
Modified Asphalt Type Ⅱ

No. of cycles to destruction

Relax-Phalt HT Polymer Modified
Asphalt TypeⅡ

Straight
asphalt 60/80

Repetitive bending test result

Relax-Phalt HT composite
t = 5 cm

6,000 or more

Dynamic stability (cycles/mm)

6,000 or more

Asphalt pavement repair

Preinstalled AS pavement

Preinstalled granular baseRelax-Phalt HT composite
t = 5 cm

Relax-Phalt HT Polymer Modified
Asphalt TypeⅡ

Straight
asphalt 60/80

Asphalt composite

Wheel tracking test result

Loading method

Two-point loading with both ends supported

Specimen dimensions

40×40×400 mm (300 mm span)

Test temperature

5℃

Loading condition

Distortion-controlled 5Hz frequency

Distortion

400 μConcrete pavement

Installation examples
Common national highway(heavy traffic)

TAISEI ROTEC CORPORATION
http://www.taiseirotec.co.jp/english/

Overlay on top of aConcrete pavement

Pavement in a private facility(heavyweight vehicle traffic)

Water-retaining paving technology
Ceracool Block Pavement‫اﻟﺮﺻﻒ ﺑﻤﻮاد ﺗﺘﻤﺘﻊ ﺑﺨﺎﺻﯿﺔ اﻻﺣﺘﻔﺎظ ﺑﺎﻟﻤﺎء‬‫رﺻﻒ ﺳﯿﺮاﻛﻮل‬An environmentally improved paving technology withhigh-performance interlocking blocks alleviates the urban
heat island effect.
“Ceracool” is a water-retaining and aesthetically pleasing paving technology using
ceramic blocks, with strong water retention properties to reduce road surface heating.
Advantages

 Offers excellent water retention.
 Evaporation of retained water in the blocks helps reduce road surface heating.
 Blends in well with natural scenery in the parks or along promenades to create a relaxing,refreshing atmosphere.
 Exhibits an equivalent strength to that of common ceramic pedestrian paving blocks.
 Water supply pipes can be installed under the blocks to provide a constant water retention.

Paving structureStandard cross section

Block surface

Comparison of road surfacetemperatures by thermographs

Ceracool block
Joint material (silica sand)Road base※ Standard color options
include three shades of grayand two shades of beige.

Asphalt pavement surface

Ceracool block pavement surface

Installation examples
Promenade of a shopping mall

TAISEI ROTEC CORPORATION
http://www.taiseirotec.co.jp/english/

Public square in front of a train station

Underground storage of seepage waterusing water-retaining plastics

Underground water retention‫أﺳﻠﻮب ﺗﺨﺰﻳﻦ )إﻧﻔﺎذ( اﻟﻤﯿﺎه اﻟﺠﻮﻓﯿﺔ ﺑﺎﺳﺘﺨﺪام ﻣﻮاد ﺑﻼﺳﺘﯿﻜﯿﺔ ﻟﺤﻔﻆ اﻟﻤﯿﺎه‬‫أﺳﻠﻮب ﺗﺨﺰﻳﻦ اﻟﻤﯿﺎه اﻟﺠﻮﻓﯿﺔ‬Water retention facilities can be created using plastic waterretaining components and protective sheets.
Underground rainwater retention facilities can be efficiently created under public squares,
school athletic fields and car parks to provide an effective solution against flooding or
hazardous rainwater outflow during sudden, intense rainstorms.
Advantages
 Plastic water-retaining components can be assembled (layered or stacked) to create awater storage space.
 The greater void ratio than graded crushed stones enables larger water retention
per unit volume.
 The high void ratio allows water retention facilities to be created in a compact space,involving lesser earth digging.
 The lightweight material can be installed by human workers and reduced jointing
needs between components contribute to low installation error risks.
 Factory-fabricated components provide consistent strength, durability and earthquake
resistance.
 The recycled polypropylene material entails least environmental impact anddoes not detrimentally affect water quality.
Conceptual drawing

Water permeable sheet
Inner protective sheet

Water blocking sheet

Outer protective sheet

Installation examples
The land above can be used for other purposes.

TAISEI ROTEC CORPORATION
http://www.taiseirotec.co.jp/english/

Land used as a public square