FWG・Permeability & Water-Retention Pavement System

Miracle Sol (multipurpose environmental material)

Miracle sol is an industrial product made from wasted glasses. The manufacturing process is as follow.
First, the waste glasses are pulverized under 100μ, then, they are calcined at temperatures of 800～900°C with the forming agent. Two types of “Miracle Sol” are manufactured by the method. The one is water absorbent type (continuous void structure) and the other one is non-absorbent type (independent void structure). Japanese Ministry of Economy, Trade and Industry (the then Ministry of International Trade and Industry) had offered subsidy for the development. Until now, 8 kinds of materials including Zeolitized-FWG had already been developed.
Also, the method for adjusting specific gravity has been developed.

Miracle Sol
(Water absorption type)

Miracle Sol
(Water absorption sedimentation type)

Miracle Sol
(non-Water absorption type)

FWG・Permeability ＆ Water-Retention Pavement System

A pavement, which has an ability to permeate and retain of water is effective to lower the temperature of the road-surface, as long as keeps in moisture. However, if the pavement runs dry, it can no longer lower the temperature. In 2022, an experiment was carried out to measure the differences of the ground-temperature at a lot of SAGA SUNRISE PARK (Saga city), where a water level of the underground is high. The experiment had been conducting over 118 days, since Jun.9 to Oct.4, on the experimental area which applied FWG ・Permeability & Water-Retention Pavement System, also the contrastive area next to the experimental area as well.

Comparison of the temperatures of the surfaces

Between No.② experimental area and the contrastive area;

The maximum temperature difference was 13.5°C, on Jun.9

There were 88 days whose temperature differences of above

5°C at max. It accounts for 74.6% of total fixed period of time,and 25 days of above 10°C differences, accounts for 21.2

The experimental areas	Total(rate in total)	The maximum temperature differences
①	71 days (60.2%)	11.4°C
②	88 days (74.6%)	13.5°C

※ It was confirmed that the ground-temperature of No.② experimental area where two absorbent poles were embedded in the underground, showed a larger number of differences, compared to No.① experimental area where one absorbent pole was embedded.

SAGA SUNRISE PARK Measurements of temperatures 9/6/2022
Ground temperature/Precipitation/Air temperature

Comparison with a thermograph

FWG・Permeability & Water - Retention Pavement System utilizing underground water
Cross section of FWG・Permeability & Water - Retention Pavement System absorbing underground water

Description of the absorbent-pole Note: D(depth) φ(caliber) L(length)

First, make a hole ( D,2m) by digging in the road-bed where underneath the water-retentive base, then, insert a VP pipe (φ10mm, L2m) into the hole, lastly, fill the pipe with Miracle Sol.

1m tip of the pipe absorbs water from underground through some pits previously made, then, brings the water up to the water-retentive base by its capillary action of the Miracle Sol(under 2mm) with countless pores. This is the structure of the system.(Water level GL=-1.00m)

Company