AU2020239626A1 - Apparatus and method for applying friction-modifying coating to a road surface - Google Patents

Abstract

The invention relates to an apparatus for applying friction modifying coating to road surfaces that is efficient for improving road surfaces both in terms of friction and subterranean quality, and application efficiency sothat equipment can be used more frequently substantially without the need to dispose of and/or replace component elements. A friction modifying road surfacing apparatus including a mobile platform for supporting and transporting to site a plurality of interactive modules comprising a storage module having a plurality of silos for storing separately components of a two-part setting resin and a fine particulate, and a coarse particulate road covering material; a mixing module; a dispersion module; a control module for controlling the flow, mixing and dispersion in coordination with the movement of the mobile platform and a cleaning module for cleaning the residue of the activated two-part setting resin from at least the dispersion module to prevent fouling.

Description

APPARATUS AND METHOD FOR APPLYING FRICTION-MODIFYING COATING TO A ROAD SURFACE

[001] Field of the Invention

[002] The present invention relates to an apparatus for applying friction-modifying

coating to a road surface. In particular the invention relates to an apparatus for applying

friction modifying coating to road surfaces that is efficient for improving road surfaces both

in terms of friction and subterranean quality, and application efficiency so that equipment

can be used more frequently substantially without the need to dispose of and/or replace

component elements.

[003] The invention has been developed primarily for use in the road surfacing industry

and with regard to improved safety and application efficiency and will be described

hereinafter with reference to this application. However, it will be appreciated that the

invention is not limited to this particular field of use.

[004] Background of the Invention

[005] It is known to apply friction-modifying coatings to road surfaces to increase

coefficient of friction of the roadway through the use of high friction coatings. Increasing

the coefficient of roadways by the use of high friction coatings can increase tyre grip

regardless of tyre or road conditions and thereby improve road safety.

[006] High friction coatings commonly used in road surfacing include asphalt that is

dispensed from trucks in bulk and aggregate can be covered or mixed in with the asphalt.

However such material is not a truly long lasting high friction surface. (refer prior art figure

1).

[007] It is known to manually use a two-component epoxy system comprising an epoxy

resin and a catalyst, which acts as a binder for an aggregate material such as bauxite to

bind the aggregate to the road surface. Historically, the binder is formed by providing

predetermined amounts of epoxy resin and catalyst in a vessel and stirring by a mixing

blade. The mixed epoxy binder is poured onto the road surface and spread over the

surface by means of a squeegee or like implement. Once binder is spread over the road

surface, it is common for laborers to manually shovel aggregate material onto the surface

of the binder. The aggregate will generally sink to the bottom of the binder and when the

binder hardens the binder will bind the aggregate to the road surface. The aggregate is

usually large and irregular in shape and therefore protrude from the binder coating and

increases coefficient of friction of the road surface.

[008] It is common practice to overlay distressed road substrates such as concrete or

asphalt with binder and aggregate to restore smooth wearing surfaces. While friction of

the road surface is improved by the laying of the aggregate material, it is common for road

surfaces and support concrete substrate to suffer fatigue from repeated loading over time

and general movement by thermal expansion and contraction of joins in the substrate.

Fatigue may manifest in surface cracking, voids and fissures in the road surface and

substrate.

[009] Characteristics of road surface and substrate fatigue are not remedied by

increasing surface friction as any underlying cracks, fissures and voids are still present

and therefore underlying problems exacerbated by continued exposure to physical

environmental and load factors that reduce road quality.

[0010]Some attempts have been made to incorporate particulates to the binder on the

road surface (refer figure 2 prior art), however this has resulted in undesirable clumping

of the smaller particulates throughout the binder matrix as shown in figure 2 of prior art.

[0011 In addition to the foregoing drawbacks, conventional means for road surface

friction modifying application expose components and working elements to resins that

may set in-situ as a result of imprecise reaction amounts and/or require disposal and

replacement of fouled components as a result of or following an installation.

[0012] Also fouled equipment is expensive to replace, time consuming to remove and

install new equipment, and in the meantime the apparatus is out of service hence there

is a commercial disadvantage. It is not possible to automate or create a mobile system

without overcoming the problems of fouling. Typically concrete trucks were made only

possible by the rotation of the bulk container so as to retain the concrete in motion and

not allow to set. If it sets the concrete must be jack hammered out.

[0013] It would be an advantage to provide an apparatus that improves usefulness of such

an apparatus and allows mobile use of epoxy resin friction-modifying coating to a road

surface .

[0014] There are a number of problems with the prior art including the following:

e epoxy binders generally require an 'ideal' ratio of epoxy resin to catalyst - too

much of one or the other component can affect the performance and properties

of the resultant hardened binder;

0 prior art manual combining of the multi-part epoxy binder uses imprecise

measuring techniques, which introduces errors in the component mixing ratios;

0 mixing of epoxy resin and catalyst may not be sufficient thereby resulting in

regions of epoxy resin in the mix where the ratio of resin to catalyst is not ideal

resulting in ineffective binding, adhesion to filler, curing time and extent of

hardening;

0 limited rate of application of the friction-modifying coating;

0 if the mixing time is too long, the binder may start to harden before application to road surface therefore affecting surface adhesion and spreadability - do not want aggregate enveloped by the binder - the aggregate needs to protrude from the binder to improve coefficient of friction;

" timing delay between applying aggregate to binder can often be a delay of

minutes during which binder solidifies;

• conversely, if the binder is not sufficiently viscous, the binder surface coating

may not be sufficient to hold the aggregate in place or bind the aggregate

effectively to the road surface;

" variability of thickness of binder across a road surface;

* variability in aggregate density across binder coating;

" conventional road surfacing techniques is time consuming and labour intensive

with commensurate economic disadvantages.

[0015]The present invention seeks to provide an apparatus and method for applying

friction-modifying coating to a road surface, which will overcome or substantially

ameliorate at least one or more of the deficiencies of the prior art, or to at least provide

an alternative.

[0016 It is to be understood that, if any prior art information is referred to herein, such

reference does not constitute an admission that the information forms part of the common

general knowledge in the art, in Australia or any other country.

[0017] Summary of the Invention

[0018 In accordance with the invention there is provided a friction modifying road

surfacing apparatus including a mobile platform for supporting and transporting to site

a plurality of interactive modules comprising: a. A storage module having a plurality of silos for storing separately components of a two-part setting resin, and a particulate road covering material; b. A mixing module connected to the storage module for receiving and mixing the separate components of the two-part setting resin to effect activation of the two-part setting resin c. A dispersion module having: i. a first part for receiving the activated two-part setting resin and feeding to one or more dispersing outlets extending across a rear portion of the mobile platform to effect a continuous layer behind the mobile platform; and ii. a second part for dispersing behind the first part the particulate road covering material over the activated two-part setting resin to effect a road surface; d. A control module for controlling the flow, mixing and dispersion in coordination with the movement of the mobile platform; e. A cleaning module for cleaning the residue of the activated two-part setting resin from at least the dispersion module to prevent fouling and allow use directly at another site.

[0019 In a further aspect of the invention there is provided a friction modifying road

surfacing apparatus comprising: a. a mobile platform; b. a first supply of a first part of a

two-part setting resin; c. a second supply of a second part of the two-part resin setting; d.

a particulate supply; e. a first mixer for mixing the first part of the two-part setting resin

with a controlled quantity of the particulate supply to provide a substantially homogeneous

liquid particulated first part; f. a second mixer for mixing the liquid particulated first part with the second part to form a settable particulated two-part setting resin; and g. a disperser for dispersing the settable particulated two-part setting resin.

[0020]The present invention represents an advance over the prior art because it is able

to homogeneously incorporate a particulate in particular a powder into the resin binder

mix, and therefore substantially minimize clumping as shown in the prior art.

[0021] In addition, the ability to introduce powder into the resin binder in a substantially

homogeneous form increases resin volume and provides a significant cost reduction.

[0022] Even further, the homogenous resin and particulated material allows the

particulate material as opposed to aggregate to fill cracks, fissures and voids in the road

surface and substrate to improve the quality of the road surface as well as improve friction

and road traffic safety.

[0023] Preferably the two-part setting resin is a thermosetting resin.

[0024]The two-part setting resin can be an epoxy resin.

[0025] Preferably the particulate is a powder filler. The powder can be particulate fused

silica.

[0026]The apparatus can further include a load cell on the mobile platform.

[0027]The apparatus can additionally include a plurality of storage silos on the load cell,

the storage silos separately storing resin and powder filler components, wherein the filler

component is a silica powder.

[0028]The apparatus can further include a control system to introduce powder filler from

the powder filler storage silo into the mixer with the first supply of the first part of a two

part setting resin at a predetermined rate. The ability to introduce powder into the resin

liquid at various rates can be synchronized to control system via the load cell to introduce

substantially precise amounts of liquid resin components and powder filler. The improved measurement and tracking of components and amounts reduces prior art propensity for premature setting.

[0029] By providing a powdered filler component in a first mixing stage with a first supply

of a first part of a two-part setting resin, the first part of the resin and the filler can be

mixed to achieve a homogenous dispersion of filler in advance of secondary mixing

downstream with the second part of the resin binder.

[0030] Preferably the apparatus includes a vibrating hopper to introduce a predetermined

amount of the powder filler into the mixer with the first supply of a first part of a two-part

setting resin by means, wherein the vibrating hopper is effective to agitate the powder

during transfer to the mixer to substantially maintain a free flow of powder.

[0031]Therefore the introduction of powder to a liquid presents many challenges like

getting ratio correct, not having lumps in the mix and ensuring the powder does not get

stuck in the feed hopper. The challenges presented caused us to look outside the box

and redesign and customise two pumps to mix this powder into a homogenised blend

enabling us to use this blend at the rear of the truck were it was mixed again with the

hardener prior to being dispersed onto the road surface along with this we have also used

pneumatic adjustable valves to control powder dispersion along with a pneumatic vibrator

to keep the powder loose and free flowing.

[0032]The apparatus can include a heating system on the movable platform for

preheating the resin components and maintaining the components in a liquified form for

flow and mixing.

[0033]The heat is to make the resin viscosity perform better and self-level faster when it

is applied to the road surface.

[0034]The apparatus can comprise pumping means and dispensing means for drawing

stoichiometric quantities of resin components and powdered binder determined by the

load cell

[0035]Preferably the apparatus includes an on-board PLC (Programmable Logic

Controller) computer systems software for operating the load cell and determining

amounts of resin components and powder.

[0036]The combined use of a load cell and operating control system for automating flow

of components based on load cell determinations of components represents a

contribution in the field by addressing the problem of precise ratio of binder components.

[0037]The apparatus can further include a pneumatic adjustable valves and pneumatic

vibrator to substantially maintain free flow of powder and control of powder dispersion.

[0038] The apparatus can further include a blending station for receiving resin

components and powder binder, the blending station having a shear mixing operation to

integrate the powdered binder and resin.

[0039]The apparatus can further have a resin receiving tank and manifold, the manifold

being operable to receive a quantity of resin binder mix from the receiving tank and move

between a receiving mode and dispensing mode close to a road surface, wherein the

resin/binder provides greater flow properties and improved road surfacing of holes and

voids. The use of and homogeneous dispersion of powder in the resin binder mix provides

increased control over binder viscosity leaving the manifold and improved reinforcement

of voids on road surfaces and even distribution.

[0040] Preferably the manifold is fully on the fly adjustable to enable accurate dispensing

of the resin system.

[0041] Preferably the apparatus further includes a recirculating cleaning system having a

supply tank storing cleaning agent adapted to flush through the working components of the apparatus including pumps, line, resin tank and manifold and flush remove plaque therefrom and return to a recovery tank, wherein the apparatus can be substantially maintained. Preferably the supply tank and recovery tank are interconnected and supply each other with xylene when required.

[0042]Preferably the cleaning agent is selected from a solvent including xylene.

Preferably the recirculating cleaning system includes a filter adapted for filtering the

cleaning solvent. In a further preferred aspect, the return line is double filtered to remove

contamination so xylene can be used again. The recirculation system helps to save the

environment by filtering used xylene and enabling reuse the solvent repeatedly therefore

minimising impact of environmental waste.

[0043] Existing apparatuses need substantial maintenance and cleaning between

applications as the resin binder solidifies, and equipment needs replacement before the

apparatus can be used again. The present apparatus addresses the problem of hardening

with existing devices by including the recirculating flushing system which floods the lines

and components including pumps, manifold, in a flush mode at the end of or during an

installation period, with a cleaning agent such as xylene.

[0044] The cleaning/flushing system reduces the need for substantial maintenance

between applications and allows a single truck to be substantially more operational and

decrease need to dispose of equipment such as resin bar. The solvent flush system

assists with cleaning the apparatus components and system after each application.

[0045] The apparatus can include a control system to provide information about weight of

material used and costs and other control mechanisms, i.e. shear rate and viscosity,

operation of the resin bar and cleaning system, safety etc.. Preferably the resin and

powder filler are mixed at a ratio of about 1:1:1.

[0046]A method of modifying a road surface including the steps of: a. providing a first

part and a second part of a two-part setting resin; b. providing a particulate supply; c.

mixing the first part of the two-part setting resin with a controlled quantity of the particulate

supply to provide a liquid particulated first part; d. mixing the liquid particulated first part

with the second part to form a settable particulated two-part setting resin; and e.

dispersing the settable particulated two-part setting resin.

[0047] Preferably the friction of the road surface is altered by selection of the particulate

sizing and material. Preferably the particulate material is fused silica in a powder form.

The ability to incorporate powdered silica gives the resin binder more volume allowing

greater surface covering. In accordance with the present invention, the ability to use

powder filler assists with retaining the resin on steep inclines or declines.

[0048] Preferably the friction of the road surface is increased by selection of the particulate

sizing and material.

[0049] Preferably the friction of the road surface is reduced by selection of the particulate

sizing and material.

[0050 In a related aspect of the invention there is described a mobile apparatus for

applying a friction-modifying coating to a road surface comprising: a mobile or wheeled

platform; a load cell mounted on a portion of the platform; one or more resin tanks

operationally mounted on the load cell; a pumping means fluidly connected to the resin

tanks for drawing and pumping select amounts of resin therefrom; heating means for

controlling temperature of the resin tanks; an integrated control system for metering

precise amounts of resin and premixing of resin components at a controlled temperature;

a first pump means adapted to receive a liquid resin component, wherein a powdered

component is introduced to the liquid; a second pump means downstream from the first

pump means receiving mixture from the first pump means, wherein the second pump means is adapted to homogeneously mix the received powder/liquid mixture; a mixing means fluidly interconnected downstream from the second pump means for receiving the mixed powder/liquid resin component and a second resin component at a predetermined rate; a distribution tank which receives the mixed resin components; a resin bar connected to the distribution tank for dispensing mixed resin components; and an aggregate feed dispenser for dispensing aggregate together with mixed resin onto a road surface.

[0051] Benefits

[0052]The apparatus according to the present invention provides the following benefits:

* homogenised blend enabling dispensing the blend at the rear of the truck where it

can be mixed again with a hardener prior to being dispersed onto the road surface;

* homogenized powdered silica and resin binder provides more volume allowing

greater surface covering;

* powder and binder mix provide more even distribution over a surface;

• powder in binder mix allows improved void and fissure filling;

• ability to clean components and recirculate solvent cleaning agent;

" maintains greater operational use, i.e., less down time due to overhaul and

cleaning of equipment;

• less equipment redundancy;

* greater control over quantitative accuracy;

[0053] Other aspects of the invention are also disclosed with reference to accompanying

drawings and examples.

Brief Description of the Drawings

[0054] Notwithstanding any other forms which may fall within the scope of the present

invention, preferred embodiments of the invention will now be described, by way of

example only, with reference to the accompanying drawings in which:

[0055]Fig. 1 is a schematic flow diagram of a prior art application of binder to a road

surface;

[0056]Fig. 2 is a schematic representation of a road surface as applied by the prior art

binder process in figure 1;

[0057] Fig. 3 is a schematic flow diagram of a road surface application in accordance with

a preferred embodiment of the present invention;

[0058] Fig. 4 is a flow diagram of a road surface application in accordance with a preferred

embodiment of the present invention;

[0059] Fig. 5 is a schematic of the improvement provided by the invention by a levelling

epoxy resin with bauxite filler to provide friction with increased microtexture and

macrotexture;

[0060]Fig. 6 is a schematic representation of an apparatus for applying a friction

modifying road surface in accordance with a preferred embodiment of the present

invention;

[0061] Fig. 7 is a schematic representation of a platform used in the apparatus of figure 5

for applying a friction modifying road surface in accordance with a preferred embodiment

of the present invention;

[0062] Fig. 8 is an engineering flow diagram of a working apparatus for applying a friction

modifying road surface in accordance with a preferred embodiment of the present

invention;

[0063] Fig. 9 is a schematic representation of a dispensing manifold used in the apparatus

of for applying a friction modifying road surface in accordance with a preferred embodiment of the present invention;

[0064]Fig. 10 is a perspective schematic representation of a resin bar used in the

apparatus of for applying a friction modifying road surface in accordance with a preferred

embodiment of the present invention;

[0065]Fig. 11 is a cross-sectional schematic representation of the resin bar of figure 10

with dispensing plate attached in the apparatus of for applying a friction modifying road

surface in accordance with a preferred embodiment of the present invention;

[0066]Fig. 12 is a photographic representation of a dispensing end of the present

apparatus including resin bar and dispensing plate of figure 11 and height adjustment

structure for the resin bar in accordance with a preferred embodiment of the present

invention;

[0067]Fig. 13 is a photographic representation of a dispensing end of the present

apparatus including resin bar as in figure 12 showing delivery of resin onto a road surface

in accordance with a preferred embodiment of the present invention;

[0068]Fig. 14 is a photographic representation of a dispensing end of the present

apparatus including an actuator assembly for a spreader box in accordance with a

preferred embodiment of the present invention; and

[0069]Fig. 15 is a photographic representation showing delivery of aggregate from a

spreader box using the actuator assembly of a figure 14 in accordance with a preferred

embodiment of the present invention.

Description of Preferred Embodiments

[0070 It should be noted in the following description that like or the same reference

numerals in different embodiments denote the same or similar features.

[0071] Referring to figures 3 and 4 there is illustrated and described a broad concept flow

and general process of the friction modifying road surfacing apparatus according to the

invention. The apparatus provides, inter alia, a first supply of a first part of a two-part resin;

a second supply of a second part of the two-part resin; and a particulate supply.

[0072]The first part of the two-part setting resin is introduced and mixed with a controlled

quantity of the particulate supply to provide a homogeneous liquid particulated first part.

The liquid particulated first part is subsequently mixed with the second part to form a

settable particulated two-part setting resin. The settable particulated two-part setting resin

is dispersed by gently flowing the resin from a resin bar 17 downstream onto the road

surface. The coarse aggregate is dispersed in a following manner so as to overlay the

settable particulated two-part setting resin.

[0073]As shown in Fig 5 the effect of the invention is to provide an increased friction road

such that a vehicle travelling in a forward direction encounters higher friction from the

road surface so as to give superior grip by the tyres and minimize skidding or sliding and

therefore This is achieved by the presentation of the course surface of the aggregate

forming a macrotexture as well as the relative heights of adjacent differently sized coarse

aggregate forming a macrotexture. The self-levelling two-part epoxy resin and

combination of the coarse aggregate when used in the invention creates this improved

result.

[0074] Referring to figures 6 and 7, there is shown a schematic representation of a friction

modifying road surfacing apparatus 1 having resin tanks 2 and 3 on a load cell 4 located

on a working platform 5. The tanks can be box like tanks adjacent each other across the

width of the front of the mobile platform in the form of a 10 to 16-wheel truck. Each tank

can have a tare weight of 900 kilograms and each be able to hold 2000 to 3000 kilograms

separately of Part A and Part B of a two part epoxy resin.

[0075 In the main compartment at the rear of the truck over elongated chassis 6

extending to the rear of the truck and supported by the weight bearing wheels is a store

27 that can hold of the order of 12 tonnes of bauxite being the coarse particulate to be

applied as the top coating of the increased friction road surface. The store 27 of aggregate

such as bauxite, is dispersed into a spreader box 26 overhanging the rear located aft of

the squeegee. The spreader box 26 fed from the store 27 applies an overlaying surface

of aggregate to the resin and filler already installed on the road surface.

[0076]Downstream from the resin tanks 2, 3 on the rear of the working deck 5 there is

located a heating station 7 including LPG gas cylinders and a powder induction silo 8.

There can be temperature regulation by LPG (Liquid Petroleum Gas - or the like) supplied

in LPG tanks and heater 7. The LPG cylinders operate to maintain the resin parts in the

resin tanks 2 and 3 in a liquid flowable form. Further there are product pumps and shear

motor 20, 11 at the rear of working deck 5 that feeds the Part A and Part B material from

the silos 2, 3 and the fine powder particulate from the powder induction silo 8.

[0077] Extending from the working deck 5 along the elongated chassis 6 to the rear of the

truck are two resin components supply hoses 10, 10a merging at Y junction 12 into a

static mixer 13 feeding to product distribution tanks 15 feeding manifold 16 for dispersal

by the resin bar 17 directly on the ground.

[0078]Also extending along the elongated chassis 6 are xylene flush tanks so as to hold

and supply sufficient flushing liquid containing xylene so as to effect cleaning of product

distribution tanks 15.

[0079] Referring to Figure 8, the apparatus further includes a mixing station 9 (refer figure

7) and resin supply lines 10 and 1Oa extending along and supported by a longitudinal drip

tray 14 protecting against resin spills. The mixing station 9 introduces powder from the

silo under pressure to a first supply of a first part (part A from resin tank 3) of a two-part resin and as shown in figure 7, the part A of the two-part resin mix and powder component of fused silica is subject to blending 11 before being pumped to supply line 10a. Similarly, a second supply of a second part (Part B in resin tank 2) of the two-part resin is supplied under pressure by pump 20 towards supply line 10.

[0080]The apparatus provides a y-junction 12 in the supply lines which allows combining

of resin supply lines 10 and 10a and flows into a static mixer 13. Supply of resin part A

and powder mix and resin Part B to the y-junction 12 is controlled by valve members 21

and 22 respectively.

[0081]The apparatus provides a first supply of a first part of a two-part resin; a second

supply of a second part of the two-part resin; a particulate supply; a first mixer for mixing

the first part of the two-part setting resin with a controlled quantity of the particulate supply

to provide a substantially homogeneous liquid particulated first part; a second mixer for

mixing the liquid particulated first part with the second part to form a settable particulated

two-part setting resin; and a disperser for dispersing the settable particulated two-part

setting resin.

[0082] The apparatus further includes resin distribution tanks 15 downstream from the

static mixer 13 which pumps combined resin parts A and powder mix and part B under

pressure to a dispersion module which distributes the incoming fluid stream into parallel

streams for subsequent discharge from a manifold 16 and/or a resin bar 17.

[0083]The manifold 16 as best seen in figure 9, includes an array of outlet nozzles 25 for

egress of combined resin onto a road surface. Alternative spreading means is shown in

figures 10 to12, where there is shown a resin bar 17 having multiple spaced apart inlet

ports 55 interconnected to feed lines 56 attached to the distribution tanks 15. The resin

bar 17 is connected to a height adjustment bar 57 adjustable by actuator arms 24. The

actuator arms 24 are raised and lowered by pneumatic cylinders.

[0084]As shown in figures 11 and 12, the resin bar includes an internal deflector plate 59

and a dispensing plate 60 mounted below the deflector plate. The deflector plate is

configured to receive resin fluid from the dispensing tanks through 90 degree inlet port 55

in the direction of arrow A. The deflector plate disperses incoming resinous material

laterally along the resin bar. The deflector plate includes spaced openings 62 therein so

that at a predetermined level of resin, resin exits the opening along the length of the bar

onto the dispensing plate 60. As shown in figure 13, resin flows through a longitudinal

opening 61 in the resin bar onto the dispensing plate 60 to provide a substantially even

flow of resin across the width of the resin bar and therefore even surface. The resin bar

can include a squeegee which trails the spraying of liquid resin.

[0085]The dispersion module including resin bar 17 lays resinous fluid on a surface

across the resin bar evenly so that resin is applied to the road surface at the speed of the

truck at a substantially consistent thickness. The ability to effectively introduce a powder

to Part A and subsequently to Part B, extends the body of epoxy resin providing greater

surface coverage and improved holding of the resin on steep inclines and declines before

spreading aggregate.

[0086]As shown in figures 14 and 15 the rear of the system includes an actuator assembly

63 comprising attachable retractable cross members 64 and a series of movable arms 65

which operate pneumatically to control flow of aggregate 66 from the spreader box 26.

[0087]The apparatus further includes an integrated cleaning system 18 for flushing and

recirculating a solvent cleaning agent such as xylene. In an operating mode, a storage

tank for xylene is provided and a pump is actuated to drive xylene through the resin lines,

distribution tank, manifold and resin bar. A flush return pump 19 controls the xylene flush

through the resin bar and returns waste solvent to a xylene waste flush tank.

[0088]The integrated cleaning system prevents hardening of the resin throughout the

dispersion module and particularly in the manifold and resin bar which would otherwise

require substantial effort to clean. The cleaning system also allows the continued use of

the road surfacing system as opposed to prior art off road maintenance for removing

solids before being able to be used again.

[0089]The Apparatus includes a control system having an inline flowmeter, temperature

sensors, one way valving to prevent backflow pressure, pressure sensors so that for

example pressure can be monitored and controlled within operating pressures.

[0090]Advantageously the apparatus is able to introduce a powder into the liquid resin

and also have the ability to colour tint the resin to suit the application of CST. Production

rates of installation range between about 3000m2 to 5000m2 per hr. In achieving this

faster more productive installation there is an economic advantage in addition to providing

a veneer surfacing system that can save lives, increase road user's safety as well as

increase in safety and longevity of the asphalt substrate.

[0091]The ability to introduce a powder filler during an installation or in preparation for an

installation, produces a massive cost saving as it practically extends the resin giving

greater coverage. Further, the ability to use a powder filler allows filling of voids, fissures

and fractures in road surface, which aggregate alone cannot do.

[0092]The ability to clean pumps, mixers, tank, manifold, resin bar means that the

apparatus can be ready for a second installation on the road. In addition, this obviates the

problems of resin setting in the equipment and the need to dispose of replace equipment

thus requiring time off the road for substantial maintenance.

[0093] So, the major differences of the invention includes the technology that controls the

mixing pumps / spreader box / actuator arms that raise and lower the squeegee bar to the road. As well as controlling the internal flushing system that cleans the pumps spray bar and static mixer / distribution tanks.

[0094]The ability to introduce powder into liquid at various rates all controlled by the

hardware and software that we have worked on to make this apparatus an advantage

over prior art. The resin tanks can be synchronized to the computers via load cells to

ensure we are as accurate as we can possibly be.

[0095]The apparatus also includes 360-degree visibility via cameras that have capability

to record back to a remote location in the truck that can be centrally accessed in the event

of any incidents onsite. The apparatus includes RFID technology that allows an operator

to leave the apparatus unattended and running but secured to prevent someone from

driving it away. RFID security components include a swipe bracelet that the operator

wears to swipe in and out of the cabin. This can also be monitored in real live time on

software back at a central/head office.

[0096]The cabin air is filtered by external Hepa grade filters ensuring the operators air

quality is the best it can always be. Emergency park brake application if operator leaves

cabin and forgets to apply brake truck will automatically apply and stop vehicle rolling

away.

[0097] Reverse sensor technology is also included that senses when people are in a crush

zone and applies the brake in forward and reverse.

[0098]Fatigue Monitoring system installed to alert if a driver needs to pull over and rest

this is an alarm that goes off in the truck if any Micro Napping occurs.

[0099]The apparatus includes a vehicle monitoring system that monitors vehicle

component such as tyres and other components and reports them via a live feedback to

a central/head office. Led 'No Go Zones'are also included which light up areas in red that

are no people zones and workers on foot zones are green led zones.

[00100] All the above is done via touch screen technology that drives the tech and

the automation of the installations that can be fed back to the office via direct live feed in

real time or at the completion of the job via email link that provides all of the QA required

for the installations at hand.

[00101] PROCESS

[00102] Material

Product Purpose Maximum Maximum Primary DO UNNumber Onroad Road Marking Standard class and Packing Vol Volume Group Oz Grip EP Epoxy Resin 2000kg 2610L (3t) AS 2809.4:2017 9 Un 3082. Ii 176(Part A) Part A Oz Grip EP Epoxy Resin 2000kg 3000L (3t) AS 2809.4:2017 8 UN 2735. 11 175 (Part B) Part B Xylene Flush/ 220L 2 x 220L (2x AS 2809.3:2017 3 UN 1307,i1 Cleaning (200kgs) 200kgs) LPG Resin 2x 45kg 2x 45kg bottles AS 2030.1:2009 21 UN 1075, Heating bottles N/A Bauxite Aggregate 12t 16m2 - Non- Aggregate DG Sillica 200G Resin Filler 0 m2 2m- - Non- Powder DG

[00103] Part A in one embodiment is an Epoxy Resin Compound.

Chemical Name % OSHA PEL ACGUH TLV Propane, 2,2-bis[p-(2,3- >80% NE NA epoxypropoxy)phenyl]-, polymers Aliphatic Glycidyl Ether <20% NE NE

Appearance: Clear to light amber Physical State Boiling Point: Liquid ND Odor: Mild Freezing/Melting Point: ND/NE pH: ND Solubility: Insoluble Vapor Pressure: NE Vapor Density: (Air= 1) > 1 Spec Grav./Density: 1.19 VOC: 0 Evap Rate: Slower than Butyl Acetate Percent Volatile: 0 Flash Point: >2000 F Flash Point Method: Pensky Martens

[00104] Part B in one embodiment is Polyamine as an Epoxy Bonding Agent.

Chemical Name % OSHA PEL ACGUH TLV Nonylphenol >30% NE NA Aminoethylpiperazine <25% NE NE Polyoxypropylenediamine <25% NE 2,4,6 Tri (dimethylaminomethyl) <20% 10 mg/m3 5 mg/m3 phenol

Appearance: amber Physical State: Liquid Boiling Point: ND Odor: Amine Odor Freezing/Melting Point: ND/NE pH: ND Solubility: Insoluble Vapor Pressure: NE Vapor Density: (Air= 1) > 1 Spec Grav./Density: 0.97 VOC: 0 Evap Rate: Slower than Butyl Acetate Viscosity 80cps Percent Volatile: 0 Flash Point: >2000 F Flash Point Method: Pensky Martens

[00105] Fine Particulate Powder used is in one embodiment a particulate fused

silica. Using filler powder, it gives more volume of resin and also assists in filling

cracks and voids in the surfacing applied to. It assists in resisting unwanted flow of

the resin which allows even distribution even on steep roads. The system uses

powdered silica (filler) which is blended to have a smooth homogenized blend applied

to the road and then dress this binder with bauxite aggregate 1-3mm

[00106] Our truck uses a silica flour as fine particulate which is introduced via

powder silo into Line A of the part A resin material and it is then pumped through a

shear pump and blended. It is then sent down the line to a static mixer where the

hardener is introduced once it has passed through the mixer it enters distribution tanks

that level out via infra-red sensors. These tanks supply the distribution manifold which in one form has 8 pneumatically controlled valves that can be opened at varying degrees dependant upon the volume of material required. This is then fed into the resin/squeegee bar that distributes a ribbon of resin onto the substrate leaving a film of binder for overlaying the aggregate from the spreader fed from the hopper store to spread the stone evenly over the surface. The stone spreader also has no hydraulics or moving augers but has air-controlled gates that feed a hopper box and which can be opened or closed these as required dependent on the rate of aggregate required.

[00107] Resin production rate on mobile truck is:

Minimum of 80kg/min Maximum of 300kg/min Part A - 27.6L/min Part A - 92L/min Part B - 30L/min Part B - 1OOL/min

[00108] Coarse particulate used is calcined bauxite. This is used as Bauxite is a

natural, very hard mineral used predominantly in road systems for its high friction and

antiskid properties. It is an aggregate formed from aluminium ore which has been subject

to calcination, a high intensity heat treatment process (between 1200°C - 1800°C). It is

obtained by calcinating superior grade bauxite at a high temperature, which removes

moisture, thereby increasing the alumina content. The alumina content of raw bauxite is

approximately 57- 58%, whereas calcined bauxite has an alumina content of 84-88%.

[00109] When calcined, bauxite has exceptional physical hardness and stability,

leading to excellent resistance to abrasion caused by a vehicle's tyres and a high

resistance to shear stresses that lead to polishing. As it is an extremely hard aggregate,

it retains the sharp edges produced at the time of crushing; this property greatly enhances

skid resistance.

[00110] Once a high friction treatment has been installed, the calcined bauxite is

designed to microfracture - meaning that when the aggregate has excessive force applied, it will splinter. These calcined bauxite shards means that the surface maintains optimal surface friction throughout the design life of the treatment, ensures the stone cannot be polished smooth, resulting in a re-occurring slippery surface and keeps maximum friction contact between tyre and road. These factors make it ideal for high friction applications.

[00111] This quality is unique to calcined bauxite and its benefits are made available

by the use of the system of the invention and therefore make it a far superior system to

other systems using road surfacing aggregates.

[00112] PROCESS 1: FILLING/ EMPTYING

This process covers the filling of the tanks with resin, powder hopper and aggregate bin

[00113] Part A & B Tanks

1. Truck is parked, and wheel chocks installed.

2. Tank Manway is opened (Engaging truck drive away protection system via

interlock on many way).

3. IBC (Intermediate bulk containers - usually palletised and exoframed 1000 litre

plastic containers) is lifted via a forklift, fill hose is connected to IBC and

inserted into manway.

4. IBC valve is opened and contents are gravity fed into the tank.

5. Tank fill levels are monitored by weight (load cells) and by monitoring the volume

emptied from the IBC.

6. Sets 3-5 are repeated with additional IBCs until tanks are filled.

7. IBC hose is removed, Tank Manway is closed.

Note: tanks are only to be filled to 2000kg before traveling on road, excess product can

be carried in IBC's on the trailer allowing the tanks to be filled to 3000kgs when on

controlled job sites (not on public roads).

Tanks should never require emptying during normal operation, to empty, contents are

sucked out using a suction pump.

[00114] Powder Silo

1. Truck is parked, and wheel chocks installed.

2. Silo lid is opened (Engaging truck drive away protection system via interlock on

lid)

3. Bulk bag of powder is lifted above fill point using a crane.

4. Contents are released from bulk bag by operator on working deck (PPE including

a respirator is to be warn) and flows under gravity into silo.

5. If required silo is topped up using 20kg bags of powder.

6. Volume in hopper is visually monitored by operator.

7. Silo lid Is closed. Silo should never require emptying during normal operation, in

the event contents are required to be removed, remove with a vacuum system

with adequate filtration and storage capacity.

[00115] Aggregate bin

[00116] This filling of the aggregate tipper is covered by standard operating

procedures

[00117] Xylene Flush

[00118] Filling

1. Truck is equipotential bonded to the fill vessel

2. Truck fill point dry brake coupling is connected to xylene drum (Engaging truck

drive away protection system via interlock).

3. PLC uses transfer pump to suck xylene into clean tank until tank is full.

4. Dry brake coupling is disconnected

[00119] Emptying

1. Truck is parked, and wheel chocks installed.

2. Truck is equipotential bonded to catch tank

3. Drain hose Is fitted to drain point via dry break coupling (Engaging truck drive

away protection system via interlock).

4. Discharge valve is opened,

5. Contents drains out under gravity

6. Discharge valve is closed and drain hose is disconnected.

[00120] PROCESS 2: ROAD MARKING

Driver is to remain at controls during all stages of road marking.

1. Park truck in site set up area.

2. Appropriate resin head is fitted to rear of truck.

3. PLC is put into road marking configuration engaging Hydrostatic Drive (PTO

mode).

4. Resin heating system is enabled by PLC and turns on, heating resin tanks to 40°C

±5°C. Heating is only used to preheat resin while truck is stopped. Roll away

protection system is engaged while resin heating system is turned on.

Handbrake interlock.

5. Manual shut-off valves are opened.

6. System is turned on, process valves open and pumps draw Part A and Part B

resins at a mass ratio of 1 to 1

7. If applicable, Powder hopper valve is opened, allowing powder to flow into A line,

ratio is dependent of job specifics.

8. Powder and product A are mixed at the shear pump.

9. A and B lines flow through the static mixer combining and starting an exothermic

reaction causing the resin to begin setting.

10. Mixed resin flows into the distribution tank. Holding tank level is controlled by

throttling part A and B pumps to maintain consistent level.

11. Distribution tank is pressurised, and resin head valves are opened pushing resin

into the resin head.

12. Resin flows out of the resin head and is applied to road surface.

13. Driver drives forward via cabin controls, operating truck speed and resin

application are controlled by PLC system, operator standing at the rear left of

the truck and drive monitor application. (Max speed 5 km/hr controlled via

hydrostatic drive)

14. Tipper body tips up and drops aggregate over resin film via the spreader box.

15. Process continues until road marking is finished or truck is empty.

16. Product lines are purged via compressed air.

17. Manual shut-off valves are closed, PLC shuts down Process lines and resin

heating system.

18. Once road marking finished the truck is cleaned via process 3.

[00121] PROCESS 3: CLEANING/FLUSH

1. Truck is parked, and wheel chocks installed.

2. Resin head is placed into flush head

3. Flush head drain is connected to Xylene return line and pump via dry brake fitting

4. PLC is put into Cleaning mode. Isolating resin heating system and engaging/

ensuring drive away protection is engaged.

5. Flush valves are open, flush and flush return pumps Xylene through the product

lines removing resin build up and residue.

6. Xylene is filtered and returned to holding tanks.

7. Once required time has elapsed flush cycle is finished (3m cycle).

8. PLC xylene outlet Valve, and Xylene is purged from system via air purge line and

returned to flush tank.

9. Flush Valves are closed, and PLC turns off cleaning mode.

10. Resin and flush heads are removed and stowed.

[00122] PROCESS 4: ON ROAD CONFIGURATION

1. Truck PLC is put into on road configuration, closing all process, flush and heating

system valves, and Isolating drives and heating system ignition.

2. Manual valves are checked to ensure they are closed.

3. Truck contents are checked by operator to ensure on road levels are not

exceeded.

4. Truck is driven on road as per standard practice.

[00123] HIGH FRICTION

[00124] High friction surfacing of the invention, also known as antiskid treatments is

a pavement surfacing systems that uses calcined bauxite which has been bonded to the

pavement surface using a resin. It is primarily engineered and designed to reduce

skidding related incidents, reduce vehicle stopping distances and therefore threshold

impact speeds. The system used is designed to ensure the skid resistance value remains

at the required level for the entire design life. The resin must hold the aggregate

permanently in position and not dislodge even under the heaviest of braking and must be

of a proven performance level. This not only ensures the system is the safest but that it

also obtains the best value, in terms of both monetary and longevity gains.

[00125] The surfacing has been designed to dramatically increase pavement friction

and uses a flexible 2-part, cross linking, self-levelling epoxy system which has an

excellent bond to the designated surface it is applied to. It is a relatively simple, cost

effective solution that increases skid resistance, which in turn helps motorists maintain more control in both wet and dry driving conditions.

[00126] Various reasons require the treatment of high friction, whether through

asphalt bleeding and polishing, steep short declines or pavement age, the friction property

of asphalt surfacing decreases to a point where the pavement surface becomes slippery.

This is measured by PSV or polished stone value. It is the measure of how resistant an

aggregate is to polishing under traffic wear. The higher the PSV, the better the aggregate

can keep its surface texture or micro texture. Our surfacing is well above Australian

Standards for PSV and has proven statistics in accident reductions.

[00127] APPLICATION BENEFITS

e Suitable for applications on asphalt, chip seal, concrete and steel

• Free of carcinogenic, solvent and aromatic oils

e Can be coloured for Delineation purposes

e Can be installed during short closures of 2-4 hours

• Provides a solution for restoration of skid resistance on existing surfaces

• Line marking can be applied directly to the surface or existing lines can be preserved

during installation

• Prolongs the life of the substrate

• Cost effective Treatment compared with removal and replacing existing surface

• High design life

e Proven accident reduction and collision Impact speeds

[00128] The system works at the intersection of technology, data and human

ingenuity to deliver quantifiable performance advantage to key sectors in need of large

scale change; Road User Safety, Road Network Expansion and Technological

Advancement. By mitigating the risk to roadwork crews, The system provides rapid production rates of installation, equating to 3000m2 - 5000m2 per hour, when compared to manual installation rates of 1500m2 per day. The system requires 4 fully trained operators to ensure optimal performance, whereas previously a minimum of 7 workers were required to manually do the same. This not only is a faster more productive outcome for clientele but the decreased presence on a road environment also benefits workers, traffic controllers and all road users.

[00129] The system also delivers advantages through being a state-of-the-art

technology system. From class leading safety critical control systems, the system

empowers ability to create differentiation and seize installation advantages. Synchronized

computers communicate directly in the system, ensuring optimal accuracy, application

controls and itemised application information. 360 degree visibility cameras are always

recording, with information stored in the black box, RFID driver technology, tyre

monitoring systems for both truck and trailer, emergency truck park brake fail safe/ anti

rollaway system, reverse sensor tech in forward and reverse, fatigue monitoring systems,

vehicle monitoring systems, centralised automatic lubrication systems for both truck and

trailer, and LED coloured work/safe zones are some of the incorporated safety features

which prevent injuries and increase operator safety.

[00130] Harnessing these unique capabilities, the system is operated via touch

screen technology, which drives the automation of the installation. All data is fed back to

head office, which can be accessed via direct live feed in real time or at the completion of

a job via a satellite link. This provides clientele with all necessary QA for any installation

at any time.

[00131] The system provides a unique approach to create inspired outcomes, not

just for our clientele or workforce but ultimately for the road user with minimal disruption

to the general public.

[00132] Interpretation

[00133] Embodiments:

[00134] [0043] Reference throughout this specification to "one embodiment" or "an

embodiment" means that a particular feature, structure or characteristic described in

connection with the embodiment is included in at least one embodiment of the present

invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment"

in various places throughout this specification are not necessarily all referring to the same

embodiment, but may. Furthermore, the particular features, structures or characteristics

may be combined in any suitable manner, as would be apparent to one of ordinary skill

in the art from this disclosure, in one or more embodiments.

[00135] Similarly it should be appreciated that in the above description of example

embodiments of the invention, various features of the invention are sometimes grouped

together in a single embodiment, figure, or description thereof for the purpose of

streamlining the disclosure and aiding in the understanding of one or more of the various

inventive aspects. This method of disclosure, however, is not to be interpreted as

reflecting an intention that the claimed invention requires more features than are

expressly recited in each claim. Rather, as the following claims reflect, inventive aspects

lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims

following the Detailed Description of Specific Embodiments are hereby expressly

incorporated into this Detailed Description of Specific Embodiments, with each claim

standing on its own as a separate embodiment of this invention.

[00136] Furthermore, while some embodiments described herein include some but

not other features included in other embodiments, combinations of features of different

embodiments are meant to be within the scope of the invention, and form different

embodiments, as would be understood by those in the art. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[00137] Different Instances of Objects

[00138] As used herein, unless otherwise specified the use of the ordinal adjectives

"first","second", "third", etc., to describe a common object, merely indicate that different

instances of like objects are being referred to, and are not intended to imply that the

objects so described must be in a given sequence, either temporally, spatially, in ranking,

or in any other manner.

[00139] Specific Details

[00140] In the description provided herein, numerous specific details are set forth.

However, it is understood that embodiments of the invention may be practiced without

these specific details. In other instances, well-known methods, structures and techniques

have not been shown in detail in order not to obscure an understanding of this description.

[00141] Terminology

[00142] In describing the preferred embodiment of the invention illustrated in the

drawings, specific terminology will be resorted to for the sake of clarity. However, the

invention is not intended to be limited to the specific terms so selected, and it is to be

understood that each specific term includes all technical equivalents which operate in a

similar manner to accomplish a similar technical purpose. Terms such as "forward",

"rearward", "radially", "peripherally", "upwardly", "downwardly", and the like are used as

words of convenience to provide reference points and are not to be construed as limiting

terms.

[00143] Comprising and Including

[00144] In the claims which follow and in the preceding description of the invention,

except where the context requires otherwise due to express language or necessary

implication, the word "comprise" or variations such as "comprises" or "comprising" are used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.

[00145] Any one of the terms: including or which includes or that includes as used

herein is also an open term that also means including at least the elements/features that

follow the term, but not excluding others. Thus, including is synonymous with and means

comprising.

[00146] Scope of Invention

[00147] Thus, while there has been described what are believed to be the preferred

embodiments of the invention, those skilled in the art will recognize that other and further

modifications may be made thereto without departing from the spirit of the invention, and

it is intended to claim all such changes and modifications as fall within the scope of the

invention. For example, any formulas given above are merely representative of

procedures that may be used. Functionality may be added or deleted from the block

diagrams and operations may be interchanged among functional blocks. Steps may be

added or deleted to methods described within the scope of the present invention.

[00148] Although the invention has been described with reference to specific

examples, it will be appreciated by those skilled in the art that the invention may be

embodied in many other forms.

[00149] Industrial Applicability

[00150] It is apparent from the above, that the arrangements described are

applicable to engineering industries and particularly the macro surface coating industries

such asroadway surfaces.

Claims (33)

Claims The claims defining the invention are as follows:

1. A friction modifying road surfacing apparatus including a mobile platform for

supporting and transporting to site a plurality of interactive modules comprising: a) A storage module having a plurality of silos for storing separately components of a two-part setting resin and a fine particulate, and a

coarse particulate road covering material; b) A mixing module connected to the storage module for receiving and mixing the separate components of the two-part setting resin to effect activation of the two-part setting resin

c) A dispersion module having: a. a first part for receiving the activated two-part setting resin and

feeding to one or more dispersing outlets extending across a rear

portion of the mobile platform to effect a continuous layer behind

the mobile platform; and b. a second part for dispersing behind the first part the particulate road covering material over the activated two-part setting resin to effect

a road surface; d) A control module for controlling the flow, mixing and dispersion in coordination with the movement of the mobile platform; e) A cleaning module for cleaning the residue of the activated two-part

setting resin from at least the dispersion module to prevent fouling and allow use directly at another site.

2. A friction modifying road surfacing apparatus according to claim 1 wherein the mixing module receives and mixes one of the two-part setting epoxy resin with a fine particulate in the form of a powder before mixing with the other of the two-part setting resin.

3. A friction modifying road surfacing apparatus according to claim 1 wherein the

mixing module is able to draw stoichiometric quantities of resin components and

powdered binder determined by the on board PLC computer systems software in

accordance with the motion of the dispersing.

4. A friction modifying road surfacing apparatus according to claim 1 wherein the

mixing module

5. A friction modifying road surfacing apparatus according to claim 2 wherein the fine

particulate or powder gives the epoxy more body allowing it more coverage and

when used in the correct manner at the right ratio to aid holding the resin on steep

inclines or steep declines.

6. A friction modifying road surfacing apparatus according to claim 2 wherein the

powder is silica.

7. A friction modifying road surfacing apparatus according to claim 1 wherein the first

part of the dispersion module includes a resin receiving tank and manifold, the

manifold being operable to receive a quantity of resin binder mix from the tank and

move between a receiving mode and dispensing mode close to a road surface,

wherein the resin/binder provides greater flow properties and improved road

surfacing of holes and voids and wherein the manifold is fully on the fly adjustable

to enable accurate dispensing of the resin binder mix.

8. A friction modifying road surfacing apparatus according to claim 1 wherein the

control module controls the mixing module and dispersion module in coordination

with the movement of the mobile to effect a dispersion coverage of about 3000m2

to5000m2 perhr

9. A friction modifying road surfacing apparatus according to claim 1 wherein the

cleaning module feeds a cleaning solution into at least the dispersion module after

operation.

10.A friction modifying road surfacing apparatus according to claim 1 wherein the

cleaning solution is a solvent including xylene.

11.A friction modifying road surfacing apparatus according to claim 10 wherein the

cleaning module is a recirculating cleaning system having a store of cleaning agent

adapted to flush through the working components of the apparatus including

pumps, line, resin tank and manifold and flush remove plaque therefrom and

return line to a recovery tank, wherein the apparatus can be substantially

maintained and wherein the return line is doubled filtered to remove contamination

so xylene can be re-used.

12.A friction modifying road surfacing apparatus comprising:

a) A mobile platform;

b) A first silo compartment for receipt of a supply of a first part of a two-part

setting resin;

c) A second silo compartment for receipt of a supply of a second part of

the two-part resin setting

d) a fine particulate supply

e) a coarse particulate supply

f) a first mixer for mixing the first part of the two-part setting resin with a

controlled quantity of the particulate supply to provide a liquid

particulated first part

g) a second mixer for mixing the liquid particulated first part with the second

part to form a settable particulated two-part setting resin h) a disperser for dispersing the settable particulated two-part setting resin.

13.A friction modifying road surfacing apparatus according to claim 12 wherein the

two-part setting resin is a thermosetting resin.

14.A friction modifying road surfacing apparatus according to claim 12 wherein the

two-part setting resin is an epoxy resin.

15.A friction modifying road surfacing apparatus according to claim 12 wherein the

two-part setting resin includes xylene.

16.A friction modifying road surfacing apparatus according to claim 12 having a load

cell on the mobile platform.

17.A friction modifying road surfacing apparatus according to claim 12 wherein the

first and second compartments are a plurality of storage silos on the load cell, the

storage silos separately storing resin and binder components forming the first and

second parts of the two part setting resin, wherein at least one of the binder

components is a powder.

18.A friction modifying road surfacing apparatus according to claim 12 having a

heating system for preheating the resin components.

19.A friction modifying road surfacing apparatus according to claim 12 having

pumping means and dispensing means for drawing stoichiometric quantities of

resin components and powdered binder determined by the load cell determined by

an on-board PLC computer system control software.

20.A friction modifying road surfacing apparatus according to claim 12 having a

blending station for receiving first resin component and powder, the blending

station having a shear mixing operation to integrate the powder and the first resin

component.

21.A friction modifying road surfacing apparatus according to claim 12 having a resin

distribution tank and manifold, the manifold being operable to receive a quantity of

the resin powder mix from the distribution tank and move between a receiving

mode and dispensing mode close to a road surface, wherein the resin provides

greater flow properties and improved road surfacing of holes and voids.

22.A friction modifying road surfacing apparatus according to claim 21, further

including a control system for controllably adjusting the manifold to enable accurate

dispensing of the resin system.

23.A friction modifying road surfacing apparatus according to claim 22 further

including a recirculating cleaning system having a store of cleaning agent adapted

to flush through the working components of the apparatus including pumps, line,

resin tank and manifold and flush remove plaque therefrom and return to a

recovery tank by a return line, wherein the apparatus can be substantially

maintained.

24.A friction modifying road surfacing apparatus according to claim 23 wherein the

return line includes a filtration system to substantially remove contamination in the

waste xylene stream so xylene can be reused.

25.A friction modifying road surfacing apparatus according to claim 23 wherein the

recirculating cleaning system includes a main supply tank and a recovery tank,

wherein the main supply tank and a recovery tank are interconnected to enable an

interchange of supply of the xylene therebetween as required.

26.A friction modifying road surfacing apparatus according to claim 25 wherein the

return line is doubled filtered.

27.A friction modifying road surfacing apparatus according to claim 12 having a control

system to provide information about weight of material used and costs and other control mechanisms, i.e. shear rate and viscosity, operation of the resin bar and cleaning system, safety etc.

28.A method of modifying a road surface including the steps of:

a) providing a first part and a second part of a two-part setting resin;

b) providing a particulate supply

c) mixing the first part of the two-part setting resin with a controlled quantity

of the particulate supply to provide a liquid particulated first part

d) mixing the liquid particulated first part with the second part to form a

settable particulated two-part setting resin

e) dispersing the settable particulated two-part setting resin

f) applying aggregate to the dispersed settable particulated two-part

setting resin.

29.A method of modifying a road surface according to claim 28 wherein the step of

mixing the first part of the two-part setting resin with a controlled quantity of the

fine particulate supply includes introduction of powder to a liquid by use of two

pumps to mix this powder into a homogenised blend enabling us to use this blend

at the rear of the truck where it is mixed again with the second part being the

hardener prior to being dispersed onto the road surface

30.A method of modifying a road surface according to claim 29 wherein the step of

mixing the first part of the two-part setting resin with a controlled quantity of the

fine particulate supply includes using pneumatic adjustable valves to control

powder dispersion along with a pneumatic vibrator to keep the powder loose and

free flowing.

31.A method of modifying a road surface according to claim 28 wherein the friction of

the road surface is altered by selection of the particulate sizing and material.

32.A method of modifying a road surface according to claim 28 wherein the friction of

the road surface is increased by selection of the particulate sizing and material.

33.A method of modifying a road surface according to claim 17 wherein the friction of

the road surface is reduced by selection of the particulate sizing and material.