Part 1

Advantages of application of our companys road polymer technologies

The reasons to use Andor

Companys technologies

Saving time and money

High quality

Safety to environment

Sources of efficiency creation

Saving time and money

Each stage of road construction with the application of Andor Companys technologies from the first step to the very end of the process saves your time and money. In this technology application, the available soil becomes the material being used for the construction process. This creates the following advantages:

Local soil does not cost anything.

Reduction of expenses on the use of materials (crushed stone, sand), as well as their transportation.

No expenses on the works on clearing soil.

Reduction of the amount of excavation work.

Reduction of construction duration.

High qualityApplication of polymer stabilizer of soil allows to increase the durability

of road bed and reduces the expenses on the maintenance and repair

work of the motorways built with this technology application, as the

application of the soil stabilization technology eliminates the main

causes of road surface destruction, namely:

swelling of earth road bed body and its working layer caused by

water- and frost;

low moisture protection of road bed from soil waters;

weak soil road bed working layer;

silting of drained, frost-protecting layers of sand;

low stability to shifts of road clothing sand layers.

All these cause elimination results in increasing the term of road

surface overhaul service life.

Safety to environment

Road polymer is neither toxic nor inflammable. This makes the construction method with the application of Andor Companys technology absolutely safe for environment and people.

The technology aggregates the available materials in the same way as recycled materials (of available structure) on the construction site in the best possible way. No need to bring construction materials from remote areas. In this way, the road construction system with the application of Andor Companys innovative technologies saves natural resources.

Sources of efficiency

creation Saving materials

Saving man hours

Reduction of construction times

Utilization of local soil

Utilization of local production wastes

Saving road maintenance expenses

Services we offer Full technological solution:

Selection and calculation of required

structure

Aid in economic substantiation

Technology

Material (road polymer)

Support in technological process

Building roads in the cheapest, fastest and

most efficient way, with the application of the

latest advanced technologies.

Part 2

Technological process

STABILIZATION

What is stabilization

Process of improving the engineering properties of

natural soils ( such as load-bearing capacity,

resistance to one axis pressing, filtering properties

and others) by adding small amount of ingredients

How is stabilization achieved ?

* Stabilization is usually created directly on the site

* Sometimes it is created in stabilization center.

STABILIZATION Advantages of the method* Minimal use of chemical additives

* Efficient and fast construction of soil bedding and road bed

* Saving power

* Protection of environment

* Possibility to use local natural materials and salvage

* Reduction of sensitivity to moisture changes (swelling potential, stability to erosion and others)

* Technological process is researched in-depth

POLYMER What is polymer emulsion ?* Foam white water-soluble thick liquid, non-toxic

and neutral to environment

* Chemically polymeric emulsion produced on the basis of polymers and co-polymers of various compositions

Some physical properties

Boiling threshold 100 C

Specific weight @25 C 1.00 1.02

Viscosity @25 C 1,200 2,000 cps

Solubility in water Easily soluble

Acidity pH @25 C 11.0 12.5

POLYMER Polymer application

* Polymer mixture is used as soil stabilizer * Soil stabilization is achieved by means of changing

the natural properties of soil * Provides the opportunity of designing elasticity and

plasticity modules, as well as strength properties* Experience and latest research proves the

advantage of soil stabilization modifier over artificial soil application

POLYMER Flaws of conventional chemical

stabilizers * Cement, slaked and live lime, ashes and some other materials are

conventional chemical stabilizers having cementing properties.

Cementing additions are used have been used worldwide in the

road construction since the 1930s.

Their applications allows to improve significantly the engineering and

operational properties of soil materials, such as strength in

consolidation, resistance to pressure, resistance to shifting,

reduction of potential for swelling and slump.

* However, the soils stabilized by means of the application of traditional

chemical stabilizers, often have low resilient and elastic properties,

high water permeability, disposition to formation of cracks.

In particular, this is applied to the most common type of mixtures those of soil and cement.

POLYMER How does Polymer achieve soil

stabilization ?

* Elasticity module increases due to joining the soil particles covered with cement, with a variety of polymer chains

* During the process, the moisture-accumulating capacity is utilized

* Protects soil framework from the harmful effects of soil chemical components, such as sulfates.

* Prevents filtration and movement of capillary waters

* Reduces the effect of water migration which is one of the main causes of road surface wear

POLYMER

Polymer micro junctures

Soil particles Cement Soil particles

Chemically active elements

Polymer covering

POLYMERWater shortage in the process of conventional soil

stabilization

Mixture of soil and cement Cracks

PH- overcoming the problem of water shortage in soil

Thin polymer film No

cracks

POLYMER

Capillary action soaking

into the mixture of soil

and cement

Free water circulation Blocked water circulation

Soil-Cement SurfaceMicro pores

PC-SoilsSurface

Reduction of soaking into

PC-SOILS

POLYMER What is polymer-cement modified soil?Adding 5-10% of polymer (from the weight of cement) creates, at the

construction site, the mixture which, after its consolidation, and forms elastic plate with high module of plasticity and resiliency , which also has improved mechanical properties successfully bearing the road surface use regimes. PC-SOILS

Natural soilCement -

from dry soil weight

Polymer - %

from cement weight)PC-SOILS

Polymer-Cement Soil Used units Calculation Amount

Dry soil 1 cubic meter (consolidated) = 1 x 2,000 = 2,000 kilograms

Needed amount of cement 5% = 2,000 x 5/100 = 100 kilograms

Polymer 5% = 100 x 5/100 = 5 litres

CONCLUSIONS Polymer-cement stabilization (or PC-SOIL) is an efficient, well-

researched process of improving the engineering properties of

natural soils. In fact, modified soil is the mixture of local

natural material, polymer additive, cement and water, which,

after consolidation and gaining solidity, turns into solid

construction material.

Intensity of traffic, increase of cargo transportation,

introduction of heavy dump trucks bearing high axis loads,

raising requirements to the road surface quality makes the

application of the stabilization technology not only desirable,

but also necessary

This method fits better for pavement construction, road

surface restoration and recycling some industrial wastes.

CONCLUSIONS Logistics of technological process optimization, technological

regulations design, designing main engineering and technical

properties (load-bearing capacity, module of resiliency,

resistance to fatigue and erosion and so on), as well as the

economic effects, are calculated after performing full-scale

exploration works

If partial mechanization, as a simpler method which is easier

to access, fits more for the construction or restoration of road

bed in rural or remote areas, in the construction of big

highways, runways and similar structures, full process

mechanization is preferable where high degree of road

surface homogeneity is obtained due to more efficient mixing

process

Stages of calculating load-

bearing polymer-soil pad

START

Laboratory checks

Geotechnical prospecting

Soil sampling

Results

DESIGN **

CONSTRUCTION

FINISH

NO PEAT

PEAT

Required soil checks

Natural moisture

Granule measurement

Limits of plasticity and fluidity

Sulfate content

Organic material content

Maximal consolidation / optimal

moisture

(Modified Proctor Method)

Stability to erosion

Load-bearing capacity

** Design Method Used :

Equivalent layer method

(TA) - Pavement Design

END

Stabilization procedure of soil pad by

means of polymer-cement technology

Step Marking for cement dispersion in

accordance with the planned ratio

Step Dispersion of the required amount of

Portland cement

Step Rough mixing of cement with local soil

by means of gradersStep Thing mixing soil with cement

Stabilization procedure of soil pad by

means of polymer-cement technology

Step Dispersion of polymer emulsion Step Mixing soil and cement mixture with

polymer emulsion by means of grader

Step Consolidation of each layer up to

required densityStep Consolidation with pneumatic tire roller

and flatting by means of 2-rolling press road roller

Stabilization procedure of soil pad by

means of polymer-cement technology

Step Marking the area undergoing stabilization Step Loading cement-polymer mixture into stabilizer

machine

Step Repeat pass of RECYCLING MACHINEStep Mixing upper layer of the processed soil with

polymer-cement mixture at the intended depth

Stabilization procedure of soil pad by

means of polymer-cement technology

Step Consolidation of each layer up to

required density

Step Moistening the processed

surface within 3-7 days

Step Road bed after processing Step Conducting checks for the extent of

consolidation