RU2306381C1 - All-weather ground composition for equestrian sport facility - Google Patents

Abstract

FIELD: pavings or foundations specially adapted for playgrounds or sports grounds, particularly ground for racecourses, show jumping fields, indoor and outdoor riding-house structures.

SUBSTANCE: all-weather ground composition includes quartz sand, fiber materials, elastic fillers and binding agent. The fiber materials comprise polyester polymer, namely lavsan, having fiber lengths of 1-8 mm, polymeric material layer, namely polyvinylchloride, applied thereto and cordage lavsan fiber having fiber lengths of 5-30 mm. The elastic filler is rigid synthetic polypropylene fibers of 15-40 mm lengths, grinded geotextile web used as pieces having 0.5-3.0 cm² surface areas and granular elastic filler, namely rubber crumb with 1.0-15 mm particle dimensions. The binding agent is structural surface modifier, which provides bulk density decrease, decrease of maximal density during ground compaction, absolute deformation and absolute residual deformation increase and necessary water-permeability. Above components are taken in the following amounts: quartz sand - 70-95%, polyester polymer, namely lavsan, with polyvinylchloride layer - 0.5-4%, cordage lavsan fiber - 1-5%, rigid synthetic polypropylene fiber - 0.05-0.2%, grinded geotextile web particles - 0.05-0.2%, structural surface modifier - 2-10%, remainder is rubber crumb.

EFFECT: elimination of prior-art disadvantages, reduction of residual deformation, increased recoverability and all-weather ground covering uniformity, improved usage properties in wide temperature range, decreased dust formation during ground covering usage, reduced height of ground fragment rebound and, as a result, increased safety.

3 cl, 1 tbl, 1 dwg

Description

1. The technical field

The invention relates to compositions for coating racing and running racetracks, competitive fields, open and closed equestrian arenas.

2. The level of technology

A known composition for coating sports facilities (SU No. 1691375, IPC C08L 75/00), including mineral filler, additives that regulate physical and mechanical properties, and a binder.

However, such a composition does not exhibit shock absorbing properties when laid in a coating.

A known composition for coating sports facilities (AS No. 609819, IPC E01C 13/00), comprising a filler and a binder.

The disadvantage of this composition is the limited temperature range during operation of the coating of the specified composition.

A known composition for coating planar sports facilities (patent RU No. 2034809, С04В 26/26, ЕСС 13/00) containing fibrous and elastic fillers and a binder.

The disadvantage of this composition during operation of the coating is insufficient vertical drainability, insufficient impact strength at local dynamic loads.

Also known, accepted by the applicant for the prototype, soil for equestrian facilities (GB No. 2306494, ЕСС 13/06). made on the basis of quartz sand (filler), including fibrous materials, elastic fillers and a binder component.

The disadvantages of this soil are low durability when operating in open areas, due to the use in the composition of components that are unstable to ultraviolet radiation, insufficient water permeability, insufficient shock absorption.

3. Disclosure of invention

3.1. A task.

An object of the invention is to optimize the composition of the soil to eliminate these drawbacks, as well as to increase residual deformation, increase recoverability, maintain the uniformity of the soil coating in various weather conditions, ensure the operational properties of the coating in a wide temperature range (from -20 to + 65 ° C), no dust during operation, ensuring the rebound of fragments of soil, for example, from the horse's hooves to a minimum height in order to ensure the necessary level of safety.

3.2. Features

All-weather primer for equestrian facilities "RASHITTREK". unlike the well-known, polyester polymer is used as fibrous materials - lavsan with a fiber length of 1-8 mm, on which a layer of polymeric material is applied - polyvinyl chloride and cord lavsan fiber 5-30 mm long; rigid synthetic polypropylene yarns with lengths are used as elastic fillers 15-40 mm, crushed geotextile web in the form of fragments from 0.5 to 3.0 cm ² and granular elastic filler in the form of rubber crumb fraction 1.0-15 mm A surface structural modifier was used as a binder to reduce bulk density, reduce maximum density during soil compaction, increase absolute deformation, increase absolute residual deformation, ensure water permeability at the required level, with the following ratio of ingredients:

quartz sand 70-95% polyester fiber - lavsan with a polymer layer - polyvinyl- chloride 0.5-4% cord dacron 1-5% hard synthetic polypropylene yarns 0.05-0.2% ground geotextile web 0.05-0.2% surface structural modifier 2-10% rubber crumb rest

Quartz sand is used fine-grained with a grain diameter of 0.5-1.5 mm with a high silicon content.

In this case, the surface structural modifier is made in the form of a balanced mixture with a melting point of 65-90 ° C, including hydrocarbons of the paraffin series - low and high molecular weight paraffins and the addition of an organosilicon polymer, in the following ratio of components:

low molecular weight paraffins - 30-45%,

high molecular weight paraffins - 45-60%,

organosilicon polymer - 2-10%.

3.3. Brief Description of the Drawings

Figure 1 presents an example of the use of all-weather soil "Rashittrack" for the coating device,

where item 1 is a gravel layer with fractions of 32-100 mm, 20 cm thick, item 2 is a gravel layer with fractions of 10-32 mm, 15 cm thick, item 3 is a gravel layer with fractions of 5-10 mm, 15 cm thick, pos .4 - leveling layer, pos. 5 - membrane, pos. 6 - all-weather primer for sports facilities.

4. The implementation of the invention

The stated technical problem is solved due to the fact that the accepted characteristics of the components: elastic fibrous fillers - polyester fiber (lavsan) 1-8 mm long with a polymer layer - polyvinyl chloride and cord fiber 5-30 mm long, rigid synthetic polypropylene filaments 15-40 mm long , a nonwoven chopped geotextile fabric in the form of fragments of 0.5 to 3.0 cm ^2, the granulated filler in the form of an elastic rubber crumb fractions 1.0-15 mm, applied binder - surface structural modifier when taken with the elations provide components (see Table 1). Complex improving soil characteristics: bulk density decrease, reducing the maximum density under compaction, increased absolute deformation, increase of the absolute residual deformation, ensuring water permeability at the required level.

The surface structural modifier is a balanced mixture of paraffin hydrocarbons, for example, low and high molecular weight paraffins, waxes, ceresins, with the addition of organosilicon polymers.

The composition of the modifier: low molecular weight paraffins - 30-45%, high molecular weight paraffins - 45-60%, organosilicon polymer - 2-10%. The melting temperature of the modifier, depending on the component composition, is in the range from 65 to 90 ° C. The most important characteristic of a surface structural modifier that determines the operational properties of soil is the dependence of its penetration on the initial temperature: the weaker this dependence and the wider the temperature range at which a weak dependence is observed, the wider the temperature range the soil is maintained.

Layout example of a structural modifier:

Industrial oil I-20A (GOST 20799-88) 35 wt.% T-2 paraffin (GOST 23683-89) 10 wt.% Ceresin 80 (GOST 2488-79) 50 wt.% Organosilicon polymer 5 wt.%

Rashitrek soil can be manufactured in various ways, both previously, using mixing units of periodic and continuous action, and directly at the site of the prepared site.

As an example, we give a high-performance method for producing soil using a DS 50B soil mixing plant, which is used in road construction and is intended for the preparation of cement-soil and bitum-soil mixtures from incoherent soils.

For the production of soil, the following main components and assemblies are used.

1. The continuous mixing unit with a capacity (with a fill factor of K = 1.4) is 2600 kg.

2. Heated containers with pumping units for receiving, storing, heating the surface structural modifier to the melting temperature (75-100 ° C) and its continuous dosage into the mixing unit.

3. Bunkers (2 units) for storage and dosage of bulk and fibrous materials, equipped with metering devices (slide gates) and conveyor belt.

4. Inclined conveyor with a capacity of 280 t / h for the continuous supply of bulk and fibrous components to the mixer.

Preparation of the site for applying the soil is as follows.

A three-layer gravel coating with layer-by-layer compaction using construction equipment is laid on the surface of a natural soil base leveled using construction equipment. Subsequently, the lower layer of gravel (crushed stone) with a thickness of 20 cm with fractions of 32-100 mm is laid, which rolls to a predetermined design density, then the middle layer of gravel (crushed stone) with a thickness of 15 cm with fractions of 10-32 mm is laid, then the upper layer of gravel is laid (crushed stone) with a thickness of 15 cm with fractions of 5-10 mm in size, each of the layers is leveled and compacted.

A leveling layer of 5 cm thickness is laid on top of the gravel coating, which is a layer of finely dispersed gravel (crushed stone) of a fraction of 5-7 mm or a layer of porous permeable asphalt using an asphalt-laying technique.

A membrane made of nonwoven web material with the Polizon trademark with a weight of 200-350 g / m ^{2 is} laid on top of the leveling layer in one layer at a time.

The resulting mixture of all-weather soil is laid on top of the membrane, leveled and compacted to 15 cm by means of a roller to an average density of 1200-1300 kg / m ³ . Ground filling and compaction is carried out at a positive ambient temperature.

After compaction, the top soil layer with a depth of 5-7 mm is loosened by harrowing to bulk density.

The optimal composition of all-weather soil for equestrian facilities "RASHITTREK" includes:

quartz sand of the grade ВС-040-1 according to GOST 22551-77, previously 87.3% dried up to humidity no more 0.5% rubber crumb fractions 1.0-15 mm four% polyester fiber - lavsan, with polymer layer - polyvinyl 2.0% readme, fiber length 1-8 mm cord length 5-30 mm 2.5% rigid polypropylene threads 15-40 mm long 0.1% ground geotextile fabric in the form of fragments from 0.5 to 0.1% 3.0 cm ² surface structural modifier 4.0%

The coating obtained from the proposed soil has the following characteristics: bulk density of 700-740 kg / m ³ , the average density in the compacted state of 1280-1300 kg / m ³ .

The table shows the comparative soil test results for equestrian facilities.

The table shows that the change in the component composition of the soil in the direction of reducing the content of elastic fibrous materials and crumb rubber due to an increase in the content of sand leads to a deterioration in the mechanical characteristics of the soil. Soil No. 3 has the best characteristics.

We especially note that the all-weather soil for equestrian facilities "RASHITTREK" of composition No. 3 has successfully passed operational tests as a racetrack coating for the International Equestrian Sports Complex of Kazan (agreement No. 068/05 for scientific and technical work between the branch of OJSC " Tatspirtprom "" Directorate of the international equestrian sports complex "and JSC" Visteks "on the topic: development of production and operation of all-weather soil" RASHITTREK "for the International equestrian sports complex in Kazan).

In the course of constant monitoring of its properties, it was found that the soil has high shock absorbing parameters, the necessary shock absorption, maintains operational properties in a wide temperature range (from -20 to + 65 ° C), maintains uniformity in various weather conditions, has a high vertical drainage ability, supports optimal humidity required for lack of dust during operation. In addition, there is a rebound of soil fragments from the horse's hooves to a minimum height, which increases the level of safety during equestrian competitions.

Table Name of soil Soil composition Bulk density, g / cm ³ The maximum density during compaction, g / cm ³ Absolute deformation, mm Absolute residual deformation, mm Recovery,% Water permeability,% Component % Import soil Taken as a prototype 0.87 1.45 1.4 1,2 13.3 1 min-12.7
30 min - 9.5
60 min - 9.0
3 hours - 7.0 Soil number 1 quartz sand 90.3 0.91 1.49 1.4 1.3 7.1 1 min-10.2
30 min - 7.2
60 min - 6.4
3 hours - 4.9 rubber crumb 3.0 polyester fiber (lavsan) 1,0 cord fiber 1,5 synthetic threads 0.1 geotextile web 0.1 PSM 4.0 Soil number 2 quartz sand 89.3 0.82 1.38 1.9 1.7 10.5 1 min - 10.5
30 min - 7.8
60 min - 6.0
3 hours - 5.1 rubber crumb 3.0 polyester fiber (lavsan) 1,5 cord fiber 2.0 synthetic threads 0.1 geotextile web 0.1 PSM 4.0 Soil number 3 quartz sand 87.3 0.72 1.29 2.2 1.8 18.2 1 min - 13.9
30 min - 10.3
60 min - 9.2
3 hours - 7.9 rubber crumb four polyester fiber (lavsan) 2 cord fiber 2,5 synthetic threads 0.1 geotextile web 0.1 PSM four

Claims (3)

1. An all-weather primer for equestrian sports facilities containing quartz sand, fibrous materials, elastic fillers and a binder component, characterized in that the polyester polymer is used as fibrous materials - lavsan with a fiber length of 1-8 mm, on which a layer of polymer material is applied - polyvinyl chloride, and cord dacron fiber 5-30 mm long, rigid synthetic polypropylene filaments 15-40 mm long, crushed geotextile fabric in the form of fragments of 0.5 or more are used as elastic fillers about 3.0 cm ² and the elastic granular filler in the form of crumb rubber fraction 1.0-15 mm as a structural binder applied surface modifier, providing a decrease of bulk density, reduced maximum density under compaction, increased absolute deformation, increase of the absolute residual strain ensuring water permeability at the required level with the following ratio of ingredients: quartz sand 70-95% polyester fiber - lavsan with polymer layer - polyvinyl chloride 0.5-4% cord dacron 1-5% hard synthetic polypropylene yarns 0.05-0.2% ground geotextile web 0.05-0.2% surface structural modifier 2-10% rubber crumb rest 2. The soil according to claim 1, characterized in that applied fine-grained quartz sand with a grain diameter of 0.5-1.5 mm with a high silicon content. 3. The soil according to claim 1, characterized in that the surface structural modifier is made in the form of a balanced mixture with a melting point of 65-90 ° C, including hydrocarbons of the paraffin series - low and high molecular weight paraffins and an additive - silicone polymer, in the following ratio of components: low molecular weight paraffins 30-45% high molecular paraffins 45-60% organosilicon polymer 2-10%