Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
  • E01C13/06—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003
  • E01C13/065—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003 at least one in situ layer consisting of or including bitumen, rubber or plastics

Definitions

• sands (1) primarily mean the mineral sediments consisting mainly of quartz (Si0 2 ). However, depending on their origin and origin, they can also contain granules of feldspar, mica, magnetite, titanite, hornblende, garnet, tourmaline and the like [see. Römpps ChemieLexikon, 7th edition (1975), 3056 / 57.7. It is only important: the maximum grain size and the grain size distribution, ie a maximum grain size of 10 mm (1.2) and a maximum of 12 percent by weight of a grain size of 2 to 10 mm (1.3). If such sands do not occur naturally, they can easily be sieved or obtained by mixing suitable sieve fractions.
• the water content of the sands is reduced by e.g. B. Set fire drying to a maximum of 1 percent by weight (1.1).
• the sands can be colored powder, such as. B. red lead, iron oxides, chromium oxide and carbon black, colored mineral powders or glass fibers can be added.
• the amount of F a rbpulver depends, of course, primarily on the desired color of the play and sports facility covering. It is generally up to 1 percent by weight, based on sand.
• Suitable binders (2) which are added to the sands for consolidation in an amount of 3 to 6 percent by weight, based on 1, are primarily liquid polybutadienes.
• copolymers of butadiene (1,3) with other 1,3-dienes such as. B. isoprene, 2,3-dimethylbutadiene and piperylene, or with viiiylaromatic compounds, such as. B. styrene, ⁇ -methylstyrene, vinyltoluene and divinylbenzene can be used.
• the content of comonomers in the copolymers of butadiene (1,3) should not exceed 50 mole percent.
• the maximum viscosity of the binders that can be used is 2,000 mPa s / 20 ° C (2.1); the viscosity is preferably 500 to 1,500 mPas / 20 ° C.
• the microstructure of the homo- and copolymers of butadiene (1,3) is critical in that it is necessary that at least 30% of the double bonds (2.2) have cis-1,4 structures. In the case of homopolymers and copolymers, more than 50% of the double bonds should preferably have cis-1,4 structures.
• additives and auxiliaries such as wetting agents, siccatives, skin contraceptives and possibly odor-improving substances, are added to the binder (s).
• B. anionic emulsifiers such as fatty acid salts and alkylarylsulfonates, or cationic emulsifiers, such as alkylamine polyglycol ethers or distearyl-dimethylammonium salts, but especially nonionic emulsifiers, such as.
• cobalt octoate, cobalt naphthenate or cobalt oleate are suitable, which can also be used in the form of their solutions in aliphatic or aromatic solvents.
• the amount of desiccants to be used depends on the desired crosslinking time; as a rule, their proportion is about 0.01 to 0.2%, preferably 0.08 to 0.18%, based on the amount by weight of binder (2) used, the quantity data for the desiccants only relating to their metal content Respectively.
• ketoximes such as e.g. B. the commercial product ASCININ @ R, which are generally added in an amount of 0.02 to 2 percent by weight, preferably 0.05 to 0.5 percent by weight, based on the binder (2).
• Such substances are e.g. B. peppermint oil and rose oil. They are generally used in an amount of from 0.01 to 1 percent by weight, preferably from 0.05 to 0.5 percent by weight, based on the binder (2).
• the preparation of the homogeneous mixture (3) from sand, binder and possibly color powder is carried out in a suitable mixing unit, such as. B. a compulsory mixer.
• the compulsory mixer is characterized by the fact that 2 shafts with mixing arms work in opposite directions in a mixing drum and the mix cannot therefore wind around the mixer.
• the mixture is intimately mixed when, for. B. the color of the mixture appears uniform.
• the mixing time required for this is generally 1 to 10, preferably 3 to 6, minutes.
• the homogeneous mixture of screed consistency which does not flow by itself, in a layer thickness of 0.5 to 4.0 cm, preferably 1.0 to 2.5 cm, on a water-permeable, bituminous bound and compacted substructure of at least 2 cm, preferably 2 to 5 cm, of screed-like thickness (4), optionally smoothing it (5) and allowing it to harden (6).
• the curing time is 0.5 to 24 hours. An aging period of up to 30 days can follow.
• a base z. B. such, consisting of drainage and an approx. 20 to 40 cm thick, compacted ballast layer as well as a further water-permeable, bituminous bound and compacted ballast layer located above it, of 2 to 5 cm thickness.
• the bituminous gravel layer can e.g. B. in a known manner with a paver using an experience narrow grain distribution of, for example, 2 to 8 mm grain without fine fraction and a bitumen fraction below 15 percent by weight, based on gravel.
• the method according to the invention is preferably industrially applicable in the production of water-permeable and crack-resistant coverings on tennis courts.
• commercially available total herbicides can also be added to the screed-like masses in amounts of up to about 1 percent by weight, based on 2.
• Water content of the sand By differential weighing after drying to constant weight at 105 ° C.
• Cis 1,4-content of the binder IR spectroscopic
• the binder consists of 95.9 percent by weight of a liquid polybutadiene with a double bond distribution of 72% cis-1.4, 27% trans-1.4, 1% vinyl, and a viscosity of 764 mPa s / 20 ° C., 1.4 percent by weight of a nonylphenol polyethylene glycol ether , 2.6 percent by weight of co-octoate solution, containing 6 percent by weight of cobalt and 0.1 percent by weight of a commercially available skin contraceptive (ASCININ®R).
• ASCININ®R commercially available skin contraceptive
• the mixture produced in this way has a very good screed consistency and is entered into a shape of the inside dimensions 4 x 4 x 16 cm. After curing and aging for 17 days, a bending tensile strength of is measured
• An area of 100 m 2 on a compacted substructure shows no crack formation even after 1 year.
• Example 1 99% by weight of sand from Example 1 are mixed with 1% by weight of the binder from Example 1 as in Example 1 and applied. After curing and aging for 17 days, a bending tensile strength of only 0.5 and a compressive strength of only 1.5 N / mm2 are measured. The irrigation shows that the test specimens are permeable to water, but lose their strength.
• Example 1 92% by weight of sand from Example 1 are mixed with 8% by weight of the binder from Example 1 as in Example 1. The mixture flows like a sludge and can no longer be processed.
• the irrigation shows that the test specimens are permeable to water and retain their strength.
• An area of 100 m 2 on the substructure described in Example 1 shows no crack formation after 1 year.
• the irrigation shows that the test specimens are permeable to water and retain their strength.
• An area of 100 m 2 on the substructure described in Example 1 shows no crack formation after 1 year.
• Example 1 95.8 percent by weight of sand from Example 1, 0.2 percent by weight of a commercially available iron oxide pigment (iron oxide red AKF) and 4 percent by weight of binder from Example 1 are mixed and applied as in Example 1.
• the mixture has a very good processability. After curing and aging, a bending tensile strength of 4.5 N / mm 2 and a compressive strength of 9.6 N / mm 2 are measured.
• the irrigation shows that the test specimens are permeable to water and retain their strength.
• An area of 100 m 2 on the substructure described in Example 1 shows no crack formation after 1 year.
• An area of 100 m2 on the substructure described in Example 1 shows no crack formation after 1 year.
• Example 1 96 percent by weight of sand from Example 1 are mixed and applied with 3 percent by weight of the binder from Example 1 and 1 percent by weight of soybean oil from the trade as in Example 1.
• the mixture has a very good processability. After curing and aging, a bending tensile strength of 4.5 N / mm 2 and a compressive strength of 10.6 N / mm 2 are measured.
• the irrigation shows that the test specimens are permeable to water and retain their strength.
• An area of 100 m2 on the substructure described in Example 1 shows no crack formation after 1 year.
• Example 1 96% by weight of sand from Example 1 are mixed with 4% by weight of binder as in Example 1 and applied.
• the binder consists of 95.9 percent by weight of a liquid polybutadiene (double bond distribution: 87% vinyl and 13% trans-1.4, viscosity 4,750 mPas / 20 ° C.) and 4.1 percent by weight of the additives from Example 1.
• the bending tensile strength is only approx. 0.5 N / mm 2 and the compressive strength is only approx. 0.2 N / mm 2 .
• the material has remained soft on the inside.
• Example 1 96% by weight of sand from Example 1 are mixed with 4% by weight of binder as in Example 1 and applied.
• the binder consists of 95.9 percent by weight of a liquid polybutadiene (double bond distribution: 35% cis-1.4, 30% trans-1.4, 35% vinyl, viscosity 268 mPas / 20 ° C.) and 4.1 percent by weight of the additives from example 1.
• the screed-like mixture can be processed very well. After curing and aging, the bending tensile strength is 2.6 N / mm 2 and the compressive strength 6.2 N / mm 2 . The irrigation shows that the test specimens are permeable to water and retain their strength.
• An area of 100 m 2 on the substructure described in Example 1 shows no crack formation after 1 year.

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• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Structures (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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• 1979
  • 1979-06-21 DE DE19792925005 patent/DE2925005A1/de not_active Withdrawn
• 1980
  • 1980-05-20 EP EP19800102773 patent/EP0021028B1/fr not_active Expired

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