CH123290A - Procedure for the creation of resilient road surfaces. - Google Patents
Procedure for the creation of resilient road surfaces.Info
- Publication number
- CH123290A CH123290A CH123290DA CH123290A CH 123290 A CH123290 A CH 123290A CH 123290D A CH123290D A CH 123290DA CH 123290 A CH123290 A CH 123290A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- road surfaces
- mixing
- silicates
- creation
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 10
- 150000004760 silicates Chemical class 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 9
- 235000019353 potassium silicate Nutrition 0.000 description 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
Description
Verfahren zur Erstellung widerstandsfähiger Fahrbahndecken. Es ist bekannt, eine selbst starken Be anspruchungen standhaltende Strassendecke aus billigem Kalkgestein oder kalkhaltigen Steinmischungen dadurch zu erstellen, dass man der Deckschicht flüssiges Wasserglas beimischt.
Bei der Ausführung dieses Verfahrens ist man auf viele Schwierigkeiten gestossen. Abgesehen von dem umständlichen Trans port des flüssigen Wasserglases ergab sich, dass ein gleichmässiges Durchmischen des zerkleinerten, viel feinen Staub enthaltenden Materials mit dem viskosen Wasserglas tech nisch schwer ausführbar ist; ferner dass häu fig durch die vielfach ungeschulten Wege arbeiter falsche Gewichtsmengen beigegeben werden.
Die Verfestigung beruht nun aber auf der chemischen Bindung des Silikates mit dem Kalk unter Entstehung unlöslicher Silikate. Daher muss auf gleichmässige Durch-' mischung der grösste Wert gelegt werden. Das Abbinden der Silikate mit dem Gestein beansprucht längere Zeit. Wird nun flüs siges Wasserglas mit dem Füllmaterial ge- mischt und dann durch Walzen auf der Strasse festgelegt unter häufigen Bespren- gungen mit Wasser, so wird das noch nicht abgebundene Wasserglas durch das Wasser in den Strassenunterbau abgeführt.
Um daher zu günstigen Resultaten zu kommen, musste man in der Praxis wesent lich höhere Gewichtsmengen an Wasser glas verwenden, als Versuche im kleinen, wo eine gründliche Durchmischung erzielt wer den konnte, ergaben.
Es wurde. nun gefunden, dass man diese Schwierigkeiten dadurch beheben kann, dass man Steinmaterial, welches mit Silikat ab bindet, beispielsweise kalkhaltiges Stein material oder eisenoxydhaltiges Gestein usw., an Stelle des flüssigen Wasserglases kalt wasserlösliche Silikate in fester Form bei mischt. Bei Verwendung dieser kaltwasser löslichen Silikate in Pulverform erfolgt die Lösung des Silikates erst nach und nach, und die einzelnen Teilchen kleben sich so an das Gesteinmäterial fest, dass' ein Ab waschen durch Sprengwasser nicht erfolgt. Die Mischung des Gesteinmaterials mit die- sen kaltwasserlöslichen Silikaten erfolgt am besten vor der Wasserzugabe.
Die Wasser zugabe kann aber auch stattfinden vor oder während der Durchmischung des Materials, zweckmässig aber erst nach dem Aufbringen der Trockenmischung auf den Unterbau, während des Glattwalzens der Strasse durch Besprengung.
Versuche haben ergeben, dass auf diese Weise hergestellte Strassenoberdecken abso lut gleichmässig gefestigt sind, und dass ein, bleichmässiges Abbinden zwischen dem wasserlöslichen Silikat und dem Kalk statt findet. Ausführungsbeispiel: 3 m3 kalkhaltiger Steinschotter, Sieb rückstand 4, 1 m3 kalkhaltiges Feingut, 60 kg kaltwasserlösliches Natronsilikat. Das Material wird trocken gemischt, auf die Strasse aufgebracht, gesprengt und ein gewalzt.
Das kaltwasserlösliche N atron- silikat kann auch ganz oder teilweise durch Ii'alisilikat oder durch sonstige Silikate, wel che mit kalkhaltigen Gesteinen eine Bin dung respektive Umsetzung eingehen, aus der Alkali-, Erdalkali- und Schwermetall gruppe ersetzt werden.
Process for creating resistant road surfaces. It is known to create a road surface made of cheap limestone or calcareous stone mixtures that can withstand heavy loads by adding liquid water glass to the top layer.
Many difficulties have been encountered in carrying out this process. Apart from the laborious transport of the liquid water glass, it was found that a uniform mixing of the comminuted, much fine dust-containing material with the viscous water glass is technically difficult to carry out; Furthermore, the often untrained road workers often add incorrect amounts of weight.
The solidification is based on the chemical bonding of the silicate with the lime with the formation of insoluble silicates. Therefore, the greatest value must be attached to even mixing. The setting of the silicates with the rock takes a long time. If liquid water glass is mixed with the filling material and then fixed by rolling on the street with frequent sprinkling with water, the water glass that has not yet set is carried away through the water into the road substructure.
In order to get favorable results, therefore, one had to use significantly higher weight amounts of water glass in practice than tests on a small scale, where thorough mixing could be achieved, showed.
It was. Now found that these difficulties can be remedied by mixing stone material which binds with silicate, for example calcareous stone material or iron oxide-containing stone, etc., instead of liquid water glass, cold water-soluble silicates in solid form. When using these cold-water-soluble silicates in powder form, the silicate is only dissolved gradually, and the individual particles stick to the rock in such a way that they are not washed off by water spray. Mixing the rock material with these cold-water-soluble silicates is best done before the water is added.
The addition of water can, however, also take place before or during the mixing of the material, but expediently only after the dry mixture has been applied to the substructure, during the roller burnishing of the road by sprinkling.
Tests have shown that road surfaces produced in this way are absolutely evenly consolidated and that a pale setting takes place between the water-soluble silicate and the lime. Embodiment: 3 m3 calcareous stone gravel, sieve residue 4, 1 m3 calcareous fine material, 60 kg cold water soluble sodium silicate. The material is mixed dry, applied to the street, blasted and rolled in.
The cold-water-soluble sodium silicate can also be wholly or partly replaced by alkali metal silicate or other silicates from the alkali, alkaline earth and heavy metal group which bind or react with calcareous rocks.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE123290X | 1925-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH123290A true CH123290A (en) | 1927-11-16 |
Family
ID=5657727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH123290D CH123290A (en) | 1925-05-18 | 1926-05-18 | Procedure for the creation of resilient road surfaces. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH123290A (en) |
-
1926
- 1926-05-18 CH CH123290D patent/CH123290A/en unknown
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