The Content Of The Article:
- Advantages of concrete grass pavers
- The applications of grass pavers made of concrete
- Durable and navigable green areas with grass pavers - what matters?
- Lay concrete grass pavers
- Lay lawn grass stones on a stable substructure
In today's designs and more than ever before, concrete lawn pavers are one of the most clever ways to create floor space in the transitional area between home and garden: ecologically exemplary, easy to lay and easy to maintain, and the entire area around the house remains wonderfully green. The concrete grass pavers can be easily laid as a DIY project, except a manual you need only a lot of muscle:
Advantages of concrete grass paversConcrete was negatively occupied for a while, due to the 1970s boom in concrete construction, when our land was covered in hideous concrete surfaces, endless gray instead of green. Also on the ground, of course with soil seal. Until geologists warned that our groundwater would soon run short if sealing continued to operate to that extent. Therefore (and because nature around us is getting less and less anyway) surfaces are nowadays no longer "concreted" as possible, but z. B. get green by lawn pavers or even by breaking up concrete surfaces, which are then covered with lawn pavers, again "made green".
Grass pavers made of concrete are often used, a material with a much better life cycle assessment than is often assumed:
- A pure concrete without additives also consists of purely natural substances
- Namely cement, which is called only in terms of construction, from the Latin "caementum", quarry stone or building block
- Geologically speaking cement consists of limestone, clay, marl (a sedimentary rock)
- If necessary, quartz sand and iron oxide-containing substances may be added as correction materials for better sintering (production process by heating)
- All ground to raw meal and burned, cooled and ground with cement, fly ash, limestone and gypsum to cement
- This cement is then mixed with sand or gravel and water, and that's it, that's concrete
- Thus, concrete consists only of raw materials that occur in nature and are available quite indefinitely
- All raw materials for concrete can be obtained in environmentally friendly processes
- For the production of concrete only very little energy has to be used
- Concrete production causes about 80% less CO2 emissions than plastic production
- Concrete is durable and offers much resistance to weather conditions (= looks good for a long time)
- Concrete is produced everywhere, long transport routes do not arise
- From old concrete again new concrete is recycled
- So there are very good reasons why concrete is still one of our most important building materials
The applications of grass pavers made of concreteGrass pavers made of concrete are laid on surfaces that are to remain green and infiltratable, but nevertheless should be regularly used or driven in the same route without creating ugly "beaten tracks" or lanes. There are some areas around the house and garden, in which a laying of concrete lawn grid without substructure is conceivable: garden paths, seating islands u.ä. If concrete grass pavers are to be laid in areas that are to be frequented by a motor vehicle and even occasionally by a truck, the green area will only remain a nice level of greenery for longer if the substructure has been expertly designed:
Durable and navigable green areas with grass pavers - what matters?The laying guidelines for grass pavers in public traffic areas require a variety of minimum requirements, which you can use to orient yourself well in the private sector, so that the grass pavers remain a visually appealing area for a long time:
1. Filter stability to avoid erosion
A water-permeable traffic area can only be securely fastened if the layers of the substructure are sufficiently filter-stable with one another. Can be critical when laying grass paver on water-permeable road surfaces, because it comes to erosion, if the coating z. B. is more permeable than the mineral mixture in which the grass pavers are placed. Then geotextiles have to be in between. In the private sector, it is important that gravel and gravel and sand in the matching grain sizes are selected so that no rearrangement of fine minerals takes place.
2. Requirements for the substrate
Regulated for public use by ZTVE-StB 94 (Additional Technical Terms and Conditions for Road Works, see d-nb.info/981204384/04). In the private sector, sufficient water permeability, a layer thickness of the permeable ground of at least one meter and a floor space of the highest free groundwater level can be assumed to be at least 2 meters.
3. Requirements for the substructure
For the public sector again in accordance with ZTVE-StB 94, in the private sector, the necessary permeability coefficient is generally achieved by normal garden soil uncritically. This permeability coefficient describing the infiltration capability (Kf value, to be determined in accordance with DIN 18130-1) can cause problems in heavy soils, which consist almost exclusively of clay or loam. If you have to deal with such soils on your property, you are usually already informed about it (because they had to lay drains during house construction - if not, your first contact person would be your local environmental office). Then your substructure for the grass paver stones might need to be made stronger, so that the water always runs smoothly. How strong you might find out about a friend (who can put you in touch with the polisher of a road construction company), or an expert on road construction (who can not take a fortune if he spends half an hour with you Layer structure busy).
4. Requirements for the base course
In the public sector, base courses and antifreeze layers must be designed in such a way that each mixture of building materials has been adjusted to the requirements of water permeability and load-bearing capacity. Coarse-grained mineral mixtures with maximum particle size of 32 mm, 45 mm or 56 mm are required for base courses without binder % 20% 26% 20Kies% 2015% 2011% 2006.pdf) and a certain load-bearing capacity (deformation modulus Ev2 = 120 MN / m², on top of the base layer). All this according to ZTVT-StB 95/2002 (Additional Technical Terms of Contract and Guidelines for Base Layers in Road Construction, see ulb.tu-darmstadt.de/tocs/111384192.pdf) and TL SoB-StB 04 (Technical Terms of Delivery for Building Material Mixes and Floors For the production of layers without binders in road construction, see lbm.rlp.de/icc/Internet/nav/459/broker.jsp?uMen=45940232-4d31-1c31-01ce-18c40a7fd727&_ic_print=true), comprehensive essays on the construction of base courses, the procurement of which in critical cases u. U. also worth it in the private sector. In non-critical normal case you just use gravel, gravel, sand of the above grain from a rather coarse grain-line area, and can be assured when buying from the dealer that the lawn pavers with provided substructure will carry your vehicle and the ev. Oil-delivering truck ( They do not lay on public areas, on which even the heaviest fireworks, etc. should not collapse).
5. Edge edging
In the public area, an all-round edging for the area to be covered with grass pavers is always provided. In the private sector, there are also reasons to provide an all-round edging, this should and can prevent during use shifts of the stones in the edge region and intercept the horizontal forces acting in the surface.
is intended for public use and must also be installed in the private sector so that rainwater can run off. Normal are 2 to 2.5%, for individual cases may apply otherwise.
7. Requirements for bedding
Grass pavers are laid in the public area on a bedding of at least 4 cm of natural stone chippings of grain size 2/5 mm, whereby the filter stability of the bedding against the base course and a sufficient water permeability must be guaranteed. Also applies in the private sector, with little-loaded grass pavers can be embedded in sand.
8. joints and seepage openings
For both areas: Grass pavers are to be laid with joint widths between 3 and 5 mm, which is recommended because of the permissible dimensional tolerances of the stones, the stretching and compression of the concrete and to avoid edge chipping. Seepage openings (the middle of the grass pavers) and joints should be filled with natural stone chippings of 2/5 mm grain size before shaking. If the lawn pavers are to be landscaped, a mixture of 40% topsoil, 20% chippings 2/5 mm, 20% lava 0/5 mm and 20% compost soil is to be filled in the public area, to which a mineral storage fertilizer was added. For sowing, a short-growing, dry-resistant seed mixture (RSM) is prescribed. You should stick to it in the private sector, a tested Rule seed mixture simply brings more than a pack with a nice name.
9. Shake it off
"Public" grass pavers should (regardless of the stone thickness) generally be compacted with vibrating plates with a maximum operating weight of 130 kg and a centrifugal force of approximately 20 kN. The use of a plate slide device (hard rubber apron) is prescribed to avoid damage to the surface and edges. Only for smaller areas with grass pavers, it is assumed that hammer-fair laying can provide sufficient positional stability (this tapping with the rubber hammer goes right into the arms)."Shaking or not shaking" is a recurring discussion when laying lawn grass stones. There is talk of concrete crumbs after the shaking, cracked stones, chipped edges... what can happen if you shake grass pavers on a poorly compacted base course with a (for your own strength and ability) to heavy but not dampened by rubber apron vibrating plate. Here you should avoid any discussion and better comply with the rules for the professionals. On the contrary, the better and tighter you are already compacting each of the subgrade layers, the lower the risk of damaging the grass pavers when shaken, and the more durable and (durable) the flat surface becomes. If you do not shake off or walk around carefully on busy surfaces, you'll later "shake it off" by car, and that quickly gives away lanes that never go away, broken stones, maybe even more... If you're shunting or do not hit the same track on the next drive, creates a creative hill landscape, which does not look so great.
Lay concrete grass paversAs far as the official regulations, which provide the "optimal theory", now an overview of the implementation in practice:
1. Lay (almost) without a substructure
If your concrete paver lattices can be laid without substructure because of low load, this is quite easy: The stones are embedded so deeply that they form a flat surface with the surrounding soil. Then fill with soil, pave, wait 2 weeks, top up if necessary and then sow lawn or plant with walk-in ground cover. If you want to give a small bed to lawn grass stones in a loose ground, wear a layer of about 5 cm, fill this layer with sand and lay the stones in it as described above. For the filling you can mix in mother earth, for the planting here the above-mentioned lawn mixtures are suitable and firm ground covers, which deal with lean earth.
2. Load-bearing substructure
For the load-bearing substructure for used areas, cover about 50 cm of ground. Pave the ground, in former times you have now sometimes designed water-permeable weed fleece, as this runs counter to the sense (greening, infiltration) that is no longer recommended today. Now, the base layer of 35 cm coarse gravel is evenly distributed and compacted well with the above-described vibrating plate (from the construction equipment rental). If the coarse gravel layer is firm, a second approximately 5 cm thick gravel layer is applied to it, it should consist of fine chippings. This is just and clean deducted and in turn well compacted. Target with regard to the layer thickness: After shaking, the high-grade chippings layer should be 1 cm higher than the finished surface should be, because the grass pavers sink when shaking about 1 cm.
Lay lawn grass stones on a stable substructureThen the grass pavers can be laid in a composite on the surface:
- The honeycomb grass pavers just need to be laid on top, they are designed to automatically fit together
- Design lawn pavers are laid out in the distances given by the manufacturer's manual
- If the grass pavers are lying, the filling for the planting can be introduced
- It is slurried and sprinkled with sand after the seepage of standing water
- Then again it is well compacted
- If present, you can place a steel plate or shuttering board on the surface to compress it over the surface with even pressure, and the vibrator should be fitted with a rubber plate
- Do not use a so-called "frog" for shaking, its support surface is too small and likes to break any edge on which he comes up unprotected
- During the filling, the filling settles, usually something has to be refilled
- For most stones, however, the filling should end up somewhat below the top edge of the stone for structural reasons, say 3 to 5 mm
- Now a back support (oblique support made of mortar) can be attached, it may even serve as a bed for the curbs
- Now the lawn can be sown, think about the application of a Rule Seed Mixture for sturdy lawns
- The young grass should be mown the first time it is 6 to 8 cm high
- The more frequently you mow (the tips), the better you will develop strong under-grasses and a densely-rooted turf