Waterproof and Root-Resistant Waterproofing Materials for Overseas Roofing Plants No.1 (China Construction Waterproofing Materials Industry Association, Beijing 100831) Table 1 Performance and Characteristics of Planted Roofing Waterproof Layers Waterproof Layers Types Thickness/mm Durable Life Resistance Load Watertight Root Resistance Characteristic Bitumen Stacked waterproof 51020-60x durable long years, excellent durability, water tightness, resistance to load. The need to use other root barriers is the most used method. PVC sheet waterproof 1.5-2.51020A00 is wear resistant and can be exposed and used on foot. Rubber Sheet Waterproof 1.2-1.510-15xAx Lightweight, soft, can be spread on the aerated concrete, can be exposed, non-walking polyurethane coating waterproof 310-13A0x liquid, complex construction, continuous deterioration in wet performance. F0P waterproof 310-15A00 construction time is short, beautiful decoration, hard material, poor resistance. Note: 0, A, and x indicate performance from high to low.
0 Foreword In recent years, planting roofs have risen quietly in economically developed countries such as Western Europe, the United States, and Japan. They are in the ascendant and have a considerable size. The market share is still growing rapidly. In Germany, for example, in 2003, 30% to 40% of newly built flat roofs were planted roofs, of which 802 were light green roofs (also called extensive planting roofs) and 20% were heavy green roofs (also called fine-grained roofing).
Planting roofs generally include planting layers, drainage and filtration layers, separation layers, waterproof barrier layers, insulation layers, vapor barrier layers, grass layers, etc. The most important of these is the waterproof layer, which should be both waterproof and prevent the penetration of plant roots. Features. Based on some of the relevant information collected at exhibitions and publications, the author briefly introduced the waterproof materials used for growing roofs abroad for the concerned parties.
According to the second Waterproof Seminar Proceedings held by the Japan Society of Architects, the roof can be waterproofed with asphalt membranes, waterproofed with PVC membranes, waterproofed with rubber membranes, waterproof with polyurethane coatings, and water-repellent with FRP (fiber-reinforced polyester coatings). The performance and characteristics of various waterproof materials are shown in Table 1. The structure of the planting roof is complex and difficult to inspect and repair, thus requiring good durability. Japan requires heavy roof life of 50 years and light roofs of 20 years.
In planting roofing, waterproofing membranes are required to have the property of preventing the penetration of plant roots. Sometimes it also uses special root-blocking materials to create double insurance.
1 Asphalt waterproofing layer 1.1 Asphalt waterproofing layer in Japan The Architectural Society of Japan stipulates that the courtyard garden greenery should have a durability of 50 years and require 4 layers of waterproofing membranes. The structural layers are: (1) Bituminous bottom layer treatment agent (2) ) Modified bitumen waterproofing membrane (1.0kg/m2) or self-adhesive modified bitumen waterproofing membrane (3) Modified bitumen membrane with hot melt asphalt (1.0kg/m2) (4) Modified bitumen membrane with hot melt asphalt paste (1.0kg/m2) (5) Extensible waterproof membrane with non-woven tire with hot melt asphalt paste (1.0kg/m2); (6) Bitumen Apply 1.0kg/m2; (7) Asphalt smear 1.0kg/m2; (8) Rupture layer; (9) Spacer; (10) Concrete protection layer.
1.2 German bituminous waterproofing layer German anti-penetrating waterproofing membranes are modified bitumen-based membranes and PVC, EPDM, PE and other polymer membranes. The modified bitumen-based waterproof layer contains two layers of modified bitumen waterproof membranes, and the surface layer must be a plant root-resisting material, or an additional layer of a root-blocking material.
The waterproofing layer of the roof garden of Vedag (Germany) company consists of two or VedagardSKplus.VedaflorWS-X is a kind of top-layer plant root-resisting waterproof material, because the chemical root-resisting material is mixed with the modified asphalt, so that the plant root cannot penetrate the waterproof layer, This ensures the life of the waterproof material. Vedaflor WS-I is a kind of top-layer plant root-resisting waterproof material. After its carcass is treated with copper vapor, it can achieve the purpose of preventing the root, but it will not damage the surrounding environment. When the plant root comes into contact with the copper-containing carcass, it will look for other ways to continue growing. This special method of treating copper vapor is a patent of Vedag. VedaflorWS-U is a kind of bottom layer self-adhesive plant root-resisting waterproof material. The principle of waterproof root-resistance is the same as Vedaflor WS-X.VedagardSK is a self-adhesive vapor-separated product. Its aluminum carcass can prevent moisture and prevent water vapor transmission; The layer can be fixed on the surface of Vedagard SK with Vedatex asphalt glue. Vedagard SKplus is a double-sided self-adhesive vapour barrier product. Its aluminum carcass can prevent moisture and prevent water vapour from penetrating. Its upper surface is a self-adhesive asphalt mixture material, and the insulation layer can be directly fixed on it with Vedatex asphalt rubber. The surface, or with a blowtorch to remove the top of the PE film, the insulation material spread on the surface. The properties of the above materials are shown in Table 2. 1.3. Soprema's root-resisting and waterproof material Soprema's Sopranature roof garden system consists of the following: root barrier, waterproof layer, drainage layer, water-retaining irrigation system, Growth medium, vegetation, edge protection, etc.
The root barrier layer is an important part of the roof garden, the purpose is to prevent the plant roots from destroying the waterproof layer, the physical barrier layer (Microfab) and chemical resistance layer (SopraleneJardin).
Microfab's physical barrier layer is a coated microporous polyethylene fabric that can be used as a root barrier in flower pots, green roofs, and roof gardens to prevent chemicals from leaching into roof drains. The pores allow water and air flow. , but it can stop the penetration of the root. The properties of Microfab are shown in Table 3. The waterproof layer is used to ensure that the roof does not leak. It is generally composed of two layers: the top layer is SopraleneJardinSBS modified bitumen waterproof membrane (chemical resistance root system) or SopraleneFlam180GRSBS modified bitumen waterproof membrane; the bottom layer is ElastopheneFlamSBS. Modified bitumen membrane or self-adhesive SBS modified bitumen membrane.
2 PVC waterproof layer 2.1 PVC waterproofing material of Sarnafil Company The PVC waterproofing membrane of Sarnafil Company is resistant to aging, the service life on the roof is at least 20 years; it has good low-temperature flexibility, -30K no cracks; resistance to root penetration, especially suitable for green roofing; Good perforation resistance and pressure resistance, high mechanical resistance; low dimensional change rate; uniform material, no delamination, no capillary phenomenon; long-term solderability, easy maintenance, etc.
It can be used to expose roofs, green roofs, traffic platforms (traffic roofs and overhead roofs), light steel roofs, and old roofing repairs.
The company's F676 membranes are color-coded, non-UV resistant. Table 2 Performance of Vedag Roof Garden Waterproofing Materials Item Thickness/mm Size/m Coating SBS Root Resistance Bitumen Resistance Bitumen SBS Bituminous Bituminous Undersurface Self-adhesive Bitumen and Tear film can be used blowtorch to remove self-adhesive asphalt and tearable membrane carcass composite tire polyester tire polyester copper vapor tire aluminum foil/composite tire on the surface membrane can be used blown torch to remove fine sand anti-reflection film, lap side self-adhesive self-adhesive asphalt And tearable film low temperature flexibility/K high temperature/K tensile strength/Q fracture elongation/S 2006.3 China Construction Waterproof Table 3 Physical properties of Microfab Root Resistance Item Standard Performance Roll Size*/m Thickness/mm Tensile Strength/ N Elongation Elongation / 5m Mullen Cracking Strength / kPa Tear Diffusion / N Permeability / (cm/s) * Other Size Double-layered Fusion Homogeneous Coil, Resistance to Root Penetration, Extension to Fracture, if required The rate is high, suitable for protective roofing system and can be used to grow roofs.
The company has green roof model projects in China, such as the roof of the new Shanghai IKEA store.
The garden roof system composition of AlkaDrakaNV generally includes: concrete structure, protective layer, vapor control layer Alkorplus81012, insulation layer, separation layer, Alkorplan waterproof membrane, protective layer, drainage and filtration layer, grassroots and vegetation, details and connections.
Alkorplan waterproofing membrane is used as a waterproof membrane for loose-laying roof system. Its performance is shown in Table 4. Table 4 Average performance of Alkorplan35177 waterproofing membrane ((5177) required tensile strength elongation/5 transverse!
Shrinkage rate 5 (80 6) No crack longitudinal tear strength / UN / mm) Transverse lamination strength パ N / 50mm) Water diffusibility /!
Calculated value of 20.000 Root resistance without perforation Resistance to static perforation During construction, the AlkErFlaI with a minimum thickness of 5 mm is stretched over the insulation layer and possibly the separation layer without tension (57 waterproofing membranes. Waterproofing membranes should overlap 52 + +J is printed on one side of the web. 9. The hot air welding zone shall extend from the edge of the web at least (0mm. All welds shall be tested impervious to water. Liquid Alkroplan 810 (8 sealing pastes must be sealed) At the edge of the weld seam, apply a water test or other approved method to check the impermeability of the seal film.
EPDM waterproof layer EPDM waterproofing membrane is very durable. It is ideal for waterproofing and moisture proofing of buildings. Its flexibility and strength do not change from -406 to 1206. EPDM coils are UV resistant and do not contain plasticizers that may evaporate during use and have no effect on their function for decades under the influence of water, UV radiation, sunlight, ice, and contaminants. EPDM waterproofing membranes are considered to be the most effective waterproofing materials for buildings and greening decoration due to their unique anti-root penetration and resistance to decay, bacteria, algae, and microorganisms. The following is a brief introduction to the EPDM roof garden system of the Swedish company Trelleborg Building Roof Systems.
At the beginning of the 1960s, the construction and use of EPDM waterproofing membranes by Swiss Frilly Construction Systems Co., Ltd. has installed over 100 million+'s in the world, and it has taken the lead in Europe. The company's Elastoseal EPDM system is the most commonly used, consisting of large EPDM coils, loosely laid on the ground and covered with coarse gravel, sedum vegetation, roof gardens or concrete decks.
The rapid laying of the climate conditions, four-person work group can be installed on each working day 2000m2, cost-effective. Its light weight, absorbent structure warping, with particularly good dimensional stability, resistance to microbes and root penetration, is suitable for growing roofs.
Conclusion Waterproof membranes commonly used in planting roofs mainly include modified asphalt, PVC and EPDM. Due to factors such as heavy planting roof load, long service life, and difficulty in maintenance, foreign countries use more layers of modified bitumen waterproofing layer, but bituminous-based waterproofing materials have poor root-resistance and need to adopt steep slope roofing synthetic materials if you have visited recently. Some model homes or participate in the Architectural Products Exhibition including the 2005 International Roof Show. You will find that many building material manufacturers have begun to produce synthetic traditional building materials such as bricks, tiles, stone and roofing materials. replica". Some manufacturers seize the opportunity to focus on mimicking traditional high-end steep-slope roofing materials such as natural stone slabs, shingles, and synthetic products of clay and concrete tiles.
The meaning of “synthetic steep slope roofing material†here refers to those roofing tiles of asphalt shingles, concrete and clay tiles, replicas of metal plates, slate, and shingles, as well as reclaimed plastic or rubber as main components.
Synthetic roofing materials have gradually occupied a certain share in the roofing market due to various factors. These factors include various efforts by organizations engaged in regeneration and energy conservation to reduce waste landfills and reduce the energy costs of manufacturing. The growing maturity of thermoset and thermoplastic polymer technologies has provided rich renewable raw materials for the manufacture of synthetic roofing materials. According to the author's informal survey of seven manufacturers of synthetic roofing materials, recycled plastics and rubber materials account for 60% to 90% of the total amount of synthetic products. The processes for manufacturing synthetic roofing products are varied, including injection molding, extrusion molding, and Molding and so on. Synthetic roofing materials in the United States and Canada are very resistant to root agents, aluminum foil, copper vapor and other means to solve this problem. As long as the PVC and EPDM waterproofing membranes have a large thickness, they can also be used for single-layer roofing of planting roofs, or they can be laid on top of a bituminous membrane as a waterproof layer for the lower layer to form a multi-layer waterproofing. Therefore, it is possible to vigorously develop barrier-laminated modified bitumen waterproofing layers to meet the needs of fine-grained heavy-duty roofing, and to properly develop and use PVC and EPDM waterproofing membranes to gradually form a diversified waterproof material system.
Obviously, the anti-root waterproofing layer plays a vital role in planting roofing. The development of durable root-resisting waterproof material is imperative. It is necessary to invest scientific research efforts to develop some rapidly-improved root-modified asphalt waterproofing membranes at a reasonable price. According to the needs of research and adoption of suitable for many places have production.
1 advantages compared with traditional materials, the use of steep slope synthesis of roofing materials have some significant advantages, for example, synthetic and natural slate tile actual weight difference is quite large, synthetic slate tile weight is only about 1/3 of the natural slate tile. The weight reduction allows synthetic slate tiles to be used on ordinary substrates without having to worry about increasing the structural load.
Another advantage is the transportation of the product. Most synthetic products are produced one by one, and some products form several larger pieces of a board-like unit when they are produced. This plate-like product can improve the laying efficiency. Some manufacturers claim that labor can be saved because the product does not require special tools for cutting.
Some manufacturers of synthetic cedar tile also claim to save labor because workers no longer need to apply fireproof or anti-mildew paint, and many of these products have ULA~C fire rating.
In addition, most of the information on synthetic products advertises products with anti-hail performance. Some manufacturers claim that their product's anti-hail performance can reach level 4. Some manufacturers even told homeowners that if they use their products, the premium rate of the home can be reduced, and some say that such products can prevent mold and prevent insects from attacking.
Planting roofing PVC and EPDM waterproofing membranes will provide a solid material foundation for the healthy development of planting roofs in China. The overseas barrier-type polyethylene film is also worth our reference. China should also develop this kind of special resistance-resistant material, so that the waterproof function of the planting roof is more durable and reliable.
Member of the Expert Committee of the Material Industry Association. Contact address: 100831 Beijing Sanlihe 11 2006.3 China building waterproof M54
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