Elastic permeable pavement comprising waste-polyurethane chips for use on new roads and a paving method using the same
OwnerSung Kanginventor
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Abstract
The present invention provides an elastic permeable pavement comprising waste-polyurethane chips for use on new roads and a paving method using the same. This pavement uses a binder specially developed to secure the binding between an upper polyurethane chip layer and a lower permeable concrete layer as well as the binding among the waste-polyurethane chips, resulting in excellent strength and durability, and uses recycled polyurethane chips to provide elasticity and permeability suitable for sports activities, walking, outdoor exercises and the like.
Claims18
Elastic permeable pavement for use on new roads comprising a land layer;
- a filter layer comprising small aggregates;
- a base layer comprising rubbles for concrete of the rubble size 25 mm or less;
- a permeable concrete layer comprising aggregates of the size in the range of 5-13 mm, cement, water and admixture products;
- a primer layer;
- and an elastic layer from the bottom to the surface,
- wherein the permeable concrete layer has the compressive strength of 100 kg/cm2 or more and the permeability coefficient of 1×10−3 cm/sec or more;
- the primer layer comprises 10-20% by weight of PPG, 5-10% by weight of TMP, 5-10% by weight of 1,3-BG, 15-25% by weight of TDI, 49-64.9% by weight of a solvent (xylene or methylethylketone) and 0.1-1.0% by weight of an additive (defoaming agent);
- and
- the elastic layer is prepared by mixing waste-polyurethane chips and a binder in the weight ratio of 3:1 to 4:1, the waste-polyurethane chips having the size of 1 to 5 mm, and the binder comprising 50-70% by weight of PPG, 5-10% by weight of PBG, 3-5% by weight of 1,3-BG, 20-30% by weight of MDI and 2-5% by weight of TDI.
A method of paving elastic permeable pavement on new roads comprising the steps of:
- piling up a land layer, a filter layer comprising small aggregates, a base layer comprising rubbles for concrete of the rubble size 25 mm or less, a permeable concrete layer comprising aggregates of the size in the range of 5-13 mm, cement, water and admixture products, and an elastic layer from the bottom to the surface,
- wherein a primer layer comprising 10-20% by weight of PPG, 5-10% by weight of TMP, 5-10% by weight of 1,3-BG, 15-25% by weight of TDI, 49-64.9% by weight of a solvent (xylene or methylethylketone) and 0.1-1.0% by weight of an additive (defoaming agent) is spread on the permeable concrete layer before pouring the elastic layer,
- and wherein the elastic layer is prepared by mixing waste-polyurethane chips and a binder in the weight ratio of 3:1 to 4:1 in situ, the waste-polyurethane chips having the size of 1 to 5 mm, and the binder comprising 50-70% by weight of PPG, 5-10% by weight of PBG, 3-5% by weight of 1,3-BG, 20-30% by weight of MDI and 2-5% by weight of TDI;
- after spreading the elastic layer, pressing the elastic layer with a roller of 20-30 kg heated to temperatures of 50-80° C. and trowelling the layer in the same temperature;
- and then
- curing for about 5 to 24 hours.
Dependencies are inferred from the claim text.