46results about How to "Guarantee long-term stability" patented technology

The invention provides a reinforced and toughened road rapid repair material and a preparation method thereof. The reinforced and toughened road rapid repair material is prepared from the following raw materials: nonamethylene diamine, urea, polyvinyl alcohol, dipentaerythritol, para-aramid fibers and a defoaming agent. The method comprises the following steps: step 1, optimizing processing characteristics of polyvinyl alcohol; step 2, preparing modified para-aramid fibers; step 3, preparing nonamethylene diamine containing the modified para-aramid fibers; and step 4, preparing composite modified polyurea. The repair material disclosed by the invention can greatly shorten the construction operation time and quickly repair local damage of a pavement; meanwhile, the material has high strength and flexibility, long-term stability of combination of the material and an original pavement can be guaranteed, and secondary damage in the using process is prevented.

The invention discloses a design method and a structure for preventing settlement-deformation damage of a soft-rock subgrade of a road. The design method comprises the steps of (A) testing the uniaxial saturated ultimate compressive strength; (B) judging and sorting by selecting soft rocks; (C) filling the bottom part of an embankment with a layer of sand gravels; (D) filling the subgrade part with the soft-rock fillers in a layering manner, and finally paving a layer of composite geomembrane with two fabrics and one membrane; (E) after filling the soft rocks every time, filling a layer of sand gravels; and (F) reducing the distance of sandwich fillers for the soft rocks easy to humidify and disintegrate and paving a geogrid to carry out reinforcement on embankment slopes. The structure is characterized in that the bottom part of the embankment is filled with one layer of sand gravels, one layer of composite geomembrane with the two fabrics and one membrane is paved on the sand gravel, the subgrade part is filled with the soft rocks in sequence in a layering manner, finally one layer of composite geomembrane with two fabrics and one membrane is paved, the geogrid is adopted at the embankment slopes, and qualified fillers of a roadbed are paved on the top-layer composite geomembrane with two fabrics and one membrane. The design method disclosed by the invention has the advantages that the implementation is easy, the stability is improved, the effect of preventing the settlement-deformation damage of the soft-rock subgrade of the road is obvious and the cost is low.

The invention provides a high-strength durable rapid repair material for roads and a preparation method of the material. The material is prepared from the following raw materials: polyaspartic ester,diisocyanate, ultrahigh-molecular-weight polyethylene, low-molecular-weight polyethylene, heterocyclic aramid fibers, a crosslinking agent, a silane coupling agent and a defoaming agent. The preparation method comprises the following steps: step 1, optimizing processing characteristics of ultrahigh-molecular-weight polyethylene; step 2, preparing active polyethylene composite powder; step 3, preparing polyaspartic ester-polyethylene composite powder; step 4, preparing modified heterocyclic aramid fibers; and step 5, preparing composite modified polyurea. The repairing material provided by theinvention can greatly shorten the construction operation time and quickly repair local damages of a road surface; and meanwhile, the material has higher strength and flexibility, can ensure long-termstability of combination of the material with an original road surface, and can prevent secondary damage in a using process.