4results about How to "Reduce construction temperature" patented technology

The invention discloses polyurethane modified asphalt for a drainage asphalt pavement as well as a preparation method and application thereof, and belongs to the technical field of asphalt modification, the polyurethane modified asphalt for the drainage asphalt pavement comprises the following raw materials: matrix asphalt, a thermosetting polyurethane prepolymer, a catalyst and a compatilizer; based on 100 wt% of the addition amount of the matrix asphalt, the addition amount of the thermosetting polyurethane prepolymer is 33.3-66.7 wt%, the addition amount of the catalyst is 0.5-1 wt%, and the addition amount of the compatilizer is 0.5-1 wt%; the problems that in an existing drainage asphalt pavement technology, due to insufficient adhesion, aggregate falls off, water damage is caused by rainwater in the interior, the service life cannot be met due to insufficient structural strength, and due to the fact that in an existing polyurethane modified asphalt technology, polyurethane curing is fast, construction operability is insufficient are solved.

The invention discloses a multi-element modifier for improving the construction workability of a rubber asphalt mixture. The multi-element modifier comprises the following components in parts by weight: 49-66 parts of a rubber body material, 2-13 parts of a thermoplastic elastomer, 20-40 parts of a plasticizer, 5-13 parts of a viscosity modifier and 1-3 parts of a coupling agent. The preparation method comprises the following steps: (1) putting the rubber body material, the thermoplastic elastomer and the plasticizer into a high-pressure reaction kettle in proportion for reaction to obtain a premix A, (2) proportioning the premix A, the viscosity modifier and the coupling agent in proportion and putting into a closed mixer to obtain a rubber compound B, and (3) shearing, granulating and screening the rubber compound B to obtain the multi-element modifier. The multi-element modifier disclosed by the invention not only can reduce the high-temperature viscosity of a rubber asphalt mixture and reduce the construction temperature, but also can enable an asphalt mixing process to be carried out in a simple and continuous manner, so that the energy consumption is effectively reduced, and the construction quality is stabilized.

The utility model discloses a hidden type aerial fog dust falling construction system after sand shale interbed tunnel excavation blasting. Comprising a rack supporting system, a high-pressure spraying dust-settling system and a high-pressure wind path system, the rack supporting system is an excavation trolley, the nozzles are divided into a spraying dust-settling nozzle and a high-pressure air path nozzle, the pipe body is divided into a spraying dust-settling pipe body and a high-pressure air path pipe body, the high-pressure spraying dust-settling system comprises a spraying high-pressure pump and a high-pressure water pipe connector, and one end of the high-pressure water pipe connector is communicated with an inlet of the spraying high-pressure pump; the outlet end of the spraying high-pressure pump is connected with a spraying dust-settling nozzle through a spraying dust-settling pipe body, and the high-pressure air pipe connector is communicated with a high-pressure air path nozzle through a high-pressure air path pipe body. After a tunnel excavation working face adopts the excavation rack hidden type aerial fog dust falling system, water mist flow can surround the section of a lining, settle dust and prevent the dust from flying into the air, meanwhile, rocks are wetted, the generation amount of the dust during falling of the rocks is reduced, the dust throwing length is shortened to 60 m, the smoke exhaust time after blasting is shortened, the construction efficiency is improved, and the construction cost is reduced. And the construction temperature in the hole is reduced.

The present application relates to a kind of recycled asphalt warm mix agent and its warm mix recycled asphalt mixture and preparation method, recycled asphalt warm mix agent, including two components of warm mix agent and reagent;The raw material of warm mix agent includes solvent, viscosity reducer and surfactant with mass ratio of 100:(13-20):(3.5-5), wherein the solvent is the mixture of elaidic acid and tung oil acid;Reagent is the powder obtained by calcining treatment of calcium carbonate.Warm mix recycled asphalt mixture includes mixture A, 0.65-1% of warm mix agent in the mass of mixture A, 1-2% of reagent in the mass of mixture A, and 1.5%-4.0% of asphalt in the mass of mixture A;Mixture A includes aggregate, RAP and mineral powder with mass ratio of 100:(40-150):(1-10).The present application can reduce construction temperature by more than 50 DEG C.