The invention relates to a permeable pavement system for weakly-permeable soil regions. The invention is characterized in that the system comprises a permeation promoting layer, a rubble layer and a water permeable layer which are paved from bottom to top. The permeation promoting layer contains several permeation promoting holes which vertically pass through the permeation promoting layer. The permeation promoting holes are filled with pebbles and rubbles. The permeable pavement system is suitable for weakly-permeable soil regions and has good engineering application value. By the system, rain gathered on the pavement can be effectively reduced, flood disasters can be minimized, pollution to soil and underground water can be decreased, water environment conditions can be improved, load for sewage treatment plants due to runoff pollution can be lowered, and supplementary amount of underground water can be increased. The system is also one of technical measures for construction of a sponge city.

Permeable pavement system for weakly-permeable soil regions

The invention discloses a ground decoration structure using an alkali-free sand white-color-seepage-prevention material. The structure sequentially comprises a bottom surface base layer 1, a white-color-seepage-prevention material layer 2, a protection layer 3, a face layer 4 and a jointing filling material 5 from bottom to top, wherein the white-frost-prevention material layer 2 comprises an alkaline substance consumption layer 2-1 and a white-color-seepage-prevention cement mortar layer 2-2; and the white-color-seepage-prevention cement mortar comprises low-alkali cement, processed good-grading alkali-free sand, fly ash and additives. After the alkali-free sand white-color-seepage-prevention material provided by the invention is used, a caulking material and the white-color-seepage-prevention material layer at the middle layer per se cannot separate out alkaline substances; the white-color-seepage-prevention material layer can prevent moisture from bringing out the alkaline substances through seeping into the bottom surface base layer; the alkaline substances produced during the hydration reaction of the bottom surface base layer can also be effectively reduced; the protection layer forms a sealed layer on the inner surface of the face layer, so that the alkaline substances are prevented from flowing out from pores of the face layer; the occurrence of a white-color-seepage phenomenon is avoided; and a good decoration effect is achieved.

Ground decoration structure using alkali-free sand white-color-seepage-prevention material

The invention belongs to the field of garden architecture decoration, and concretely discloses a courtyard anti-saltpetering paving structure and a using method thereof. The courtyard anti-saltpetering paving structure includes a finish block layer, a low-alkali cement layer, a crushed rock layer, a leveling layer and a compacted base layer. The finish block layer and the low-alkali cement layer are connected to each other through an adhesive layer. The upper end of the finish block layer is coated with a hydrophobic coating layer, A gravel layer is arranged between the crushed rock layer andthe leveling layer. Water pipes are laid inside the gravel layer. The ends of the water pipes communicate with a main drainage pipe. A geotextile layer is arranged between the leveling layer and the compacted base layer. A manufacturing material of the adhesive layer in the courtyard anti-saltpetering paving structure is an epoxy resin adhesive. The characteristics of the epoxy resin adhesive aresmall volume shrinkage and strong cementation strength and corrosion resistance. The adhesive layer improves the waterproof performance of the courtyard anti-saltpetering paving structure and furtherimproves the anti-saltpetering performance of the courtyard anti-saltpetering paving structure.

Courtyard anti-saltpetering paving structure and using method thereof

The invention discloses an expressway structure and a paving method, which relate to the technical field of pavement paving processes. The expressway structure comprise a subbase layer, a base layer and a surface layer which are sequentially paved from bottom to top, wherein the surface layer comprises an AC-25 asphalt concrete lower surface layer, an AC-20 modified asphalt concrete middle surfacelayer and an AC-13 modified asphalt concrete upper surface layer from bottom to top, and broken water conveying components are laid between the AC-20 modified asphalt concrete middle surface layer and the AC-13 modified asphalt concrete upper surface layer in parallel. The problems that in the prior art, rainwater is accumulated after a road surface is sunken, diffusion fracture starts from the sunken position to the periphery, and vehicle driving is affected are solved; and the problem that the consumption of the snow-melting agent is large and the road surface is easily corroded due to thelimitation of the geographical environment is solved.

Expressway structure and paving method

The utility model discloses a stone material of preventing accumulation of salt in surface soil layer structure of mating formation, it includes: the stone material layer, the blind hole of two row at least parallels is seted up at its back, cement basic unit, it is pasted at the stone material layer back, the landfill has the reinforcing bar at the perpendicular to stone material back in the cement basic unit, the reinforcing bar tail end extends to in the blind hole, the screed -coat, it sets up cement basic unit bottom spaced apartly in the screed -coat establish a plurality of cylinder holes, it has the chad to fill in the cylinder hole, cylinder hole top is uncovered setting, and a round hole is seted up to the bottom, ground basic unit, it lies in the bottom of screed -coat, it is inside be provided with connect in the pipeline of round hole, wherein, the stone material layer with still be equipped with at least one deck glass fiber cloth layer between the cement basic unit. It is simple, with low costs that layer structural design is mated formation to the stone material, had both shown the intensity that has improved the stone material layer and the requirement of permeating water, has effectively guaranteed the replenishment of groundwater resources again, and adaptability is wide, and spreading value is high.

Stone material of preventing accumulation of salt in surface soil layer structure of mating formation

The utility model discloses an accumulation of salt in surface soil structure is prevented to laterite ground stone material, include laterite ground stone material and prevent accumulation of salt in the surface soil structure, prevent that accumulation of salt in the surface soil structure sets up between laterite ground stone material and the ground, be provided with sealed glue between the adjacent laterite ground stone material, prevent that accumulation of salt in the surface soil structure is including the first waterproof adhesive phase, plain boiled water mud layer and the waterproof adhesive phase of second that set gradually, first waterproof adhesive phase with the stone material laminating of laterite ground sets up, laterite ground stone material surface still is provided with the waterproof coating. The utility model discloses simple structure, convenient to use can effectually play the waterproof effect of blocking water, has avoided the production of accumulation of salt in the surface soil phenomenon.

Accumulation of salt in surface soil structure is prevented to laterite ground stone material

The invention provides a preparation method for an anti-alkali efflorescence agent used for a stone material laid on red land. The preparation method comprises the following steps: adding trifluoroethyl methacrylate, methacrylic acid, vinyltriethoxysilane and poly(dodecyltrimethylsilane) into butyl acetate so as to obtain a reaction solution; then adding a certain amount of a chain transferring agent and an initiator into butyl acetate so as to obtain an activation solution; heating the reaction solution, maintaining the temperature of the reaction solution to be constant at 70 to 80 DEG C and then gradually feeding the activation solution into the reaction solution so as to obtain the anti-alkali efflorescence agent; and diluting the anti-alkali efflorescence agent obtained in the step 3 into a solution with weight percentage of 2 to 5% and uniformly coating the surface of the stone material with the solution. The copolymer, i.e., the anti-alkali efflorescence agent, prepared in the invention has low surface free energy, high resistance to water and pollution and strong bonding force with the stone material, and can effectively protect the stone material for a long time; and the preparation method for the anti-alkali efflorescence agent is simple, has good controllability and is favorable for industrial production.

Bao Jun

Papers

Stone material of preventing accumulation of salt in surface soil layer structure of mating formation

Accumulation of salt in surface soil structure is prevented to laterite ground stone material

Preparation method for anti-alkali efflorescence agent used for stone material laid on red land