CN-121974609-A - Road base material based on multiple solid wastes and proportion confirmation method and application thereof

CN121974609ACN 121974609 ACN121974609 ACN 121974609ACN-121974609-A

Abstract

The invention belongs to the technical field of road construction, and particularly relates to a road base material based on multiple solid wastes and a proportion confirmation method and application thereof. The method comprises the following steps of S1, preparing raw materials, S2, determining a steel slag blending proportion, S3, calculating the consumption of steel slag according to a volume filling principle, calculating the void ratio of steel slag with different particle sizes after being molded according to the porous characteristics of the steel slag, S4, packing rubber particles and copper tailings by cement mortar, filling the rubber particles and copper tailings in the surface voids of the steel slag, calculating the volume ratio of the volume of the cement mortar to the volume of the steel slag by combining the influence of the expansibility of the steel slag on the volume parameters, S5, calculating the consumption of the copper tailings and the consumption of the cement mortar, S6, absorbing the expansion deformation of the steel slag by the rubber particles, and calculating the consumption of the rubber particles according to the relation between the expansion ratio of the steel slag and the elongation of the rubber particles. The invention adopts a volume design method, considers the influence of the expansion rate of steel slag, calculates the consumption of the road base material, ensures the stability of the base material, and has better strength.

Inventors

ZHANG YUBIN
LUO BAOLIAN
REN YUAN
BAO SHIHUI
NIU JINGTAO
FANG XIAOLI
WANG CHUNHONG
WANG XIANGBIAO

Assignees

安徽省交通规划设计研究总院股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260403

Claims (10)

1. The road base material proportioning confirmation method based on multiple solid wastes is characterized by comprising the following specific steps: s1, preparing raw materials including copper tailings, steel slag, rubber particles and cement, and determining the grading composition of each grade of steel slag; S2, grading design is carried out on road base materials, and the blending proportion of steel slag of each grade is determined; S3, blending the steel slag with different grain sizes according to the grading design result, calculating the theoretical density and the consumption of the steel slag according to the blending proportion, forming by adopting a vibration compaction method, and calculating the void ratio of the steel slag with different grain sizes after forming; S4, a part of cement adhesive cement is wrapped on the surface of the steel slag, and the other part of cement adhesive cement enters into pores on the surface of the steel slag, and according to the water absorption of the steel slag with different particle diameters and the influence of the expansibility of the steel slag on volume parameters, the volume ratio of the volume of the cement adhesive cement into the pores on the surface of the steel slag with different particle diameters to the volume of the steel slag is calculated; S5, the cement mortar is further wrapped on the surfaces of the rubber particles and the copper tailings, the total steel slag expansion rate is calculated according to the expansion rates of steel slag with different particle sizes, after the steel slag with different particle sizes is molded and expanded, the gaps are filled by the rubber particles wrapped with the cement mortar and the copper tailings, the remaining gaps are the designed void rate of the road base material, and the consumption of the copper tailings and the consumption of the cement mortar are calculated; S6, the rubber particles absorb the expansion deformation of the steel slag, are extruded into gaps of the road base material, and calculate the consumption of the rubber particles according to the expansion rate of the steel slag with different particle sizes and the elongation of the rubber particles.
2. The method for confirming the mixture ratio of road base materials based on multiple solid wastes according to claim 1, wherein in the step S3, the amount of steel slag and the void ratio of the steel slag with different particle diameters after molding are calculated according to the following formula: %; ; wherein, VCA-void ratio of steel slag with different grain diameters after synthesis grading molding,%; ρ cg -synthetic grading forming density of steel slag with different grain diameters, g/cm 3 ; ρ g -maximum theoretical density of synthetic grading of steel slag with different grain diameters, g/cm 3 ; And the volume of steel slag in the P g —1m 3 road base material, m 3 .
3. The method for confirming the road base material proportion based on the multiple solid wastes according to claim 1, wherein in the step S4, the volume ratio of the volume of cement paste entering the surface pores of steel slag with different particle diameters to the volume of steel slag is calculated according to the following formula: ; Wherein VK i is the volume ratio of cement slurry volume to steel slag volume entering the steel slag surface pores with the i-th grade grain diameter,%; w i -water absorption of steel slag in the ith gear,%; ρ i g -the density of steel slag at the ith gear, g/cm 3 ; ρ s -density of water, g/cm 3 .
4. The method for confirming the road base material proportion based on the multiple solid wastes according to claim 1, wherein in the step S5, the use amount of the copper tailings and the use amount of the cement paste are calculated according to the following formula: ; ; + ; ; ; ; ; Wherein, the volume expansion rate of steel slag in VP-road base material,%; alpha i -the volume expansion rate of steel slag with the i-th grade grain diameter,%; P i -ith grade of grain size steel slag accounts for the proportion of the total amount of the steel slag,%; VCA-void ratio after synthesis grading molding of steel slag with different grain diameters, the%; VV-design void fraction of road base material,%; The volume of steel slag in the P g —1m 3 road base material, m 3 ; the volume of copper tailings in the P w —1m 3 road base material, m 3 ; The volume of rubber particles in the P j —1m 3 road base material, m 3 ; The volume of cement paste in the P jj —1m 3 road base material, m 3 ; The volume of cement used for wrapping steel slag in the P jj1 —1m 3 road base material, m 3 ; The volume of cement paste used for wrapping rubber particles and copper tailings in the P jj2 —1m 3 road base material, m 3 ; vK i -volume ratio of cement paste volume to steel slag volume entering steel slag surface pores with the i-th grade grain diameter,%; SA-steel slag synthetic gradation specific surface area, m 2 /kg; a, the steel slag synthesis grading is at the passing rate of 4.75mm sieve holes; b, the steel slag synthesis grading is at the passing rate of a sieve pore of 2.36 mm; c, the steel slag synthesis grading is at the passing rate of a sieve pore of 1.18 mm; d, the steel slag synthesis grading is at the passing rate of a sieve pore of 0.6 mm; e, the synthetic gradation of the steel slag is at the passing rate of a sieve pore of 0.3 mm; f, the synthetic gradation of the steel slag is at the passing rate of a sieve pore of 0.15 mm; g-steel slag synthesized grading is at the passing rate of a sieve pore of 0.075 mm; mu j -thickness of cement paste film, mm; ρ jj —density of cement paste, g/cm 3 ; r-average particle size of copper tailings, mm; r i -mesh size, mm; r i+1 -the size of the screen hole of the last gear of the ith gear, mm; Q i -copper tailings in sieve mesh Screen residue,%; r j -particle size of rubber particles, mm.
5. The method for confirming the mixture ratio of road base materials based on multiple solid wastes according to claim 1, wherein in the step S6, the amount of rubber particles is calculated according to the following formula: ; Wherein the volume of steel slag in the P g —1m 3 road base material is m 3 ; VP-steel slag volume expansion rate in road base material,%; The volume of rubber particles in the P j —1m 3 road base material, m 3 ; elongation of the beta-rubber particles,%.
6. The road base material proportion confirmation method based on the multiple solid wastes, which is characterized in that the designed void ratio of the road base material is 2% -5%, and the volume expansion ratio of the steel slag with the i-th grade particle size is less than or equal to 3.5%.
7. The method for confirming road base material proportion based on multiple solid wastes according to claim 4, wherein the cement consumption is calculated according to the water-cement ratio, the water-cement ratio of cement is 0.4-0.6, and the thickness of cement film is 0.01-0.015 mm.
8. The road base material proportion confirmation method based on the multiple solid wastes, which is characterized in that the steel slag comprises 3-5 mm steel slag with the grain size, 5-10 mm steel slag with the grain size, 10-20 mm steel slag with the grain size and 20-27 mm steel slag with the grain size, in the step S1, each grade of steel slag and copper tailings is screened to determine the steel slag proportion composition, the rubber particles are 30-80 meshes, the elongation of the rubber particles is 30% -60%, the grain size of the copper tailings is less than or equal to 0.6mm, and the passing rate of the copper tailings through sieve holes with the grain size of 0.075mm is less than or equal to 30%.
9. A multi-solid waste-based road base material prepared by the multi-solid waste-based road base material proportioning confirming method as set forth in any one of claims 1 to 8.
10. Use of a multiple solid waste based road base material according to claim 9, comprising the steps of: (1) Determining the proportion of each grade of material according to a proportion confirmation method, and preparing a road base material based on multiple solid wastes by a mixing station; (2) Transporting road base materials based on multiple solid wastes to the site for paving; (3) Vibrating and rolling for 4-6 times by adopting a vibratory roller, and then carrying out static pressure for 2-3 times by using a rubber-wheel roller, wherein the tonnage of the vibratory roller is more than 22t; (4) Immediately after rolling, quality detection should be carried out, and health maintenance is started.

Description

Road base material based on multiple solid wastes and proportion confirmation method and application thereof Technical Field The invention belongs to the technical field of road construction, and particularly relates to a road base material based on multiple solid wastes and a proportion confirmation method and application thereof. Background The steel slag, copper tailings and rubber particles are solid waste materials generated in industrial production, the historic storage quantity of the solid waste materials is huge, the solid waste materials not only occupy land, but also are buried in ecological environment hidden trouble. Meanwhile, the consumption of natural aggregate such as sand stone is remarkable in road infrastructure construction, part of areas are faced with the dilemma of high-quality road construction material shortage, and mountain and stone production can damage the ecological environment. Under the background, the 'treating roads with waste and changing waste into valuable' becomes a win-win option for breaking the trouble of absorbing solid waste and the defect of road building materials. The method applies the industrial solid wastes such as steel slag, copper tailings, rubber particles and the like to highway construction in a synergistic way, can relieve the solid waste disposal pressure, and can replace increasingly scarce natural sand and stone resources. The semi-rigid base material has the advantages of high early strength, good plate body property, strong diffusion stress and the like, so that the existing high-grade highway pavement base adopts the semi-rigid base material, and the material accounts for more than 70% of the total amount of the pavement material and needs to consume a large amount of stone. The steel slag has similar mechanical property and particle characteristic to those of natural stone, may be used as stone substitute, and the copper tailings has homogeneous particle and stable performance and may be used as stuffing. However, the steel slag can expand when meeting water, and the problems of road surface deformation, cracking and the like are easily caused when the steel slag is used for a road surface base layer, can be avoided by absorbing the expansion deformation of the steel slag by the doped rubber particles, but the mixing proportion of the base layer material doped with the rubber particles at present completely depends on an indoor test, and the optimal mixing proportion can be determined by a plurality of tests, so that the material performance is difficult to reach an optimal state. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a road base material based on multiple solid wastes, and a proportion confirmation method and application thereof. The invention adopts a volume design method, controls the expansion rate of steel slag through volume parameters, calculates the consumption of the road base material, ensures the stability of the road base material, and has better strength. In order to achieve one of the above purposes, the present invention adopts the following technical scheme: a road base material proportion confirmation method based on multiple solid wastes comprises the following specific steps: s1, preparing raw materials including copper tailings, steel slag, rubber particles and cement, and determining the grading composition of each grade of steel slag; S2, grading design is carried out on the road base materials of the multiple solid wastes according to the grading range requirements of each sieve pore size of more than 2.36mm specified in the specification, and the blending proportion of each grade of steel slag is determined; S3, blending steel slag with different particle sizes according to grading design results of the road base materials of the multiple solid wastes, calculating theoretical density and consumption of the steel slag according to blending proportion, and then forming by adopting a vibration compaction method to calculate void ratios of the steel slag with different particle sizes after forming; S4, a part of cement adhesive cement is wrapped on the surface of the steel slag, and the other part of cement adhesive cement enters into pores on the surface of the steel slag, and according to the water absorption of the steel slag with different particle diameters and the influence of the expansibility of the steel slag on volume parameters, the volume ratio of the volume of the cement adhesive cement into the pores on the surface of the steel slag with different particle diameters to the volume of the steel slag is calculated; S5, the cement mortar is also wrapped on the surfaces of the rubber particles and the copper tailings, the steel slag expands after long-term use, the total steel slag expansion rate is calculated according to the expansion rates of the steel slag with different particle diameters, the gaps are filled by the rubber particles wrapped with the ce