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Geopolymer cementing material for pavement base based on multielement solid waste synergy and preparation method of geopolymer cementing material

A technology of cementitious materials and pavement base, which is applied in the field of transportation materials, can solve the problems of reducing the cost of raw materials for pavement bases, cracking of pavement bases, etc., and achieve the effects of reducing crack damage, reducing cement consumption, and improving return single modulus

Pending Publication Date: 2021-08-27
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it provides a cementitious material for pavement bases for highway engineering, which solves the cracking problem of pavement bases caused by the use of conventional P·O42.5R and P·C 32.5R cements, and at the same time significantly reduces the cost of raw materials for pavement bases

Method used

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  • Geopolymer cementing material for pavement base based on multielement solid waste synergy and preparation method of geopolymer cementing material
  • Geopolymer cementing material for pavement base based on multielement solid waste synergy and preparation method of geopolymer cementing material

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Embodiment 1

[0022] The chemical composition of the fly ash, slag, calcium carbide slag and desulfurized gypsum used in this embodiment is shown in Table 1 below, and the molar ratio of Ca / Si is 3.2, the molar ratio of Si / Al is 1.8, and the molar ratio of Al / S is 1.5. The ratio of each raw material is 25 parts of fly ash (dry basis), 40 parts of slag (dry basis), 26 parts of carbide slag (dry basis), and 9 parts of desulfurized gypsum (dry basis).

[0023] Table 1 Chemical composition of various solid waste raw materials

[0024] chemical composition SiO 2

Fe 2 o 3

Al 2 o 3

CaO MgO Na 2 o

K 2 o

SO 2

Slag (dry basis) 37.74 2.25 6.50 47.25 3.77 0.31 0.39 1.24 Fly ash (dry basis) 42.67 2.57 42.36 4.30 3.20 0.58 0.39 0.57 Carbide slag (dry basis) 7.90 0.96 0.50 63.93 1.27 0.13 0.24 0.03 Desulfurization gypsum (dry basis) 2.97 0.52 1.44 41.50 1.43 0.17 0.39 51.25

[0025] The dry basis f...

Embodiment 2

[0031] The chemical composition of the fly ash, slag, calcium carbide slag and desulfurized gypsum used in this embodiment is shown in Table 3 below, and the molar ratio of Ca / Si is 3.1, the molar ratio of Si / Al is 2.0, and the molar ratio of Al / S is 1.9. The ratio of each raw material is 26 parts of fly ash (dry basis), 40 parts of slag (dry basis), 26 parts of carbide slag (dry basis), and 8 parts of desulfurized gypsum (dry basis).

[0032] Table 3 Chemical composition of various solid waste raw materials

[0033] chemical composition SiO 2

Fe 2 o 3

al 2 o 3

CaO MgO Na 2 o

K 2 o

SO 3

Slag (dry basis) 34.57 0.51 10.50 42.75 4.13 0.77 0.46 1.38 Fly ash (dry basis) 52.93 3.25 36.64 3.72 0.40 2.95 0.38 0.58 Carbide slag (dry basis) 8.50 1.27 0.50 65.25 0.96 0.13 0.24 0.03 Desulfurization gypsum (dry basis) 3.65 0.52 1.44 43.50 1.43 0.17 0.39 49.68

[0034] The dry basis ...

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Abstract

The invention discloses a geopolymer cementing material for pavement base based on multielement solid waste synergy and a preparation method of the geopolymer cementing material. The geopolymer cementing material is mainly characterized in that fly ash, slag, carbide slag and desulfurized gypsum are used as main materials, the characteristics of various solid wastes are fully played, and the geopolymer cementing material is prepared on the basis of the principle of the geopolymer cementing material by utilizing the synergistic enhancement effect of the solid wastes. Through three main procedures of drying, grinding and secondary uniform mixing, the geopolymer cementing material special for the pavement base is prepared, wherein various performance indexes of the geopolymer cementing material meet the requirements of JT / T 994-2015 Cement for Highway Engineering Pavement Base Stability. Compared with the traditional cement-stabilized pavement base material, the dry shrinkage of the cement-stabilized pavement base material is greatly improved, and the crack hazard of the pavement caused by the dry shrinkage of the base is obviously reduced. Meanwhile, a large number of road building materials can be saved, waste is fully utilized, energy is saved, environmental pollution is reduced, resources are saved, the environment is protected, the road quality is improved, and the green traffic development concept is met.

Description

technical field [0001] The invention belongs to the field of transportation materials, and in particular relates to a geopolymer gelling material for pavement base course based on multi-component solid waste synergy and a preparation method thereof. Background technique [0002] With the rapid development of my country's highway traffic and the rapid construction of national and provincial trunk road networks, there is a huge demand for cementitious materials for pavement bases of newly built roads, and cement-based stable bases are characterized by their high strength, good water stability, and high degree of standardization of raw materials. The advantage is that it is the most widely used pavement base in road construction in my country. However, the dry shrinkage coefficient of the cement-based stable base is relatively large, and the paved pavement base is prone to cracks, which are reflected to the road surface and cause pavement cracks. Then, with the intrusion of rain...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/144C04B2201/20C04B2201/50C04B2111/0075C04B18/08C04B18/141C04B18/0427C04B22/062C04B22/147C04B14/02
Inventor 杨志杰闫长旺张德康栋张菊
Owner INNER MONGOLIA UNIV OF TECH
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