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Road base mixture and preparation method thereof

A technology for road base and mixing materials, applied in the field of traffic civil engineering, can solve problems such as affecting plant growth, and achieve the effects of reducing pollution, improving utilization, and reducing consumption

Pending Publication Date: 2020-08-25
NINGXIA UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with fly ash, slag has less harmful substances after high-temperature calcination and sterilization, and has relatively little impact on the environment, but a large amount of piled slag occupies a large area of ​​land and affects the growth of nearby plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The road base mixture of this embodiment includes the following components by weight: 1 part of cement, 2 parts of fly ash, 5 parts of slag, 45 parts of crushed stone, 0.5 part of silica fume, 2 parts of activator, of which:

[0030] The crushed stone is composed of the following parts by weight: 11 parts of crushed stone with a particle size between 19-31.5mm, 26 parts of crushed stone with a particle size of 9.5-19mm, and crushed stone with a particle size of 4.75-9.5mm 16 copies.

[0031] SiO in the slag and fly ash 2 And Al 2 O 3 Total mass fraction> 75%, loss on ignition ≤ 10%, SiO in silica fume 2 The content of slag is greater than 90%; the particle size of the slag is ≤4.75mm.

[0032] The stimulant consists of Na 2 SO 4 And NaOH composition, the mass ratio Na 2 SO 4 : NaOH=1:1.

[0033] The preparation method of the road base layer mixture of this embodiment includes the following steps:

[0034] (1) Perform XRD and XRF detection on slag and fly ash, determine the conte...

Embodiment 2

[0040] The road base mixture of this embodiment includes the following components by weight: 1 part of cement, 3 parts of fly ash, 8 parts of slag, 40 parts of crushed stone, 0.7 parts of silica fume, and 1.8 parts of activator, of which:

[0041] The crushed stone is composed of the following parts by weight: 15 parts of crushed stone with a particle size of 19-31.5mm, 25 parts of crushed stone with a particle size of 9.5-19mm, and crushed stone with a particle size of 4.75-9.5mm 18 copies.

[0042] SiO in the slag and fly ash 2 And Al 2 O 3 Total mass fraction> 75%, loss on ignition ≤ 10%, SiO in silica fume 2 The content of slag is greater than 90%; the particle size of the slag is ≤4.75mm.

[0043] The stimulant consists of Na 2 SO 4 And NaOH composition, the mass ratio Na 2 SO 4 : NaOH=1:1.

[0044] The preparation method of the road base layer mixture of this embodiment includes the following steps:

[0045] (1) Perform XRD and XRF detection on slag and fly ash, determine the con...

Embodiment 3

[0051] The road base mixture of this embodiment includes the following components by weight: 1.5 parts of cement, 6 parts of fly ash, 10 parts of slag, 38 parts of crushed stone, 0.8 parts of silica fume, 1.5 parts of activator, of which:

[0052] The crushed stone is composed of the following parts by weight: 20 parts of crushed stone with a particle size of 19-31.5mm, 23 parts of crushed stone with a particle size of 9.5-19mm, and crushed stone with a particle size of 4.75-9.5mm 20 copies.

[0053] SiO in the slag and fly ash 2 And Al 2 O 3 Total mass fraction> 75%, loss on ignition ≤ 10%, SiO in silica fume 2 The content of slag is greater than 90%; the particle size of the slag is ≤4.75mm.

[0054] The stimulant consists of Na 2 SO 4 And NaOH composition, the mass ratio Na 2 SO 4 : NaOH=1:1.

[0055] The preparation method of the road base layer mixture of this embodiment includes the following steps:

[0056] (1) Perform XRD and XRF detection on slag and fly ash, determine the con...

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Abstract

The invention discloses a road base mixture. The road base mixture comprises the following components in parts by weight: 1-2 parts of cement; 2-10 parts of coal ash; 5-15 parts of furnace slag; 30-45parts of gravels; 0.5-1 part of silica fume; and 1-2 parts of excitant. In the road base mixture, the main components of the furnace slag are SiO2 and Al2O3; the main component of the silica fume isSiO2; the furnace slag and the silica fume can react with Ca (OH) 2 generated by hydration reaction of the cement, so that C-A-H and C-S-H gelling substances with stable chemical properties can be generated, so that the mixture has higher strength. On the premise of ensuring that various performance indexes meet the requirements, the utilization rate of the fly ash and the furnace slag is increased as much as possible, cement consumption is reduced, economic benefits are maximized, and various performance indexes are optimized. According to the road base mixture of the invention, the fly ash and the furnace slag are applied to road infrastructure construction, so that the pollution to the surrounding environment caused by accumulation of a large amount of industrial wastes is reduced, theconsumption of natural gravels can be reduced, and the purposes of changing wastes into valuables and realizing sustainable development are achieved.

Description

Technical field [0001] The invention relates to the technical field of traffic and civil engineering, in particular to a road base mixture and a preparation method thereof. Background technique [0002] Road pavement structural layer materials and roadbed foundation treatment are a crucial part of road construction. The quality of roadbed is related to the safety and service life of the road in the later period, so it is necessary to ensure the quality of the foundation. The road base material is usually a mixture of limestone and gravel. Sand, earth and stone are the raw materials that must be consumed in the construction of any building and public building. In the past two decades, with the vigorous development of various buildings in my country, there is a strong demand for earth and stone materials. More than 95% of the sand and gravel in the country come from rivers and mountains, but with continuous excavation, the gravel resources have gradually dried up. Finding alternati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08C04B18/10C04B111/20
CPCC04B28/00C04B2111/0075C04B2111/29C04B2201/50Y02W30/91
Inventor 李宏波严鹏飞段军库殷建光
Owner NINGXIA UNIVERSITY
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