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Industrial waste alkali slag cement stabilized crushed stone structure layer and its construction method

A technology of cement stabilizing crushed stone and industrial waste alkali, applied in the field of road surface, can solve the problems of poor soil water stability, easy pollution of soil and groundwater, difficult compaction, etc. The effect of reducing construction costs and saving road paving materials

Active Publication Date: 2015-09-09
CHINA RAILWAY NO 5 ENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic use of industrial waste alkali slag is mainly as a kind of engineering filling soil, but the moisture content of alkali slag is relatively high, and the main components are CaO, CaCO 3 , CaCl 2 , Mg(OH) 2 、Al 2 o 3 etc., directly used to fill the soil foundation, not only faces the shortcomings of difficult compaction and poor water stability of the soil foundation, but also the chloride ions in it are easy to pollute the soil and groundwater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Taking the total mass of aggregate as 100kg as an example, the raw materials and their mass ratios for paving the industrial waste alkali slag cement stabilized crushed stone structure layer are as follows:

[0040] Aggregate 100kg

[0041] Water 5.7kg

[0042] Cement 2.0kg

[0043] Alkali residue 2.0kg

[0044] The above-mentioned aggregate is limestone with a particle size of 0.075-37.5 mm; the water is drinking water for humans and animals; the cement is retarded ordinary road portland cement with a label of 32.5; the soda slag is industrial waste discharged from the soda plant.

[0045] The paving method of the above-mentioned industrial waste alkali slag cement stabilized crushed stone structure layer is:

[0046] (1) Treatment of the underlying layer

[0047] Before the industrial waste alkali slag cement stabilizes the gravel structure layer, the underlying layer should be inspected and cleaned first. If it is used as the sub-base of the road, all floating soi...

Embodiment 2

[0059] Taking the total mass of aggregate as 100kg as an example, the raw materials and their mass ratios for paving the industrial waste alkali slag cement stabilized crushed stone structure layer are as follows:

[0060] Aggregate 100kg

[0061] Water 5.1kg

[0062] Cement 2.0kg

[0063] Alkali residue 4.0kg

[0064] Above-mentioned aggregate, water, cement, alkali slag are identical with embodiment 1; Construction method is identical with embodiment 1.

Embodiment 3

[0066] Taking the total mass of aggregate as 100kg as an example, the raw materials and their mass ratios for paving the industrial waste alkali slag cement stabilized crushed stone structure layer are as follows:

[0067] Aggregate 100kg

[0068] Water 4.9kg

[0069] Cement 2.0kg

[0070] Alkali residue 6.0kg

[0071] Above-mentioned aggregate, water, cement, alkali slag are identical with embodiment 1; Construction method is identical with embodiment 1.

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Abstract

The invention discloses a stable broken stone structure layer prepared from industrial waste alkaline residue and cement, and a construction method thereof. The structure layer is composed of the following raw materials in parts by weight: 100 parts of aggregate, 4 to 10 parts of water, 1 to 10 parts of cement, and 1 to 10 parts of alkaline residue. The construction method comprises the following steps: processing a raw road surface, preparing a side mould, mixing, paving, pressing, curing, and quality inspecting; and finally builds an industrial waste alkaline residue and cement stable broken stone structure layer with a thickness of 180 to 220 mm. It has been proved by a lot of indoor researches and tests that the pavement performance indicators of the structure layer totally meet the standards issued by the ministry of communications, and the structure layer has the characteristics of strong anti-scouring performance and prominent shrinkage fracture resistant performance. Furthermore, the preparation method of the structure layer can effectively utilize industrial alkaline residue, has the advantages of good pavement performance, convenient construction, and low cost, is energy-saving and environment-friendly, is beneficial for the continuous development of economy and society, and can be widely applied to basic layers or basic bottom layers of airport roads, city roads, highways, and each classified highway.

Description

technical field [0001] The invention relates to an industrial waste alkali slag cement-stabilized crushed stone structure layer and a construction method thereof, belonging to the technical field of road surfaces such as urban roads, airport roads and highways. Background technique [0002] Industrial waste alkali slag is the waste discharged during the production process of ammonia-soda alkali production, and its main chemical composition on dry basis is CaCO 3 , CaSO 4 , CaO, Mg(OH) 2 , CaCl 2 , NaCl, acid insoluble matter and a small amount of SiO 2 、Al 2 o 3 and Fe 2 o 3 Wait. According to statistics, for every 1t of alkali produced, about 10m 3 The waste liquid contains about 300-600kg of waste residue (depending on the quality of limestone raw material). That is, to produce 1t of alkali, about 0.5t of waste residue (calculated as solid) will be discharged. Due to the large number of soda factories in our country, the soda ash industry occupies an important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/04
CPCY02W30/91
Inventor 曾作良杨金堤吴要亮郭丽云
Owner CHINA RAILWAY NO 5 ENG GRP
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