Design method for mixture ratio of lime-flyash stabilized crushed-stones based on mucilage theory

A mix ratio design and fly ash technology, applied in the field of transportation civil engineering, can solve the problems of mismatch between the maximum dry density and the optimum water content, and the inability to accurately predict the physical and mechanical properties of fly ash crushed stone, etc., to achieve excellent road performance , high dry density and low water content

Active Publication Date: 2014-07-02
CHANGAN UNIV
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Problems solved by technology

[0012] (2) The heavy-duty compaction method and the static pressure method have lagged behind the actual production. The determined maximum dry density and optimal water content do not match the current widely used frequency-adjustable amplitude-modulated vibratory rollers of more than 20 tons, and the prepared test pieces cannot be accurately predicted. Physical and mechanical properties of limestone

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  • Design method for mixture ratio of lime-flyash stabilized crushed-stones based on mucilage theory
  • Design method for mixture ratio of lime-flyash stabilized crushed-stones based on mucilage theory
  • Design method for mixture ratio of lime-flyash stabilized crushed-stones based on mucilage theory

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Embodiment

[0063] see Figure 2 ~ Figure 6 , a lime fly ash stabilized crushed stone mix design method based on the mortar theory, the method is carried out according to the following steps:

[0064] 1. Selection of raw materials

[0065] 1.1 Testing of the technical properties of the raw materials. The lime used was fired in the ash plant of Huangbaoyi in Tongchuan City, Shaanxi Province. The effective CaO+MgO content was 60.94%. The fly ash was produced in Tongchuan City Huaneng Power Plant. The chemical composition is shown in Table 2. The aggregate is limestone from Sunyuan Stone Factory in Tongchuan City, Shaanxi Province, which is divided into four specifications: 19-37.5mm, 9.5-19mm, 4.75-9.5mm, and stone chips. The screening results are shown in Table 3, and the indicators are shown in Table 4;

[0066] Table 2 Chemical composition of fly ash

[0067]

[0068] Table 3 aggregate screening results

[0069]

[0070] Table 4 aggregate technical indicators

[0071]

[00...

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Abstract

The invention discloses a design method for a mixture ratio of lime-flyash stabilized crushed-stones based on a mucilage theory. The design method comprises the following steps of: determining the optimum ratio of lime to flyash, the optimum ratio of lime-flyash to mortar, the optimum ratio of lime-flyash mortar to coarse aggregate, and the optimum ratio of lime-flyash to crushed-stones. By adopting the lime-flyash stabilized crushed-stones designed by the design method, a compact structure of a strongly interlocked framework can be formed, has the advantages of high maximum dry density, small optimum water content, high strength, good crack resistance, scouring resistance, and the like, has excellent pavement performance, and can be used for solving the problems of low early-stage strength of the lime-flyash stabilized crushed-stones and the like in the field of road engineering.

Description

technical field [0001] The invention relates to a mixing ratio design method of lime fly ash stabilized gravel based on the mortar theory, which is mainly used in the field of traffic civil engineering. Background technique [0002] Lime fly ash (referred to as "flyash") crushed stone mix ratio design content mainly includes raw material selection, ore gradation, lime and fly ash dosage, maximum dry density P dmax and the optimum water content w o . The current fly ash crushed stone mix ratio design method is as follows: [0003] (1) Select raw materials according to the technical requirements of "Technical Specifications for Road Pavement Base Construction (JTJ034-2000)"; [0004] (2) The grading range of fly ash macadam meets the requirements of Table 1; [0005] Table 1 Aggregate gradation range of fly ash crushed stone [0006] Mesh size (mm) 31.5 19 9.5 4.75 2.36 1.18 0.6 0.075 Passing rate(%) 100 81-89 52-70 30-50 18-38 10-27 6-20 0-7...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B18/08
CPCY02W30/91
Inventor 蒋应军李宁方赵伟张宜伟张燕明薛金顺
Owner CHANGAN UNIV
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