Theoretical calculation method for water content of mixed material of cement stabilized macadam road pavement

Abstract

The invention discloses a theoretical calculation method for the water content of a mixed material of a cement stabilized macadam road pavement, and aims to determine an optimal water content of the mixed material of the cement stabilized macadam road pavement, and the optimal water content of the mixed material can be relatively precisely and reasonably determined with comparison with an indoor testing result. The theoretical calculation method comprises the following steps: performing theoretical calculation on the standard water rate of cement in a test part used in an indoor test, the water absorption rate of an aggregate and the water rate of a middle gap of the mixed material, converting calculated results into the water amount of the cement in the test part, the water absorption amount of the aggregate and the water amount of the middle gap of the mixed material so as to determine an actual optimal water amount of the mixed material, and further converting the optimal water amount of the mixed material into the optimal water content of the mixed material. By adopting the theoretical calculation method, the situation that the optimal water content of the mixed material can be only determined by using an indoor testing method can be changed, the proportioning rate of the water content of the mixed material of the cement stabilized macadam road pavement can be relatively and reasonably designed, the construction quality can be improved, rework can be avoided, and the production cost can be lowered.

Description

technical field

[0001] The invention relates to a calculation method for the moisture content of the mixture in road construction, in particular to a theoretical calculation method for the moisture content of the cement-stabilized crushed stone road pavement mixture, which is used for determining the optimum moisture content of the cement-stabilized crushed stone road pavement mixture, and can be used with The comparison of indoor test results makes the determination of the optimum moisture content of cement-stabilized macadam highway pavement mixture more accurate and reasonable. Background technique

[0002] At present, the current domestic "Technical Specifications for Road Pavement Base Construction" (JTJ034-2000) stipulates that the design moisture content of the mixture ratio must be determined by test methods. However, there will be differences during the indoor test operation, resulting in certain deviations in the experimental data. If the test results are applied ...

Examples

Embodiment 1

[0035] In this embodiment, the geotechnical compaction instrument vibration molding method is adopted for the test piece, wherein the raw data of the cement-stabilized crushed stone road pavement mixture related constituent materials are measured. ， See Table 1 below.

[0036] Table 1. Statistical table of measured data of aggregate performance

[0037]

[0038] In the above table: the standard consistency of cement is 27.2%.

[0039] 1. After mixing according to the design ratio of the aggregate, the maximum relative theoretical density of the aggregate is calculated to be 2.706;

[0040] 2. Calculate the maximum relative theoretical density of the mixture when it contains cement:

[0041] 100÷(96÷2.706+4.0÷3.1)=2.719

[0042] In the formula: 96 is the proportion of aggregate in the mixture; 2.706 is the relative theoretical density of aggregate after mixing according to the design ratio of stone; 4.0 is the proportion of cement in the mixture; 3.1 is the relative densi...

Embodiment 2

[0072] In this embodiment, the same material as that in the first embodiment is used, and the moisture content of the mixture is designed by using the geotechnical heavy-duty compaction method.

[0073] In this design example, the measured value of the raw data of the relevant constituent materials of the cement-stabilized macadam road pavement mixture ， As in Table 1 above:

[0074] 1. After mixing according to the design ratio of the aggregate, the maximum relative theoretical density of the aggregate is calculated to be 2.706;

[0075] 2. Calculate the maximum relative theoretical density of the mixture when it contains cement:

[0076] 100÷(96÷2.706+4.0÷3.1)=2.719

[0077] In the formula: 96 is the proportion of aggregate in the mixture; 2.706 is the relative theoretical density of aggregate after mixing according to the design ratio of stone; 4.0 is the proportion of cement in the mixture; 3.1 is the relative density of cement .

[0078] 3. According to Table 1 above,...

technical field

[0001] The invention relates to a calculation method for the moisture content of the mixture in road construction, in particular to a theoretical calculation method for the moisture content of the cement-stabilized crushed stone road pavement mixture, which is used for determining the optimum moisture content of the cement-stabilized crushed stone road pavement mixture, and can be used with The comparison of indoor test results makes the determination of the optimum moisture content of cement-stabilized macadam highway pavement mixture more accurate and reasonable. Background technique

[0002] At present, the current domestic "Technical Specifications for Road Pavement Base Construction" (JTJ034-2000) stipulates that the design moisture content of the mixture ratio must be determined by test methods. However, there will be differences during the indoor test operation, resulting in certain deviations in the experimental data. If the test results are applied ...

Examples

Embodiment 1

[0035] In this embodiment, the geotechnical compaction instrument vibration molding method is adopted for the test piece, wherein the raw data of the cement-stabilized crushed stone road pavement mixture related constituent materials are measured. ， See Table 1 below.

[0036] Table 1. Statistical table of measured data of aggregate performance

[0037]

[0038] In the above table: the standard consistency of cement is 27.2%.

[0039] 1. After mixing according to the design ratio of the aggregate, the maximum relative theoretical density of the aggregate is calculated to be 2.706;

[0040] 2. Calculate the maximum relative theoretical density of the mixture when it contains cement:

[0041] 100÷(96÷2.706+4.0÷3.1)=2.719

[0042] In the formula: 96 is the proportion of aggregate in the mixture; 2.706 is the relative theoretical density of aggregate after mixing according to the design ratio of stone; 4.0 is the proportion of cement in the mixture; 3.1 is the relative densi...

Embodiment 2

[0072] In this embodiment, the same material as that in the first embodiment is used, and the moisture content of the mixture is designed by using the geotechnical heavy-duty compaction method.

[0073] In this design example, the measured value of the raw data of the relevant constituent materials of the cement-stabilized macadam road pavement mixture ， As in Table 1 above:

[0074] 1. After mixing according to the design ratio of the aggregate, the maximum relative theoretical density of the aggregate is calculated to be 2.706;

[0075] 2. Calculate the maximum relative theoretical density of the mixture when it contains cement:

[0076] 100÷(96÷2.706+4.0÷3.1)=2.719

[0077] In the formula: 96 is the proportion of aggregate in the mixture; 2.706 is the relative theoretical density of aggregate after mixing according to the design ratio of stone; 4.0 is the proportion of cement in the mixture; 3.1 is the relative density of cement .

[0078] 3. According to Table 1 above,...

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