CN102659349A - Method for preparing waste oilstone-normal-temperature pitch mixture - Google Patents

Abstract

The invention relates to a method for preparing a waste oilstone-normal-temperature pitch mixture, which is suitable for repairing the surface course of a pitch road. The method comprises the following steps of: (1) screening the waste oilstones; (2) preparing diluted pitch: a, the diluted pitch comprises the following components in weight percent of 69-79% of pitch, 20-30 of diluent, and 1% of additive; (3) determining the dosing proportions of the waste oilstones, new stone materials and pitch; and (4) blending the waste oilstones with the normal-temperature pitch to obtain the mixture. The method has the following advantages that the tone materials and residual pitch in the waste oilstones are thoroughly utilized, so that the stone materials and partial pitch are saved, and the production cost is reduced by about 25%; besides, the waste oilstones in repair of the pitch road is also effectively utilized; and therefore the wastes are changed into valuable materials.

Description

The preparation method of old oilstone normal temperature asphalt

Technical field

The present invention relates to a kind of preparation method of old oilstone normal temperature asphalt.

Background technology

In the repairing and refurbishment process of bituminous pavement top, the old oilstone of milling or removing has generally all been handled as the rubbish of repairing the roads, because the staple of old oilstone is building stones, pitch and breeze etc., can cause great waste like this.

Summary of the invention

Technical problem to be solved by this invention provides a kind of building stones and residual asphalt that can make full use of in the old oilstone, reduces the preparation method of the old oilstone normal temperature asphalt of the cost of repairing the roads greatly.

The technical solution adopted for the present invention to solve the technical problems:

A kind of preparation method of old oilstone normal temperature asphalt is characterized in that its step is following:

(1) old oilstone is sieved:

At first, the old oilstone that goes out milling in Reparation of Bituminous Pavement sieves and obtains the old oilstone of all kinds, and the aperture of said sieve is more than one in following: 5mm, 10mm, 15mm;

Then, the old oilstone of said all kinds is removed pitch wherein with the used asphalt extraction test of this bituminous pavement appearance respectively, with standard sieve remaining mineral aggregate is sieved again, thereby the old oilstone compound of the type that obtains mineral aggregate gradation is formed;

(2) prepared and diluted pitch:

A. the component of fluxed asphalt and weight percent are following:

Pitch: 69-79

Thinner: 20-30

Additive: 1

B. collocation method is following:

Mix said thinner and additive when pitch is heated to 150 ℃, mix with whisking appliance and join evenly, process fluxed asphalt;

Described pitch is selected for use No. 110 or No. 90 bi tumenf orr oads;

Said thinner is selected kerosene or diesel oil for use;

Said additive is a normal temperature asphalt additive;

(3) confirm that old oilstone, new building stones and bituminous cooperate ratio:

Utilize the screening result of step (1) and mix and join required normal temperature asphalt mixture gradation type; Join to reach the requirement of normal temperature asphalt mixture gradation the time when only mixing with old oilstone; Need to add new building stones, add the amount of new building stones and calculate by normal temperature asphalt mixture gradation type;

Asphalt content adopts cohesiveness TP and cold repairing asphalt mixture Marshall Test method to confirm;

(4) old oilstone normal temperature asphalt mixes and stirs:

The cooperation ratio of (3) the old oilstone confirmed and new building stones is added to them and forces to carry out dry mixing, after the uniform mixing in the blunger set by step; The asphalt content of confirming according to step (3) again, the quantity of amounting to the fluxed asphalt that becomes to prepare again is added to it in pressure blunger; Uniform mixing does not have the flower material, emits compound; Be incorporated with then in the air-locked packing bag of inner membrance, be old oilstone normal temperature asphalt finished product.

Beneficial effect of the present invention is following:

(1) the present invention has made full use of building stones and the residual asphalt in the old oilstone, thereby has saved building stones and part pitch, reduces production costs about 25%, also makes the old oilstone of waste in asphalt pavement maintenance, has obtained effective utilization, turns waste into wealth.

(2) the old oilstone normal temperature asphalt of the present invention's preparation can be used for the repairing of pavement disease throughout the year.

(3) this preparation method simple to operate, be easy to grasp.

Description of drawings

Fig. 1 is mineral aggregate gradation screening broken line graph.

Fig. 2 is cohesiveness test broken line graph.

Fig. 3 is a cold repairing asphalt mixture Marshall Test broken line graph.

In Fig. 1,1 accumulative total percent of pass range limit, 2 accumulative total percent of pass scope lower limits, 3 accumulative total percent of pass actual effects.

Embodiment

Embodiment 1 (preparation is used for the preparation method of the old oilstone normal temperature asphalt of the low use in season of temperature):

The preparation process of present embodiment is following:

(1) old oilstone is sieved:

At first, the old oilstone that goes out milling in Reparation of Bituminous Pavement sieves and obtains the old oilstone of all kinds, and the aperture of said sieve is more than one in following: 5mm, 10mm, 15mm;

Then, the old oilstone of said all kinds is removed pitch wherein with the used asphalt extraction test of this bituminous pavement appearance respectively, with standard sieve remaining mineral aggregate is sieved again, thereby the old oilstone compound of the type that obtains mineral aggregate gradation is formed;

(2) prepared and diluted pitch:

A. the component of fluxed asphalt and weight percent are following:

Pitch: 69

Thinner: 30

Additive: 1

B. collocation method is following:

Mix said thinner and additive when pitch is heated to 150 ℃, mix with whisking appliance and join evenly, process fluxed asphalt;

Described pitch is selected for use No. 110 or No. 90 bi tumenf orr oads;

Said thinner is selected kerosene or diesel oil for use;

Said additive is a normal temperature asphalt additive;

(3) confirm that old oilstone, new building stones and bituminous cooperate ratio:

Utilize the screening result of step (1) and mix and join required normal temperature asphalt mixture gradation type; Join to reach the requirement of normal temperature asphalt mixture gradation the time when only mixing with old oilstone; Need to add new building stones, add the amount of new building stones and calculate by normal temperature asphalt mixture gradation type;

Asphalt content adopts cohesiveness TP and cold repairing asphalt mixture Marshall Test method to confirm;

(4) old oilstone normal temperature asphalt mixes and stirs:

The cooperation ratio of (3) the old oilstone confirmed and new building stones is added to them and forces to carry out dry mixing, after the uniform mixing in the blunger set by step; The asphalt content of confirming according to step (3) again, the quantity of amounting to the fluxed asphalt that becomes to prepare again is added to it in pressure blunger; Uniform mixing does not have the flower material, emits compound; Be incorporated with then in the air-locked packing bag of inner membrance, be old oilstone normal temperature asphalt finished product.

Annotate: pitch: 69

Thinner: 30

Additive: 1.

Embodiment 2 (preparation is used for the preparation method of the old oilstone asphalt of the high use in season of temperature):

Embodiment 2 and embodiment 1 are different is that the component and the weight percent of fluxed asphalt is following:

Pitch: 79

Thinner: 20

Additive: 1.

Embodiment 3: a kind of method for preparing old oilstone normal temperature asphalt, and step is following:

(1) the old oilstone of asphalt pavement of highway maintenance work milling, use the aperture to sieve as 5mm sieve, obtain less than 5mm with greater than the old oilstone of two types of 5mm.

(2) getting representative sample less than 5mm with in greater than two types of old oilstone materials of 5mm, remove the pitch in the old oilstone with asphalt extraction test appearance, with standard sieve remaining mineral aggregate is carried out size analysis respectively, screening result is seen table 1.

 

Table 1: old oilstone mineral aggregate screening result

(3) produce as required in the old oilstone normal temperature of grain formula LB-16 type asphalt.Only use less than the old oilstone of 5mm with greater than the mineral aggregate of the old oilstone of 5mm, mix and join the mineral aggregate gradation requirement that can not satisfy the old oilstone normal temperature of LB-16 type asphalt, need to add the new building stones of 10-20mm rubble, its screening result is seen table 2.Less than the old oilstone material of 5mm, greater than the old oilstone of 5mm and these three kinds of mineral aggregates of 10-20mm rubble mix mixing ratio and LB-16 type mineral aggregate gradation combined result is seen table 3 and Fig. 1.

Table 2: mineral aggregate screening result table

Table 3:LB-16 type mineral aggregate gradation combination table

(4) old oilstone normal temperature asphalt uses be autumn in season, confirms pitch: diesel oil: normal temperature asphalt additive=74:25:1.Heat No. 90 bi tumenf orr oads to 150 ℃, add diesel oil and normal temperature asphalt additive according to the above ratio, mix with whisking appliance and join evenly, process fluxed asphalt.

(5) do old oilstone normal temperature asphalt cohesiveness test; Press the LB-16 type mineral aggregate gradation combined result of table 3, the compound that mixes and stirs different pitches content (2.0%, 2.5%, 3.0%, 3.5%, 4.0%) is packed compound 800g in the Marshall die trial into respectively, puts into 4 ℃ of thermostatic chamber 2-3h; Take out two-sided 5 the system test specimens in fact that respectively hit in back; Be placed on after the demoulding on the standard sieve, it is upright and test specimen is rolled 20 times along screen frame back and forth, and breakage rate must not be greater than 40% (code requirement).The result sees table 4, Fig. 2.

Table 4: cohesiveness test-results table

Asphalt content %	2.0	2.5	3.0	3.5	4.0
						Breakage rate %	57	30	16	7	0

Do old oilstone normal temperature asphalt Marshall Test; The old oilstone normal temperature asphalt 1180g that claims different pitches content (2.0%, 2.5%, 3.0%, 3.5%, 4.0%) is respectively charged in the die trial at normal temperatures; Two-sided respectively hitting real 75 times; Put health 24h in 110 ℃ of baking ovens together with die trial with side setting mode, two again after the taking-up

Face respectively hits real 25 times, erects at room temperature together with die trial and places 24h.After the demoulding in 60 ℃ of constant temperature sulculuses health 30min carry out Marshall Test, stability should be not less than 3KN (code requirement) result and see table 5, Fig. 3.

Can find out that through table 4, Fig. 2 and table 5, Fig. 3 asphalt content cohesiveness and Marshall stability between 2.5-3.5% satisfy code requirement.

 

Table 5: Marshall Test is table as a result

Asphalt content %	2.0	2.5	3.0	3.5	4.0
						Stability KN	2.1	3.3	4.7	4.9	2.8

Confirm that through above test and practical effect the old oilstone normal temperature of LB-16 type asphalt asphalt content is 3.0%.

(6) force the every dish of blunger can mix and stir the 150kg siccative.According to the mineral aggregate proportioning that test is confirmed, 10-20mm rubble: greater than the old oilstone of 5mm: less than the old oilstone=20:70:10 of 5mm, every dish need add 10-20mm rubble 30kg, greater than the old oilstone 105kg of 5mm, less than the old oilstone 15kg of 5mm, dry mixing 3min.According to the test asphalt content is 3.0%, and every dish need add pitch 4.64kg, and the fluxed asphalt of amounting to into preparation should add 6.27kg, mixes and stirs 5min after the adding, does not evenly emit behind the flower material.Be incorporated with in the air-locked packing bag of inner membrance, seal.

Common normal temperature asphalt production cost per ton is seen table 6:

Old oilstone normal temperature asphalt production cost per ton is seen table 7;

It is thus clear that common normal temperature asphalt production cost per ton is 520.4 yuan, old oilstone normal temperature asphalt production cost per ton is 389.3 yuan.

 

520.4-389.3

Save production cost=

* 100%=25.2%

520.4

Table 6: common normal temperature asphalt production cost analytical table per ton

Project	Unit	Unit price (unit)	Quantity	The amount of money (unit)
					Mineral aggregate	Ton	44	0.944	41.5
Pitch	Kg	5.3	45	238.5
					Thinner	Kg	7.5	10.69	80.2
Additive	Kg	112	0.56	62.7
					The productive manpower is taken	Unit	?	?	20
Packing bag	Individual	1.5	20	30
					The pitch machine-team expense of heating	Machine-team	1500	0.025	37.5
Other expense	Unit	?	?	10
					Add up to	?	?	?	520.4

Table 7: old oilstone normal temperature asphalt production cost analytical table per ton

Project	Unit	Unit price (unit)	Quantity	The amount of money (unit)
					The 10-20mm rubble	Ton	44	0.192	8.4
Old oilstone	t	15	0.768	11.5
					Pitch	Kg	5.3	30	159
Thinner	Kg	7.5	10.13	76.0
					Additive	Kg	112	0.41	45.9
Labour cost	Unit	?	?	20
					Packing bag	Individual	1.5	20	30
The pitch machine-team expense of heating	Machine-team	1500	0.019	28.5
					Other takes	?	?	?	10
Add up to	?	?	?	389.3

Repair 1000m ²5cm thick 118 tons of the asphalts that need in road surface are repaired 15469.8 yuan of saving funds with old oilstone normal temperature asphalt.

Claims (1)

1. the preparation method of an old oilstone normal temperature asphalt is characterized in that its step is following:

(1) old oilstone is sieved:

At first, the old oilstone that goes out milling in Reparation of Bituminous Pavement sieves and obtains the old oilstone of all kinds, and the aperture of said sieve is more than one in following: 5mm, 10mm, 15mm;

Then, the old oilstone of said all kinds is removed pitch wherein with the used asphalt extraction test of this bituminous pavement appearance respectively, with standard sieve remaining mineral aggregate is sieved again, thereby the old oilstone compound of the type that obtains mineral aggregate gradation is formed;

(2) prepared and diluted pitch:

A. the component of fluxed asphalt and weight percent are following:

Pitch: 69-79

Thinner: 20-30

Additive: 1

B. collocation method is following:

Mix said thinner and additive when pitch is heated to 150 ℃, mix with whisking appliance and join evenly, process fluxed asphalt;

Described pitch is selected for use No. 110 or No. 90 bi tumenf orr oads;

Said thinner is selected kerosene or diesel oil for use;

Said additive is a normal temperature asphalt additive;

(3) confirm that old oilstone, new building stones and bituminous cooperate ratio:

Utilize the screening result of step (1) and mix and join required normal temperature asphalt mixture gradation type; Join to reach the requirement of normal temperature asphalt mixture gradation the time when only mixing with old oilstone; Need to add new building stones, add the amount of new building stones and calculate by normal temperature asphalt mixture gradation type;

Asphalt content adopts cohesiveness TP and cold repairing asphalt mixture Marshall Test method to confirm;

(4) old oilstone normal temperature asphalt mixes and stirs:

The cooperation ratio of (3) the old oilstone confirmed and new building stones is added to them and forces to carry out dry mixing, after the uniform mixing in the blunger set by step; The asphalt content of confirming according to step (3) again, the quantity of amounting to the fluxed asphalt that becomes to prepare again is added to it in pressure blunger; Uniform mixing does not have the flower material, emits compound; Be incorporated with then in the air-locked packing bag of inner membrance, be old oilstone normal temperature asphalt finished product.

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